diff options
Diffstat (limited to 'kernel/include/xen')
43 files changed, 6878 insertions, 0 deletions
diff --git a/kernel/include/xen/acpi.h b/kernel/include/xen/acpi.h new file mode 100644 index 000000000..4ddd7dc4a --- /dev/null +++ b/kernel/include/xen/acpi.h @@ -0,0 +1,111 @@ +/****************************************************************************** + * acpi.h + * acpi file for domain 0 kernel + * + * Copyright (c) 2011 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> + * Copyright (c) 2011 Yu Ke <ke.yu@intel.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation; or, when distributed + * separately from the Linux kernel or incorporated into other + * software packages, subject to the following license: + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this source file (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, modify, + * merge, publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef _XEN_ACPI_H +#define _XEN_ACPI_H + +#include <linux/types.h> + +#ifdef CONFIG_XEN_DOM0 +#include <asm/xen/hypervisor.h> +#include <xen/xen.h> +#include <linux/acpi.h> + +#define ACPI_MEMORY_DEVICE_CLASS "memory" +#define ACPI_MEMORY_DEVICE_HID "PNP0C80" +#define ACPI_MEMORY_DEVICE_NAME "Hotplug Mem Device" + +int xen_stub_memory_device_init(void); +void xen_stub_memory_device_exit(void); + +#define ACPI_PROCESSOR_CLASS "processor" +#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007" +#define ACPI_PROCESSOR_DEVICE_NAME "Processor" + +int xen_stub_processor_init(void); +void xen_stub_processor_exit(void); + +void xen_pcpu_hotplug_sync(void); +int xen_pcpu_id(uint32_t acpi_id); + +static inline int xen_acpi_get_pxm(acpi_handle h) +{ + unsigned long long pxm; + acpi_status status; + acpi_handle handle; + acpi_handle phandle = h; + + do { + handle = phandle; + status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm); + if (ACPI_SUCCESS(status)) + return pxm; + status = acpi_get_parent(handle, &phandle); + } while (ACPI_SUCCESS(status)); + + return -ENXIO; +} + +int xen_acpi_notify_hypervisor_sleep(u8 sleep_state, + u32 pm1a_cnt, u32 pm1b_cnd); +int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state, + u32 val_a, u32 val_b); + +static inline int xen_acpi_suspend_lowlevel(void) +{ + /* + * Xen will save and restore CPU context, so + * we can skip that and just go straight to + * the suspend. + */ + acpi_enter_sleep_state(ACPI_STATE_S3); + return 0; +} + +static inline void xen_acpi_sleep_register(void) +{ + if (xen_initial_domain()) { + acpi_os_set_prepare_sleep( + &xen_acpi_notify_hypervisor_sleep); + acpi_os_set_prepare_extended_sleep( + &xen_acpi_notify_hypervisor_extended_sleep); + + acpi_suspend_lowlevel = xen_acpi_suspend_lowlevel; + } +} +#else +static inline void xen_acpi_sleep_register(void) +{ +} +#endif + +#endif /* _XEN_ACPI_H */ diff --git a/kernel/include/xen/balloon.h b/kernel/include/xen/balloon.h new file mode 100644 index 000000000..a4c1c6a93 --- /dev/null +++ b/kernel/include/xen/balloon.h @@ -0,0 +1,43 @@ +/****************************************************************************** + * Xen balloon functionality + */ + +#define RETRY_UNLIMITED 0 + +struct balloon_stats { + /* We aim for 'current allocation' == 'target allocation'. */ + unsigned long current_pages; + unsigned long target_pages; + /* Number of pages in high- and low-memory balloons. */ + unsigned long balloon_low; + unsigned long balloon_high; + unsigned long schedule_delay; + unsigned long max_schedule_delay; + unsigned long retry_count; + unsigned long max_retry_count; +#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG + unsigned long hotplug_pages; + unsigned long balloon_hotplug; +#endif +}; + +extern struct balloon_stats balloon_stats; + +void balloon_set_new_target(unsigned long target); + +int alloc_xenballooned_pages(int nr_pages, struct page **pages, + bool highmem); +void free_xenballooned_pages(int nr_pages, struct page **pages); + +struct page *get_balloon_scratch_page(void); +void put_balloon_scratch_page(void); + +struct device; +#ifdef CONFIG_XEN_SELFBALLOONING +extern int register_xen_selfballooning(struct device *dev); +#else +static inline int register_xen_selfballooning(struct device *dev) +{ + return -ENOSYS; +} +#endif diff --git a/kernel/include/xen/events.h b/kernel/include/xen/events.h new file mode 100644 index 000000000..7d95fdf9c --- /dev/null +++ b/kernel/include/xen/events.h @@ -0,0 +1,129 @@ +#ifndef _XEN_EVENTS_H +#define _XEN_EVENTS_H + +#include <linux/interrupt.h> +#ifdef CONFIG_PCI_MSI +#include <linux/msi.h> +#endif + +#include <xen/interface/event_channel.h> +#include <asm/xen/hypercall.h> +#include <asm/xen/events.h> + +unsigned xen_evtchn_nr_channels(void); + +int bind_evtchn_to_irq(unsigned int evtchn); +int bind_evtchn_to_irqhandler(unsigned int evtchn, + irq_handler_t handler, + unsigned long irqflags, const char *devname, + void *dev_id); +int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu); +int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, + irq_handler_t handler, + unsigned long irqflags, const char *devname, + void *dev_id); +int bind_ipi_to_irqhandler(enum ipi_vector ipi, + unsigned int cpu, + irq_handler_t handler, + unsigned long irqflags, + const char *devname, + void *dev_id); +int bind_interdomain_evtchn_to_irq(unsigned int remote_domain, + unsigned int remote_port); +int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain, + unsigned int remote_port, + irq_handler_t handler, + unsigned long irqflags, + const char *devname, + void *dev_id); + +/* + * Common unbind function for all event sources. Takes IRQ to unbind from. + * Automatically closes the underlying event channel (even for bindings + * made with bind_evtchn_to_irqhandler()). + */ +void unbind_from_irqhandler(unsigned int irq, void *dev_id); + +#define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX +#define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT +#define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN +int xen_set_irq_priority(unsigned irq, unsigned priority); + +/* + * Allow extra references to event channels exposed to userspace by evtchn + */ +int evtchn_make_refcounted(unsigned int evtchn); +int evtchn_get(unsigned int evtchn); +void evtchn_put(unsigned int evtchn); + +void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector); +void rebind_evtchn_irq(int evtchn, int irq); + +static inline void notify_remote_via_evtchn(int port) +{ + struct evtchn_send send = { .port = port }; + (void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send); +} + +void notify_remote_via_irq(int irq); + +void xen_irq_resume(void); + +/* Clear an irq's pending state, in preparation for polling on it */ +void xen_clear_irq_pending(int irq); +void xen_set_irq_pending(int irq); +bool xen_test_irq_pending(int irq); + +/* Poll waiting for an irq to become pending. In the usual case, the + irq will be disabled so it won't deliver an interrupt. */ +void xen_poll_irq(int irq); + +/* Poll waiting for an irq to become pending with a timeout. In the usual case, + * the irq will be disabled so it won't deliver an interrupt. */ +void xen_poll_irq_timeout(int irq, u64 timeout); + +/* Determine the IRQ which is bound to an event channel */ +unsigned irq_from_evtchn(unsigned int evtchn); +int irq_from_virq(unsigned int cpu, unsigned int virq); +unsigned int evtchn_from_irq(unsigned irq); + +/* Xen HVM evtchn vector callback */ +void xen_hvm_callback_vector(void); +#ifdef CONFIG_TRACING +#define trace_xen_hvm_callback_vector xen_hvm_callback_vector +#endif +extern int xen_have_vector_callback; +int xen_set_callback_via(uint64_t via); +void xen_evtchn_do_upcall(struct pt_regs *regs); +void xen_hvm_evtchn_do_upcall(void); + +/* Bind a pirq for a physical interrupt to an irq. */ +int xen_bind_pirq_gsi_to_irq(unsigned gsi, + unsigned pirq, int shareable, char *name); + +#ifdef CONFIG_PCI_MSI +/* Allocate a pirq for a MSI style physical interrupt. */ +int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc); +/* Bind an PSI pirq to an irq. */ +int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, + int pirq, int nvec, const char *name, domid_t domid); +#endif + +/* De-allocates the above mentioned physical interrupt. */ +int xen_destroy_irq(int irq); + +/* Return irq from pirq */ +int xen_irq_from_pirq(unsigned pirq); + +/* Return the pirq allocated to the irq. */ +int xen_pirq_from_irq(unsigned irq); + +/* Return the irq allocated to the gsi */ +int xen_irq_from_gsi(unsigned gsi); + +/* Determine whether to ignore this IRQ if it is passed to a guest. */ +int xen_test_irq_shared(int irq); + +/* initialize Xen IRQ subsystem */ +void xen_init_IRQ(void); +#endif /* _XEN_EVENTS_H */ diff --git a/kernel/include/xen/features.h b/kernel/include/xen/features.h new file mode 100644 index 000000000..27292d4d2 --- /dev/null +++ b/kernel/include/xen/features.h @@ -0,0 +1,23 @@ +/****************************************************************************** + * features.h + * + * Query the features reported by Xen. + * + * Copyright (c) 2006, Ian Campbell + */ + +#ifndef __XEN_FEATURES_H__ +#define __XEN_FEATURES_H__ + +#include <xen/interface/features.h> + +void xen_setup_features(void); + +extern u8 xen_features[XENFEAT_NR_SUBMAPS * 32]; + +static inline int xen_feature(int flag) +{ + return xen_features[flag]; +} + +#endif /* __ASM_XEN_FEATURES_H__ */ diff --git a/kernel/include/xen/grant_table.h b/kernel/include/xen/grant_table.h new file mode 100644 index 000000000..4478f4b4a --- /dev/null +++ b/kernel/include/xen/grant_table.h @@ -0,0 +1,227 @@ +/****************************************************************************** + * grant_table.h + * + * Two sets of functionality: + * 1. Granting foreign access to our memory reservation. + * 2. Accessing others' memory reservations via grant references. + * (i.e., mechanisms for both sender and recipient of grant references) + * + * Copyright (c) 2004-2005, K A Fraser + * Copyright (c) 2005, Christopher Clark + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation; or, when distributed + * separately from the Linux kernel or incorporated into other + * software packages, subject to the following license: + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this source file (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, modify, + * merge, publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef __ASM_GNTTAB_H__ +#define __ASM_GNTTAB_H__ + +#include <asm/page.h> + +#include <xen/interface/xen.h> +#include <xen/interface/grant_table.h> + +#include <asm/xen/hypervisor.h> + +#include <xen/features.h> +#include <linux/mm_types.h> +#include <linux/page-flags.h> + +#define GNTTAB_RESERVED_XENSTORE 1 + +/* NR_GRANT_FRAMES must be less than or equal to that configured in Xen */ +#define NR_GRANT_FRAMES 4 + +struct gnttab_free_callback { + struct gnttab_free_callback *next; + void (*fn)(void *); + void *arg; + u16 count; +}; + +struct gntab_unmap_queue_data; + +typedef void (*gnttab_unmap_refs_done)(int result, struct gntab_unmap_queue_data *data); + +struct gntab_unmap_queue_data +{ + struct delayed_work gnttab_work; + void *data; + gnttab_unmap_refs_done done; + struct gnttab_unmap_grant_ref *unmap_ops; + struct gnttab_unmap_grant_ref *kunmap_ops; + struct page **pages; + unsigned int count; + unsigned int age; +}; + +int gnttab_init(void); +int gnttab_suspend(void); +int gnttab_resume(void); + +int gnttab_grant_foreign_access(domid_t domid, unsigned long frame, + int readonly); + +/* + * End access through the given grant reference, iff the grant entry is no + * longer in use. Return 1 if the grant entry was freed, 0 if it is still in + * use. + */ +int gnttab_end_foreign_access_ref(grant_ref_t ref, int readonly); + +/* + * Eventually end access through the given grant reference, and once that + * access has been ended, free the given page too. Access will be ended + * immediately iff the grant entry is not in use, otherwise it will happen + * some time later. page may be 0, in which case no freeing will occur. + */ +void gnttab_end_foreign_access(grant_ref_t ref, int readonly, + unsigned long page); + +int gnttab_grant_foreign_transfer(domid_t domid, unsigned long pfn); + +unsigned long gnttab_end_foreign_transfer_ref(grant_ref_t ref); +unsigned long gnttab_end_foreign_transfer(grant_ref_t ref); + +int gnttab_query_foreign_access(grant_ref_t ref); + +/* + * operations on reserved batches of grant references + */ +int gnttab_alloc_grant_references(u16 count, grant_ref_t *pprivate_head); + +void gnttab_free_grant_reference(grant_ref_t ref); + +void gnttab_free_grant_references(grant_ref_t head); + +int gnttab_empty_grant_references(const grant_ref_t *pprivate_head); + +int gnttab_claim_grant_reference(grant_ref_t *pprivate_head); + +void gnttab_release_grant_reference(grant_ref_t *private_head, + grant_ref_t release); + +void gnttab_request_free_callback(struct gnttab_free_callback *callback, + void (*fn)(void *), void *arg, u16 count); +void gnttab_cancel_free_callback(struct gnttab_free_callback *callback); + +void gnttab_grant_foreign_access_ref(grant_ref_t ref, domid_t domid, + unsigned long frame, int readonly); + +void gnttab_grant_foreign_transfer_ref(grant_ref_t, domid_t domid, + unsigned long pfn); + +static inline void +gnttab_set_map_op(struct gnttab_map_grant_ref *map, phys_addr_t addr, + uint32_t flags, grant_ref_t ref, domid_t domid) +{ + if (flags & GNTMAP_contains_pte) + map->host_addr = addr; + else if (xen_feature(XENFEAT_auto_translated_physmap)) + map->host_addr = __pa(addr); + else + map->host_addr = addr; + + map->flags = flags; + map->ref = ref; + map->dom = domid; +} + +static inline void +gnttab_set_unmap_op(struct gnttab_unmap_grant_ref *unmap, phys_addr_t addr, + uint32_t flags, grant_handle_t handle) +{ + if (flags & GNTMAP_contains_pte) + unmap->host_addr = addr; + else if (xen_feature(XENFEAT_auto_translated_physmap)) + unmap->host_addr = __pa(addr); + else + unmap->host_addr = addr; + + unmap->handle = handle; + unmap->dev_bus_addr = 0; +} + +int arch_gnttab_init(unsigned long nr_shared); +int arch_gnttab_map_shared(xen_pfn_t *frames, unsigned long nr_gframes, + unsigned long max_nr_gframes, + void **__shared); +void arch_gnttab_unmap(void *shared, unsigned long nr_gframes); + +struct grant_frames { + xen_pfn_t *pfn; + unsigned int count; + void *vaddr; +}; +extern struct grant_frames xen_auto_xlat_grant_frames; +unsigned int gnttab_max_grant_frames(void); +int gnttab_setup_auto_xlat_frames(phys_addr_t addr); +void gnttab_free_auto_xlat_frames(void); + +#define gnttab_map_vaddr(map) ((void *)(map.host_virt_addr)) + +int gnttab_alloc_pages(int nr_pages, struct page **pages); +void gnttab_free_pages(int nr_pages, struct page **pages); + +int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops, + struct gnttab_map_grant_ref *kmap_ops, + struct page **pages, unsigned int count); +int gnttab_unmap_refs(struct gnttab_unmap_grant_ref *unmap_ops, + struct gnttab_unmap_grant_ref *kunmap_ops, + struct page **pages, unsigned int count); +void gnttab_unmap_refs_async(struct gntab_unmap_queue_data* item); +int gnttab_unmap_refs_sync(struct gntab_unmap_queue_data *item); + + +/* Perform a batch of grant map/copy operations. Retry every batch slot + * for which the hypervisor returns GNTST_eagain. This is typically due + * to paged out target frames. + * + * Will retry for 1, 2, ... 255 ms, i.e. 256 times during 32 seconds. + * + * Return value in each iand every status field of the batch guaranteed + * to not be GNTST_eagain. + */ +void gnttab_batch_map(struct gnttab_map_grant_ref *batch, unsigned count); +void gnttab_batch_copy(struct gnttab_copy *batch, unsigned count); + + +struct xen_page_foreign { + domid_t domid; + grant_ref_t gref; +}; + +static inline struct xen_page_foreign *xen_page_foreign(struct page *page) +{ + if (!PageForeign(page)) + return NULL; +#if BITS_PER_LONG < 64 + return (struct xen_page_foreign *)page->private; +#else + BUILD_BUG_ON(sizeof(struct xen_page_foreign) > BITS_PER_LONG); + return (struct xen_page_foreign *)&page->private; +#endif +} + +#endif /* __ASM_GNTTAB_H__ */ diff --git a/kernel/include/xen/hvc-console.h b/kernel/include/xen/hvc-console.h new file mode 100644 index 000000000..b62dfef15 --- /dev/null +++ b/kernel/include/xen/hvc-console.h @@ -0,0 +1,18 @@ +#ifndef XEN_HVC_CONSOLE_H +#define XEN_HVC_CONSOLE_H + +extern struct console xenboot_console; + +#ifdef CONFIG_HVC_XEN +void xen_console_resume(void); +void xen_raw_console_write(const char *str); +__printf(1, 2) +void xen_raw_printk(const char *fmt, ...); +#else +static inline void xen_console_resume(void) { } +static inline void xen_raw_console_write(const char *str) { } +static inline __printf(1, 2) +void xen_raw_printk(const char *fmt, ...) { } +#endif + +#endif /* XEN_HVC_CONSOLE_H */ diff --git a/kernel/include/xen/hvm.h b/kernel/include/xen/hvm.h new file mode 100644 index 000000000..63917a8de --- /dev/null +++ b/kernel/include/xen/hvm.h @@ -0,0 +1,60 @@ +/* Simple wrappers around HVM functions */ +#ifndef XEN_HVM_H__ +#define XEN_HVM_H__ + +#include <xen/interface/hvm/params.h> +#include <asm/xen/hypercall.h> + +static const char *param_name(int op) +{ +#define PARAM(x) [HVM_PARAM_##x] = #x + static const char *const names[] = { + PARAM(CALLBACK_IRQ), + PARAM(STORE_PFN), + PARAM(STORE_EVTCHN), + PARAM(PAE_ENABLED), + PARAM(IOREQ_PFN), + PARAM(BUFIOREQ_PFN), + PARAM(TIMER_MODE), + PARAM(HPET_ENABLED), + PARAM(IDENT_PT), + PARAM(DM_DOMAIN), + PARAM(ACPI_S_STATE), + PARAM(VM86_TSS), + PARAM(VPT_ALIGN), + PARAM(CONSOLE_PFN), + PARAM(CONSOLE_EVTCHN), + }; +#undef PARAM + + if (op >= ARRAY_SIZE(names)) + return "unknown"; + + if (!names[op]) + return "reserved"; + + return names[op]; +} +static inline int hvm_get_parameter(int idx, uint64_t *value) +{ + struct xen_hvm_param xhv; + int r; + + xhv.domid = DOMID_SELF; + xhv.index = idx; + r = HYPERVISOR_hvm_op(HVMOP_get_param, &xhv); + if (r < 0) { + pr_err("Cannot get hvm parameter %s (%d): %d!\n", + param_name(idx), idx, r); + return r; + } + *value = xhv.value; + return r; +} + +#define HVM_CALLBACK_VIA_TYPE_VECTOR 0x2 +#define HVM_CALLBACK_VIA_TYPE_SHIFT 56 +#define HVM_CALLBACK_VECTOR(x) (((uint64_t)HVM_CALLBACK_VIA_TYPE_VECTOR)<<\ + HVM_CALLBACK_VIA_TYPE_SHIFT | (x)) + +#endif /* XEN_HVM_H__ */ diff --git a/kernel/include/xen/interface/callback.h b/kernel/include/xen/interface/callback.h new file mode 100644 index 000000000..dc3193f4b --- /dev/null +++ b/kernel/include/xen/interface/callback.h @@ -0,0 +1,102 @@ +/****************************************************************************** + * callback.h + * + * Register guest OS callbacks with Xen. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Copyright (c) 2006, Ian Campbell + */ + +#ifndef __XEN_PUBLIC_CALLBACK_H__ +#define __XEN_PUBLIC_CALLBACK_H__ + +#include <xen/interface/xen.h> + +/* + * Prototype for this hypercall is: + * long callback_op(int cmd, void *extra_args) + * @cmd == CALLBACKOP_??? (callback operation). + * @extra_args == Operation-specific extra arguments (NULL if none). + */ + +/* x86: Callback for event delivery. */ +#define CALLBACKTYPE_event 0 + +/* x86: Failsafe callback when guest state cannot be restored by Xen. */ +#define CALLBACKTYPE_failsafe 1 + +/* x86/64 hypervisor: Syscall by 64-bit guest app ('64-on-64-on-64'). */ +#define CALLBACKTYPE_syscall 2 + +/* + * x86/32 hypervisor: Only available on x86/32 when supervisor_mode_kernel + * feature is enabled. Do not use this callback type in new code. + */ +#define CALLBACKTYPE_sysenter_deprecated 3 + +/* x86: Callback for NMI delivery. */ +#define CALLBACKTYPE_nmi 4 + +/* + * x86: sysenter is only available as follows: + * - 32-bit hypervisor: with the supervisor_mode_kernel feature enabled + * - 64-bit hypervisor: 32-bit guest applications on Intel CPUs + * ('32-on-32-on-64', '32-on-64-on-64') + * [nb. also 64-bit guest applications on Intel CPUs + * ('64-on-64-on-64'), but syscall is preferred] + */ +#define CALLBACKTYPE_sysenter 5 + +/* + * x86/64 hypervisor: Syscall by 32-bit guest app on AMD CPUs + * ('32-on-32-on-64', '32-on-64-on-64') + */ +#define CALLBACKTYPE_syscall32 7 + +/* + * Disable event deliver during callback? This flag is ignored for event and + * NMI callbacks: event delivery is unconditionally disabled. + */ +#define _CALLBACKF_mask_events 0 +#define CALLBACKF_mask_events (1U << _CALLBACKF_mask_events) + +/* + * Register a callback. + */ +#define CALLBACKOP_register 0 +struct callback_register { + uint16_t type; + uint16_t flags; + xen_callback_t address; +}; + +/* + * Unregister a callback. + * + * Not all callbacks can be unregistered. -EINVAL will be returned if + * you attempt to unregister such a callback. + */ +#define CALLBACKOP_unregister 1 +struct callback_unregister { + uint16_t type; + uint16_t _unused; +}; + +#endif /* __XEN_PUBLIC_CALLBACK_H__ */ diff --git a/kernel/include/xen/interface/elfnote.h b/kernel/include/xen/interface/elfnote.h new file mode 100644 index 000000000..f90b03454 --- /dev/null +++ b/kernel/include/xen/interface/elfnote.h @@ -0,0 +1,210 @@ +/****************************************************************************** + * elfnote.h + * + * Definitions used for the Xen ELF notes. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Copyright (c) 2006, Ian Campbell, XenSource Ltd. + */ + +#ifndef __XEN_PUBLIC_ELFNOTE_H__ +#define __XEN_PUBLIC_ELFNOTE_H__ + +/* + * The notes should live in a SHT_NOTE segment and have "Xen" in the + * name field. + * + * Numeric types are either 4 or 8 bytes depending on the content of + * the desc field. + * + * LEGACY indicated the fields in the legacy __xen_guest string which + * this a note type replaces. + * + * String values (for non-legacy) are NULL terminated ASCII, also known + * as ASCIZ type. + */ + +/* + * NAME=VALUE pair (string). + */ +#define XEN_ELFNOTE_INFO 0 + +/* + * The virtual address of the entry point (numeric). + * + * LEGACY: VIRT_ENTRY + */ +#define XEN_ELFNOTE_ENTRY 1 + +/* The virtual address of the hypercall transfer page (numeric). + * + * LEGACY: HYPERCALL_PAGE. (n.b. legacy value is a physical page + * number not a virtual address) + */ +#define XEN_ELFNOTE_HYPERCALL_PAGE 2 + +/* The virtual address where the kernel image should be mapped (numeric). + * + * Defaults to 0. + * + * LEGACY: VIRT_BASE + */ +#define XEN_ELFNOTE_VIRT_BASE 3 + +/* + * The offset of the ELF paddr field from the acutal required + * pseudo-physical address (numeric). + * + * This is used to maintain backwards compatibility with older kernels + * which wrote __PAGE_OFFSET into that field. This field defaults to 0 + * if not present. + * + * LEGACY: ELF_PADDR_OFFSET. (n.b. legacy default is VIRT_BASE) + */ +#define XEN_ELFNOTE_PADDR_OFFSET 4 + +/* + * The version of Xen that we work with (string). + * + * LEGACY: XEN_VER + */ +#define XEN_ELFNOTE_XEN_VERSION 5 + +/* + * The name of the guest operating system (string). + * + * LEGACY: GUEST_OS + */ +#define XEN_ELFNOTE_GUEST_OS 6 + +/* + * The version of the guest operating system (string). + * + * LEGACY: GUEST_VER + */ +#define XEN_ELFNOTE_GUEST_VERSION 7 + +/* + * The loader type (string). + * + * LEGACY: LOADER + */ +#define XEN_ELFNOTE_LOADER 8 + +/* + * The kernel supports PAE (x86/32 only, string = "yes" or "no"). + * + * LEGACY: PAE (n.b. The legacy interface included a provision to + * indicate 'extended-cr3' support allowing L3 page tables to be + * placed above 4G. It is assumed that any kernel new enough to use + * these ELF notes will include this and therefore "yes" here is + * equivalent to "yes[entended-cr3]" in the __xen_guest interface. + */ +#define XEN_ELFNOTE_PAE_MODE 9 + +/* + * The features supported/required by this kernel (string). + * + * The string must consist of a list of feature names (as given in + * features.h, without the "XENFEAT_" prefix) separated by '|' + * characters. If a feature is required for the kernel to function + * then the feature name must be preceded by a '!' character. + * + * LEGACY: FEATURES + */ +#define XEN_ELFNOTE_FEATURES 10 + +/* + * The kernel requires the symbol table to be loaded (string = "yes" or "no") + * LEGACY: BSD_SYMTAB (n.b. The legacy treated the presence or absence + * of this string as a boolean flag rather than requiring "yes" or + * "no". + */ +#define XEN_ELFNOTE_BSD_SYMTAB 11 + +/* + * The lowest address the hypervisor hole can begin at (numeric). + * + * This must not be set higher than HYPERVISOR_VIRT_START. Its presence + * also indicates to the hypervisor that the kernel can deal with the + * hole starting at a higher address. + */ +#define XEN_ELFNOTE_HV_START_LOW 12 + +/* + * List of maddr_t-sized mask/value pairs describing how to recognize + * (non-present) L1 page table entries carrying valid MFNs (numeric). + */ +#define XEN_ELFNOTE_L1_MFN_VALID 13 + +/* + * Whether or not the guest supports cooperative suspend cancellation. + * This is a numeric value. + * + * Default is 0 + */ +#define XEN_ELFNOTE_SUSPEND_CANCEL 14 + +/* + * The (non-default) location the initial phys-to-machine map should be + * placed at by the hypervisor (Dom0) or the tools (DomU). + * The kernel must be prepared for this mapping to be established using + * large pages, despite such otherwise not being available to guests. + * The kernel must also be able to handle the page table pages used for + * this mapping not being accessible through the initial mapping. + * (Only x86-64 supports this at present.) + */ +#define XEN_ELFNOTE_INIT_P2M 15 + +/* + * Whether or not the guest can deal with being passed an initrd not + * mapped through its initial page tables. + */ +#define XEN_ELFNOTE_MOD_START_PFN 16 + +/* + * The features supported by this kernel (numeric). + * + * Other than XEN_ELFNOTE_FEATURES on pre-4.2 Xen, this note allows a + * kernel to specify support for features that older hypervisors don't + * know about. The set of features 4.2 and newer hypervisors will + * consider supported by the kernel is the combination of the sets + * specified through this and the string note. + * + * LEGACY: FEATURES + */ +#define XEN_ELFNOTE_SUPPORTED_FEATURES 17 + +/* + * The number of the highest elfnote defined. + */ +#define XEN_ELFNOTE_MAX XEN_ELFNOTE_SUPPORTED_FEATURES + +#endif /* __XEN_PUBLIC_ELFNOTE_H__ */ + +/* + * Local variables: + * mode: C + * c-set-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/kernel/include/xen/interface/event_channel.h b/kernel/include/xen/interface/event_channel.h new file mode 100644 index 000000000..7e6acef54 --- /dev/null +++ b/kernel/include/xen/interface/event_channel.h @@ -0,0 +1,278 @@ +/****************************************************************************** + * event_channel.h + * + * Event channels between domains. + * + * Copyright (c) 2003-2004, K A Fraser. + */ + +#ifndef __XEN_PUBLIC_EVENT_CHANNEL_H__ +#define __XEN_PUBLIC_EVENT_CHANNEL_H__ + +#include <xen/interface/xen.h> + +typedef uint32_t evtchn_port_t; +DEFINE_GUEST_HANDLE(evtchn_port_t); + +/* + * EVTCHNOP_alloc_unbound: Allocate a port in domain <dom> and mark as + * accepting interdomain bindings from domain <remote_dom>. A fresh port + * is allocated in <dom> and returned as <port>. + * NOTES: + * 1. If the caller is unprivileged then <dom> must be DOMID_SELF. + * 2. <rdom> may be DOMID_SELF, allowing loopback connections. + */ +#define EVTCHNOP_alloc_unbound 6 +struct evtchn_alloc_unbound { + /* IN parameters */ + domid_t dom, remote_dom; + /* OUT parameters */ + evtchn_port_t port; +}; + +/* + * EVTCHNOP_bind_interdomain: Construct an interdomain event channel between + * the calling domain and <remote_dom>. <remote_dom,remote_port> must identify + * a port that is unbound and marked as accepting bindings from the calling + * domain. A fresh port is allocated in the calling domain and returned as + * <local_port>. + * NOTES: + * 2. <remote_dom> may be DOMID_SELF, allowing loopback connections. + */ +#define EVTCHNOP_bind_interdomain 0 +struct evtchn_bind_interdomain { + /* IN parameters. */ + domid_t remote_dom; + evtchn_port_t remote_port; + /* OUT parameters. */ + evtchn_port_t local_port; +}; + +/* + * EVTCHNOP_bind_virq: Bind a local event channel to VIRQ <irq> on specified + * vcpu. + * NOTES: + * 1. A virtual IRQ may be bound to at most one event channel per vcpu. + * 2. The allocated event channel is bound to the specified vcpu. The binding + * may not be changed. + */ +#define EVTCHNOP_bind_virq 1 +struct evtchn_bind_virq { + /* IN parameters. */ + uint32_t virq; + uint32_t vcpu; + /* OUT parameters. */ + evtchn_port_t port; +}; + +/* + * EVTCHNOP_bind_pirq: Bind a local event channel to PIRQ <irq>. + * NOTES: + * 1. A physical IRQ may be bound to at most one event channel per domain. + * 2. Only a sufficiently-privileged domain may bind to a physical IRQ. + */ +#define EVTCHNOP_bind_pirq 2 +struct evtchn_bind_pirq { + /* IN parameters. */ + uint32_t pirq; +#define BIND_PIRQ__WILL_SHARE 1 + uint32_t flags; /* BIND_PIRQ__* */ + /* OUT parameters. */ + evtchn_port_t port; +}; + +/* + * EVTCHNOP_bind_ipi: Bind a local event channel to receive events. + * NOTES: + * 1. The allocated event channel is bound to the specified vcpu. The binding + * may not be changed. + */ +#define EVTCHNOP_bind_ipi 7 +struct evtchn_bind_ipi { + uint32_t vcpu; + /* OUT parameters. */ + evtchn_port_t port; +}; + +/* + * EVTCHNOP_close: Close a local event channel <port>. If the channel is + * interdomain then the remote end is placed in the unbound state + * (EVTCHNSTAT_unbound), awaiting a new connection. + */ +#define EVTCHNOP_close 3 +struct evtchn_close { + /* IN parameters. */ + evtchn_port_t port; +}; + +/* + * EVTCHNOP_send: Send an event to the remote end of the channel whose local + * endpoint is <port>. + */ +#define EVTCHNOP_send 4 +struct evtchn_send { + /* IN parameters. */ + evtchn_port_t port; +}; + +/* + * EVTCHNOP_status: Get the current status of the communication channel which + * has an endpoint at <dom, port>. + * NOTES: + * 1. <dom> may be specified as DOMID_SELF. + * 2. Only a sufficiently-privileged domain may obtain the status of an event + * channel for which <dom> is not DOMID_SELF. + */ +#define EVTCHNOP_status 5 +struct evtchn_status { + /* IN parameters */ + domid_t dom; + evtchn_port_t port; + /* OUT parameters */ +#define EVTCHNSTAT_closed 0 /* Channel is not in use. */ +#define EVTCHNSTAT_unbound 1 /* Channel is waiting interdom connection.*/ +#define EVTCHNSTAT_interdomain 2 /* Channel is connected to remote domain. */ +#define EVTCHNSTAT_pirq 3 /* Channel is bound to a phys IRQ line. */ +#define EVTCHNSTAT_virq 4 /* Channel is bound to a virtual IRQ line */ +#define EVTCHNSTAT_ipi 5 /* Channel is bound to a virtual IPI line */ + uint32_t status; + uint32_t vcpu; /* VCPU to which this channel is bound. */ + union { + struct { + domid_t dom; + } unbound; /* EVTCHNSTAT_unbound */ + struct { + domid_t dom; + evtchn_port_t port; + } interdomain; /* EVTCHNSTAT_interdomain */ + uint32_t pirq; /* EVTCHNSTAT_pirq */ + uint32_t virq; /* EVTCHNSTAT_virq */ + } u; +}; + +/* + * EVTCHNOP_bind_vcpu: Specify which vcpu a channel should notify when an + * event is pending. + * NOTES: + * 1. IPI- and VIRQ-bound channels always notify the vcpu that initialised + * the binding. This binding cannot be changed. + * 2. All other channels notify vcpu0 by default. This default is set when + * the channel is allocated (a port that is freed and subsequently reused + * has its binding reset to vcpu0). + */ +#define EVTCHNOP_bind_vcpu 8 +struct evtchn_bind_vcpu { + /* IN parameters. */ + evtchn_port_t port; + uint32_t vcpu; +}; + +/* + * EVTCHNOP_unmask: Unmask the specified local event-channel port and deliver + * a notification to the appropriate VCPU if an event is pending. + */ +#define EVTCHNOP_unmask 9 +struct evtchn_unmask { + /* IN parameters. */ + evtchn_port_t port; +}; + +/* + * EVTCHNOP_reset: Close all event channels associated with specified domain. + * NOTES: + * 1. <dom> may be specified as DOMID_SELF. + * 2. Only a sufficiently-privileged domain may specify other than DOMID_SELF. + */ +#define EVTCHNOP_reset 10 +struct evtchn_reset { + /* IN parameters. */ + domid_t dom; +}; +typedef struct evtchn_reset evtchn_reset_t; + +/* + * EVTCHNOP_init_control: initialize the control block for the FIFO ABI. + */ +#define EVTCHNOP_init_control 11 +struct evtchn_init_control { + /* IN parameters. */ + uint64_t control_gfn; + uint32_t offset; + uint32_t vcpu; + /* OUT parameters. */ + uint8_t link_bits; + uint8_t _pad[7]; +}; + +/* + * EVTCHNOP_expand_array: add an additional page to the event array. + */ +#define EVTCHNOP_expand_array 12 +struct evtchn_expand_array { + /* IN parameters. */ + uint64_t array_gfn; +}; + +/* + * EVTCHNOP_set_priority: set the priority for an event channel. + */ +#define EVTCHNOP_set_priority 13 +struct evtchn_set_priority { + /* IN parameters. */ + uint32_t port; + uint32_t priority; +}; + +struct evtchn_op { + uint32_t cmd; /* EVTCHNOP_* */ + union { + struct evtchn_alloc_unbound alloc_unbound; + struct evtchn_bind_interdomain bind_interdomain; + struct evtchn_bind_virq bind_virq; + struct evtchn_bind_pirq bind_pirq; + struct evtchn_bind_ipi bind_ipi; + struct evtchn_close close; + struct evtchn_send send; + struct evtchn_status status; + struct evtchn_bind_vcpu bind_vcpu; + struct evtchn_unmask unmask; + } u; +}; +DEFINE_GUEST_HANDLE_STRUCT(evtchn_op); + +/* + * 2-level ABI + */ + +#define EVTCHN_2L_NR_CHANNELS (sizeof(xen_ulong_t) * sizeof(xen_ulong_t) * 64) + +/* + * FIFO ABI + */ + +/* Events may have priorities from 0 (highest) to 15 (lowest). */ +#define EVTCHN_FIFO_PRIORITY_MAX 0 +#define EVTCHN_FIFO_PRIORITY_DEFAULT 7 +#define EVTCHN_FIFO_PRIORITY_MIN 15 + +#define EVTCHN_FIFO_MAX_QUEUES (EVTCHN_FIFO_PRIORITY_MIN + 1) + +typedef uint32_t event_word_t; + +#define EVTCHN_FIFO_PENDING 31 +#define EVTCHN_FIFO_MASKED 30 +#define EVTCHN_FIFO_LINKED 29 +#define EVTCHN_FIFO_BUSY 28 + +#define EVTCHN_FIFO_LINK_BITS 17 +#define EVTCHN_FIFO_LINK_MASK ((1 << EVTCHN_FIFO_LINK_BITS) - 1) + +#define EVTCHN_FIFO_NR_CHANNELS (1 << EVTCHN_FIFO_LINK_BITS) + +struct evtchn_fifo_control_block { + uint32_t ready; + uint32_t _rsvd; + event_word_t head[EVTCHN_FIFO_MAX_QUEUES]; +}; + +#endif /* __XEN_PUBLIC_EVENT_CHANNEL_H__ */ diff --git a/kernel/include/xen/interface/features.h b/kernel/include/xen/interface/features.h new file mode 100644 index 000000000..6ad3d110b --- /dev/null +++ b/kernel/include/xen/interface/features.h @@ -0,0 +1,64 @@ +/****************************************************************************** + * features.h + * + * Feature flags, reported by XENVER_get_features. + * + * Copyright (c) 2006, Keir Fraser <keir@xensource.com> + */ + +#ifndef __XEN_PUBLIC_FEATURES_H__ +#define __XEN_PUBLIC_FEATURES_H__ + +/* + * If set, the guest does not need to write-protect its pagetables, and can + * update them via direct writes. + */ +#define XENFEAT_writable_page_tables 0 + +/* + * If set, the guest does not need to write-protect its segment descriptor + * tables, and can update them via direct writes. + */ +#define XENFEAT_writable_descriptor_tables 1 + +/* + * If set, translation between the guest's 'pseudo-physical' address space + * and the host's machine address space are handled by the hypervisor. In this + * mode the guest does not need to perform phys-to/from-machine translations + * when performing page table operations. + */ +#define XENFEAT_auto_translated_physmap 2 + +/* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */ +#define XENFEAT_supervisor_mode_kernel 3 + +/* + * If set, the guest does not need to allocate x86 PAE page directories + * below 4GB. This flag is usually implied by auto_translated_physmap. + */ +#define XENFEAT_pae_pgdir_above_4gb 4 + +/* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */ +#define XENFEAT_mmu_pt_update_preserve_ad 5 + +/* + * If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel + * available pte bits. + */ +#define XENFEAT_gnttab_map_avail_bits 7 + +/* x86: Does this Xen host support the HVM callback vector type? */ +#define XENFEAT_hvm_callback_vector 8 + +/* x86: pvclock algorithm is safe to use on HVM */ +#define XENFEAT_hvm_safe_pvclock 9 + +/* x86: pirq can be used by HVM guests */ +#define XENFEAT_hvm_pirqs 10 + +/* operation as Dom0 is supported */ +#define XENFEAT_dom0 11 + +#define XENFEAT_NR_SUBMAPS 1 + +#endif /* __XEN_PUBLIC_FEATURES_H__ */ diff --git a/kernel/include/xen/interface/grant_table.h b/kernel/include/xen/interface/grant_table.h new file mode 100644 index 000000000..56806bc90 --- /dev/null +++ b/kernel/include/xen/interface/grant_table.h @@ -0,0 +1,568 @@ +/****************************************************************************** + * grant_table.h + * + * Interface for granting foreign access to page frames, and receiving + * page-ownership transfers. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Copyright (c) 2004, K A Fraser + */ + +#ifndef __XEN_PUBLIC_GRANT_TABLE_H__ +#define __XEN_PUBLIC_GRANT_TABLE_H__ + +#include <xen/interface/xen.h> + +/*********************************** + * GRANT TABLE REPRESENTATION + */ + +/* Some rough guidelines on accessing and updating grant-table entries + * in a concurrency-safe manner. For more information, Linux contains a + * reference implementation for guest OSes (arch/xen/kernel/grant_table.c). + * + * NB. WMB is a no-op on current-generation x86 processors. However, a + * compiler barrier will still be required. + * + * Introducing a valid entry into the grant table: + * 1. Write ent->domid. + * 2. Write ent->frame: + * GTF_permit_access: Frame to which access is permitted. + * GTF_accept_transfer: Pseudo-phys frame slot being filled by new + * frame, or zero if none. + * 3. Write memory barrier (WMB). + * 4. Write ent->flags, inc. valid type. + * + * Invalidating an unused GTF_permit_access entry: + * 1. flags = ent->flags. + * 2. Observe that !(flags & (GTF_reading|GTF_writing)). + * 3. Check result of SMP-safe CMPXCHG(&ent->flags, flags, 0). + * NB. No need for WMB as reuse of entry is control-dependent on success of + * step 3, and all architectures guarantee ordering of ctrl-dep writes. + * + * Invalidating an in-use GTF_permit_access entry: + * This cannot be done directly. Request assistance from the domain controller + * which can set a timeout on the use of a grant entry and take necessary + * action. (NB. This is not yet implemented!). + * + * Invalidating an unused GTF_accept_transfer entry: + * 1. flags = ent->flags. + * 2. Observe that !(flags & GTF_transfer_committed). [*] + * 3. Check result of SMP-safe CMPXCHG(&ent->flags, flags, 0). + * NB. No need for WMB as reuse of entry is control-dependent on success of + * step 3, and all architectures guarantee ordering of ctrl-dep writes. + * [*] If GTF_transfer_committed is set then the grant entry is 'committed'. + * The guest must /not/ modify the grant entry until the address of the + * transferred frame is written. It is safe for the guest to spin waiting + * for this to occur (detect by observing GTF_transfer_completed in + * ent->flags). + * + * Invalidating a committed GTF_accept_transfer entry: + * 1. Wait for (ent->flags & GTF_transfer_completed). + * + * Changing a GTF_permit_access from writable to read-only: + * Use SMP-safe CMPXCHG to set GTF_readonly, while checking !GTF_writing. + * + * Changing a GTF_permit_access from read-only to writable: + * Use SMP-safe bit-setting instruction. + */ + +/* + * Reference to a grant entry in a specified domain's grant table. + */ +typedef uint32_t grant_ref_t; + +/* + * A grant table comprises a packed array of grant entries in one or more + * page frames shared between Xen and a guest. + * [XEN]: This field is written by Xen and read by the sharing guest. + * [GST]: This field is written by the guest and read by Xen. + */ + +/* + * Version 1 of the grant table entry structure is maintained purely + * for backwards compatibility. New guests should use version 2. + */ +struct grant_entry_v1 { + /* GTF_xxx: various type and flag information. [XEN,GST] */ + uint16_t flags; + /* The domain being granted foreign privileges. [GST] */ + domid_t domid; + /* + * GTF_permit_access: Frame that @domid is allowed to map and access. [GST] + * GTF_accept_transfer: Frame whose ownership transferred by @domid. [XEN] + */ + uint32_t frame; +}; + +/* + * Type of grant entry. + * GTF_invalid: This grant entry grants no privileges. + * GTF_permit_access: Allow @domid to map/access @frame. + * GTF_accept_transfer: Allow @domid to transfer ownership of one page frame + * to this guest. Xen writes the page number to @frame. + * GTF_transitive: Allow @domid to transitively access a subrange of + * @trans_grant in @trans_domid. No mappings are allowed. + */ +#define GTF_invalid (0U<<0) +#define GTF_permit_access (1U<<0) +#define GTF_accept_transfer (2U<<0) +#define GTF_transitive (3U<<0) +#define GTF_type_mask (3U<<0) + +/* + * Subflags for GTF_permit_access. + * GTF_readonly: Restrict @domid to read-only mappings and accesses. [GST] + * GTF_reading: Grant entry is currently mapped for reading by @domid. [XEN] + * GTF_writing: Grant entry is currently mapped for writing by @domid. [XEN] + * GTF_sub_page: Grant access to only a subrange of the page. @domid + * will only be allowed to copy from the grant, and not + * map it. [GST] + */ +#define _GTF_readonly (2) +#define GTF_readonly (1U<<_GTF_readonly) +#define _GTF_reading (3) +#define GTF_reading (1U<<_GTF_reading) +#define _GTF_writing (4) +#define GTF_writing (1U<<_GTF_writing) +#define _GTF_sub_page (8) +#define GTF_sub_page (1U<<_GTF_sub_page) + +/* + * Subflags for GTF_accept_transfer: + * GTF_transfer_committed: Xen sets this flag to indicate that it is committed + * to transferring ownership of a page frame. When a guest sees this flag + * it must /not/ modify the grant entry until GTF_transfer_completed is + * set by Xen. + * GTF_transfer_completed: It is safe for the guest to spin-wait on this flag + * after reading GTF_transfer_committed. Xen will always write the frame + * address, followed by ORing this flag, in a timely manner. + */ +#define _GTF_transfer_committed (2) +#define GTF_transfer_committed (1U<<_GTF_transfer_committed) +#define _GTF_transfer_completed (3) +#define GTF_transfer_completed (1U<<_GTF_transfer_completed) + +/* + * Version 2 grant table entries. These fulfil the same role as + * version 1 entries, but can represent more complicated operations. + * Any given domain will have either a version 1 or a version 2 table, + * and every entry in the table will be the same version. + * + * The interface by which domains use grant references does not depend + * on the grant table version in use by the other domain. + */ + +/* + * Version 1 and version 2 grant entries share a common prefix. The + * fields of the prefix are documented as part of struct + * grant_entry_v1. + */ +struct grant_entry_header { + uint16_t flags; + domid_t domid; +}; + +/* + * Version 2 of the grant entry structure, here is an union because three + * different types are suppotted: full_page, sub_page and transitive. + */ +union grant_entry_v2 { + struct grant_entry_header hdr; + + /* + * This member is used for V1-style full page grants, where either: + * + * -- hdr.type is GTF_accept_transfer, or + * -- hdr.type is GTF_permit_access and GTF_sub_page is not set. + * + * In that case, the frame field has the same semantics as the + * field of the same name in the V1 entry structure. + */ + struct { + struct grant_entry_header hdr; + uint32_t pad0; + uint64_t frame; + } full_page; + + /* + * If the grant type is GTF_grant_access and GTF_sub_page is set, + * @domid is allowed to access bytes [@page_off,@page_off+@length) + * in frame @frame. + */ + struct { + struct grant_entry_header hdr; + uint16_t page_off; + uint16_t length; + uint64_t frame; + } sub_page; + + /* + * If the grant is GTF_transitive, @domid is allowed to use the + * grant @gref in domain @trans_domid, as if it was the local + * domain. Obviously, the transitive access must be compatible + * with the original grant. + */ + struct { + struct grant_entry_header hdr; + domid_t trans_domid; + uint16_t pad0; + grant_ref_t gref; + } transitive; + + uint32_t __spacer[4]; /* Pad to a power of two */ +}; + +typedef uint16_t grant_status_t; + +/*********************************** + * GRANT TABLE QUERIES AND USES + */ + +/* + * Handle to track a mapping created via a grant reference. + */ +typedef uint32_t grant_handle_t; + +/* + * GNTTABOP_map_grant_ref: Map the grant entry (<dom>,<ref>) for access + * by devices and/or host CPUs. If successful, <handle> is a tracking number + * that must be presented later to destroy the mapping(s). On error, <handle> + * is a negative status code. + * NOTES: + * 1. If GNTMAP_device_map is specified then <dev_bus_addr> is the address + * via which I/O devices may access the granted frame. + * 2. If GNTMAP_host_map is specified then a mapping will be added at + * either a host virtual address in the current address space, or at + * a PTE at the specified machine address. The type of mapping to + * perform is selected through the GNTMAP_contains_pte flag, and the + * address is specified in <host_addr>. + * 3. Mappings should only be destroyed via GNTTABOP_unmap_grant_ref. If a + * host mapping is destroyed by other means then it is *NOT* guaranteed + * to be accounted to the correct grant reference! + */ +#define GNTTABOP_map_grant_ref 0 +struct gnttab_map_grant_ref { + /* IN parameters. */ + uint64_t host_addr; + uint32_t flags; /* GNTMAP_* */ + grant_ref_t ref; + domid_t dom; + /* OUT parameters. */ + int16_t status; /* GNTST_* */ + grant_handle_t handle; + uint64_t dev_bus_addr; +}; +DEFINE_GUEST_HANDLE_STRUCT(gnttab_map_grant_ref); + +/* + * GNTTABOP_unmap_grant_ref: Destroy one or more grant-reference mappings + * tracked by <handle>. If <host_addr> or <dev_bus_addr> is zero, that + * field is ignored. If non-zero, they must refer to a device/host mapping + * that is tracked by <handle> + * NOTES: + * 1. The call may fail in an undefined manner if either mapping is not + * tracked by <handle>. + * 3. After executing a batch of unmaps, it is guaranteed that no stale + * mappings will remain in the device or host TLBs. + */ +#define GNTTABOP_unmap_grant_ref 1 +struct gnttab_unmap_grant_ref { + /* IN parameters. */ + uint64_t host_addr; + uint64_t dev_bus_addr; + grant_handle_t handle; + /* OUT parameters. */ + int16_t status; /* GNTST_* */ +}; +DEFINE_GUEST_HANDLE_STRUCT(gnttab_unmap_grant_ref); + +/* + * GNTTABOP_setup_table: Set up a grant table for <dom> comprising at least + * <nr_frames> pages. The frame addresses are written to the <frame_list>. + * Only <nr_frames> addresses are written, even if the table is larger. + * NOTES: + * 1. <dom> may be specified as DOMID_SELF. + * 2. Only a sufficiently-privileged domain may specify <dom> != DOMID_SELF. + * 3. Xen may not support more than a single grant-table page per domain. + */ +#define GNTTABOP_setup_table 2 +struct gnttab_setup_table { + /* IN parameters. */ + domid_t dom; + uint32_t nr_frames; + /* OUT parameters. */ + int16_t status; /* GNTST_* */ + GUEST_HANDLE(xen_pfn_t) frame_list; +}; +DEFINE_GUEST_HANDLE_STRUCT(gnttab_setup_table); + +/* + * GNTTABOP_dump_table: Dump the contents of the grant table to the + * xen console. Debugging use only. + */ +#define GNTTABOP_dump_table 3 +struct gnttab_dump_table { + /* IN parameters. */ + domid_t dom; + /* OUT parameters. */ + int16_t status; /* GNTST_* */ +}; +DEFINE_GUEST_HANDLE_STRUCT(gnttab_dump_table); + +/* + * GNTTABOP_transfer_grant_ref: Transfer <frame> to a foreign domain. The + * foreign domain has previously registered its interest in the transfer via + * <domid, ref>. + * + * Note that, even if the transfer fails, the specified page no longer belongs + * to the calling domain *unless* the error is GNTST_bad_page. + */ +#define GNTTABOP_transfer 4 +struct gnttab_transfer { + /* IN parameters. */ + xen_pfn_t mfn; + domid_t domid; + grant_ref_t ref; + /* OUT parameters. */ + int16_t status; +}; +DEFINE_GUEST_HANDLE_STRUCT(gnttab_transfer); + +/* + * GNTTABOP_copy: Hypervisor based copy + * source and destinations can be eithers MFNs or, for foreign domains, + * grant references. the foreign domain has to grant read/write access + * in its grant table. + * + * The flags specify what type source and destinations are (either MFN + * or grant reference). + * + * Note that this can also be used to copy data between two domains + * via a third party if the source and destination domains had previously + * grant appropriate access to their pages to the third party. + * + * source_offset specifies an offset in the source frame, dest_offset + * the offset in the target frame and len specifies the number of + * bytes to be copied. + */ + +#define _GNTCOPY_source_gref (0) +#define GNTCOPY_source_gref (1<<_GNTCOPY_source_gref) +#define _GNTCOPY_dest_gref (1) +#define GNTCOPY_dest_gref (1<<_GNTCOPY_dest_gref) + +#define GNTTABOP_copy 5 +struct gnttab_copy { + /* IN parameters. */ + struct { + union { + grant_ref_t ref; + xen_pfn_t gmfn; + } u; + domid_t domid; + uint16_t offset; + } source, dest; + uint16_t len; + uint16_t flags; /* GNTCOPY_* */ + /* OUT parameters. */ + int16_t status; +}; +DEFINE_GUEST_HANDLE_STRUCT(gnttab_copy); + +/* + * GNTTABOP_query_size: Query the current and maximum sizes of the shared + * grant table. + * NOTES: + * 1. <dom> may be specified as DOMID_SELF. + * 2. Only a sufficiently-privileged domain may specify <dom> != DOMID_SELF. + */ +#define GNTTABOP_query_size 6 +struct gnttab_query_size { + /* IN parameters. */ + domid_t dom; + /* OUT parameters. */ + uint32_t nr_frames; + uint32_t max_nr_frames; + int16_t status; /* GNTST_* */ +}; +DEFINE_GUEST_HANDLE_STRUCT(gnttab_query_size); + +/* + * GNTTABOP_unmap_and_replace: Destroy one or more grant-reference mappings + * tracked by <handle> but atomically replace the page table entry with one + * pointing to the machine address under <new_addr>. <new_addr> will be + * redirected to the null entry. + * NOTES: + * 1. The call may fail in an undefined manner if either mapping is not + * tracked by <handle>. + * 2. After executing a batch of unmaps, it is guaranteed that no stale + * mappings will remain in the device or host TLBs. + */ +#define GNTTABOP_unmap_and_replace 7 +struct gnttab_unmap_and_replace { + /* IN parameters. */ + uint64_t host_addr; + uint64_t new_addr; + grant_handle_t handle; + /* OUT parameters. */ + int16_t status; /* GNTST_* */ +}; +DEFINE_GUEST_HANDLE_STRUCT(gnttab_unmap_and_replace); + +/* + * GNTTABOP_set_version: Request a particular version of the grant + * table shared table structure. This operation can only be performed + * once in any given domain. It must be performed before any grants + * are activated; otherwise, the domain will be stuck with version 1. + * The only defined versions are 1 and 2. + */ +#define GNTTABOP_set_version 8 +struct gnttab_set_version { + /* IN parameters */ + uint32_t version; +}; +DEFINE_GUEST_HANDLE_STRUCT(gnttab_set_version); + +/* + * GNTTABOP_get_status_frames: Get the list of frames used to store grant + * status for <dom>. In grant format version 2, the status is separated + * from the other shared grant fields to allow more efficient synchronization + * using barriers instead of atomic cmpexch operations. + * <nr_frames> specify the size of vector <frame_list>. + * The frame addresses are returned in the <frame_list>. + * Only <nr_frames> addresses are returned, even if the table is larger. + * NOTES: + * 1. <dom> may be specified as DOMID_SELF. + * 2. Only a sufficiently-privileged domain may specify <dom> != DOMID_SELF. + */ +#define GNTTABOP_get_status_frames 9 +struct gnttab_get_status_frames { + /* IN parameters. */ + uint32_t nr_frames; + domid_t dom; + /* OUT parameters. */ + int16_t status; /* GNTST_* */ + GUEST_HANDLE(uint64_t) frame_list; +}; +DEFINE_GUEST_HANDLE_STRUCT(gnttab_get_status_frames); + +/* + * GNTTABOP_get_version: Get the grant table version which is in + * effect for domain <dom>. + */ +#define GNTTABOP_get_version 10 +struct gnttab_get_version { + /* IN parameters */ + domid_t dom; + uint16_t pad; + /* OUT parameters */ + uint32_t version; +}; +DEFINE_GUEST_HANDLE_STRUCT(gnttab_get_version); + +/* + * Issue one or more cache maintenance operations on a portion of a + * page granted to the calling domain by a foreign domain. + */ +#define GNTTABOP_cache_flush 12 +struct gnttab_cache_flush { + union { + uint64_t dev_bus_addr; + grant_ref_t ref; + } a; + uint16_t offset; /* offset from start of grant */ + uint16_t length; /* size within the grant */ +#define GNTTAB_CACHE_CLEAN (1<<0) +#define GNTTAB_CACHE_INVAL (1<<1) +#define GNTTAB_CACHE_SOURCE_GREF (1<<31) + uint32_t op; +}; +DEFINE_GUEST_HANDLE_STRUCT(gnttab_cache_flush); + +/* + * Bitfield values for update_pin_status.flags. + */ + /* Map the grant entry for access by I/O devices. */ +#define _GNTMAP_device_map (0) +#define GNTMAP_device_map (1<<_GNTMAP_device_map) + /* Map the grant entry for access by host CPUs. */ +#define _GNTMAP_host_map (1) +#define GNTMAP_host_map (1<<_GNTMAP_host_map) + /* Accesses to the granted frame will be restricted to read-only access. */ +#define _GNTMAP_readonly (2) +#define GNTMAP_readonly (1<<_GNTMAP_readonly) + /* + * GNTMAP_host_map subflag: + * 0 => The host mapping is usable only by the guest OS. + * 1 => The host mapping is usable by guest OS + current application. + */ +#define _GNTMAP_application_map (3) +#define GNTMAP_application_map (1<<_GNTMAP_application_map) + + /* + * GNTMAP_contains_pte subflag: + * 0 => This map request contains a host virtual address. + * 1 => This map request contains the machine addess of the PTE to update. + */ +#define _GNTMAP_contains_pte (4) +#define GNTMAP_contains_pte (1<<_GNTMAP_contains_pte) + +/* + * Bits to be placed in guest kernel available PTE bits (architecture + * dependent; only supported when XENFEAT_gnttab_map_avail_bits is set). + */ +#define _GNTMAP_guest_avail0 (16) +#define GNTMAP_guest_avail_mask ((uint32_t)~0 << _GNTMAP_guest_avail0) + +/* + * Values for error status returns. All errors are -ve. + */ +#define GNTST_okay (0) /* Normal return. */ +#define GNTST_general_error (-1) /* General undefined error. */ +#define GNTST_bad_domain (-2) /* Unrecognsed domain id. */ +#define GNTST_bad_gntref (-3) /* Unrecognised or inappropriate gntref. */ +#define GNTST_bad_handle (-4) /* Unrecognised or inappropriate handle. */ +#define GNTST_bad_virt_addr (-5) /* Inappropriate virtual address to map. */ +#define GNTST_bad_dev_addr (-6) /* Inappropriate device address to unmap.*/ +#define GNTST_no_device_space (-7) /* Out of space in I/O MMU. */ +#define GNTST_permission_denied (-8) /* Not enough privilege for operation. */ +#define GNTST_bad_page (-9) /* Specified page was invalid for op. */ +#define GNTST_bad_copy_arg (-10) /* copy arguments cross page boundary. */ +#define GNTST_address_too_big (-11) /* transfer page address too large. */ +#define GNTST_eagain (-12) /* Operation not done; try again. */ + +#define GNTTABOP_error_msgs { \ + "okay", \ + "undefined error", \ + "unrecognised domain id", \ + "invalid grant reference", \ + "invalid mapping handle", \ + "invalid virtual address", \ + "invalid device address", \ + "no spare translation slot in the I/O MMU", \ + "permission denied", \ + "bad page", \ + "copy arguments cross page boundary", \ + "page address size too large", \ + "operation not done; try again" \ +} + +#endif /* __XEN_PUBLIC_GRANT_TABLE_H__ */ diff --git a/kernel/include/xen/interface/hvm/hvm_op.h b/kernel/include/xen/interface/hvm/hvm_op.h new file mode 100644 index 000000000..956a04682 --- /dev/null +++ b/kernel/include/xen/interface/hvm/hvm_op.h @@ -0,0 +1,65 @@ +/* + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#ifndef __XEN_PUBLIC_HVM_HVM_OP_H__ +#define __XEN_PUBLIC_HVM_HVM_OP_H__ + +/* Get/set subcommands: the second argument of the hypercall is a + * pointer to a xen_hvm_param struct. */ +#define HVMOP_set_param 0 +#define HVMOP_get_param 1 +struct xen_hvm_param { + domid_t domid; /* IN */ + uint32_t index; /* IN */ + uint64_t value; /* IN/OUT */ +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_hvm_param); + +/* Hint from PV drivers for pagetable destruction. */ +#define HVMOP_pagetable_dying 9 +struct xen_hvm_pagetable_dying { + /* Domain with a pagetable about to be destroyed. */ + domid_t domid; + /* guest physical address of the toplevel pagetable dying */ + aligned_u64 gpa; +}; +typedef struct xen_hvm_pagetable_dying xen_hvm_pagetable_dying_t; +DEFINE_GUEST_HANDLE_STRUCT(xen_hvm_pagetable_dying_t); + +enum hvmmem_type_t { + HVMMEM_ram_rw, /* Normal read/write guest RAM */ + HVMMEM_ram_ro, /* Read-only; writes are discarded */ + HVMMEM_mmio_dm, /* Reads and write go to the device model */ +}; + +#define HVMOP_get_mem_type 15 +/* Return hvmmem_type_t for the specified pfn. */ +struct xen_hvm_get_mem_type { + /* Domain to be queried. */ + domid_t domid; + /* OUT variable. */ + uint16_t mem_type; + uint16_t pad[2]; /* align next field on 8-byte boundary */ + /* IN variable. */ + uint64_t pfn; +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_hvm_get_mem_type); + +#endif /* __XEN_PUBLIC_HVM_HVM_OP_H__ */ diff --git a/kernel/include/xen/interface/hvm/params.h b/kernel/include/xen/interface/hvm/params.h new file mode 100644 index 000000000..a6c79911e --- /dev/null +++ b/kernel/include/xen/interface/hvm/params.h @@ -0,0 +1,99 @@ +/* + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#ifndef __XEN_PUBLIC_HVM_PARAMS_H__ +#define __XEN_PUBLIC_HVM_PARAMS_H__ + +#include <xen/interface/hvm/hvm_op.h> + +/* + * Parameter space for HVMOP_{set,get}_param. + */ + +/* + * How should CPU0 event-channel notifications be delivered? + * val[63:56] == 0: val[55:0] is a delivery GSI (Global System Interrupt). + * val[63:56] == 1: val[55:0] is a delivery PCI INTx line, as follows: + * Domain = val[47:32], Bus = val[31:16], + * DevFn = val[15: 8], IntX = val[ 1: 0] + * val[63:56] == 2: val[7:0] is a vector number. + * If val == 0 then CPU0 event-channel notifications are not delivered. + */ +#define HVM_PARAM_CALLBACK_IRQ 0 + +#define HVM_PARAM_STORE_PFN 1 +#define HVM_PARAM_STORE_EVTCHN 2 + +#define HVM_PARAM_PAE_ENABLED 4 + +#define HVM_PARAM_IOREQ_PFN 5 + +#define HVM_PARAM_BUFIOREQ_PFN 6 + +/* + * Set mode for virtual timers (currently x86 only): + * delay_for_missed_ticks (default): + * Do not advance a vcpu's time beyond the correct delivery time for + * interrupts that have been missed due to preemption. Deliver missed + * interrupts when the vcpu is rescheduled and advance the vcpu's virtual + * time stepwise for each one. + * no_delay_for_missed_ticks: + * As above, missed interrupts are delivered, but guest time always tracks + * wallclock (i.e., real) time while doing so. + * no_missed_ticks_pending: + * No missed interrupts are held pending. Instead, to ensure ticks are + * delivered at some non-zero rate, if we detect missed ticks then the + * internal tick alarm is not disabled if the VCPU is preempted during the + * next tick period. + * one_missed_tick_pending: + * Missed interrupts are collapsed together and delivered as one 'late tick'. + * Guest time always tracks wallclock (i.e., real) time. + */ +#define HVM_PARAM_TIMER_MODE 10 +#define HVMPTM_delay_for_missed_ticks 0 +#define HVMPTM_no_delay_for_missed_ticks 1 +#define HVMPTM_no_missed_ticks_pending 2 +#define HVMPTM_one_missed_tick_pending 3 + +/* Boolean: Enable virtual HPET (high-precision event timer)? (x86-only) */ +#define HVM_PARAM_HPET_ENABLED 11 + +/* Identity-map page directory used by Intel EPT when CR0.PG=0. */ +#define HVM_PARAM_IDENT_PT 12 + +/* Device Model domain, defaults to 0. */ +#define HVM_PARAM_DM_DOMAIN 13 + +/* ACPI S state: currently support S0 and S3 on x86. */ +#define HVM_PARAM_ACPI_S_STATE 14 + +/* TSS used on Intel when CR0.PE=0. */ +#define HVM_PARAM_VM86_TSS 15 + +/* Boolean: Enable aligning all periodic vpts to reduce interrupts */ +#define HVM_PARAM_VPT_ALIGN 16 + +/* Console debug shared memory ring and event channel */ +#define HVM_PARAM_CONSOLE_PFN 17 +#define HVM_PARAM_CONSOLE_EVTCHN 18 + +#define HVM_NR_PARAMS 19 + +#endif /* __XEN_PUBLIC_HVM_PARAMS_H__ */ diff --git a/kernel/include/xen/interface/io/blkif.h b/kernel/include/xen/interface/io/blkif.h new file mode 100644 index 000000000..c33e1c489 --- /dev/null +++ b/kernel/include/xen/interface/io/blkif.h @@ -0,0 +1,253 @@ +/****************************************************************************** + * blkif.h + * + * Unified block-device I/O interface for Xen guest OSes. + * + * Copyright (c) 2003-2004, Keir Fraser + */ + +#ifndef __XEN_PUBLIC_IO_BLKIF_H__ +#define __XEN_PUBLIC_IO_BLKIF_H__ + +#include <xen/interface/io/ring.h> +#include <xen/interface/grant_table.h> + +/* + * Front->back notifications: When enqueuing a new request, sending a + * notification can be made conditional on req_event (i.e., the generic + * hold-off mechanism provided by the ring macros). Backends must set + * req_event appropriately (e.g., using RING_FINAL_CHECK_FOR_REQUESTS()). + * + * Back->front notifications: When enqueuing a new response, sending a + * notification can be made conditional on rsp_event (i.e., the generic + * hold-off mechanism provided by the ring macros). Frontends must set + * rsp_event appropriately (e.g., using RING_FINAL_CHECK_FOR_RESPONSES()). + */ + +typedef uint16_t blkif_vdev_t; +typedef uint64_t blkif_sector_t; + +/* + * REQUEST CODES. + */ +#define BLKIF_OP_READ 0 +#define BLKIF_OP_WRITE 1 +/* + * Recognised only if "feature-barrier" is present in backend xenbus info. + * The "feature_barrier" node contains a boolean indicating whether barrier + * requests are likely to succeed or fail. Either way, a barrier request + * may fail at any time with BLKIF_RSP_EOPNOTSUPP if it is unsupported by + * the underlying block-device hardware. The boolean simply indicates whether + * or not it is worthwhile for the frontend to attempt barrier requests. + * If a backend does not recognise BLKIF_OP_WRITE_BARRIER, it should *not* + * create the "feature-barrier" node! + */ +#define BLKIF_OP_WRITE_BARRIER 2 + +/* + * Recognised if "feature-flush-cache" is present in backend xenbus + * info. A flush will ask the underlying storage hardware to flush its + * non-volatile caches as appropriate. The "feature-flush-cache" node + * contains a boolean indicating whether flush requests are likely to + * succeed or fail. Either way, a flush request may fail at any time + * with BLKIF_RSP_EOPNOTSUPP if it is unsupported by the underlying + * block-device hardware. The boolean simply indicates whether or not it + * is worthwhile for the frontend to attempt flushes. If a backend does + * not recognise BLKIF_OP_WRITE_FLUSH_CACHE, it should *not* create the + * "feature-flush-cache" node! + */ +#define BLKIF_OP_FLUSH_DISKCACHE 3 + +/* + * Recognised only if "feature-discard" is present in backend xenbus info. + * The "feature-discard" node contains a boolean indicating whether trim + * (ATA) or unmap (SCSI) - conviently called discard requests are likely + * to succeed or fail. Either way, a discard request + * may fail at any time with BLKIF_RSP_EOPNOTSUPP if it is unsupported by + * the underlying block-device hardware. The boolean simply indicates whether + * or not it is worthwhile for the frontend to attempt discard requests. + * If a backend does not recognise BLKIF_OP_DISCARD, it should *not* + * create the "feature-discard" node! + * + * Discard operation is a request for the underlying block device to mark + * extents to be erased. However, discard does not guarantee that the blocks + * will be erased from the device - it is just a hint to the device + * controller that these blocks are no longer in use. What the device + * controller does with that information is left to the controller. + * Discard operations are passed with sector_number as the + * sector index to begin discard operations at and nr_sectors as the number of + * sectors to be discarded. The specified sectors should be discarded if the + * underlying block device supports trim (ATA) or unmap (SCSI) operations, + * or a BLKIF_RSP_EOPNOTSUPP should be returned. + * More information about trim/unmap operations at: + * http://t13.org/Documents/UploadedDocuments/docs2008/ + * e07154r6-Data_Set_Management_Proposal_for_ATA-ACS2.doc + * http://www.seagate.com/staticfiles/support/disc/manuals/ + * Interface%20manuals/100293068c.pdf + * The backend can optionally provide three extra XenBus attributes to + * further optimize the discard functionality: + * 'discard-alignment' - Devices that support discard functionality may + * internally allocate space in units that are bigger than the exported + * logical block size. The discard-alignment parameter indicates how many bytes + * the beginning of the partition is offset from the internal allocation unit's + * natural alignment. + * 'discard-granularity' - Devices that support discard functionality may + * internally allocate space using units that are bigger than the logical block + * size. The discard-granularity parameter indicates the size of the internal + * allocation unit in bytes if reported by the device. Otherwise the + * discard-granularity will be set to match the device's physical block size. + * 'discard-secure' - All copies of the discarded sectors (potentially created + * by garbage collection) must also be erased. To use this feature, the flag + * BLKIF_DISCARD_SECURE must be set in the blkif_request_trim. + */ +#define BLKIF_OP_DISCARD 5 + +/* + * Recognized if "feature-max-indirect-segments" in present in the backend + * xenbus info. The "feature-max-indirect-segments" node contains the maximum + * number of segments allowed by the backend per request. If the node is + * present, the frontend might use blkif_request_indirect structs in order to + * issue requests with more than BLKIF_MAX_SEGMENTS_PER_REQUEST (11). The + * maximum number of indirect segments is fixed by the backend, but the + * frontend can issue requests with any number of indirect segments as long as + * it's less than the number provided by the backend. The indirect_grefs field + * in blkif_request_indirect should be filled by the frontend with the + * grant references of the pages that are holding the indirect segments. + * These pages are filled with an array of blkif_request_segment that hold the + * information about the segments. The number of indirect pages to use is + * determined by the number of segments an indirect request contains. Every + * indirect page can contain a maximum of + * (PAGE_SIZE / sizeof(struct blkif_request_segment)) segments, so to + * calculate the number of indirect pages to use we have to do + * ceil(indirect_segments / (PAGE_SIZE / sizeof(struct blkif_request_segment))). + * + * If a backend does not recognize BLKIF_OP_INDIRECT, it should *not* + * create the "feature-max-indirect-segments" node! + */ +#define BLKIF_OP_INDIRECT 6 + +/* + * Maximum scatter/gather segments per request. + * This is carefully chosen so that sizeof(struct blkif_ring) <= PAGE_SIZE. + * NB. This could be 12 if the ring indexes weren't stored in the same page. + */ +#define BLKIF_MAX_SEGMENTS_PER_REQUEST 11 + +#define BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST 8 + +struct blkif_request_segment { + grant_ref_t gref; /* reference to I/O buffer frame */ + /* @first_sect: first sector in frame to transfer (inclusive). */ + /* @last_sect: last sector in frame to transfer (inclusive). */ + uint8_t first_sect, last_sect; +}; + +struct blkif_request_rw { + uint8_t nr_segments; /* number of segments */ + blkif_vdev_t handle; /* only for read/write requests */ +#ifndef CONFIG_X86_32 + uint32_t _pad1; /* offsetof(blkif_request,u.rw.id) == 8 */ +#endif + uint64_t id; /* private guest value, echoed in resp */ + blkif_sector_t sector_number;/* start sector idx on disk (r/w only) */ + struct blkif_request_segment seg[BLKIF_MAX_SEGMENTS_PER_REQUEST]; +} __attribute__((__packed__)); + +struct blkif_request_discard { + uint8_t flag; /* BLKIF_DISCARD_SECURE or zero. */ +#define BLKIF_DISCARD_SECURE (1<<0) /* ignored if discard-secure=0 */ + blkif_vdev_t _pad1; /* only for read/write requests */ +#ifndef CONFIG_X86_32 + uint32_t _pad2; /* offsetof(blkif_req..,u.discard.id)==8*/ +#endif + uint64_t id; /* private guest value, echoed in resp */ + blkif_sector_t sector_number; + uint64_t nr_sectors; + uint8_t _pad3; +} __attribute__((__packed__)); + +struct blkif_request_other { + uint8_t _pad1; + blkif_vdev_t _pad2; /* only for read/write requests */ +#ifndef CONFIG_X86_32 + uint32_t _pad3; /* offsetof(blkif_req..,u.other.id)==8*/ +#endif + uint64_t id; /* private guest value, echoed in resp */ +} __attribute__((__packed__)); + +struct blkif_request_indirect { + uint8_t indirect_op; + uint16_t nr_segments; +#ifndef CONFIG_X86_32 + uint32_t _pad1; /* offsetof(blkif_...,u.indirect.id) == 8 */ +#endif + uint64_t id; + blkif_sector_t sector_number; + blkif_vdev_t handle; + uint16_t _pad2; + grant_ref_t indirect_grefs[BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST]; +#ifndef CONFIG_X86_32 + uint32_t _pad3; /* make it 64 byte aligned */ +#else + uint64_t _pad3; /* make it 64 byte aligned */ +#endif +} __attribute__((__packed__)); + +struct blkif_request { + uint8_t operation; /* BLKIF_OP_??? */ + union { + struct blkif_request_rw rw; + struct blkif_request_discard discard; + struct blkif_request_other other; + struct blkif_request_indirect indirect; + } u; +} __attribute__((__packed__)); + +struct blkif_response { + uint64_t id; /* copied from request */ + uint8_t operation; /* copied from request */ + int16_t status; /* BLKIF_RSP_??? */ +}; + +/* + * STATUS RETURN CODES. + */ + /* Operation not supported (only happens on barrier writes). */ +#define BLKIF_RSP_EOPNOTSUPP -2 + /* Operation failed for some unspecified reason (-EIO). */ +#define BLKIF_RSP_ERROR -1 + /* Operation completed successfully. */ +#define BLKIF_RSP_OKAY 0 + +/* + * Generate blkif ring structures and types. + */ + +DEFINE_RING_TYPES(blkif, struct blkif_request, struct blkif_response); + +#define VDISK_CDROM 0x1 +#define VDISK_REMOVABLE 0x2 +#define VDISK_READONLY 0x4 + +/* Xen-defined major numbers for virtual disks, they look strangely + * familiar */ +#define XEN_IDE0_MAJOR 3 +#define XEN_IDE1_MAJOR 22 +#define XEN_SCSI_DISK0_MAJOR 8 +#define XEN_SCSI_DISK1_MAJOR 65 +#define XEN_SCSI_DISK2_MAJOR 66 +#define XEN_SCSI_DISK3_MAJOR 67 +#define XEN_SCSI_DISK4_MAJOR 68 +#define XEN_SCSI_DISK5_MAJOR 69 +#define XEN_SCSI_DISK6_MAJOR 70 +#define XEN_SCSI_DISK7_MAJOR 71 +#define XEN_SCSI_DISK8_MAJOR 128 +#define XEN_SCSI_DISK9_MAJOR 129 +#define XEN_SCSI_DISK10_MAJOR 130 +#define XEN_SCSI_DISK11_MAJOR 131 +#define XEN_SCSI_DISK12_MAJOR 132 +#define XEN_SCSI_DISK13_MAJOR 133 +#define XEN_SCSI_DISK14_MAJOR 134 +#define XEN_SCSI_DISK15_MAJOR 135 + +#endif /* __XEN_PUBLIC_IO_BLKIF_H__ */ diff --git a/kernel/include/xen/interface/io/console.h b/kernel/include/xen/interface/io/console.h new file mode 100644 index 000000000..e563de70f --- /dev/null +++ b/kernel/include/xen/interface/io/console.h @@ -0,0 +1,23 @@ +/****************************************************************************** + * console.h + * + * Console I/O interface for Xen guest OSes. + * + * Copyright (c) 2005, Keir Fraser + */ + +#ifndef __XEN_PUBLIC_IO_CONSOLE_H__ +#define __XEN_PUBLIC_IO_CONSOLE_H__ + +typedef uint32_t XENCONS_RING_IDX; + +#define MASK_XENCONS_IDX(idx, ring) ((idx) & (sizeof(ring)-1)) + +struct xencons_interface { + char in[1024]; + char out[2048]; + XENCONS_RING_IDX in_cons, in_prod; + XENCONS_RING_IDX out_cons, out_prod; +}; + +#endif /* __XEN_PUBLIC_IO_CONSOLE_H__ */ diff --git a/kernel/include/xen/interface/io/fbif.h b/kernel/include/xen/interface/io/fbif.h new file mode 100644 index 000000000..974a51ed9 --- /dev/null +++ b/kernel/include/xen/interface/io/fbif.h @@ -0,0 +1,143 @@ +/* + * fbif.h -- Xen virtual frame buffer device + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com> + * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@redhat.com> + */ + +#ifndef __XEN_PUBLIC_IO_FBIF_H__ +#define __XEN_PUBLIC_IO_FBIF_H__ + +/* Out events (frontend -> backend) */ + +/* + * Out events may be sent only when requested by backend, and receipt + * of an unknown out event is an error. + */ + +/* Event type 1 currently not used */ +/* + * Framebuffer update notification event + * Capable frontend sets feature-update in xenstore. + * Backend requests it by setting request-update in xenstore. + */ +#define XENFB_TYPE_UPDATE 2 + +struct xenfb_update { + uint8_t type; /* XENFB_TYPE_UPDATE */ + int32_t x; /* source x */ + int32_t y; /* source y */ + int32_t width; /* rect width */ + int32_t height; /* rect height */ +}; + +/* + * Framebuffer resize notification event + * Capable backend sets feature-resize in xenstore. + */ +#define XENFB_TYPE_RESIZE 3 + +struct xenfb_resize { + uint8_t type; /* XENFB_TYPE_RESIZE */ + int32_t width; /* width in pixels */ + int32_t height; /* height in pixels */ + int32_t stride; /* stride in bytes */ + int32_t depth; /* depth in bits */ + int32_t offset; /* start offset within framebuffer */ +}; + +#define XENFB_OUT_EVENT_SIZE 40 + +union xenfb_out_event { + uint8_t type; + struct xenfb_update update; + struct xenfb_resize resize; + char pad[XENFB_OUT_EVENT_SIZE]; +}; + +/* In events (backend -> frontend) */ + +/* + * Frontends should ignore unknown in events. + * No in events currently defined. + */ + +#define XENFB_IN_EVENT_SIZE 40 + +union xenfb_in_event { + uint8_t type; + char pad[XENFB_IN_EVENT_SIZE]; +}; + +/* shared page */ + +#define XENFB_IN_RING_SIZE 1024 +#define XENFB_IN_RING_LEN (XENFB_IN_RING_SIZE / XENFB_IN_EVENT_SIZE) +#define XENFB_IN_RING_OFFS 1024 +#define XENFB_IN_RING(page) \ + ((union xenfb_in_event *)((char *)(page) + XENFB_IN_RING_OFFS)) +#define XENFB_IN_RING_REF(page, idx) \ + (XENFB_IN_RING((page))[(idx) % XENFB_IN_RING_LEN]) + +#define XENFB_OUT_RING_SIZE 2048 +#define XENFB_OUT_RING_LEN (XENFB_OUT_RING_SIZE / XENFB_OUT_EVENT_SIZE) +#define XENFB_OUT_RING_OFFS (XENFB_IN_RING_OFFS + XENFB_IN_RING_SIZE) +#define XENFB_OUT_RING(page) \ + ((union xenfb_out_event *)((char *)(page) + XENFB_OUT_RING_OFFS)) +#define XENFB_OUT_RING_REF(page, idx) \ + (XENFB_OUT_RING((page))[(idx) % XENFB_OUT_RING_LEN]) + +struct xenfb_page { + uint32_t in_cons, in_prod; + uint32_t out_cons, out_prod; + + int32_t width; /* width of the framebuffer (in pixels) */ + int32_t height; /* height of the framebuffer (in pixels) */ + uint32_t line_length; /* length of a row of pixels (in bytes) */ + uint32_t mem_length; /* length of the framebuffer (in bytes) */ + uint8_t depth; /* depth of a pixel (in bits) */ + + /* + * Framebuffer page directory + * + * Each directory page holds PAGE_SIZE / sizeof(*pd) + * framebuffer pages, and can thus map up to PAGE_SIZE * + * PAGE_SIZE / sizeof(*pd) bytes. With PAGE_SIZE == 4096 and + * sizeof(unsigned long) == 4/8, that's 4 Megs 32 bit and 2 + * Megs 64 bit. 256 directories give enough room for a 512 + * Meg framebuffer with a max resolution of 12,800x10,240. + * Should be enough for a while with room leftover for + * expansion. + */ + unsigned long pd[256]; +}; + +/* + * Wart: xenkbd needs to know default resolution. Put it here until a + * better solution is found, but don't leak it to the backend. + */ +#ifdef __KERNEL__ +#define XENFB_WIDTH 800 +#define XENFB_HEIGHT 600 +#define XENFB_DEPTH 32 +#endif + +#endif diff --git a/kernel/include/xen/interface/io/kbdif.h b/kernel/include/xen/interface/io/kbdif.h new file mode 100644 index 000000000..8066c7849 --- /dev/null +++ b/kernel/include/xen/interface/io/kbdif.h @@ -0,0 +1,116 @@ +/* + * kbdif.h -- Xen virtual keyboard/mouse + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com> + * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@redhat.com> + */ + +#ifndef __XEN_PUBLIC_IO_KBDIF_H__ +#define __XEN_PUBLIC_IO_KBDIF_H__ + +/* In events (backend -> frontend) */ + +/* + * Frontends should ignore unknown in events. + */ + +/* Pointer movement event */ +#define XENKBD_TYPE_MOTION 1 +/* Event type 2 currently not used */ +/* Key event (includes pointer buttons) */ +#define XENKBD_TYPE_KEY 3 +/* + * Pointer position event + * Capable backend sets feature-abs-pointer in xenstore. + * Frontend requests ot instead of XENKBD_TYPE_MOTION by setting + * request-abs-update in xenstore. + */ +#define XENKBD_TYPE_POS 4 + +struct xenkbd_motion { + uint8_t type; /* XENKBD_TYPE_MOTION */ + int32_t rel_x; /* relative X motion */ + int32_t rel_y; /* relative Y motion */ + int32_t rel_z; /* relative Z motion (wheel) */ +}; + +struct xenkbd_key { + uint8_t type; /* XENKBD_TYPE_KEY */ + uint8_t pressed; /* 1 if pressed; 0 otherwise */ + uint32_t keycode; /* KEY_* from linux/input.h */ +}; + +struct xenkbd_position { + uint8_t type; /* XENKBD_TYPE_POS */ + int32_t abs_x; /* absolute X position (in FB pixels) */ + int32_t abs_y; /* absolute Y position (in FB pixels) */ + int32_t rel_z; /* relative Z motion (wheel) */ +}; + +#define XENKBD_IN_EVENT_SIZE 40 + +union xenkbd_in_event { + uint8_t type; + struct xenkbd_motion motion; + struct xenkbd_key key; + struct xenkbd_position pos; + char pad[XENKBD_IN_EVENT_SIZE]; +}; + +/* Out events (frontend -> backend) */ + +/* + * Out events may be sent only when requested by backend, and receipt + * of an unknown out event is an error. + * No out events currently defined. + */ + +#define XENKBD_OUT_EVENT_SIZE 40 + +union xenkbd_out_event { + uint8_t type; + char pad[XENKBD_OUT_EVENT_SIZE]; +}; + +/* shared page */ + +#define XENKBD_IN_RING_SIZE 2048 +#define XENKBD_IN_RING_LEN (XENKBD_IN_RING_SIZE / XENKBD_IN_EVENT_SIZE) +#define XENKBD_IN_RING_OFFS 1024 +#define XENKBD_IN_RING(page) \ + ((union xenkbd_in_event *)((char *)(page) + XENKBD_IN_RING_OFFS)) +#define XENKBD_IN_RING_REF(page, idx) \ + (XENKBD_IN_RING((page))[(idx) % XENKBD_IN_RING_LEN]) + +#define XENKBD_OUT_RING_SIZE 1024 +#define XENKBD_OUT_RING_LEN (XENKBD_OUT_RING_SIZE / XENKBD_OUT_EVENT_SIZE) +#define XENKBD_OUT_RING_OFFS (XENKBD_IN_RING_OFFS + XENKBD_IN_RING_SIZE) +#define XENKBD_OUT_RING(page) \ + ((union xenkbd_out_event *)((char *)(page) + XENKBD_OUT_RING_OFFS)) +#define XENKBD_OUT_RING_REF(page, idx) \ + (XENKBD_OUT_RING((page))[(idx) % XENKBD_OUT_RING_LEN]) + +struct xenkbd_page { + uint32_t in_cons, in_prod; + uint32_t out_cons, out_prod; +}; + +#endif diff --git a/kernel/include/xen/interface/io/netif.h b/kernel/include/xen/interface/io/netif.h new file mode 100644 index 000000000..70054cc07 --- /dev/null +++ b/kernel/include/xen/interface/io/netif.h @@ -0,0 +1,262 @@ +/****************************************************************************** + * netif.h + * + * Unified network-device I/O interface for Xen guest OSes. + * + * Copyright (c) 2003-2004, Keir Fraser + */ + +#ifndef __XEN_PUBLIC_IO_NETIF_H__ +#define __XEN_PUBLIC_IO_NETIF_H__ + +#include <xen/interface/io/ring.h> +#include <xen/interface/grant_table.h> + +/* + * Older implementation of Xen network frontend / backend has an + * implicit dependency on the MAX_SKB_FRAGS as the maximum number of + * ring slots a skb can use. Netfront / netback may not work as + * expected when frontend and backend have different MAX_SKB_FRAGS. + * + * A better approach is to add mechanism for netfront / netback to + * negotiate this value. However we cannot fix all possible + * frontends, so we need to define a value which states the minimum + * slots backend must support. + * + * The minimum value derives from older Linux kernel's MAX_SKB_FRAGS + * (18), which is proved to work with most frontends. Any new backend + * which doesn't negotiate with frontend should expect frontend to + * send a valid packet using slots up to this value. + */ +#define XEN_NETIF_NR_SLOTS_MIN 18 + +/* + * Notifications after enqueuing any type of message should be conditional on + * the appropriate req_event or rsp_event field in the shared ring. + * If the client sends notification for rx requests then it should specify + * feature 'feature-rx-notify' via xenbus. Otherwise the backend will assume + * that it cannot safely queue packets (as it may not be kicked to send them). + */ + + /* + * "feature-split-event-channels" is introduced to separate guest TX + * and RX notificaion. Backend either doesn't support this feature or + * advertise it via xenstore as 0 (disabled) or 1 (enabled). + * + * To make use of this feature, frontend should allocate two event + * channels for TX and RX, advertise them to backend as + * "event-channel-tx" and "event-channel-rx" respectively. If frontend + * doesn't want to use this feature, it just writes "event-channel" + * node as before. + */ + +/* + * Multiple transmit and receive queues: + * If supported, the backend will write the key "multi-queue-max-queues" to + * the directory for that vif, and set its value to the maximum supported + * number of queues. + * Frontends that are aware of this feature and wish to use it can write the + * key "multi-queue-num-queues", set to the number they wish to use, which + * must be greater than zero, and no more than the value reported by the backend + * in "multi-queue-max-queues". + * + * Queues replicate the shared rings and event channels. + * "feature-split-event-channels" may optionally be used when using + * multiple queues, but is not mandatory. + * + * Each queue consists of one shared ring pair, i.e. there must be the same + * number of tx and rx rings. + * + * For frontends requesting just one queue, the usual event-channel and + * ring-ref keys are written as before, simplifying the backend processing + * to avoid distinguishing between a frontend that doesn't understand the + * multi-queue feature, and one that does, but requested only one queue. + * + * Frontends requesting two or more queues must not write the toplevel + * event-channel (or event-channel-{tx,rx}) and {tx,rx}-ring-ref keys, + * instead writing those keys under sub-keys having the name "queue-N" where + * N is the integer ID of the queue for which those keys belong. Queues + * are indexed from zero. For example, a frontend with two queues and split + * event channels must write the following set of queue-related keys: + * + * /local/domain/1/device/vif/0/multi-queue-num-queues = "2" + * /local/domain/1/device/vif/0/queue-0 = "" + * /local/domain/1/device/vif/0/queue-0/tx-ring-ref = "<ring-ref-tx0>" + * /local/domain/1/device/vif/0/queue-0/rx-ring-ref = "<ring-ref-rx0>" + * /local/domain/1/device/vif/0/queue-0/event-channel-tx = "<evtchn-tx0>" + * /local/domain/1/device/vif/0/queue-0/event-channel-rx = "<evtchn-rx0>" + * /local/domain/1/device/vif/0/queue-1 = "" + * /local/domain/1/device/vif/0/queue-1/tx-ring-ref = "<ring-ref-tx1>" + * /local/domain/1/device/vif/0/queue-1/rx-ring-ref = "<ring-ref-rx1" + * /local/domain/1/device/vif/0/queue-1/event-channel-tx = "<evtchn-tx1>" + * /local/domain/1/device/vif/0/queue-1/event-channel-rx = "<evtchn-rx1>" + * + * If there is any inconsistency in the XenStore data, the backend may + * choose not to connect any queues, instead treating the request as an + * error. This includes scenarios where more (or fewer) queues were + * requested than the frontend provided details for. + * + * Mapping of packets to queues is considered to be a function of the + * transmitting system (backend or frontend) and is not negotiated + * between the two. Guests are free to transmit packets on any queue + * they choose, provided it has been set up correctly. Guests must be + * prepared to receive packets on any queue they have requested be set up. + */ + +/* + * "feature-no-csum-offload" should be used to turn IPv4 TCP/UDP checksum + * offload off or on. If it is missing then the feature is assumed to be on. + * "feature-ipv6-csum-offload" should be used to turn IPv6 TCP/UDP checksum + * offload on or off. If it is missing then the feature is assumed to be off. + */ + +/* + * "feature-gso-tcpv4" and "feature-gso-tcpv6" advertise the capability to + * handle large TCP packets (in IPv4 or IPv6 form respectively). Neither + * frontends nor backends are assumed to be capable unless the flags are + * present. + */ + +/* + * This is the 'wire' format for packets: + * Request 1: xen_netif_tx_request -- XEN_NETTXF_* (any flags) + * [Request 2: xen_netif_extra_info] (only if request 1 has XEN_NETTXF_extra_info) + * [Request 3: xen_netif_extra_info] (only if request 2 has XEN_NETIF_EXTRA_MORE) + * Request 4: xen_netif_tx_request -- XEN_NETTXF_more_data + * Request 5: xen_netif_tx_request -- XEN_NETTXF_more_data + * ... + * Request N: xen_netif_tx_request -- 0 + */ + +/* Protocol checksum field is blank in the packet (hardware offload)? */ +#define _XEN_NETTXF_csum_blank (0) +#define XEN_NETTXF_csum_blank (1U<<_XEN_NETTXF_csum_blank) + +/* Packet data has been validated against protocol checksum. */ +#define _XEN_NETTXF_data_validated (1) +#define XEN_NETTXF_data_validated (1U<<_XEN_NETTXF_data_validated) + +/* Packet continues in the next request descriptor. */ +#define _XEN_NETTXF_more_data (2) +#define XEN_NETTXF_more_data (1U<<_XEN_NETTXF_more_data) + +/* Packet to be followed by extra descriptor(s). */ +#define _XEN_NETTXF_extra_info (3) +#define XEN_NETTXF_extra_info (1U<<_XEN_NETTXF_extra_info) + +#define XEN_NETIF_MAX_TX_SIZE 0xFFFF +struct xen_netif_tx_request { + grant_ref_t gref; /* Reference to buffer page */ + uint16_t offset; /* Offset within buffer page */ + uint16_t flags; /* XEN_NETTXF_* */ + uint16_t id; /* Echoed in response message. */ + uint16_t size; /* Packet size in bytes. */ +}; + +/* Types of xen_netif_extra_info descriptors. */ +#define XEN_NETIF_EXTRA_TYPE_NONE (0) /* Never used - invalid */ +#define XEN_NETIF_EXTRA_TYPE_GSO (1) /* u.gso */ +#define XEN_NETIF_EXTRA_TYPE_MAX (2) + +/* xen_netif_extra_info flags. */ +#define _XEN_NETIF_EXTRA_FLAG_MORE (0) +#define XEN_NETIF_EXTRA_FLAG_MORE (1U<<_XEN_NETIF_EXTRA_FLAG_MORE) + +/* GSO types */ +#define XEN_NETIF_GSO_TYPE_NONE (0) +#define XEN_NETIF_GSO_TYPE_TCPV4 (1) +#define XEN_NETIF_GSO_TYPE_TCPV6 (2) + +/* + * This structure needs to fit within both netif_tx_request and + * netif_rx_response for compatibility. + */ +struct xen_netif_extra_info { + uint8_t type; /* XEN_NETIF_EXTRA_TYPE_* */ + uint8_t flags; /* XEN_NETIF_EXTRA_FLAG_* */ + + union { + struct { + /* + * Maximum payload size of each segment. For + * example, for TCP this is just the path MSS. + */ + uint16_t size; + + /* + * GSO type. This determines the protocol of + * the packet and any extra features required + * to segment the packet properly. + */ + uint8_t type; /* XEN_NETIF_GSO_TYPE_* */ + + /* Future expansion. */ + uint8_t pad; + + /* + * GSO features. This specifies any extra GSO + * features required to process this packet, + * such as ECN support for TCPv4. + */ + uint16_t features; /* XEN_NETIF_GSO_FEAT_* */ + } gso; + + uint16_t pad[3]; + } u; +}; + +struct xen_netif_tx_response { + uint16_t id; + int16_t status; /* XEN_NETIF_RSP_* */ +}; + +struct xen_netif_rx_request { + uint16_t id; /* Echoed in response message. */ + grant_ref_t gref; /* Reference to incoming granted frame */ +}; + +/* Packet data has been validated against protocol checksum. */ +#define _XEN_NETRXF_data_validated (0) +#define XEN_NETRXF_data_validated (1U<<_XEN_NETRXF_data_validated) + +/* Protocol checksum field is blank in the packet (hardware offload)? */ +#define _XEN_NETRXF_csum_blank (1) +#define XEN_NETRXF_csum_blank (1U<<_XEN_NETRXF_csum_blank) + +/* Packet continues in the next request descriptor. */ +#define _XEN_NETRXF_more_data (2) +#define XEN_NETRXF_more_data (1U<<_XEN_NETRXF_more_data) + +/* Packet to be followed by extra descriptor(s). */ +#define _XEN_NETRXF_extra_info (3) +#define XEN_NETRXF_extra_info (1U<<_XEN_NETRXF_extra_info) + +/* GSO Prefix descriptor. */ +#define _XEN_NETRXF_gso_prefix (4) +#define XEN_NETRXF_gso_prefix (1U<<_XEN_NETRXF_gso_prefix) + +struct xen_netif_rx_response { + uint16_t id; + uint16_t offset; /* Offset in page of start of received packet */ + uint16_t flags; /* XEN_NETRXF_* */ + int16_t status; /* -ve: BLKIF_RSP_* ; +ve: Rx'ed pkt size. */ +}; + +/* + * Generate netif ring structures and types. + */ + +DEFINE_RING_TYPES(xen_netif_tx, + struct xen_netif_tx_request, + struct xen_netif_tx_response); +DEFINE_RING_TYPES(xen_netif_rx, + struct xen_netif_rx_request, + struct xen_netif_rx_response); + +#define XEN_NETIF_RSP_DROPPED -2 +#define XEN_NETIF_RSP_ERROR -1 +#define XEN_NETIF_RSP_OKAY 0 +/* No response: used for auxiliary requests (e.g., xen_netif_extra_info). */ +#define XEN_NETIF_RSP_NULL 1 + +#endif diff --git a/kernel/include/xen/interface/io/pciif.h b/kernel/include/xen/interface/io/pciif.h new file mode 100644 index 000000000..d9922ae36 --- /dev/null +++ b/kernel/include/xen/interface/io/pciif.h @@ -0,0 +1,112 @@ +/* + * PCI Backend/Frontend Common Data Structures & Macros + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Author: Ryan Wilson <hap9@epoch.ncsc.mil> + */ +#ifndef __XEN_PCI_COMMON_H__ +#define __XEN_PCI_COMMON_H__ + +/* Be sure to bump this number if you change this file */ +#define XEN_PCI_MAGIC "7" + +/* xen_pci_sharedinfo flags */ +#define _XEN_PCIF_active (0) +#define XEN_PCIF_active (1<<_XEN_PCIF_active) +#define _XEN_PCIB_AERHANDLER (1) +#define XEN_PCIB_AERHANDLER (1<<_XEN_PCIB_AERHANDLER) +#define _XEN_PCIB_active (2) +#define XEN_PCIB_active (1<<_XEN_PCIB_active) + +/* xen_pci_op commands */ +#define XEN_PCI_OP_conf_read (0) +#define XEN_PCI_OP_conf_write (1) +#define XEN_PCI_OP_enable_msi (2) +#define XEN_PCI_OP_disable_msi (3) +#define XEN_PCI_OP_enable_msix (4) +#define XEN_PCI_OP_disable_msix (5) +#define XEN_PCI_OP_aer_detected (6) +#define XEN_PCI_OP_aer_resume (7) +#define XEN_PCI_OP_aer_mmio (8) +#define XEN_PCI_OP_aer_slotreset (9) + +/* xen_pci_op error numbers */ +#define XEN_PCI_ERR_success (0) +#define XEN_PCI_ERR_dev_not_found (-1) +#define XEN_PCI_ERR_invalid_offset (-2) +#define XEN_PCI_ERR_access_denied (-3) +#define XEN_PCI_ERR_not_implemented (-4) +/* XEN_PCI_ERR_op_failed - backend failed to complete the operation */ +#define XEN_PCI_ERR_op_failed (-5) + +/* + * it should be PAGE_SIZE-sizeof(struct xen_pci_op))/sizeof(struct msix_entry)) + * Should not exceed 128 + */ +#define SH_INFO_MAX_VEC 128 + +struct xen_msix_entry { + uint16_t vector; + uint16_t entry; +}; +struct xen_pci_op { + /* IN: what action to perform: XEN_PCI_OP_* */ + uint32_t cmd; + + /* OUT: will contain an error number (if any) from errno.h */ + int32_t err; + + /* IN: which device to touch */ + uint32_t domain; /* PCI Domain/Segment */ + uint32_t bus; + uint32_t devfn; + + /* IN: which configuration registers to touch */ + int32_t offset; + int32_t size; + + /* IN/OUT: Contains the result after a READ or the value to WRITE */ + uint32_t value; + /* IN: Contains extra infor for this operation */ + uint32_t info; + /*IN: param for msi-x */ + struct xen_msix_entry msix_entries[SH_INFO_MAX_VEC]; +}; + +/*used for pcie aer handling*/ +struct xen_pcie_aer_op { + /* IN: what action to perform: XEN_PCI_OP_* */ + uint32_t cmd; + /*IN/OUT: return aer_op result or carry error_detected state as input*/ + int32_t err; + + /* IN: which device to touch */ + uint32_t domain; /* PCI Domain/Segment*/ + uint32_t bus; + uint32_t devfn; +}; +struct xen_pci_sharedinfo { + /* flags - XEN_PCIF_* */ + uint32_t flags; + struct xen_pci_op op; + struct xen_pcie_aer_op aer_op; +}; + +#endif /* __XEN_PCI_COMMON_H__ */ diff --git a/kernel/include/xen/interface/io/protocols.h b/kernel/include/xen/interface/io/protocols.h new file mode 100644 index 000000000..545a14ba0 --- /dev/null +++ b/kernel/include/xen/interface/io/protocols.h @@ -0,0 +1,21 @@ +#ifndef __XEN_PROTOCOLS_H__ +#define __XEN_PROTOCOLS_H__ + +#define XEN_IO_PROTO_ABI_X86_32 "x86_32-abi" +#define XEN_IO_PROTO_ABI_X86_64 "x86_64-abi" +#define XEN_IO_PROTO_ABI_POWERPC64 "powerpc64-abi" +#define XEN_IO_PROTO_ABI_ARM "arm-abi" + +#if defined(__i386__) +# define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_X86_32 +#elif defined(__x86_64__) +# define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_X86_64 +#elif defined(__powerpc64__) +# define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_POWERPC64 +#elif defined(__arm__) || defined(__aarch64__) +# define XEN_IO_PROTO_ABI_NATIVE XEN_IO_PROTO_ABI_ARM +#else +# error arch fixup needed here +#endif + +#endif diff --git a/kernel/include/xen/interface/io/ring.h b/kernel/include/xen/interface/io/ring.h new file mode 100644 index 000000000..7d28aff60 --- /dev/null +++ b/kernel/include/xen/interface/io/ring.h @@ -0,0 +1,272 @@ +/****************************************************************************** + * ring.h + * + * Shared producer-consumer ring macros. + * + * Tim Deegan and Andrew Warfield November 2004. + */ + +#ifndef __XEN_PUBLIC_IO_RING_H__ +#define __XEN_PUBLIC_IO_RING_H__ + +typedef unsigned int RING_IDX; + +/* Round a 32-bit unsigned constant down to the nearest power of two. */ +#define __RD2(_x) (((_x) & 0x00000002) ? 0x2 : ((_x) & 0x1)) +#define __RD4(_x) (((_x) & 0x0000000c) ? __RD2((_x)>>2)<<2 : __RD2(_x)) +#define __RD8(_x) (((_x) & 0x000000f0) ? __RD4((_x)>>4)<<4 : __RD4(_x)) +#define __RD16(_x) (((_x) & 0x0000ff00) ? __RD8((_x)>>8)<<8 : __RD8(_x)) +#define __RD32(_x) (((_x) & 0xffff0000) ? __RD16((_x)>>16)<<16 : __RD16(_x)) + +/* + * Calculate size of a shared ring, given the total available space for the + * ring and indexes (_sz), and the name tag of the request/response structure. + * A ring contains as many entries as will fit, rounded down to the nearest + * power of two (so we can mask with (size-1) to loop around). + */ +#define __CONST_RING_SIZE(_s, _sz) \ + (__RD32(((_sz) - offsetof(struct _s##_sring, ring)) / \ + sizeof(((struct _s##_sring *)0)->ring[0]))) + +/* + * The same for passing in an actual pointer instead of a name tag. + */ +#define __RING_SIZE(_s, _sz) \ + (__RD32(((_sz) - (long)&(_s)->ring + (long)(_s)) / sizeof((_s)->ring[0]))) + +/* + * Macros to make the correct C datatypes for a new kind of ring. + * + * To make a new ring datatype, you need to have two message structures, + * let's say struct request, and struct response already defined. + * + * In a header where you want the ring datatype declared, you then do: + * + * DEFINE_RING_TYPES(mytag, struct request, struct response); + * + * These expand out to give you a set of types, as you can see below. + * The most important of these are: + * + * struct mytag_sring - The shared ring. + * struct mytag_front_ring - The 'front' half of the ring. + * struct mytag_back_ring - The 'back' half of the ring. + * + * To initialize a ring in your code you need to know the location and size + * of the shared memory area (PAGE_SIZE, for instance). To initialise + * the front half: + * + * struct mytag_front_ring front_ring; + * SHARED_RING_INIT((struct mytag_sring *)shared_page); + * FRONT_RING_INIT(&front_ring, (struct mytag_sring *)shared_page, + * PAGE_SIZE); + * + * Initializing the back follows similarly (note that only the front + * initializes the shared ring): + * + * struct mytag_back_ring back_ring; + * BACK_RING_INIT(&back_ring, (struct mytag_sring *)shared_page, + * PAGE_SIZE); + */ + +#define DEFINE_RING_TYPES(__name, __req_t, __rsp_t) \ + \ +/* Shared ring entry */ \ +union __name##_sring_entry { \ + __req_t req; \ + __rsp_t rsp; \ +}; \ + \ +/* Shared ring page */ \ +struct __name##_sring { \ + RING_IDX req_prod, req_event; \ + RING_IDX rsp_prod, rsp_event; \ + uint8_t pad[48]; \ + union __name##_sring_entry ring[1]; /* variable-length */ \ +}; \ + \ +/* "Front" end's private variables */ \ +struct __name##_front_ring { \ + RING_IDX req_prod_pvt; \ + RING_IDX rsp_cons; \ + unsigned int nr_ents; \ + struct __name##_sring *sring; \ +}; \ + \ +/* "Back" end's private variables */ \ +struct __name##_back_ring { \ + RING_IDX rsp_prod_pvt; \ + RING_IDX req_cons; \ + unsigned int nr_ents; \ + struct __name##_sring *sring; \ +}; + +/* + * Macros for manipulating rings. + * + * FRONT_RING_whatever works on the "front end" of a ring: here + * requests are pushed on to the ring and responses taken off it. + * + * BACK_RING_whatever works on the "back end" of a ring: here + * requests are taken off the ring and responses put on. + * + * N.B. these macros do NO INTERLOCKS OR FLOW CONTROL. + * This is OK in 1-for-1 request-response situations where the + * requestor (front end) never has more than RING_SIZE()-1 + * outstanding requests. + */ + +/* Initialising empty rings */ +#define SHARED_RING_INIT(_s) do { \ + (_s)->req_prod = (_s)->rsp_prod = 0; \ + (_s)->req_event = (_s)->rsp_event = 1; \ + memset((_s)->pad, 0, sizeof((_s)->pad)); \ +} while(0) + +#define FRONT_RING_INIT(_r, _s, __size) do { \ + (_r)->req_prod_pvt = 0; \ + (_r)->rsp_cons = 0; \ + (_r)->nr_ents = __RING_SIZE(_s, __size); \ + (_r)->sring = (_s); \ +} while (0) + +#define BACK_RING_INIT(_r, _s, __size) do { \ + (_r)->rsp_prod_pvt = 0; \ + (_r)->req_cons = 0; \ + (_r)->nr_ents = __RING_SIZE(_s, __size); \ + (_r)->sring = (_s); \ +} while (0) + +/* Initialize to existing shared indexes -- for recovery */ +#define FRONT_RING_ATTACH(_r, _s, __size) do { \ + (_r)->sring = (_s); \ + (_r)->req_prod_pvt = (_s)->req_prod; \ + (_r)->rsp_cons = (_s)->rsp_prod; \ + (_r)->nr_ents = __RING_SIZE(_s, __size); \ +} while (0) + +#define BACK_RING_ATTACH(_r, _s, __size) do { \ + (_r)->sring = (_s); \ + (_r)->rsp_prod_pvt = (_s)->rsp_prod; \ + (_r)->req_cons = (_s)->req_prod; \ + (_r)->nr_ents = __RING_SIZE(_s, __size); \ +} while (0) + +/* How big is this ring? */ +#define RING_SIZE(_r) \ + ((_r)->nr_ents) + +/* Number of free requests (for use on front side only). */ +#define RING_FREE_REQUESTS(_r) \ + (RING_SIZE(_r) - ((_r)->req_prod_pvt - (_r)->rsp_cons)) + +/* Test if there is an empty slot available on the front ring. + * (This is only meaningful from the front. ) + */ +#define RING_FULL(_r) \ + (RING_FREE_REQUESTS(_r) == 0) + +/* Test if there are outstanding messages to be processed on a ring. */ +#define RING_HAS_UNCONSUMED_RESPONSES(_r) \ + ((_r)->sring->rsp_prod - (_r)->rsp_cons) + +#define RING_HAS_UNCONSUMED_REQUESTS(_r) \ + ({ \ + unsigned int req = (_r)->sring->req_prod - (_r)->req_cons; \ + unsigned int rsp = RING_SIZE(_r) - \ + ((_r)->req_cons - (_r)->rsp_prod_pvt); \ + req < rsp ? req : rsp; \ + }) + +/* Direct access to individual ring elements, by index. */ +#define RING_GET_REQUEST(_r, _idx) \ + (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].req)) + +#define RING_GET_RESPONSE(_r, _idx) \ + (&((_r)->sring->ring[((_idx) & (RING_SIZE(_r) - 1))].rsp)) + +/* Loop termination condition: Would the specified index overflow the ring? */ +#define RING_REQUEST_CONS_OVERFLOW(_r, _cons) \ + (((_cons) - (_r)->rsp_prod_pvt) >= RING_SIZE(_r)) + +/* Ill-behaved frontend determination: Can there be this many requests? */ +#define RING_REQUEST_PROD_OVERFLOW(_r, _prod) \ + (((_prod) - (_r)->rsp_prod_pvt) > RING_SIZE(_r)) + + +#define RING_PUSH_REQUESTS(_r) do { \ + wmb(); /* back sees requests /before/ updated producer index */ \ + (_r)->sring->req_prod = (_r)->req_prod_pvt; \ +} while (0) + +#define RING_PUSH_RESPONSES(_r) do { \ + wmb(); /* front sees responses /before/ updated producer index */ \ + (_r)->sring->rsp_prod = (_r)->rsp_prod_pvt; \ +} while (0) + +/* + * Notification hold-off (req_event and rsp_event): + * + * When queueing requests or responses on a shared ring, it may not always be + * necessary to notify the remote end. For example, if requests are in flight + * in a backend, the front may be able to queue further requests without + * notifying the back (if the back checks for new requests when it queues + * responses). + * + * When enqueuing requests or responses: + * + * Use RING_PUSH_{REQUESTS,RESPONSES}_AND_CHECK_NOTIFY(). The second argument + * is a boolean return value. True indicates that the receiver requires an + * asynchronous notification. + * + * After dequeuing requests or responses (before sleeping the connection): + * + * Use RING_FINAL_CHECK_FOR_REQUESTS() or RING_FINAL_CHECK_FOR_RESPONSES(). + * The second argument is a boolean return value. True indicates that there + * are pending messages on the ring (i.e., the connection should not be put + * to sleep). + * + * These macros will set the req_event/rsp_event field to trigger a + * notification on the very next message that is enqueued. If you want to + * create batches of work (i.e., only receive a notification after several + * messages have been enqueued) then you will need to create a customised + * version of the FINAL_CHECK macro in your own code, which sets the event + * field appropriately. + */ + +#define RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(_r, _notify) do { \ + RING_IDX __old = (_r)->sring->req_prod; \ + RING_IDX __new = (_r)->req_prod_pvt; \ + wmb(); /* back sees requests /before/ updated producer index */ \ + (_r)->sring->req_prod = __new; \ + mb(); /* back sees new requests /before/ we check req_event */ \ + (_notify) = ((RING_IDX)(__new - (_r)->sring->req_event) < \ + (RING_IDX)(__new - __old)); \ +} while (0) + +#define RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(_r, _notify) do { \ + RING_IDX __old = (_r)->sring->rsp_prod; \ + RING_IDX __new = (_r)->rsp_prod_pvt; \ + wmb(); /* front sees responses /before/ updated producer index */ \ + (_r)->sring->rsp_prod = __new; \ + mb(); /* front sees new responses /before/ we check rsp_event */ \ + (_notify) = ((RING_IDX)(__new - (_r)->sring->rsp_event) < \ + (RING_IDX)(__new - __old)); \ +} while (0) + +#define RING_FINAL_CHECK_FOR_REQUESTS(_r, _work_to_do) do { \ + (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \ + if (_work_to_do) break; \ + (_r)->sring->req_event = (_r)->req_cons + 1; \ + mb(); \ + (_work_to_do) = RING_HAS_UNCONSUMED_REQUESTS(_r); \ +} while (0) + +#define RING_FINAL_CHECK_FOR_RESPONSES(_r, _work_to_do) do { \ + (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \ + if (_work_to_do) break; \ + (_r)->sring->rsp_event = (_r)->rsp_cons + 1; \ + mb(); \ + (_work_to_do) = RING_HAS_UNCONSUMED_RESPONSES(_r); \ +} while (0) + +#endif /* __XEN_PUBLIC_IO_RING_H__ */ diff --git a/kernel/include/xen/interface/io/tpmif.h b/kernel/include/xen/interface/io/tpmif.h new file mode 100644 index 000000000..28e7dcd75 --- /dev/null +++ b/kernel/include/xen/interface/io/tpmif.h @@ -0,0 +1,52 @@ +/****************************************************************************** + * tpmif.h + * + * TPM I/O interface for Xen guest OSes, v2 + * + * This file is in the public domain. + * + */ + +#ifndef __XEN_PUBLIC_IO_TPMIF_H__ +#define __XEN_PUBLIC_IO_TPMIF_H__ + +/* + * Xenbus state machine + * + * Device open: + * 1. Both ends start in XenbusStateInitialising + * 2. Backend transitions to InitWait (frontend does not wait on this step) + * 3. Frontend populates ring-ref, event-channel, feature-protocol-v2 + * 4. Frontend transitions to Initialised + * 5. Backend maps grant and event channel, verifies feature-protocol-v2 + * 6. Backend transitions to Connected + * 7. Frontend verifies feature-protocol-v2, transitions to Connected + * + * Device close: + * 1. State is changed to XenbusStateClosing + * 2. Frontend transitions to Closed + * 3. Backend unmaps grant and event, changes state to InitWait + */ + +enum vtpm_shared_page_state { + VTPM_STATE_IDLE, /* no contents / vTPM idle / cancel complete */ + VTPM_STATE_SUBMIT, /* request ready / vTPM working */ + VTPM_STATE_FINISH, /* response ready / vTPM idle */ + VTPM_STATE_CANCEL, /* cancel requested / vTPM working */ +}; +/* The backend should only change state to IDLE or FINISH, while the + * frontend should only change to SUBMIT or CANCEL. */ + + +struct vtpm_shared_page { + uint32_t length; /* request/response length in bytes */ + + uint8_t state; /* enum vtpm_shared_page_state */ + uint8_t locality; /* for the current request */ + uint8_t pad; + + uint8_t nr_extra_pages; /* extra pages for long packets; may be zero */ + uint32_t extra_pages[0]; /* grant IDs; length in nr_extra_pages */ +}; + +#endif diff --git a/kernel/include/xen/interface/io/vscsiif.h b/kernel/include/xen/interface/io/vscsiif.h new file mode 100644 index 000000000..d07d7aca8 --- /dev/null +++ b/kernel/include/xen/interface/io/vscsiif.h @@ -0,0 +1,229 @@ +/****************************************************************************** + * vscsiif.h + * + * Based on the blkif.h code. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Copyright(c) FUJITSU Limited 2008. + */ + +#ifndef __XEN__PUBLIC_IO_SCSI_H__ +#define __XEN__PUBLIC_IO_SCSI_H__ + +#include "ring.h" +#include "../grant_table.h" + +/* + * Feature and Parameter Negotiation + * ================================= + * The two halves of a Xen pvSCSI driver utilize nodes within the XenStore to + * communicate capabilities and to negotiate operating parameters. This + * section enumerates these nodes which reside in the respective front and + * backend portions of the XenStore, following the XenBus convention. + * + * Any specified default value is in effect if the corresponding XenBus node + * is not present in the XenStore. + * + * XenStore nodes in sections marked "PRIVATE" are solely for use by the + * driver side whose XenBus tree contains them. + * + ***************************************************************************** + * Backend XenBus Nodes + ***************************************************************************** + * + *------------------ Backend Device Identification (PRIVATE) ------------------ + * + * p-devname + * Values: string + * + * A free string used to identify the physical device (e.g. a disk name). + * + * p-dev + * Values: string + * + * A string specifying the backend device: either a 4-tuple "h:c:t:l" + * (host, controller, target, lun, all integers), or a WWN (e.g. + * "naa.60014054ac780582"). + * + * v-dev + * Values: string + * + * A string specifying the frontend device in form of a 4-tuple "h:c:t:l" + * (host, controller, target, lun, all integers). + * + *--------------------------------- Features --------------------------------- + * + * feature-sg-grant + * Values: unsigned [VSCSIIF_SG_TABLESIZE...65535] + * Default Value: 0 + * + * Specifies the maximum number of scatter/gather elements in grant pages + * supported. If not set, the backend supports up to VSCSIIF_SG_TABLESIZE + * SG elements specified directly in the request. + * + ***************************************************************************** + * Frontend XenBus Nodes + ***************************************************************************** + * + *----------------------- Request Transport Parameters ----------------------- + * + * event-channel + * Values: unsigned + * + * The identifier of the Xen event channel used to signal activity + * in the ring buffer. + * + * ring-ref + * Values: unsigned + * + * The Xen grant reference granting permission for the backend to map + * the sole page in a single page sized ring buffer. + * + * protocol + * Values: string (XEN_IO_PROTO_ABI_*) + * Default Value: XEN_IO_PROTO_ABI_NATIVE + * + * The machine ABI rules governing the format of all ring request and + * response structures. + */ + +/* Requests from the frontend to the backend */ + +/* + * Request a SCSI operation specified via a CDB in vscsiif_request.cmnd. + * The target is specified via channel, id and lun. + * + * The operation to be performed is specified via a CDB in cmnd[], the length + * of the CDB is in cmd_len. sc_data_direction specifies the direction of data + * (to the device, from the device, or none at all). + * + * If data is to be transferred to or from the device the buffer(s) in the + * guest memory is/are specified via one or multiple scsiif_request_segment + * descriptors each specifying a memory page via a grant_ref_t, a offset into + * the page and the length of the area in that page. All scsiif_request_segment + * areas concatenated form the resulting data buffer used by the operation. + * If the number of scsiif_request_segment areas is not too large (less than + * or equal VSCSIIF_SG_TABLESIZE) the areas can be specified directly in the + * seg[] array and the number of valid scsiif_request_segment elements is to be + * set in nr_segments. + * + * If "feature-sg-grant" in the Xenstore is set it is possible to specify more + * than VSCSIIF_SG_TABLESIZE scsiif_request_segment elements via indirection. + * The maximum number of allowed scsiif_request_segment elements is the value + * of the "feature-sg-grant" entry from Xenstore. When using indirection the + * seg[] array doesn't contain specifications of the data buffers, but + * references to scsiif_request_segment arrays, which in turn reference the + * data buffers. While nr_segments holds the number of populated seg[] entries + * (plus the set VSCSIIF_SG_GRANT bit), the number of scsiif_request_segment + * elements referencing the target data buffers is calculated from the lengths + * of the seg[] elements (the sum of all valid seg[].length divided by the + * size of one scsiif_request_segment structure). + */ +#define VSCSIIF_ACT_SCSI_CDB 1 + +/* + * Request abort of a running operation for the specified target given by + * channel, id, lun and the operation's rqid in ref_rqid. + */ +#define VSCSIIF_ACT_SCSI_ABORT 2 + +/* + * Request a device reset of the specified target (channel and id). + */ +#define VSCSIIF_ACT_SCSI_RESET 3 + +/* + * Preset scatter/gather elements for a following request. Deprecated. + * Keeping the define only to avoid usage of the value "4" for other actions. + */ +#define VSCSIIF_ACT_SCSI_SG_PRESET 4 + +/* + * Maximum scatter/gather segments per request. + * + * Considering balance between allocating at least 16 "vscsiif_request" + * structures on one page (4096 bytes) and the number of scatter/gather + * elements needed, we decided to use 26 as a magic number. + * + * If "feature-sg-grant" is set, more scatter/gather elements can be specified + * by placing them in one or more (up to VSCSIIF_SG_TABLESIZE) granted pages. + * In this case the vscsiif_request seg elements don't contain references to + * the user data, but to the SG elements referencing the user data. + */ +#define VSCSIIF_SG_TABLESIZE 26 + +/* + * based on Linux kernel 2.6.18, still valid + * Changing these values requires support of multiple protocols via the rings + * as "old clients" will blindly use these values and the resulting structure + * sizes. + */ +#define VSCSIIF_MAX_COMMAND_SIZE 16 +#define VSCSIIF_SENSE_BUFFERSIZE 96 + +struct scsiif_request_segment { + grant_ref_t gref; + uint16_t offset; + uint16_t length; +}; + +#define VSCSIIF_SG_PER_PAGE (PAGE_SIZE / sizeof(struct scsiif_request_segment)) + +/* Size of one request is 252 bytes */ +struct vscsiif_request { + uint16_t rqid; /* private guest value, echoed in resp */ + uint8_t act; /* command between backend and frontend */ + uint8_t cmd_len; /* valid CDB bytes */ + + uint8_t cmnd[VSCSIIF_MAX_COMMAND_SIZE]; /* the CDB */ + uint16_t timeout_per_command; /* deprecated */ + uint16_t channel, id, lun; /* (virtual) device specification */ + uint16_t ref_rqid; /* command abort reference */ + uint8_t sc_data_direction; /* for DMA_TO_DEVICE(1) + DMA_FROM_DEVICE(2) + DMA_NONE(3) requests */ + uint8_t nr_segments; /* Number of pieces of scatter-gather */ +/* + * flag in nr_segments: SG elements via grant page + * + * If VSCSIIF_SG_GRANT is set, the low 7 bits of nr_segments specify the number + * of grant pages containing SG elements. Usable if "feature-sg-grant" set. + */ +#define VSCSIIF_SG_GRANT 0x80 + + struct scsiif_request_segment seg[VSCSIIF_SG_TABLESIZE]; + uint32_t reserved[3]; +}; + +/* Size of one response is 252 bytes */ +struct vscsiif_response { + uint16_t rqid; /* identifies request */ + uint8_t padding; + uint8_t sense_len; + uint8_t sense_buffer[VSCSIIF_SENSE_BUFFERSIZE]; + int32_t rslt; + uint32_t residual_len; /* request bufflen - + return the value from physical device */ + uint32_t reserved[36]; +}; + +DEFINE_RING_TYPES(vscsiif, struct vscsiif_request, struct vscsiif_response); + +#endif /*__XEN__PUBLIC_IO_SCSI_H__*/ diff --git a/kernel/include/xen/interface/io/xenbus.h b/kernel/include/xen/interface/io/xenbus.h new file mode 100644 index 000000000..9fda53297 --- /dev/null +++ b/kernel/include/xen/interface/io/xenbus.h @@ -0,0 +1,50 @@ +/***************************************************************************** + * xenbus.h + * + * Xenbus protocol details. + * + * Copyright (C) 2005 XenSource Ltd. + */ + +#ifndef _XEN_PUBLIC_IO_XENBUS_H +#define _XEN_PUBLIC_IO_XENBUS_H + +/* The state of either end of the Xenbus, i.e. the current communication + status of initialisation across the bus. States here imply nothing about + the state of the connection between the driver and the kernel's device + layers. */ +enum xenbus_state +{ + XenbusStateUnknown = 0, + XenbusStateInitialising = 1, + XenbusStateInitWait = 2, /* Finished early + initialisation, but waiting + for information from the peer + or hotplug scripts. */ + XenbusStateInitialised = 3, /* Initialised and waiting for a + connection from the peer. */ + XenbusStateConnected = 4, + XenbusStateClosing = 5, /* The device is being closed + due to an error or an unplug + event. */ + XenbusStateClosed = 6, + + /* + * Reconfiguring: The device is being reconfigured. + */ + XenbusStateReconfiguring = 7, + + XenbusStateReconfigured = 8 +}; + +#endif /* _XEN_PUBLIC_IO_XENBUS_H */ + +/* + * Local variables: + * c-file-style: "linux" + * indent-tabs-mode: t + * c-indent-level: 8 + * c-basic-offset: 8 + * tab-width: 8 + * End: + */ diff --git a/kernel/include/xen/interface/io/xs_wire.h b/kernel/include/xen/interface/io/xs_wire.h new file mode 100644 index 000000000..794deb07e --- /dev/null +++ b/kernel/include/xen/interface/io/xs_wire.h @@ -0,0 +1,94 @@ +/* + * Details of the "wire" protocol between Xen Store Daemon and client + * library or guest kernel. + * Copyright (C) 2005 Rusty Russell IBM Corporation + */ + +#ifndef _XS_WIRE_H +#define _XS_WIRE_H + +enum xsd_sockmsg_type +{ + XS_DEBUG, + XS_DIRECTORY, + XS_READ, + XS_GET_PERMS, + XS_WATCH, + XS_UNWATCH, + XS_TRANSACTION_START, + XS_TRANSACTION_END, + XS_INTRODUCE, + XS_RELEASE, + XS_GET_DOMAIN_PATH, + XS_WRITE, + XS_MKDIR, + XS_RM, + XS_SET_PERMS, + XS_WATCH_EVENT, + XS_ERROR, + XS_IS_DOMAIN_INTRODUCED, + XS_RESUME, + XS_SET_TARGET, + XS_RESTRICT, + XS_RESET_WATCHES, +}; + +#define XS_WRITE_NONE "NONE" +#define XS_WRITE_CREATE "CREATE" +#define XS_WRITE_CREATE_EXCL "CREATE|EXCL" + +/* We hand errors as strings, for portability. */ +struct xsd_errors +{ + int errnum; + const char *errstring; +}; +#define XSD_ERROR(x) { x, #x } +static struct xsd_errors xsd_errors[] __attribute__((unused)) = { + XSD_ERROR(EINVAL), + XSD_ERROR(EACCES), + XSD_ERROR(EEXIST), + XSD_ERROR(EISDIR), + XSD_ERROR(ENOENT), + XSD_ERROR(ENOMEM), + XSD_ERROR(ENOSPC), + XSD_ERROR(EIO), + XSD_ERROR(ENOTEMPTY), + XSD_ERROR(ENOSYS), + XSD_ERROR(EROFS), + XSD_ERROR(EBUSY), + XSD_ERROR(EAGAIN), + XSD_ERROR(EISCONN) +}; + +struct xsd_sockmsg +{ + uint32_t type; /* XS_??? */ + uint32_t req_id;/* Request identifier, echoed in daemon's response. */ + uint32_t tx_id; /* Transaction id (0 if not related to a transaction). */ + uint32_t len; /* Length of data following this. */ + + /* Generally followed by nul-terminated string(s). */ +}; + +enum xs_watch_type +{ + XS_WATCH_PATH = 0, + XS_WATCH_TOKEN +}; + +/* Inter-domain shared memory communications. */ +#define XENSTORE_RING_SIZE 1024 +typedef uint32_t XENSTORE_RING_IDX; +#define MASK_XENSTORE_IDX(idx) ((idx) & (XENSTORE_RING_SIZE-1)) +struct xenstore_domain_interface { + char req[XENSTORE_RING_SIZE]; /* Requests to xenstore daemon. */ + char rsp[XENSTORE_RING_SIZE]; /* Replies and async watch events. */ + XENSTORE_RING_IDX req_cons, req_prod; + XENSTORE_RING_IDX rsp_cons, rsp_prod; +}; + +/* Violating this is very bad. See docs/misc/xenstore.txt. */ +#define XENSTORE_PAYLOAD_MAX 4096 + +#endif /* _XS_WIRE_H */ diff --git a/kernel/include/xen/interface/memory.h b/kernel/include/xen/interface/memory.h new file mode 100644 index 000000000..2ecfe4f70 --- /dev/null +++ b/kernel/include/xen/interface/memory.h @@ -0,0 +1,266 @@ +/****************************************************************************** + * memory.h + * + * Memory reservation and information. + * + * Copyright (c) 2005, Keir Fraser <keir@xensource.com> + */ + +#ifndef __XEN_PUBLIC_MEMORY_H__ +#define __XEN_PUBLIC_MEMORY_H__ + +#include <linux/spinlock.h> + +/* + * Increase or decrease the specified domain's memory reservation. Returns a + * -ve errcode on failure, or the # extents successfully allocated or freed. + * arg == addr of struct xen_memory_reservation. + */ +#define XENMEM_increase_reservation 0 +#define XENMEM_decrease_reservation 1 +#define XENMEM_populate_physmap 6 +struct xen_memory_reservation { + + /* + * XENMEM_increase_reservation: + * OUT: MFN (*not* GMFN) bases of extents that were allocated + * XENMEM_decrease_reservation: + * IN: GMFN bases of extents to free + * XENMEM_populate_physmap: + * IN: GPFN bases of extents to populate with memory + * OUT: GMFN bases of extents that were allocated + * (NB. This command also updates the mach_to_phys translation table) + */ + GUEST_HANDLE(xen_pfn_t) extent_start; + + /* Number of extents, and size/alignment of each (2^extent_order pages). */ + xen_ulong_t nr_extents; + unsigned int extent_order; + + /* + * Maximum # bits addressable by the user of the allocated region (e.g., + * I/O devices often have a 32-bit limitation even in 64-bit systems). If + * zero then the user has no addressing restriction. + * This field is not used by XENMEM_decrease_reservation. + */ + unsigned int address_bits; + + /* + * Domain whose reservation is being changed. + * Unprivileged domains can specify only DOMID_SELF. + */ + domid_t domid; + +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_memory_reservation); + +/* + * An atomic exchange of memory pages. If return code is zero then + * @out.extent_list provides GMFNs of the newly-allocated memory. + * Returns zero on complete success, otherwise a negative error code. + * On complete success then always @nr_exchanged == @in.nr_extents. + * On partial success @nr_exchanged indicates how much work was done. + */ +#define XENMEM_exchange 11 +struct xen_memory_exchange { + /* + * [IN] Details of memory extents to be exchanged (GMFN bases). + * Note that @in.address_bits is ignored and unused. + */ + struct xen_memory_reservation in; + + /* + * [IN/OUT] Details of new memory extents. + * We require that: + * 1. @in.domid == @out.domid + * 2. @in.nr_extents << @in.extent_order == + * @out.nr_extents << @out.extent_order + * 3. @in.extent_start and @out.extent_start lists must not overlap + * 4. @out.extent_start lists GPFN bases to be populated + * 5. @out.extent_start is overwritten with allocated GMFN bases + */ + struct xen_memory_reservation out; + + /* + * [OUT] Number of input extents that were successfully exchanged: + * 1. The first @nr_exchanged input extents were successfully + * deallocated. + * 2. The corresponding first entries in the output extent list correctly + * indicate the GMFNs that were successfully exchanged. + * 3. All other input and output extents are untouched. + * 4. If not all input exents are exchanged then the return code of this + * command will be non-zero. + * 5. THIS FIELD MUST BE INITIALISED TO ZERO BY THE CALLER! + */ + xen_ulong_t nr_exchanged; +}; + +DEFINE_GUEST_HANDLE_STRUCT(xen_memory_exchange); +/* + * Returns the maximum machine frame number of mapped RAM in this system. + * This command always succeeds (it never returns an error code). + * arg == NULL. + */ +#define XENMEM_maximum_ram_page 2 + +/* + * Returns the current or maximum memory reservation, in pages, of the + * specified domain (may be DOMID_SELF). Returns -ve errcode on failure. + * arg == addr of domid_t. + */ +#define XENMEM_current_reservation 3 +#define XENMEM_maximum_reservation 4 + +/* + * Returns a list of MFN bases of 2MB extents comprising the machine_to_phys + * mapping table. Architectures which do not have a m2p table do not implement + * this command. + * arg == addr of xen_machphys_mfn_list_t. + */ +#define XENMEM_machphys_mfn_list 5 +struct xen_machphys_mfn_list { + /* + * Size of the 'extent_start' array. Fewer entries will be filled if the + * machphys table is smaller than max_extents * 2MB. + */ + unsigned int max_extents; + + /* + * Pointer to buffer to fill with list of extent starts. If there are + * any large discontiguities in the machine address space, 2MB gaps in + * the machphys table will be represented by an MFN base of zero. + */ + GUEST_HANDLE(xen_pfn_t) extent_start; + + /* + * Number of extents written to the above array. This will be smaller + * than 'max_extents' if the machphys table is smaller than max_e * 2MB. + */ + unsigned int nr_extents; +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mfn_list); + +/* + * Returns the location in virtual address space of the machine_to_phys + * mapping table. Architectures which do not have a m2p table, or which do not + * map it by default into guest address space, do not implement this command. + * arg == addr of xen_machphys_mapping_t. + */ +#define XENMEM_machphys_mapping 12 +struct xen_machphys_mapping { + xen_ulong_t v_start, v_end; /* Start and end virtual addresses. */ + xen_ulong_t max_mfn; /* Maximum MFN that can be looked up. */ +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mapping_t); + +#define XENMAPSPACE_shared_info 0 /* shared info page */ +#define XENMAPSPACE_grant_table 1 /* grant table page */ +#define XENMAPSPACE_gmfn 2 /* GMFN */ +#define XENMAPSPACE_gmfn_range 3 /* GMFN range, XENMEM_add_to_physmap only. */ +#define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another dom, + * XENMEM_add_to_physmap_range only. + */ + +/* + * Sets the GPFN at which a particular page appears in the specified guest's + * pseudophysical address space. + * arg == addr of xen_add_to_physmap_t. + */ +#define XENMEM_add_to_physmap 7 +struct xen_add_to_physmap { + /* Which domain to change the mapping for. */ + domid_t domid; + + /* Number of pages to go through for gmfn_range */ + uint16_t size; + + /* Source mapping space. */ + unsigned int space; + + /* Index into source mapping space. */ + xen_ulong_t idx; + + /* GPFN where the source mapping page should appear. */ + xen_pfn_t gpfn; +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap); + +/*** REMOVED ***/ +/*#define XENMEM_translate_gpfn_list 8*/ + +#define XENMEM_add_to_physmap_range 23 +struct xen_add_to_physmap_range { + /* IN */ + /* Which domain to change the mapping for. */ + domid_t domid; + uint16_t space; /* => enum phys_map_space */ + + /* Number of pages to go through */ + uint16_t size; + domid_t foreign_domid; /* IFF gmfn_foreign */ + + /* Indexes into space being mapped. */ + GUEST_HANDLE(xen_ulong_t) idxs; + + /* GPFN in domid where the source mapping page should appear. */ + GUEST_HANDLE(xen_pfn_t) gpfns; + + /* OUT */ + + /* Per index error code. */ + GUEST_HANDLE(int) errs; +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap_range); + +/* + * Returns the pseudo-physical memory map as it was when the domain + * was started (specified by XENMEM_set_memory_map). + * arg == addr of struct xen_memory_map. + */ +#define XENMEM_memory_map 9 +struct xen_memory_map { + /* + * On call the number of entries which can be stored in buffer. On + * return the number of entries which have been stored in + * buffer. + */ + unsigned int nr_entries; + + /* + * Entries in the buffer are in the same format as returned by the + * BIOS INT 0x15 EAX=0xE820 call. + */ + GUEST_HANDLE(void) buffer; +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_memory_map); + +/* + * Returns the real physical memory map. Passes the same structure as + * XENMEM_memory_map. + * arg == addr of struct xen_memory_map. + */ +#define XENMEM_machine_memory_map 10 + + +/* + * Prevent the balloon driver from changing the memory reservation + * during a driver critical region. + */ +extern spinlock_t xen_reservation_lock; + +/* + * Unmaps the page appearing at a particular GPFN from the specified guest's + * pseudophysical address space. + * arg == addr of xen_remove_from_physmap_t. + */ +#define XENMEM_remove_from_physmap 15 +struct xen_remove_from_physmap { + /* Which domain to change the mapping for. */ + domid_t domid; + + /* GPFN of the current mapping of the page. */ + xen_pfn_t gpfn; +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_remove_from_physmap); + +#endif /* __XEN_PUBLIC_MEMORY_H__ */ diff --git a/kernel/include/xen/interface/nmi.h b/kernel/include/xen/interface/nmi.h new file mode 100644 index 000000000..b47d9d06f --- /dev/null +++ b/kernel/include/xen/interface/nmi.h @@ -0,0 +1,51 @@ +/****************************************************************************** + * nmi.h + * + * NMI callback registration and reason codes. + * + * Copyright (c) 2005, Keir Fraser <keir@xensource.com> + */ + +#ifndef __XEN_PUBLIC_NMI_H__ +#define __XEN_PUBLIC_NMI_H__ + +#include <xen/interface/xen.h> + +/* + * NMI reason codes: + * Currently these are x86-specific, stored in arch_shared_info.nmi_reason. + */ + /* I/O-check error reported via ISA port 0x61, bit 6. */ +#define _XEN_NMIREASON_io_error 0 +#define XEN_NMIREASON_io_error (1UL << _XEN_NMIREASON_io_error) + /* PCI SERR reported via ISA port 0x61, bit 7. */ +#define _XEN_NMIREASON_pci_serr 1 +#define XEN_NMIREASON_pci_serr (1UL << _XEN_NMIREASON_pci_serr) + /* Unknown hardware-generated NMI. */ +#define _XEN_NMIREASON_unknown 2 +#define XEN_NMIREASON_unknown (1UL << _XEN_NMIREASON_unknown) + +/* + * long nmi_op(unsigned int cmd, void *arg) + * NB. All ops return zero on success, else a negative error code. + */ + +/* + * Register NMI callback for this (calling) VCPU. Currently this only makes + * sense for domain 0, vcpu 0. All other callers will be returned EINVAL. + * arg == pointer to xennmi_callback structure. + */ +#define XENNMI_register_callback 0 +struct xennmi_callback { + unsigned long handler_address; + unsigned long pad; +}; +DEFINE_GUEST_HANDLE_STRUCT(xennmi_callback); + +/* + * Deregister NMI callback for this (calling) VCPU. + * arg == NULL. + */ +#define XENNMI_unregister_callback 1 + +#endif /* __XEN_PUBLIC_NMI_H__ */ diff --git a/kernel/include/xen/interface/physdev.h b/kernel/include/xen/interface/physdev.h new file mode 100644 index 000000000..610dba9b6 --- /dev/null +++ b/kernel/include/xen/interface/physdev.h @@ -0,0 +1,321 @@ +/* + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#ifndef __XEN_PUBLIC_PHYSDEV_H__ +#define __XEN_PUBLIC_PHYSDEV_H__ + +/* + * Prototype for this hypercall is: + * int physdev_op(int cmd, void *args) + * @cmd == PHYSDEVOP_??? (physdev operation). + * @args == Operation-specific extra arguments (NULL if none). + */ + +/* + * Notify end-of-interrupt (EOI) for the specified IRQ. + * @arg == pointer to physdev_eoi structure. + */ +#define PHYSDEVOP_eoi 12 +struct physdev_eoi { + /* IN */ + uint32_t irq; +}; + +/* + * Register a shared page for the hypervisor to indicate whether the guest + * must issue PHYSDEVOP_eoi. The semantics of PHYSDEVOP_eoi change slightly + * once the guest used this function in that the associated event channel + * will automatically get unmasked. The page registered is used as a bit + * array indexed by Xen's PIRQ value. + */ +#define PHYSDEVOP_pirq_eoi_gmfn_v1 17 +/* + * Register a shared page for the hypervisor to indicate whether the + * guest must issue PHYSDEVOP_eoi. This hypercall is very similar to + * PHYSDEVOP_pirq_eoi_gmfn_v1 but it doesn't change the semantics of + * PHYSDEVOP_eoi. The page registered is used as a bit array indexed by + * Xen's PIRQ value. + */ +#define PHYSDEVOP_pirq_eoi_gmfn_v2 28 +struct physdev_pirq_eoi_gmfn { + /* IN */ + xen_ulong_t gmfn; +}; + +/* + * Query the status of an IRQ line. + * @arg == pointer to physdev_irq_status_query structure. + */ +#define PHYSDEVOP_irq_status_query 5 +struct physdev_irq_status_query { + /* IN */ + uint32_t irq; + /* OUT */ + uint32_t flags; /* XENIRQSTAT_* */ +}; + +/* Need to call PHYSDEVOP_eoi when the IRQ has been serviced? */ +#define _XENIRQSTAT_needs_eoi (0) +#define XENIRQSTAT_needs_eoi (1U<<_XENIRQSTAT_needs_eoi) + +/* IRQ shared by multiple guests? */ +#define _XENIRQSTAT_shared (1) +#define XENIRQSTAT_shared (1U<<_XENIRQSTAT_shared) + +/* + * Set the current VCPU's I/O privilege level. + * @arg == pointer to physdev_set_iopl structure. + */ +#define PHYSDEVOP_set_iopl 6 +struct physdev_set_iopl { + /* IN */ + uint32_t iopl; +}; + +/* + * Set the current VCPU's I/O-port permissions bitmap. + * @arg == pointer to physdev_set_iobitmap structure. + */ +#define PHYSDEVOP_set_iobitmap 7 +struct physdev_set_iobitmap { + /* IN */ + uint8_t * bitmap; + uint32_t nr_ports; +}; + +/* + * Read or write an IO-APIC register. + * @arg == pointer to physdev_apic structure. + */ +#define PHYSDEVOP_apic_read 8 +#define PHYSDEVOP_apic_write 9 +struct physdev_apic { + /* IN */ + unsigned long apic_physbase; + uint32_t reg; + /* IN or OUT */ + uint32_t value; +}; + +/* + * Allocate or free a physical upcall vector for the specified IRQ line. + * @arg == pointer to physdev_irq structure. + */ +#define PHYSDEVOP_alloc_irq_vector 10 +#define PHYSDEVOP_free_irq_vector 11 +struct physdev_irq { + /* IN */ + uint32_t irq; + /* IN or OUT */ + uint32_t vector; +}; + +#define MAP_PIRQ_TYPE_MSI 0x0 +#define MAP_PIRQ_TYPE_GSI 0x1 +#define MAP_PIRQ_TYPE_UNKNOWN 0x2 +#define MAP_PIRQ_TYPE_MSI_SEG 0x3 +#define MAP_PIRQ_TYPE_MULTI_MSI 0x4 + +#define PHYSDEVOP_map_pirq 13 +struct physdev_map_pirq { + domid_t domid; + /* IN */ + int type; + /* IN */ + int index; + /* IN or OUT */ + int pirq; + /* IN - high 16 bits hold segment for ..._MSI_SEG and ..._MULTI_MSI */ + int bus; + /* IN */ + int devfn; + /* IN + * - For MSI-X contains entry number. + * - For MSI with ..._MULTI_MSI contains number of vectors. + * OUT (..._MULTI_MSI only) + * - Number of vectors allocated. + */ + int entry_nr; + /* IN */ + uint64_t table_base; +}; + +#define PHYSDEVOP_unmap_pirq 14 +struct physdev_unmap_pirq { + domid_t domid; + /* IN */ + int pirq; +}; + +#define PHYSDEVOP_manage_pci_add 15 +#define PHYSDEVOP_manage_pci_remove 16 +struct physdev_manage_pci { + /* IN */ + uint8_t bus; + uint8_t devfn; +}; + +#define PHYSDEVOP_restore_msi 19 +struct physdev_restore_msi { + /* IN */ + uint8_t bus; + uint8_t devfn; +}; + +#define PHYSDEVOP_manage_pci_add_ext 20 +struct physdev_manage_pci_ext { + /* IN */ + uint8_t bus; + uint8_t devfn; + unsigned is_extfn; + unsigned is_virtfn; + struct { + uint8_t bus; + uint8_t devfn; + } physfn; +}; + +/* + * Argument to physdev_op_compat() hypercall. Superceded by new physdev_op() + * hypercall since 0x00030202. + */ +struct physdev_op { + uint32_t cmd; + union { + struct physdev_irq_status_query irq_status_query; + struct physdev_set_iopl set_iopl; + struct physdev_set_iobitmap set_iobitmap; + struct physdev_apic apic_op; + struct physdev_irq irq_op; + } u; +}; + +#define PHYSDEVOP_setup_gsi 21 +struct physdev_setup_gsi { + int gsi; + /* IN */ + uint8_t triggering; + /* IN */ + uint8_t polarity; + /* IN */ +}; + +#define PHYSDEVOP_get_nr_pirqs 22 +struct physdev_nr_pirqs { + /* OUT */ + uint32_t nr_pirqs; +}; + +/* type is MAP_PIRQ_TYPE_GSI or MAP_PIRQ_TYPE_MSI + * the hypercall returns a free pirq */ +#define PHYSDEVOP_get_free_pirq 23 +struct physdev_get_free_pirq { + /* IN */ + int type; + /* OUT */ + uint32_t pirq; +}; + +#define XEN_PCI_DEV_EXTFN 0x1 +#define XEN_PCI_DEV_VIRTFN 0x2 +#define XEN_PCI_DEV_PXM 0x4 + +#define XEN_PCI_MMCFG_RESERVED 0x1 + +#define PHYSDEVOP_pci_mmcfg_reserved 24 +struct physdev_pci_mmcfg_reserved { + uint64_t address; + uint16_t segment; + uint8_t start_bus; + uint8_t end_bus; + uint32_t flags; +}; + +#define PHYSDEVOP_pci_device_add 25 +struct physdev_pci_device_add { + /* IN */ + uint16_t seg; + uint8_t bus; + uint8_t devfn; + uint32_t flags; + struct { + uint8_t bus; + uint8_t devfn; + } physfn; +#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L + uint32_t optarr[]; +#elif defined(__GNUC__) + uint32_t optarr[0]; +#endif +}; + +#define PHYSDEVOP_pci_device_remove 26 +#define PHYSDEVOP_restore_msi_ext 27 +/* + * Dom0 should use these two to announce MMIO resources assigned to + * MSI-X capable devices won't (prepare) or may (release) change. + */ +#define PHYSDEVOP_prepare_msix 30 +#define PHYSDEVOP_release_msix 31 +struct physdev_pci_device { + /* IN */ + uint16_t seg; + uint8_t bus; + uint8_t devfn; +}; + +#define PHYSDEVOP_DBGP_RESET_PREPARE 1 +#define PHYSDEVOP_DBGP_RESET_DONE 2 + +#define PHYSDEVOP_DBGP_BUS_UNKNOWN 0 +#define PHYSDEVOP_DBGP_BUS_PCI 1 + +#define PHYSDEVOP_dbgp_op 29 +struct physdev_dbgp_op { + /* IN */ + uint8_t op; + uint8_t bus; + union { + struct physdev_pci_device pci; + } u; +}; + +/* + * Notify that some PIRQ-bound event channels have been unmasked. + * ** This command is obsolete since interface version 0x00030202 and is ** + * ** unsupported by newer versions of Xen. ** + */ +#define PHYSDEVOP_IRQ_UNMASK_NOTIFY 4 + +/* + * These all-capitals physdev operation names are superceded by the new names + * (defined above) since interface version 0x00030202. + */ +#define PHYSDEVOP_IRQ_STATUS_QUERY PHYSDEVOP_irq_status_query +#define PHYSDEVOP_SET_IOPL PHYSDEVOP_set_iopl +#define PHYSDEVOP_SET_IOBITMAP PHYSDEVOP_set_iobitmap +#define PHYSDEVOP_APIC_READ PHYSDEVOP_apic_read +#define PHYSDEVOP_APIC_WRITE PHYSDEVOP_apic_write +#define PHYSDEVOP_ASSIGN_VECTOR PHYSDEVOP_alloc_irq_vector +#define PHYSDEVOP_FREE_VECTOR PHYSDEVOP_free_irq_vector +#define PHYSDEVOP_IRQ_NEEDS_UNMASK_NOTIFY XENIRQSTAT_needs_eoi +#define PHYSDEVOP_IRQ_SHARED XENIRQSTAT_shared + +#endif /* __XEN_PUBLIC_PHYSDEV_H__ */ diff --git a/kernel/include/xen/interface/platform.h b/kernel/include/xen/interface/platform.h new file mode 100644 index 000000000..5cc49ea8d --- /dev/null +++ b/kernel/include/xen/interface/platform.h @@ -0,0 +1,503 @@ +/****************************************************************************** + * platform.h + * + * Hardware platform operations. Intended for use by domain-0 kernel. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Copyright (c) 2002-2006, K Fraser + */ + +#ifndef __XEN_PUBLIC_PLATFORM_H__ +#define __XEN_PUBLIC_PLATFORM_H__ + +#include <xen/interface/xen.h> + +#define XENPF_INTERFACE_VERSION 0x03000001 + +/* + * Set clock such that it would read <secs,nsecs> after 00:00:00 UTC, + * 1 January, 1970 if the current system time was <system_time>. + */ +#define XENPF_settime 17 +struct xenpf_settime { + /* IN variables. */ + uint32_t secs; + uint32_t nsecs; + uint64_t system_time; +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_settime_t); + +/* + * Request memory range (@mfn, @mfn+@nr_mfns-1) to have type @type. + * On x86, @type is an architecture-defined MTRR memory type. + * On success, returns the MTRR that was used (@reg) and a handle that can + * be passed to XENPF_DEL_MEMTYPE to accurately tear down the new setting. + * (x86-specific). + */ +#define XENPF_add_memtype 31 +struct xenpf_add_memtype { + /* IN variables. */ + xen_pfn_t mfn; + uint64_t nr_mfns; + uint32_t type; + /* OUT variables. */ + uint32_t handle; + uint32_t reg; +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_add_memtype_t); + +/* + * Tear down an existing memory-range type. If @handle is remembered then it + * should be passed in to accurately tear down the correct setting (in case + * of overlapping memory regions with differing types). If it is not known + * then @handle should be set to zero. In all cases @reg must be set. + * (x86-specific). + */ +#define XENPF_del_memtype 32 +struct xenpf_del_memtype { + /* IN variables. */ + uint32_t handle; + uint32_t reg; +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_del_memtype_t); + +/* Read current type of an MTRR (x86-specific). */ +#define XENPF_read_memtype 33 +struct xenpf_read_memtype { + /* IN variables. */ + uint32_t reg; + /* OUT variables. */ + xen_pfn_t mfn; + uint64_t nr_mfns; + uint32_t type; +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_read_memtype_t); + +#define XENPF_microcode_update 35 +struct xenpf_microcode_update { + /* IN variables. */ + GUEST_HANDLE(void) data; /* Pointer to microcode data */ + uint32_t length; /* Length of microcode data. */ +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_microcode_update_t); + +#define XENPF_platform_quirk 39 +#define QUIRK_NOIRQBALANCING 1 /* Do not restrict IO-APIC RTE targets */ +#define QUIRK_IOAPIC_BAD_REGSEL 2 /* IO-APIC REGSEL forgets its value */ +#define QUIRK_IOAPIC_GOOD_REGSEL 3 /* IO-APIC REGSEL behaves properly */ +struct xenpf_platform_quirk { + /* IN variables. */ + uint32_t quirk_id; +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_platform_quirk_t); + +#define XENPF_efi_runtime_call 49 +#define XEN_EFI_get_time 1 +#define XEN_EFI_set_time 2 +#define XEN_EFI_get_wakeup_time 3 +#define XEN_EFI_set_wakeup_time 4 +#define XEN_EFI_get_next_high_monotonic_count 5 +#define XEN_EFI_get_variable 6 +#define XEN_EFI_set_variable 7 +#define XEN_EFI_get_next_variable_name 8 +#define XEN_EFI_query_variable_info 9 +#define XEN_EFI_query_capsule_capabilities 10 +#define XEN_EFI_update_capsule 11 + +struct xenpf_efi_runtime_call { + uint32_t function; + /* + * This field is generally used for per sub-function flags (defined + * below), except for the XEN_EFI_get_next_high_monotonic_count case, + * where it holds the single returned value. + */ + uint32_t misc; + xen_ulong_t status; + union { +#define XEN_EFI_GET_TIME_SET_CLEARS_NS 0x00000001 + struct { + struct xenpf_efi_time { + uint16_t year; + uint8_t month; + uint8_t day; + uint8_t hour; + uint8_t min; + uint8_t sec; + uint32_t ns; + int16_t tz; + uint8_t daylight; + } time; + uint32_t resolution; + uint32_t accuracy; + } get_time; + + struct xenpf_efi_time set_time; + +#define XEN_EFI_GET_WAKEUP_TIME_ENABLED 0x00000001 +#define XEN_EFI_GET_WAKEUP_TIME_PENDING 0x00000002 + struct xenpf_efi_time get_wakeup_time; + +#define XEN_EFI_SET_WAKEUP_TIME_ENABLE 0x00000001 +#define XEN_EFI_SET_WAKEUP_TIME_ENABLE_ONLY 0x00000002 + struct xenpf_efi_time set_wakeup_time; + +#define XEN_EFI_VARIABLE_NON_VOLATILE 0x00000001 +#define XEN_EFI_VARIABLE_BOOTSERVICE_ACCESS 0x00000002 +#define XEN_EFI_VARIABLE_RUNTIME_ACCESS 0x00000004 + struct { + GUEST_HANDLE(void) name; /* UCS-2/UTF-16 string */ + xen_ulong_t size; + GUEST_HANDLE(void) data; + struct xenpf_efi_guid { + uint32_t data1; + uint16_t data2; + uint16_t data3; + uint8_t data4[8]; + } vendor_guid; + } get_variable, set_variable; + + struct { + xen_ulong_t size; + GUEST_HANDLE(void) name; /* UCS-2/UTF-16 string */ + struct xenpf_efi_guid vendor_guid; + } get_next_variable_name; + + struct { + uint32_t attr; + uint64_t max_store_size; + uint64_t remain_store_size; + uint64_t max_size; + } query_variable_info; + + struct { + GUEST_HANDLE(void) capsule_header_array; + xen_ulong_t capsule_count; + uint64_t max_capsule_size; + uint32_t reset_type; + } query_capsule_capabilities; + + struct { + GUEST_HANDLE(void) capsule_header_array; + xen_ulong_t capsule_count; + uint64_t sg_list; /* machine address */ + } update_capsule; + } u; +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_efi_runtime_call); + +#define XEN_FW_EFI_VERSION 0 +#define XEN_FW_EFI_CONFIG_TABLE 1 +#define XEN_FW_EFI_VENDOR 2 +#define XEN_FW_EFI_MEM_INFO 3 +#define XEN_FW_EFI_RT_VERSION 4 + +#define XENPF_firmware_info 50 +#define XEN_FW_DISK_INFO 1 /* from int 13 AH=08/41/48 */ +#define XEN_FW_DISK_MBR_SIGNATURE 2 /* from MBR offset 0x1b8 */ +#define XEN_FW_VBEDDC_INFO 3 /* from int 10 AX=4f15 */ +#define XEN_FW_EFI_INFO 4 /* from EFI */ +#define XEN_FW_KBD_SHIFT_FLAGS 5 /* Int16, Fn02: Get keyboard shift flags. */ + +struct xenpf_firmware_info { + /* IN variables. */ + uint32_t type; + uint32_t index; + /* OUT variables. */ + union { + struct { + /* Int13, Fn48: Check Extensions Present. */ + uint8_t device; /* %dl: bios device number */ + uint8_t version; /* %ah: major version */ + uint16_t interface_support; /* %cx: support bitmap */ + /* Int13, Fn08: Legacy Get Device Parameters. */ + uint16_t legacy_max_cylinder; /* %cl[7:6]:%ch: max cyl # */ + uint8_t legacy_max_head; /* %dh: max head # */ + uint8_t legacy_sectors_per_track; /* %cl[5:0]: max sector # */ + /* Int13, Fn41: Get Device Parameters (as filled into %ds:%esi). */ + /* NB. First uint16_t of buffer must be set to buffer size. */ + GUEST_HANDLE(void) edd_params; + } disk_info; /* XEN_FW_DISK_INFO */ + struct { + uint8_t device; /* bios device number */ + uint32_t mbr_signature; /* offset 0x1b8 in mbr */ + } disk_mbr_signature; /* XEN_FW_DISK_MBR_SIGNATURE */ + struct { + /* Int10, AX=4F15: Get EDID info. */ + uint8_t capabilities; + uint8_t edid_transfer_time; + /* must refer to 128-byte buffer */ + GUEST_HANDLE(uchar) edid; + } vbeddc_info; /* XEN_FW_VBEDDC_INFO */ + + union xenpf_efi_info { + uint32_t version; + struct { + uint64_t addr; /* EFI_CONFIGURATION_TABLE */ + uint32_t nent; + } cfg; + struct { + uint32_t revision; + uint32_t bufsz; /* input, in bytes */ + GUEST_HANDLE(void) name; + /* UCS-2/UTF-16 string */ + } vendor; + struct { + uint64_t addr; + uint64_t size; + uint64_t attr; + uint32_t type; + } mem; + } efi_info; /* XEN_FW_EFI_INFO */ + + uint8_t kbd_shift_flags; /* XEN_FW_KBD_SHIFT_FLAGS */ + } u; +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_firmware_info_t); + +#define XENPF_enter_acpi_sleep 51 +struct xenpf_enter_acpi_sleep { + /* IN variables */ + uint16_t val_a; /* PM1a control / sleep type A. */ + uint16_t val_b; /* PM1b control / sleep type B. */ + uint32_t sleep_state; /* Which state to enter (Sn). */ +#define XENPF_ACPI_SLEEP_EXTENDED 0x00000001 + uint32_t flags; /* XENPF_ACPI_SLEEP_*. */ +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_enter_acpi_sleep_t); + +#define XENPF_change_freq 52 +struct xenpf_change_freq { + /* IN variables */ + uint32_t flags; /* Must be zero. */ + uint32_t cpu; /* Physical cpu. */ + uint64_t freq; /* New frequency (Hz). */ +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_change_freq_t); + +/* + * Get idle times (nanoseconds since boot) for physical CPUs specified in the + * @cpumap_bitmap with range [0..@cpumap_nr_cpus-1]. The @idletime array is + * indexed by CPU number; only entries with the corresponding @cpumap_bitmap + * bit set are written to. On return, @cpumap_bitmap is modified so that any + * non-existent CPUs are cleared. Such CPUs have their @idletime array entry + * cleared. + */ +#define XENPF_getidletime 53 +struct xenpf_getidletime { + /* IN/OUT variables */ + /* IN: CPUs to interrogate; OUT: subset of IN which are present */ + GUEST_HANDLE(uchar) cpumap_bitmap; + /* IN variables */ + /* Size of cpumap bitmap. */ + uint32_t cpumap_nr_cpus; + /* Must be indexable for every cpu in cpumap_bitmap. */ + GUEST_HANDLE(uint64_t) idletime; + /* OUT variables */ + /* System time when the idletime snapshots were taken. */ + uint64_t now; +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_getidletime_t); + +#define XENPF_set_processor_pminfo 54 + +/* ability bits */ +#define XEN_PROCESSOR_PM_CX 1 +#define XEN_PROCESSOR_PM_PX 2 +#define XEN_PROCESSOR_PM_TX 4 + +/* cmd type */ +#define XEN_PM_CX 0 +#define XEN_PM_PX 1 +#define XEN_PM_TX 2 +#define XEN_PM_PDC 3 +/* Px sub info type */ +#define XEN_PX_PCT 1 +#define XEN_PX_PSS 2 +#define XEN_PX_PPC 4 +#define XEN_PX_PSD 8 + +struct xen_power_register { + uint32_t space_id; + uint32_t bit_width; + uint32_t bit_offset; + uint32_t access_size; + uint64_t address; +}; + +struct xen_processor_csd { + uint32_t domain; /* domain number of one dependent group */ + uint32_t coord_type; /* coordination type */ + uint32_t num; /* number of processors in same domain */ +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_processor_csd); + +struct xen_processor_cx { + struct xen_power_register reg; /* GAS for Cx trigger register */ + uint8_t type; /* cstate value, c0: 0, c1: 1, ... */ + uint32_t latency; /* worst latency (ms) to enter/exit this cstate */ + uint32_t power; /* average power consumption(mW) */ + uint32_t dpcnt; /* number of dependency entries */ + GUEST_HANDLE(xen_processor_csd) dp; /* NULL if no dependency */ +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_processor_cx); + +struct xen_processor_flags { + uint32_t bm_control:1; + uint32_t bm_check:1; + uint32_t has_cst:1; + uint32_t power_setup_done:1; + uint32_t bm_rld_set:1; +}; + +struct xen_processor_power { + uint32_t count; /* number of C state entries in array below */ + struct xen_processor_flags flags; /* global flags of this processor */ + GUEST_HANDLE(xen_processor_cx) states; /* supported c states */ +}; + +struct xen_pct_register { + uint8_t descriptor; + uint16_t length; + uint8_t space_id; + uint8_t bit_width; + uint8_t bit_offset; + uint8_t reserved; + uint64_t address; +}; + +struct xen_processor_px { + uint64_t core_frequency; /* megahertz */ + uint64_t power; /* milliWatts */ + uint64_t transition_latency; /* microseconds */ + uint64_t bus_master_latency; /* microseconds */ + uint64_t control; /* control value */ + uint64_t status; /* success indicator */ +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_processor_px); + +struct xen_psd_package { + uint64_t num_entries; + uint64_t revision; + uint64_t domain; + uint64_t coord_type; + uint64_t num_processors; +}; + +struct xen_processor_performance { + uint32_t flags; /* flag for Px sub info type */ + uint32_t platform_limit; /* Platform limitation on freq usage */ + struct xen_pct_register control_register; + struct xen_pct_register status_register; + uint32_t state_count; /* total available performance states */ + GUEST_HANDLE(xen_processor_px) states; + struct xen_psd_package domain_info; + uint32_t shared_type; /* coordination type of this processor */ +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_processor_performance); + +struct xenpf_set_processor_pminfo { + /* IN variables */ + uint32_t id; /* ACPI CPU ID */ + uint32_t type; /* {XEN_PM_CX, XEN_PM_PX} */ + union { + struct xen_processor_power power;/* Cx: _CST/_CSD */ + struct xen_processor_performance perf; /* Px: _PPC/_PCT/_PSS/_PSD */ + GUEST_HANDLE(uint32_t) pdc; + }; +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_set_processor_pminfo); + +#define XENPF_get_cpuinfo 55 +struct xenpf_pcpuinfo { + /* IN */ + uint32_t xen_cpuid; + /* OUT */ + /* The maxium cpu_id that is present */ + uint32_t max_present; +#define XEN_PCPU_FLAGS_ONLINE 1 + /* Correponding xen_cpuid is not present*/ +#define XEN_PCPU_FLAGS_INVALID 2 + uint32_t flags; + uint32_t apic_id; + uint32_t acpi_id; +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_pcpuinfo); + +#define XENPF_cpu_online 56 +#define XENPF_cpu_offline 57 +struct xenpf_cpu_ol { + uint32_t cpuid; +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_cpu_ol); + +#define XENPF_cpu_hotadd 58 +struct xenpf_cpu_hotadd { + uint32_t apic_id; + uint32_t acpi_id; + uint32_t pxm; +}; + +#define XENPF_mem_hotadd 59 +struct xenpf_mem_hotadd { + uint64_t spfn; + uint64_t epfn; + uint32_t pxm; + uint32_t flags; +}; + +#define XENPF_core_parking 60 +struct xenpf_core_parking { + /* IN variables */ +#define XEN_CORE_PARKING_SET 1 +#define XEN_CORE_PARKING_GET 2 + uint32_t type; + /* IN variables: set cpu nums expected to be idled */ + /* OUT variables: get cpu nums actually be idled */ + uint32_t idle_nums; +}; +DEFINE_GUEST_HANDLE_STRUCT(xenpf_core_parking); + +struct xen_platform_op { + uint32_t cmd; + uint32_t interface_version; /* XENPF_INTERFACE_VERSION */ + union { + struct xenpf_settime settime; + struct xenpf_add_memtype add_memtype; + struct xenpf_del_memtype del_memtype; + struct xenpf_read_memtype read_memtype; + struct xenpf_microcode_update microcode; + struct xenpf_platform_quirk platform_quirk; + struct xenpf_efi_runtime_call efi_runtime_call; + struct xenpf_firmware_info firmware_info; + struct xenpf_enter_acpi_sleep enter_acpi_sleep; + struct xenpf_change_freq change_freq; + struct xenpf_getidletime getidletime; + struct xenpf_set_processor_pminfo set_pminfo; + struct xenpf_pcpuinfo pcpu_info; + struct xenpf_cpu_ol cpu_ol; + struct xenpf_cpu_hotadd cpu_add; + struct xenpf_mem_hotadd mem_add; + struct xenpf_core_parking core_parking; + uint8_t pad[128]; + } u; +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_platform_op_t); + +#endif /* __XEN_PUBLIC_PLATFORM_H__ */ diff --git a/kernel/include/xen/interface/sched.h b/kernel/include/xen/interface/sched.h new file mode 100644 index 000000000..9ce083960 --- /dev/null +++ b/kernel/include/xen/interface/sched.h @@ -0,0 +1,111 @@ +/****************************************************************************** + * sched.h + * + * Scheduler state interactions + * + * Copyright (c) 2005, Keir Fraser <keir@xensource.com> + */ + +#ifndef __XEN_PUBLIC_SCHED_H__ +#define __XEN_PUBLIC_SCHED_H__ + +#include <xen/interface/event_channel.h> + +/* + * The prototype for this hypercall is: + * long sched_op_new(int cmd, void *arg) + * @cmd == SCHEDOP_??? (scheduler operation). + * @arg == Operation-specific extra argument(s), as described below. + * + * **NOTE**: + * Versions of Xen prior to 3.0.2 provide only the following legacy version + * of this hypercall, supporting only the commands yield, block and shutdown: + * long sched_op(int cmd, unsigned long arg) + * @cmd == SCHEDOP_??? (scheduler operation). + * @arg == 0 (SCHEDOP_yield and SCHEDOP_block) + * == SHUTDOWN_* code (SCHEDOP_shutdown) + */ + +/* + * Voluntarily yield the CPU. + * @arg == NULL. + */ +#define SCHEDOP_yield 0 + +/* + * Block execution of this VCPU until an event is received for processing. + * If called with event upcalls masked, this operation will atomically + * reenable event delivery and check for pending events before blocking the + * VCPU. This avoids a "wakeup waiting" race. + * @arg == NULL. + */ +#define SCHEDOP_block 1 + +/* + * Halt execution of this domain (all VCPUs) and notify the system controller. + * @arg == pointer to sched_shutdown structure. + */ +#define SCHEDOP_shutdown 2 +struct sched_shutdown { + unsigned int reason; /* SHUTDOWN_* */ +}; +DEFINE_GUEST_HANDLE_STRUCT(sched_shutdown); + +/* + * Poll a set of event-channel ports. Return when one or more are pending. An + * optional timeout may be specified. + * @arg == pointer to sched_poll structure. + */ +#define SCHEDOP_poll 3 +struct sched_poll { + GUEST_HANDLE(evtchn_port_t) ports; + unsigned int nr_ports; + uint64_t timeout; +}; +DEFINE_GUEST_HANDLE_STRUCT(sched_poll); + +/* + * Declare a shutdown for another domain. The main use of this function is + * in interpreting shutdown requests and reasons for fully-virtualized + * domains. A para-virtualized domain may use SCHEDOP_shutdown directly. + * @arg == pointer to sched_remote_shutdown structure. + */ +#define SCHEDOP_remote_shutdown 4 +struct sched_remote_shutdown { + domid_t domain_id; /* Remote domain ID */ + unsigned int reason; /* SHUTDOWN_xxx reason */ +}; + +/* + * Latch a shutdown code, so that when the domain later shuts down it + * reports this code to the control tools. + * @arg == as for SCHEDOP_shutdown. + */ +#define SCHEDOP_shutdown_code 5 + +/* + * Setup, poke and destroy a domain watchdog timer. + * @arg == pointer to sched_watchdog structure. + * With id == 0, setup a domain watchdog timer to cause domain shutdown + * after timeout, returns watchdog id. + * With id != 0 and timeout == 0, destroy domain watchdog timer. + * With id != 0 and timeout != 0, poke watchdog timer and set new timeout. + */ +#define SCHEDOP_watchdog 6 +struct sched_watchdog { + uint32_t id; /* watchdog ID */ + uint32_t timeout; /* timeout */ +}; + +/* + * Reason codes for SCHEDOP_shutdown. These may be interpreted by control + * software to determine the appropriate action. For the most part, Xen does + * not care about the shutdown code. + */ +#define SHUTDOWN_poweroff 0 /* Domain exited normally. Clean up and kill. */ +#define SHUTDOWN_reboot 1 /* Clean up, kill, and then restart. */ +#define SHUTDOWN_suspend 2 /* Clean up, save suspend info, kill. */ +#define SHUTDOWN_crash 3 /* Tell controller we've crashed. */ +#define SHUTDOWN_watchdog 4 /* Restart because watchdog time expired. */ + +#endif /* __XEN_PUBLIC_SCHED_H__ */ diff --git a/kernel/include/xen/interface/vcpu.h b/kernel/include/xen/interface/vcpu.h new file mode 100644 index 000000000..b05288ce3 --- /dev/null +++ b/kernel/include/xen/interface/vcpu.h @@ -0,0 +1,175 @@ +/****************************************************************************** + * vcpu.h + * + * VCPU initialisation, query, and hotplug. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Copyright (c) 2005, Keir Fraser <keir@xensource.com> + */ + +#ifndef __XEN_PUBLIC_VCPU_H__ +#define __XEN_PUBLIC_VCPU_H__ + +/* + * Prototype for this hypercall is: + * int vcpu_op(int cmd, int vcpuid, void *extra_args) + * @cmd == VCPUOP_??? (VCPU operation). + * @vcpuid == VCPU to operate on. + * @extra_args == Operation-specific extra arguments (NULL if none). + */ + +/* + * Initialise a VCPU. Each VCPU can be initialised only once. A + * newly-initialised VCPU will not run until it is brought up by VCPUOP_up. + * + * @extra_arg == pointer to vcpu_guest_context structure containing initial + * state for the VCPU. + */ +#define VCPUOP_initialise 0 + +/* + * Bring up a VCPU. This makes the VCPU runnable. This operation will fail + * if the VCPU has not been initialised (VCPUOP_initialise). + */ +#define VCPUOP_up 1 + +/* + * Bring down a VCPU (i.e., make it non-runnable). + * There are a few caveats that callers should observe: + * 1. This operation may return, and VCPU_is_up may return false, before the + * VCPU stops running (i.e., the command is asynchronous). It is a good + * idea to ensure that the VCPU has entered a non-critical loop before + * bringing it down. Alternatively, this operation is guaranteed + * synchronous if invoked by the VCPU itself. + * 2. After a VCPU is initialised, there is currently no way to drop all its + * references to domain memory. Even a VCPU that is down still holds + * memory references via its pagetable base pointer and GDT. It is good + * practise to move a VCPU onto an 'idle' or default page table, LDT and + * GDT before bringing it down. + */ +#define VCPUOP_down 2 + +/* Returns 1 if the given VCPU is up. */ +#define VCPUOP_is_up 3 + +/* + * Return information about the state and running time of a VCPU. + * @extra_arg == pointer to vcpu_runstate_info structure. + */ +#define VCPUOP_get_runstate_info 4 +struct vcpu_runstate_info { + /* VCPU's current state (RUNSTATE_*). */ + int state; + /* When was current state entered (system time, ns)? */ + uint64_t state_entry_time; + /* + * Time spent in each RUNSTATE_* (ns). The sum of these times is + * guaranteed not to drift from system time. + */ + uint64_t time[4]; +}; +DEFINE_GUEST_HANDLE_STRUCT(vcpu_runstate_info); + +/* VCPU is currently running on a physical CPU. */ +#define RUNSTATE_running 0 + +/* VCPU is runnable, but not currently scheduled on any physical CPU. */ +#define RUNSTATE_runnable 1 + +/* VCPU is blocked (a.k.a. idle). It is therefore not runnable. */ +#define RUNSTATE_blocked 2 + +/* + * VCPU is not runnable, but it is not blocked. + * This is a 'catch all' state for things like hotplug and pauses by the + * system administrator (or for critical sections in the hypervisor). + * RUNSTATE_blocked dominates this state (it is the preferred state). + */ +#define RUNSTATE_offline 3 + +/* + * Register a shared memory area from which the guest may obtain its own + * runstate information without needing to execute a hypercall. + * Notes: + * 1. The registered address may be virtual or physical, depending on the + * platform. The virtual address should be registered on x86 systems. + * 2. Only one shared area may be registered per VCPU. The shared area is + * updated by the hypervisor each time the VCPU is scheduled. Thus + * runstate.state will always be RUNSTATE_running and + * runstate.state_entry_time will indicate the system time at which the + * VCPU was last scheduled to run. + * @extra_arg == pointer to vcpu_register_runstate_memory_area structure. + */ +#define VCPUOP_register_runstate_memory_area 5 +struct vcpu_register_runstate_memory_area { + union { + GUEST_HANDLE(vcpu_runstate_info) h; + struct vcpu_runstate_info *v; + uint64_t p; + } addr; +}; + +/* + * Set or stop a VCPU's periodic timer. Every VCPU has one periodic timer + * which can be set via these commands. Periods smaller than one millisecond + * may not be supported. + */ +#define VCPUOP_set_periodic_timer 6 /* arg == vcpu_set_periodic_timer_t */ +#define VCPUOP_stop_periodic_timer 7 /* arg == NULL */ +struct vcpu_set_periodic_timer { + uint64_t period_ns; +}; +DEFINE_GUEST_HANDLE_STRUCT(vcpu_set_periodic_timer); + +/* + * Set or stop a VCPU's single-shot timer. Every VCPU has one single-shot + * timer which can be set via these commands. + */ +#define VCPUOP_set_singleshot_timer 8 /* arg == vcpu_set_singleshot_timer_t */ +#define VCPUOP_stop_singleshot_timer 9 /* arg == NULL */ +struct vcpu_set_singleshot_timer { + uint64_t timeout_abs_ns; + uint32_t flags; /* VCPU_SSHOTTMR_??? */ +}; +DEFINE_GUEST_HANDLE_STRUCT(vcpu_set_singleshot_timer); + +/* Flags to VCPUOP_set_singleshot_timer. */ + /* Require the timeout to be in the future (return -ETIME if it's passed). */ +#define _VCPU_SSHOTTMR_future (0) +#define VCPU_SSHOTTMR_future (1U << _VCPU_SSHOTTMR_future) + +/* + * Register a memory location in the guest address space for the + * vcpu_info structure. This allows the guest to place the vcpu_info + * structure in a convenient place, such as in a per-cpu data area. + * The pointer need not be page aligned, but the structure must not + * cross a page boundary. + */ +#define VCPUOP_register_vcpu_info 10 /* arg == struct vcpu_info */ +struct vcpu_register_vcpu_info { + uint64_t mfn; /* mfn of page to place vcpu_info */ + uint32_t offset; /* offset within page */ + uint32_t rsvd; /* unused */ +}; +DEFINE_GUEST_HANDLE_STRUCT(vcpu_register_vcpu_info); + +/* Send an NMI to the specified VCPU. @extra_arg == NULL. */ +#define VCPUOP_send_nmi 11 +#endif /* __XEN_PUBLIC_VCPU_H__ */ diff --git a/kernel/include/xen/interface/version.h b/kernel/include/xen/interface/version.h new file mode 100644 index 000000000..7ff649867 --- /dev/null +++ b/kernel/include/xen/interface/version.h @@ -0,0 +1,66 @@ +/****************************************************************************** + * version.h + * + * Xen version, type, and compile information. + * + * Copyright (c) 2005, Nguyen Anh Quynh <aquynh@gmail.com> + * Copyright (c) 2005, Keir Fraser <keir@xensource.com> + */ + +#ifndef __XEN_PUBLIC_VERSION_H__ +#define __XEN_PUBLIC_VERSION_H__ + +/* NB. All ops return zero on success, except XENVER_version. */ + +/* arg == NULL; returns major:minor (16:16). */ +#define XENVER_version 0 + +/* arg == xen_extraversion_t. */ +#define XENVER_extraversion 1 +struct xen_extraversion { + char extraversion[16]; +}; +#define XEN_EXTRAVERSION_LEN (sizeof(struct xen_extraversion)) + +/* arg == xen_compile_info_t. */ +#define XENVER_compile_info 2 +struct xen_compile_info { + char compiler[64]; + char compile_by[16]; + char compile_domain[32]; + char compile_date[32]; +}; + +#define XENVER_capabilities 3 +struct xen_capabilities_info { + char info[1024]; +}; +#define XEN_CAPABILITIES_INFO_LEN (sizeof(struct xen_capabilities_info)) + +#define XENVER_changeset 4 +struct xen_changeset_info { + char info[64]; +}; +#define XEN_CHANGESET_INFO_LEN (sizeof(struct xen_changeset_info)) + +#define XENVER_platform_parameters 5 +struct xen_platform_parameters { + xen_ulong_t virt_start; +}; + +#define XENVER_get_features 6 +struct xen_feature_info { + unsigned int submap_idx; /* IN: which 32-bit submap to return */ + uint32_t submap; /* OUT: 32-bit submap */ +}; + +/* Declares the features reported by XENVER_get_features. */ +#include <xen/interface/features.h> + +/* arg == NULL; returns host memory page size. */ +#define XENVER_pagesize 7 + +/* arg == xen_domain_handle_t. */ +#define XENVER_guest_handle 8 + +#endif /* __XEN_PUBLIC_VERSION_H__ */ diff --git a/kernel/include/xen/interface/xen-mca.h b/kernel/include/xen/interface/xen-mca.h new file mode 100644 index 000000000..73a4ea714 --- /dev/null +++ b/kernel/include/xen/interface/xen-mca.h @@ -0,0 +1,385 @@ +/****************************************************************************** + * arch-x86/mca.h + * Guest OS machine check interface to x86 Xen. + * + * Contributed by Advanced Micro Devices, Inc. + * Author: Christoph Egger <Christoph.Egger@amd.com> + * + * Updated by Intel Corporation + * Author: Liu, Jinsong <jinsong.liu@intel.com> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#ifndef __XEN_PUBLIC_ARCH_X86_MCA_H__ +#define __XEN_PUBLIC_ARCH_X86_MCA_H__ + +/* Hypercall */ +#define __HYPERVISOR_mca __HYPERVISOR_arch_0 + +#define XEN_MCA_INTERFACE_VERSION 0x01ecc003 + +/* IN: Dom0 calls hypercall to retrieve nonurgent error log entry */ +#define XEN_MC_NONURGENT 0x1 +/* IN: Dom0 calls hypercall to retrieve urgent error log entry */ +#define XEN_MC_URGENT 0x2 +/* IN: Dom0 acknowledges previosly-fetched error log entry */ +#define XEN_MC_ACK 0x4 + +/* OUT: All is ok */ +#define XEN_MC_OK 0x0 +/* OUT: Domain could not fetch data. */ +#define XEN_MC_FETCHFAILED 0x1 +/* OUT: There was no machine check data to fetch. */ +#define XEN_MC_NODATA 0x2 + +#ifndef __ASSEMBLY__ +/* vIRQ injected to Dom0 */ +#define VIRQ_MCA VIRQ_ARCH_0 + +/* + * mc_info entry types + * mca machine check info are recorded in mc_info entries. + * when fetch mca info, it can use MC_TYPE_... to distinguish + * different mca info. + */ +#define MC_TYPE_GLOBAL 0 +#define MC_TYPE_BANK 1 +#define MC_TYPE_EXTENDED 2 +#define MC_TYPE_RECOVERY 3 + +struct mcinfo_common { + uint16_t type; /* structure type */ + uint16_t size; /* size of this struct in bytes */ +}; + +#define MC_FLAG_CORRECTABLE (1 << 0) +#define MC_FLAG_UNCORRECTABLE (1 << 1) +#define MC_FLAG_RECOVERABLE (1 << 2) +#define MC_FLAG_POLLED (1 << 3) +#define MC_FLAG_RESET (1 << 4) +#define MC_FLAG_CMCI (1 << 5) +#define MC_FLAG_MCE (1 << 6) + +/* contains x86 global mc information */ +struct mcinfo_global { + struct mcinfo_common common; + + uint16_t mc_domid; /* running domain at the time in error */ + uint16_t mc_vcpuid; /* virtual cpu scheduled for mc_domid */ + uint32_t mc_socketid; /* physical socket of the physical core */ + uint16_t mc_coreid; /* physical impacted core */ + uint16_t mc_core_threadid; /* core thread of physical core */ + uint32_t mc_apicid; + uint32_t mc_flags; + uint64_t mc_gstatus; /* global status */ +}; + +/* contains x86 bank mc information */ +struct mcinfo_bank { + struct mcinfo_common common; + + uint16_t mc_bank; /* bank nr */ + uint16_t mc_domid; /* domain referenced by mc_addr if valid */ + uint64_t mc_status; /* bank status */ + uint64_t mc_addr; /* bank address */ + uint64_t mc_misc; + uint64_t mc_ctrl2; + uint64_t mc_tsc; +}; + +struct mcinfo_msr { + uint64_t reg; /* MSR */ + uint64_t value; /* MSR value */ +}; + +/* contains mc information from other or additional mc MSRs */ +struct mcinfo_extended { + struct mcinfo_common common; + uint32_t mc_msrs; /* Number of msr with valid values. */ + /* + * Currently Intel extended MSR (32/64) include all gp registers + * and E(R)FLAGS, E(R)IP, E(R)MISC, up to 11/19 of them might be + * useful at present. So expand this array to 16/32 to leave room. + */ + struct mcinfo_msr mc_msr[sizeof(void *) * 4]; +}; + +/* Recovery Action flags. Giving recovery result information to DOM0 */ + +/* Xen takes successful recovery action, the error is recovered */ +#define REC_ACTION_RECOVERED (0x1 << 0) +/* No action is performed by XEN */ +#define REC_ACTION_NONE (0x1 << 1) +/* It's possible DOM0 might take action ownership in some case */ +#define REC_ACTION_NEED_RESET (0x1 << 2) + +/* + * Different Recovery Action types, if the action is performed successfully, + * REC_ACTION_RECOVERED flag will be returned. + */ + +/* Page Offline Action */ +#define MC_ACTION_PAGE_OFFLINE (0x1 << 0) +/* CPU offline Action */ +#define MC_ACTION_CPU_OFFLINE (0x1 << 1) +/* L3 cache disable Action */ +#define MC_ACTION_CACHE_SHRINK (0x1 << 2) + +/* + * Below interface used between XEN/DOM0 for passing XEN's recovery action + * information to DOM0. + */ +struct page_offline_action { + /* Params for passing the offlined page number to DOM0 */ + uint64_t mfn; + uint64_t status; +}; + +struct cpu_offline_action { + /* Params for passing the identity of the offlined CPU to DOM0 */ + uint32_t mc_socketid; + uint16_t mc_coreid; + uint16_t mc_core_threadid; +}; + +#define MAX_UNION_SIZE 16 +struct mcinfo_recovery { + struct mcinfo_common common; + uint16_t mc_bank; /* bank nr */ + uint8_t action_flags; + uint8_t action_types; + union { + struct page_offline_action page_retire; + struct cpu_offline_action cpu_offline; + uint8_t pad[MAX_UNION_SIZE]; + } action_info; +}; + + +#define MCINFO_MAXSIZE 768 +struct mc_info { + /* Number of mcinfo_* entries in mi_data */ + uint32_t mi_nentries; + uint32_t flags; + uint64_t mi_data[(MCINFO_MAXSIZE - 1) / 8]; +}; +DEFINE_GUEST_HANDLE_STRUCT(mc_info); + +#define __MC_MSR_ARRAYSIZE 8 +#define __MC_MSR_MCGCAP 0 +#define __MC_NMSRS 1 +#define MC_NCAPS 7 +struct mcinfo_logical_cpu { + uint32_t mc_cpunr; + uint32_t mc_chipid; + uint16_t mc_coreid; + uint16_t mc_threadid; + uint32_t mc_apicid; + uint32_t mc_clusterid; + uint32_t mc_ncores; + uint32_t mc_ncores_active; + uint32_t mc_nthreads; + uint32_t mc_cpuid_level; + uint32_t mc_family; + uint32_t mc_vendor; + uint32_t mc_model; + uint32_t mc_step; + char mc_vendorid[16]; + char mc_brandid[64]; + uint32_t mc_cpu_caps[MC_NCAPS]; + uint32_t mc_cache_size; + uint32_t mc_cache_alignment; + uint32_t mc_nmsrvals; + struct mcinfo_msr mc_msrvalues[__MC_MSR_ARRAYSIZE]; +}; +DEFINE_GUEST_HANDLE_STRUCT(mcinfo_logical_cpu); + +/* + * Prototype: + * uint32_t x86_mcinfo_nentries(struct mc_info *mi); + */ +#define x86_mcinfo_nentries(_mi) \ + ((_mi)->mi_nentries) +/* + * Prototype: + * struct mcinfo_common *x86_mcinfo_first(struct mc_info *mi); + */ +#define x86_mcinfo_first(_mi) \ + ((struct mcinfo_common *)(_mi)->mi_data) +/* + * Prototype: + * struct mcinfo_common *x86_mcinfo_next(struct mcinfo_common *mic); + */ +#define x86_mcinfo_next(_mic) \ + ((struct mcinfo_common *)((uint8_t *)(_mic) + (_mic)->size)) + +/* + * Prototype: + * void x86_mcinfo_lookup(void *ret, struct mc_info *mi, uint16_t type); + */ +static inline void x86_mcinfo_lookup(struct mcinfo_common **ret, + struct mc_info *mi, uint16_t type) +{ + uint32_t i; + struct mcinfo_common *mic; + bool found = 0; + + if (!ret || !mi) + return; + + mic = x86_mcinfo_first(mi); + for (i = 0; i < x86_mcinfo_nentries(mi); i++) { + if (mic->type == type) { + found = 1; + break; + } + mic = x86_mcinfo_next(mic); + } + + *ret = found ? mic : NULL; +} + +/* + * Fetch machine check data from hypervisor. + */ +#define XEN_MC_fetch 1 +struct xen_mc_fetch { + /* + * IN: XEN_MC_NONURGENT, XEN_MC_URGENT, + * XEN_MC_ACK if ack'king an earlier fetch + * OUT: XEN_MC_OK, XEN_MC_FETCHAILED, XEN_MC_NODATA + */ + uint32_t flags; + uint32_t _pad0; + /* OUT: id for ack, IN: id we are ack'ing */ + uint64_t fetch_id; + + /* OUT variables. */ + GUEST_HANDLE(mc_info) data; +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_mc_fetch); + + +/* + * This tells the hypervisor to notify a DomU about the machine check error + */ +#define XEN_MC_notifydomain 2 +struct xen_mc_notifydomain { + /* IN variables */ + uint16_t mc_domid; /* The unprivileged domain to notify */ + uint16_t mc_vcpuid; /* The vcpu in mc_domid to notify */ + + /* IN/OUT variables */ + uint32_t flags; +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_mc_notifydomain); + +#define XEN_MC_physcpuinfo 3 +struct xen_mc_physcpuinfo { + /* IN/OUT */ + uint32_t ncpus; + uint32_t _pad0; + /* OUT */ + GUEST_HANDLE(mcinfo_logical_cpu) info; +}; + +#define XEN_MC_msrinject 4 +#define MC_MSRINJ_MAXMSRS 8 +struct xen_mc_msrinject { + /* IN */ + uint32_t mcinj_cpunr; /* target processor id */ + uint32_t mcinj_flags; /* see MC_MSRINJ_F_* below */ + uint32_t mcinj_count; /* 0 .. count-1 in array are valid */ + uint32_t _pad0; + struct mcinfo_msr mcinj_msr[MC_MSRINJ_MAXMSRS]; +}; + +/* Flags for mcinj_flags above; bits 16-31 are reserved */ +#define MC_MSRINJ_F_INTERPOSE 0x1 + +#define XEN_MC_mceinject 5 +struct xen_mc_mceinject { + unsigned int mceinj_cpunr; /* target processor id */ +}; + +struct xen_mc { + uint32_t cmd; + uint32_t interface_version; /* XEN_MCA_INTERFACE_VERSION */ + union { + struct xen_mc_fetch mc_fetch; + struct xen_mc_notifydomain mc_notifydomain; + struct xen_mc_physcpuinfo mc_physcpuinfo; + struct xen_mc_msrinject mc_msrinject; + struct xen_mc_mceinject mc_mceinject; + } u; +}; +DEFINE_GUEST_HANDLE_STRUCT(xen_mc); + +/* Fields are zero when not available */ +struct xen_mce { + __u64 status; + __u64 misc; + __u64 addr; + __u64 mcgstatus; + __u64 ip; + __u64 tsc; /* cpu time stamp counter */ + __u64 time; /* wall time_t when error was detected */ + __u8 cpuvendor; /* cpu vendor as encoded in system.h */ + __u8 inject_flags; /* software inject flags */ + __u16 pad; + __u32 cpuid; /* CPUID 1 EAX */ + __u8 cs; /* code segment */ + __u8 bank; /* machine check bank */ + __u8 cpu; /* cpu number; obsolete; use extcpu now */ + __u8 finished; /* entry is valid */ + __u32 extcpu; /* linux cpu number that detected the error */ + __u32 socketid; /* CPU socket ID */ + __u32 apicid; /* CPU initial apic ID */ + __u64 mcgcap; /* MCGCAP MSR: machine check capabilities of CPU */ +}; + +/* + * This structure contains all data related to the MCE log. Also + * carries a signature to make it easier to find from external + * debugging tools. Each entry is only valid when its finished flag + * is set. + */ + +#define XEN_MCE_LOG_LEN 32 + +struct xen_mce_log { + char signature[12]; /* "MACHINECHECK" */ + unsigned len; /* = XEN_MCE_LOG_LEN */ + unsigned next; + unsigned flags; + unsigned recordlen; /* length of struct xen_mce */ + struct xen_mce entry[XEN_MCE_LOG_LEN]; +}; + +#define XEN_MCE_OVERFLOW 0 /* bit 0 in flags means overflow */ + +#define XEN_MCE_LOG_SIGNATURE "MACHINECHECK" + +#define MCE_GET_RECORD_LEN _IOR('M', 1, int) +#define MCE_GET_LOG_LEN _IOR('M', 2, int) +#define MCE_GETCLEAR_FLAGS _IOR('M', 3, int) + +#endif /* __ASSEMBLY__ */ +#endif /* __XEN_PUBLIC_ARCH_X86_MCA_H__ */ diff --git a/kernel/include/xen/interface/xen.h b/kernel/include/xen/interface/xen.h new file mode 100644 index 000000000..a48378958 --- /dev/null +++ b/kernel/include/xen/interface/xen.h @@ -0,0 +1,758 @@ +/****************************************************************************** + * xen.h + * + * Guest OS interface to Xen. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Copyright (c) 2004, K A Fraser + */ + +#ifndef __XEN_PUBLIC_XEN_H__ +#define __XEN_PUBLIC_XEN_H__ + +#include <asm/xen/interface.h> + +/* + * XEN "SYSTEM CALLS" (a.k.a. HYPERCALLS). + */ + +/* + * x86_32: EAX = vector; EBX, ECX, EDX, ESI, EDI = args 1, 2, 3, 4, 5. + * EAX = return value + * (argument registers may be clobbered on return) + * x86_64: RAX = vector; RDI, RSI, RDX, R10, R8, R9 = args 1, 2, 3, 4, 5, 6. + * RAX = return value + * (argument registers not clobbered on return; RCX, R11 are) + */ +#define __HYPERVISOR_set_trap_table 0 +#define __HYPERVISOR_mmu_update 1 +#define __HYPERVISOR_set_gdt 2 +#define __HYPERVISOR_stack_switch 3 +#define __HYPERVISOR_set_callbacks 4 +#define __HYPERVISOR_fpu_taskswitch 5 +#define __HYPERVISOR_sched_op_compat 6 +#define __HYPERVISOR_dom0_op 7 +#define __HYPERVISOR_set_debugreg 8 +#define __HYPERVISOR_get_debugreg 9 +#define __HYPERVISOR_update_descriptor 10 +#define __HYPERVISOR_memory_op 12 +#define __HYPERVISOR_multicall 13 +#define __HYPERVISOR_update_va_mapping 14 +#define __HYPERVISOR_set_timer_op 15 +#define __HYPERVISOR_event_channel_op_compat 16 +#define __HYPERVISOR_xen_version 17 +#define __HYPERVISOR_console_io 18 +#define __HYPERVISOR_physdev_op_compat 19 +#define __HYPERVISOR_grant_table_op 20 +#define __HYPERVISOR_vm_assist 21 +#define __HYPERVISOR_update_va_mapping_otherdomain 22 +#define __HYPERVISOR_iret 23 /* x86 only */ +#define __HYPERVISOR_vcpu_op 24 +#define __HYPERVISOR_set_segment_base 25 /* x86/64 only */ +#define __HYPERVISOR_mmuext_op 26 +#define __HYPERVISOR_xsm_op 27 +#define __HYPERVISOR_nmi_op 28 +#define __HYPERVISOR_sched_op 29 +#define __HYPERVISOR_callback_op 30 +#define __HYPERVISOR_xenoprof_op 31 +#define __HYPERVISOR_event_channel_op 32 +#define __HYPERVISOR_physdev_op 33 +#define __HYPERVISOR_hvm_op 34 +#define __HYPERVISOR_sysctl 35 +#define __HYPERVISOR_domctl 36 +#define __HYPERVISOR_kexec_op 37 +#define __HYPERVISOR_tmem_op 38 +#define __HYPERVISOR_xc_reserved_op 39 /* reserved for XenClient */ + +/* Architecture-specific hypercall definitions. */ +#define __HYPERVISOR_arch_0 48 +#define __HYPERVISOR_arch_1 49 +#define __HYPERVISOR_arch_2 50 +#define __HYPERVISOR_arch_3 51 +#define __HYPERVISOR_arch_4 52 +#define __HYPERVISOR_arch_5 53 +#define __HYPERVISOR_arch_6 54 +#define __HYPERVISOR_arch_7 55 + +/* + * VIRTUAL INTERRUPTS + * + * Virtual interrupts that a guest OS may receive from Xen. + * In the side comments, 'V.' denotes a per-VCPU VIRQ while 'G.' denotes a + * global VIRQ. The former can be bound once per VCPU and cannot be re-bound. + * The latter can be allocated only once per guest: they must initially be + * allocated to VCPU0 but can subsequently be re-bound. + */ +#define VIRQ_TIMER 0 /* V. Timebase update, and/or requested timeout. */ +#define VIRQ_DEBUG 1 /* V. Request guest to dump debug info. */ +#define VIRQ_CONSOLE 2 /* G. (DOM0) Bytes received on emergency console. */ +#define VIRQ_DOM_EXC 3 /* G. (DOM0) Exceptional event for some domain. */ +#define VIRQ_TBUF 4 /* G. (DOM0) Trace buffer has records available. */ +#define VIRQ_DEBUGGER 6 /* G. (DOM0) A domain has paused for debugging. */ +#define VIRQ_XENOPROF 7 /* V. XenOprofile interrupt: new sample available */ +#define VIRQ_CON_RING 8 /* G. (DOM0) Bytes received on console */ +#define VIRQ_PCPU_STATE 9 /* G. (DOM0) PCPU state changed */ +#define VIRQ_MEM_EVENT 10 /* G. (DOM0) A memory event has occured */ +#define VIRQ_XC_RESERVED 11 /* G. Reserved for XenClient */ +#define VIRQ_ENOMEM 12 /* G. (DOM0) Low on heap memory */ + +/* Architecture-specific VIRQ definitions. */ +#define VIRQ_ARCH_0 16 +#define VIRQ_ARCH_1 17 +#define VIRQ_ARCH_2 18 +#define VIRQ_ARCH_3 19 +#define VIRQ_ARCH_4 20 +#define VIRQ_ARCH_5 21 +#define VIRQ_ARCH_6 22 +#define VIRQ_ARCH_7 23 + +#define NR_VIRQS 24 + +/* + * enum neg_errnoval HYPERVISOR_mmu_update(const struct mmu_update reqs[], + * unsigned count, unsigned *done_out, + * unsigned foreigndom) + * @reqs is an array of mmu_update_t structures ((ptr, val) pairs). + * @count is the length of the above array. + * @pdone is an output parameter indicating number of completed operations + * @foreigndom[15:0]: FD, the expected owner of data pages referenced in this + * hypercall invocation. Can be DOMID_SELF. + * @foreigndom[31:16]: PFD, the expected owner of pagetable pages referenced + * in this hypercall invocation. The value of this field + * (x) encodes the PFD as follows: + * x == 0 => PFD == DOMID_SELF + * x != 0 => PFD == x - 1 + * + * Sub-commands: ptr[1:0] specifies the appropriate MMU_* command. + * ------------- + * ptr[1:0] == MMU_NORMAL_PT_UPDATE: + * Updates an entry in a page table belonging to PFD. If updating an L1 table, + * and the new table entry is valid/present, the mapped frame must belong to + * FD. If attempting to map an I/O page then the caller assumes the privilege + * of the FD. + * FD == DOMID_IO: Permit /only/ I/O mappings, at the priv level of the caller. + * FD == DOMID_XEN: Map restricted areas of Xen's heap space. + * ptr[:2] -- Machine address of the page-table entry to modify. + * val -- Value to write. + * + * There also certain implicit requirements when using this hypercall. The + * pages that make up a pagetable must be mapped read-only in the guest. + * This prevents uncontrolled guest updates to the pagetable. Xen strictly + * enforces this, and will disallow any pagetable update which will end up + * mapping pagetable page RW, and will disallow using any writable page as a + * pagetable. In practice it means that when constructing a page table for a + * process, thread, etc, we MUST be very dilligient in following these rules: + * 1). Start with top-level page (PGD or in Xen language: L4). Fill out + * the entries. + * 2). Keep on going, filling out the upper (PUD or L3), and middle (PMD + * or L2). + * 3). Start filling out the PTE table (L1) with the PTE entries. Once + * done, make sure to set each of those entries to RO (so writeable bit + * is unset). Once that has been completed, set the PMD (L2) for this + * PTE table as RO. + * 4). When completed with all of the PMD (L2) entries, and all of them have + * been set to RO, make sure to set RO the PUD (L3). Do the same + * operation on PGD (L4) pagetable entries that have a PUD (L3) entry. + * 5). Now before you can use those pages (so setting the cr3), you MUST also + * pin them so that the hypervisor can verify the entries. This is done + * via the HYPERVISOR_mmuext_op(MMUEXT_PIN_L4_TABLE, guest physical frame + * number of the PGD (L4)). And this point the HYPERVISOR_mmuext_op( + * MMUEXT_NEW_BASEPTR, guest physical frame number of the PGD (L4)) can be + * issued. + * For 32-bit guests, the L4 is not used (as there is less pagetables), so + * instead use L3. + * At this point the pagetables can be modified using the MMU_NORMAL_PT_UPDATE + * hypercall. Also if so desired the OS can also try to write to the PTE + * and be trapped by the hypervisor (as the PTE entry is RO). + * + * To deallocate the pages, the operations are the reverse of the steps + * mentioned above. The argument is MMUEXT_UNPIN_TABLE for all levels and the + * pagetable MUST not be in use (meaning that the cr3 is not set to it). + * + * ptr[1:0] == MMU_MACHPHYS_UPDATE: + * Updates an entry in the machine->pseudo-physical mapping table. + * ptr[:2] -- Machine address within the frame whose mapping to modify. + * The frame must belong to the FD, if one is specified. + * val -- Value to write into the mapping entry. + * + * ptr[1:0] == MMU_PT_UPDATE_PRESERVE_AD: + * As MMU_NORMAL_PT_UPDATE above, but A/D bits currently in the PTE are ORed + * with those in @val. + * + * @val is usually the machine frame number along with some attributes. + * The attributes by default follow the architecture defined bits. Meaning that + * if this is a X86_64 machine and four page table layout is used, the layout + * of val is: + * - 63 if set means No execute (NX) + * - 46-13 the machine frame number + * - 12 available for guest + * - 11 available for guest + * - 10 available for guest + * - 9 available for guest + * - 8 global + * - 7 PAT (PSE is disabled, must use hypercall to make 4MB or 2MB pages) + * - 6 dirty + * - 5 accessed + * - 4 page cached disabled + * - 3 page write through + * - 2 userspace accessible + * - 1 writeable + * - 0 present + * + * The one bits that does not fit with the default layout is the PAGE_PSE + * also called PAGE_PAT). The MMUEXT_[UN]MARK_SUPER arguments to the + * HYPERVISOR_mmuext_op serve as mechanism to set a pagetable to be 4MB + * (or 2MB) instead of using the PAGE_PSE bit. + * + * The reason that the PAGE_PSE (bit 7) is not being utilized is due to Xen + * using it as the Page Attribute Table (PAT) bit - for details on it please + * refer to Intel SDM 10.12. The PAT allows to set the caching attributes of + * pages instead of using MTRRs. + * + * The PAT MSR is as follows (it is a 64-bit value, each entry is 8 bits): + * PAT4 PAT0 + * +-----+-----+----+----+----+-----+----+----+ + * | UC | UC- | WC | WB | UC | UC- | WC | WB | <= Linux + * +-----+-----+----+----+----+-----+----+----+ + * | UC | UC- | WT | WB | UC | UC- | WT | WB | <= BIOS (default when machine boots) + * +-----+-----+----+----+----+-----+----+----+ + * | rsv | rsv | WP | WC | UC | UC- | WT | WB | <= Xen + * +-----+-----+----+----+----+-----+----+----+ + * + * The lookup of this index table translates to looking up + * Bit 7, Bit 4, and Bit 3 of val entry: + * + * PAT/PSE (bit 7) ... PCD (bit 4) .. PWT (bit 3). + * + * If all bits are off, then we are using PAT0. If bit 3 turned on, + * then we are using PAT1, if bit 3 and bit 4, then PAT2.. + * + * As you can see, the Linux PAT1 translates to PAT4 under Xen. Which means + * that if a guest that follows Linux's PAT setup and would like to set Write + * Combined on pages it MUST use PAT4 entry. Meaning that Bit 7 (PAGE_PAT) is + * set. For example, under Linux it only uses PAT0, PAT1, and PAT2 for the + * caching as: + * + * WB = none (so PAT0) + * WC = PWT (bit 3 on) + * UC = PWT | PCD (bit 3 and 4 are on). + * + * To make it work with Xen, it needs to translate the WC bit as so: + * + * PWT (so bit 3 on) --> PAT (so bit 7 is on) and clear bit 3 + * + * And to translate back it would: + * + * PAT (bit 7 on) --> PWT (bit 3 on) and clear bit 7. + */ +#define MMU_NORMAL_PT_UPDATE 0 /* checked '*ptr = val'. ptr is MA. */ +#define MMU_MACHPHYS_UPDATE 1 /* ptr = MA of frame to modify entry for */ +#define MMU_PT_UPDATE_PRESERVE_AD 2 /* atomically: *ptr = val | (*ptr&(A|D)) */ + +/* + * MMU EXTENDED OPERATIONS + * + * enum neg_errnoval HYPERVISOR_mmuext_op(mmuext_op_t uops[], + * unsigned int count, + * unsigned int *pdone, + * unsigned int foreigndom) + */ +/* HYPERVISOR_mmuext_op() accepts a list of mmuext_op structures. + * A foreigndom (FD) can be specified (or DOMID_SELF for none). + * Where the FD has some effect, it is described below. + * + * cmd: MMUEXT_(UN)PIN_*_TABLE + * mfn: Machine frame number to be (un)pinned as a p.t. page. + * The frame must belong to the FD, if one is specified. + * + * cmd: MMUEXT_NEW_BASEPTR + * mfn: Machine frame number of new page-table base to install in MMU. + * + * cmd: MMUEXT_NEW_USER_BASEPTR [x86/64 only] + * mfn: Machine frame number of new page-table base to install in MMU + * when in user space. + * + * cmd: MMUEXT_TLB_FLUSH_LOCAL + * No additional arguments. Flushes local TLB. + * + * cmd: MMUEXT_INVLPG_LOCAL + * linear_addr: Linear address to be flushed from the local TLB. + * + * cmd: MMUEXT_TLB_FLUSH_MULTI + * vcpumask: Pointer to bitmap of VCPUs to be flushed. + * + * cmd: MMUEXT_INVLPG_MULTI + * linear_addr: Linear address to be flushed. + * vcpumask: Pointer to bitmap of VCPUs to be flushed. + * + * cmd: MMUEXT_TLB_FLUSH_ALL + * No additional arguments. Flushes all VCPUs' TLBs. + * + * cmd: MMUEXT_INVLPG_ALL + * linear_addr: Linear address to be flushed from all VCPUs' TLBs. + * + * cmd: MMUEXT_FLUSH_CACHE + * No additional arguments. Writes back and flushes cache contents. + * + * cmd: MMUEXT_FLUSH_CACHE_GLOBAL + * No additional arguments. Writes back and flushes cache contents + * on all CPUs in the system. + * + * cmd: MMUEXT_SET_LDT + * linear_addr: Linear address of LDT base (NB. must be page-aligned). + * nr_ents: Number of entries in LDT. + * + * cmd: MMUEXT_CLEAR_PAGE + * mfn: Machine frame number to be cleared. + * + * cmd: MMUEXT_COPY_PAGE + * mfn: Machine frame number of the destination page. + * src_mfn: Machine frame number of the source page. + * + * cmd: MMUEXT_[UN]MARK_SUPER + * mfn: Machine frame number of head of superpage to be [un]marked. + */ +#define MMUEXT_PIN_L1_TABLE 0 +#define MMUEXT_PIN_L2_TABLE 1 +#define MMUEXT_PIN_L3_TABLE 2 +#define MMUEXT_PIN_L4_TABLE 3 +#define MMUEXT_UNPIN_TABLE 4 +#define MMUEXT_NEW_BASEPTR 5 +#define MMUEXT_TLB_FLUSH_LOCAL 6 +#define MMUEXT_INVLPG_LOCAL 7 +#define MMUEXT_TLB_FLUSH_MULTI 8 +#define MMUEXT_INVLPG_MULTI 9 +#define MMUEXT_TLB_FLUSH_ALL 10 +#define MMUEXT_INVLPG_ALL 11 +#define MMUEXT_FLUSH_CACHE 12 +#define MMUEXT_SET_LDT 13 +#define MMUEXT_NEW_USER_BASEPTR 15 +#define MMUEXT_CLEAR_PAGE 16 +#define MMUEXT_COPY_PAGE 17 +#define MMUEXT_FLUSH_CACHE_GLOBAL 18 +#define MMUEXT_MARK_SUPER 19 +#define MMUEXT_UNMARK_SUPER 20 + +#ifndef __ASSEMBLY__ +struct mmuext_op { + unsigned int cmd; + union { + /* [UN]PIN_TABLE, NEW_BASEPTR, NEW_USER_BASEPTR + * CLEAR_PAGE, COPY_PAGE, [UN]MARK_SUPER */ + xen_pfn_t mfn; + /* INVLPG_LOCAL, INVLPG_ALL, SET_LDT */ + unsigned long linear_addr; + } arg1; + union { + /* SET_LDT */ + unsigned int nr_ents; + /* TLB_FLUSH_MULTI, INVLPG_MULTI */ + void *vcpumask; + /* COPY_PAGE */ + xen_pfn_t src_mfn; + } arg2; +}; +DEFINE_GUEST_HANDLE_STRUCT(mmuext_op); +#endif + +/* These are passed as 'flags' to update_va_mapping. They can be ORed. */ +/* When specifying UVMF_MULTI, also OR in a pointer to a CPU bitmap. */ +/* UVMF_LOCAL is merely UVMF_MULTI with a NULL bitmap pointer. */ +#define UVMF_NONE (0UL<<0) /* No flushing at all. */ +#define UVMF_TLB_FLUSH (1UL<<0) /* Flush entire TLB(s). */ +#define UVMF_INVLPG (2UL<<0) /* Flush only one entry. */ +#define UVMF_FLUSHTYPE_MASK (3UL<<0) +#define UVMF_MULTI (0UL<<2) /* Flush subset of TLBs. */ +#define UVMF_LOCAL (0UL<<2) /* Flush local TLB. */ +#define UVMF_ALL (1UL<<2) /* Flush all TLBs. */ + +/* + * Commands to HYPERVISOR_console_io(). + */ +#define CONSOLEIO_write 0 +#define CONSOLEIO_read 1 + +/* + * Commands to HYPERVISOR_vm_assist(). + */ +#define VMASST_CMD_enable 0 +#define VMASST_CMD_disable 1 + +/* x86/32 guests: simulate full 4GB segment limits. */ +#define VMASST_TYPE_4gb_segments 0 + +/* x86/32 guests: trap (vector 15) whenever above vmassist is used. */ +#define VMASST_TYPE_4gb_segments_notify 1 + +/* + * x86 guests: support writes to bottom-level PTEs. + * NB1. Page-directory entries cannot be written. + * NB2. Guest must continue to remove all writable mappings of PTEs. + */ +#define VMASST_TYPE_writable_pagetables 2 + +/* x86/PAE guests: support PDPTs above 4GB. */ +#define VMASST_TYPE_pae_extended_cr3 3 + +#define MAX_VMASST_TYPE 3 + +#ifndef __ASSEMBLY__ + +typedef uint16_t domid_t; + +/* Domain ids >= DOMID_FIRST_RESERVED cannot be used for ordinary domains. */ +#define DOMID_FIRST_RESERVED (0x7FF0U) + +/* DOMID_SELF is used in certain contexts to refer to oneself. */ +#define DOMID_SELF (0x7FF0U) + +/* + * DOMID_IO is used to restrict page-table updates to mapping I/O memory. + * Although no Foreign Domain need be specified to map I/O pages, DOMID_IO + * is useful to ensure that no mappings to the OS's own heap are accidentally + * installed. (e.g., in Linux this could cause havoc as reference counts + * aren't adjusted on the I/O-mapping code path). + * This only makes sense in MMUEXT_SET_FOREIGNDOM, but in that context can + * be specified by any calling domain. + */ +#define DOMID_IO (0x7FF1U) + +/* + * DOMID_XEN is used to allow privileged domains to map restricted parts of + * Xen's heap space (e.g., the machine_to_phys table). + * This only makes sense in MMUEXT_SET_FOREIGNDOM, and is only permitted if + * the caller is privileged. + */ +#define DOMID_XEN (0x7FF2U) + +/* DOMID_COW is used as the owner of sharable pages */ +#define DOMID_COW (0x7FF3U) + +/* DOMID_INVALID is used to identify pages with unknown owner. */ +#define DOMID_INVALID (0x7FF4U) + +/* Idle domain. */ +#define DOMID_IDLE (0x7FFFU) + +/* + * Send an array of these to HYPERVISOR_mmu_update(). + * NB. The fields are natural pointer/address size for this architecture. + */ +struct mmu_update { + uint64_t ptr; /* Machine address of PTE. */ + uint64_t val; /* New contents of PTE. */ +}; +DEFINE_GUEST_HANDLE_STRUCT(mmu_update); + +/* + * Send an array of these to HYPERVISOR_multicall(). + * NB. The fields are logically the natural register size for this + * architecture. In cases where xen_ulong_t is larger than this then + * any unused bits in the upper portion must be zero. + */ +struct multicall_entry { + xen_ulong_t op; + xen_long_t result; + xen_ulong_t args[6]; +}; +DEFINE_GUEST_HANDLE_STRUCT(multicall_entry); + +struct vcpu_time_info { + /* + * Updates to the following values are preceded and followed + * by an increment of 'version'. The guest can therefore + * detect updates by looking for changes to 'version'. If the + * least-significant bit of the version number is set then an + * update is in progress and the guest must wait to read a + * consistent set of values. The correct way to interact with + * the version number is similar to Linux's seqlock: see the + * implementations of read_seqbegin/read_seqretry. + */ + uint32_t version; + uint32_t pad0; + uint64_t tsc_timestamp; /* TSC at last update of time vals. */ + uint64_t system_time; /* Time, in nanosecs, since boot. */ + /* + * Current system time: + * system_time + ((tsc - tsc_timestamp) << tsc_shift) * tsc_to_system_mul + * CPU frequency (Hz): + * ((10^9 << 32) / tsc_to_system_mul) >> tsc_shift + */ + uint32_t tsc_to_system_mul; + int8_t tsc_shift; + int8_t pad1[3]; +}; /* 32 bytes */ + +struct vcpu_info { + /* + * 'evtchn_upcall_pending' is written non-zero by Xen to indicate + * a pending notification for a particular VCPU. It is then cleared + * by the guest OS /before/ checking for pending work, thus avoiding + * a set-and-check race. Note that the mask is only accessed by Xen + * on the CPU that is currently hosting the VCPU. This means that the + * pending and mask flags can be updated by the guest without special + * synchronisation (i.e., no need for the x86 LOCK prefix). + * This may seem suboptimal because if the pending flag is set by + * a different CPU then an IPI may be scheduled even when the mask + * is set. However, note: + * 1. The task of 'interrupt holdoff' is covered by the per-event- + * channel mask bits. A 'noisy' event that is continually being + * triggered can be masked at source at this very precise + * granularity. + * 2. The main purpose of the per-VCPU mask is therefore to restrict + * reentrant execution: whether for concurrency control, or to + * prevent unbounded stack usage. Whatever the purpose, we expect + * that the mask will be asserted only for short periods at a time, + * and so the likelihood of a 'spurious' IPI is suitably small. + * The mask is read before making an event upcall to the guest: a + * non-zero mask therefore guarantees that the VCPU will not receive + * an upcall activation. The mask is cleared when the VCPU requests + * to block: this avoids wakeup-waiting races. + */ + uint8_t evtchn_upcall_pending; + uint8_t evtchn_upcall_mask; + xen_ulong_t evtchn_pending_sel; + struct arch_vcpu_info arch; + struct pvclock_vcpu_time_info time; +}; /* 64 bytes (x86) */ + +/* + * Xen/kernel shared data -- pointer provided in start_info. + * NB. We expect that this struct is smaller than a page. + */ +struct shared_info { + struct vcpu_info vcpu_info[MAX_VIRT_CPUS]; + + /* + * A domain can create "event channels" on which it can send and receive + * asynchronous event notifications. There are three classes of event that + * are delivered by this mechanism: + * 1. Bi-directional inter- and intra-domain connections. Domains must + * arrange out-of-band to set up a connection (usually by allocating + * an unbound 'listener' port and avertising that via a storage service + * such as xenstore). + * 2. Physical interrupts. A domain with suitable hardware-access + * privileges can bind an event-channel port to a physical interrupt + * source. + * 3. Virtual interrupts ('events'). A domain can bind an event-channel + * port to a virtual interrupt source, such as the virtual-timer + * device or the emergency console. + * + * Event channels are addressed by a "port index". Each channel is + * associated with two bits of information: + * 1. PENDING -- notifies the domain that there is a pending notification + * to be processed. This bit is cleared by the guest. + * 2. MASK -- if this bit is clear then a 0->1 transition of PENDING + * will cause an asynchronous upcall to be scheduled. This bit is only + * updated by the guest. It is read-only within Xen. If a channel + * becomes pending while the channel is masked then the 'edge' is lost + * (i.e., when the channel is unmasked, the guest must manually handle + * pending notifications as no upcall will be scheduled by Xen). + * + * To expedite scanning of pending notifications, any 0->1 pending + * transition on an unmasked channel causes a corresponding bit in a + * per-vcpu selector word to be set. Each bit in the selector covers a + * 'C long' in the PENDING bitfield array. + */ + xen_ulong_t evtchn_pending[sizeof(xen_ulong_t) * 8]; + xen_ulong_t evtchn_mask[sizeof(xen_ulong_t) * 8]; + + /* + * Wallclock time: updated only by control software. Guests should base + * their gettimeofday() syscall on this wallclock-base value. + */ + struct pvclock_wall_clock wc; + + struct arch_shared_info arch; + +}; + +/* + * Start-of-day memory layout for the initial domain (DOM0): + * 1. The domain is started within contiguous virtual-memory region. + * 2. The contiguous region begins and ends on an aligned 4MB boundary. + * 3. The region start corresponds to the load address of the OS image. + * If the load address is not 4MB aligned then the address is rounded down. + * 4. This the order of bootstrap elements in the initial virtual region: + * a. relocated kernel image + * b. initial ram disk [mod_start, mod_len] + * c. list of allocated page frames [mfn_list, nr_pages] + * d. start_info_t structure [register ESI (x86)] + * e. bootstrap page tables [pt_base, CR3 (x86)] + * f. bootstrap stack [register ESP (x86)] + * 5. Bootstrap elements are packed together, but each is 4kB-aligned. + * 6. The initial ram disk may be omitted. + * 7. The list of page frames forms a contiguous 'pseudo-physical' memory + * layout for the domain. In particular, the bootstrap virtual-memory + * region is a 1:1 mapping to the first section of the pseudo-physical map. + * 8. All bootstrap elements are mapped read-writable for the guest OS. The + * only exception is the bootstrap page table, which is mapped read-only. + * 9. There is guaranteed to be at least 512kB padding after the final + * bootstrap element. If necessary, the bootstrap virtual region is + * extended by an extra 4MB to ensure this. + */ + +#define MAX_GUEST_CMDLINE 1024 +struct start_info { + /* THE FOLLOWING ARE FILLED IN BOTH ON INITIAL BOOT AND ON RESUME. */ + char magic[32]; /* "xen-<version>-<platform>". */ + unsigned long nr_pages; /* Total pages allocated to this domain. */ + unsigned long shared_info; /* MACHINE address of shared info struct. */ + uint32_t flags; /* SIF_xxx flags. */ + xen_pfn_t store_mfn; /* MACHINE page number of shared page. */ + uint32_t store_evtchn; /* Event channel for store communication. */ + union { + struct { + xen_pfn_t mfn; /* MACHINE page number of console page. */ + uint32_t evtchn; /* Event channel for console page. */ + } domU; + struct { + uint32_t info_off; /* Offset of console_info struct. */ + uint32_t info_size; /* Size of console_info struct from start.*/ + } dom0; + } console; + /* THE FOLLOWING ARE ONLY FILLED IN ON INITIAL BOOT (NOT RESUME). */ + unsigned long pt_base; /* VIRTUAL address of page directory. */ + unsigned long nr_pt_frames; /* Number of bootstrap p.t. frames. */ + unsigned long mfn_list; /* VIRTUAL address of page-frame list. */ + unsigned long mod_start; /* VIRTUAL address of pre-loaded module. */ + unsigned long mod_len; /* Size (bytes) of pre-loaded module. */ + int8_t cmd_line[MAX_GUEST_CMDLINE]; + /* The pfn range here covers both page table and p->m table frames. */ + unsigned long first_p2m_pfn;/* 1st pfn forming initial P->M table. */ + unsigned long nr_p2m_frames;/* # of pfns forming initial P->M table. */ +}; + +/* These flags are passed in the 'flags' field of start_info_t. */ +#define SIF_PRIVILEGED (1<<0) /* Is the domain privileged? */ +#define SIF_INITDOMAIN (1<<1) /* Is this the initial control domain? */ +#define SIF_MULTIBOOT_MOD (1<<2) /* Is mod_start a multiboot module? */ +#define SIF_MOD_START_PFN (1<<3) /* Is mod_start a PFN? */ +#define SIF_PM_MASK (0xFF<<8) /* reserve 1 byte for xen-pm options */ + +/* + * A multiboot module is a package containing modules very similar to a + * multiboot module array. The only differences are: + * - the array of module descriptors is by convention simply at the beginning + * of the multiboot module, + * - addresses in the module descriptors are based on the beginning of the + * multiboot module, + * - the number of modules is determined by a termination descriptor that has + * mod_start == 0. + * + * This permits to both build it statically and reference it in a configuration + * file, and let the PV guest easily rebase the addresses to virtual addresses + * and at the same time count the number of modules. + */ +struct xen_multiboot_mod_list { + /* Address of first byte of the module */ + uint32_t mod_start; + /* Address of last byte of the module (inclusive) */ + uint32_t mod_end; + /* Address of zero-terminated command line */ + uint32_t cmdline; + /* Unused, must be zero */ + uint32_t pad; +}; +/* + * The console structure in start_info.console.dom0 + * + * This structure includes a variety of information required to + * have a working VGA/VESA console. + */ +struct dom0_vga_console_info { + uint8_t video_type; +#define XEN_VGATYPE_TEXT_MODE_3 0x03 +#define XEN_VGATYPE_VESA_LFB 0x23 +#define XEN_VGATYPE_EFI_LFB 0x70 + + union { + struct { + /* Font height, in pixels. */ + uint16_t font_height; + /* Cursor location (column, row). */ + uint16_t cursor_x, cursor_y; + /* Number of rows and columns (dimensions in characters). */ + uint16_t rows, columns; + } text_mode_3; + + struct { + /* Width and height, in pixels. */ + uint16_t width, height; + /* Bytes per scan line. */ + uint16_t bytes_per_line; + /* Bits per pixel. */ + uint16_t bits_per_pixel; + /* LFB physical address, and size (in units of 64kB). */ + uint32_t lfb_base; + uint32_t lfb_size; + /* RGB mask offsets and sizes, as defined by VBE 1.2+ */ + uint8_t red_pos, red_size; + uint8_t green_pos, green_size; + uint8_t blue_pos, blue_size; + uint8_t rsvd_pos, rsvd_size; + + /* VESA capabilities (offset 0xa, VESA command 0x4f00). */ + uint32_t gbl_caps; + /* Mode attributes (offset 0x0, VESA command 0x4f01). */ + uint16_t mode_attrs; + } vesa_lfb; + } u; +}; + +typedef uint64_t cpumap_t; + +typedef uint8_t xen_domain_handle_t[16]; + +/* Turn a plain number into a C unsigned long constant. */ +#define __mk_unsigned_long(x) x ## UL +#define mk_unsigned_long(x) __mk_unsigned_long(x) + +#define TMEM_SPEC_VERSION 1 + +struct tmem_op { + uint32_t cmd; + int32_t pool_id; + union { + struct { /* for cmd == TMEM_NEW_POOL */ + uint64_t uuid[2]; + uint32_t flags; + } new; + struct { + uint64_t oid[3]; + uint32_t index; + uint32_t tmem_offset; + uint32_t pfn_offset; + uint32_t len; + GUEST_HANDLE(void) gmfn; /* guest machine page frame */ + } gen; + } u; +}; + +DEFINE_GUEST_HANDLE(u64); + +#else /* __ASSEMBLY__ */ + +/* In assembly code we cannot use C numeric constant suffixes. */ +#define mk_unsigned_long(x) x + +#endif /* !__ASSEMBLY__ */ + +#endif /* __XEN_PUBLIC_XEN_H__ */ diff --git a/kernel/include/xen/page.h b/kernel/include/xen/page.h new file mode 100644 index 000000000..c5ed20bb3 --- /dev/null +++ b/kernel/include/xen/page.h @@ -0,0 +1,23 @@ +#ifndef _XEN_PAGE_H +#define _XEN_PAGE_H + +#include <asm/xen/page.h> + +static inline unsigned long page_to_mfn(struct page *page) +{ + return pfn_to_mfn(page_to_pfn(page)); +} + +struct xen_memory_region { + phys_addr_t start; + phys_addr_t size; +}; + +#define XEN_EXTRA_MEM_MAX_REGIONS 128 /* == E820MAX */ + +extern __initdata +struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS]; + +extern unsigned long xen_released_pages; + +#endif /* _XEN_PAGE_H */ diff --git a/kernel/include/xen/platform_pci.h b/kernel/include/xen/platform_pci.h new file mode 100644 index 000000000..5c52b5583 --- /dev/null +++ b/kernel/include/xen/platform_pci.h @@ -0,0 +1,72 @@ +#ifndef _XEN_PLATFORM_PCI_H +#define _XEN_PLATFORM_PCI_H + +#define XEN_IOPORT_MAGIC_VAL 0x49d2 +#define XEN_IOPORT_LINUX_PRODNUM 0x0003 +#define XEN_IOPORT_LINUX_DRVVER 0x0001 + +#define XEN_IOPORT_BASE 0x10 + +#define XEN_IOPORT_PLATFLAGS (XEN_IOPORT_BASE + 0) /* 1 byte access (R/W) */ +#define XEN_IOPORT_MAGIC (XEN_IOPORT_BASE + 0) /* 2 byte access (R) */ +#define XEN_IOPORT_UNPLUG (XEN_IOPORT_BASE + 0) /* 2 byte access (W) */ +#define XEN_IOPORT_DRVVER (XEN_IOPORT_BASE + 0) /* 4 byte access (W) */ + +#define XEN_IOPORT_SYSLOG (XEN_IOPORT_BASE + 2) /* 1 byte access (W) */ +#define XEN_IOPORT_PROTOVER (XEN_IOPORT_BASE + 2) /* 1 byte access (R) */ +#define XEN_IOPORT_PRODNUM (XEN_IOPORT_BASE + 2) /* 2 byte access (W) */ + +#define XEN_UNPLUG_ALL_IDE_DISKS (1<<0) +#define XEN_UNPLUG_ALL_NICS (1<<1) +#define XEN_UNPLUG_AUX_IDE_DISKS (1<<2) +#define XEN_UNPLUG_ALL (XEN_UNPLUG_ALL_IDE_DISKS|\ + XEN_UNPLUG_ALL_NICS|\ + XEN_UNPLUG_AUX_IDE_DISKS) + +#define XEN_UNPLUG_UNNECESSARY (1<<16) +#define XEN_UNPLUG_NEVER (1<<17) + +static inline int xen_must_unplug_nics(void) { +#if (defined(CONFIG_XEN_NETDEV_FRONTEND) || \ + defined(CONFIG_XEN_NETDEV_FRONTEND_MODULE)) && \ + defined(CONFIG_XEN_PVHVM) + return 1; +#else + return 0; +#endif +} + +static inline int xen_must_unplug_disks(void) { +#if (defined(CONFIG_XEN_BLKDEV_FRONTEND) || \ + defined(CONFIG_XEN_BLKDEV_FRONTEND_MODULE)) && \ + defined(CONFIG_XEN_PVHVM) + return 1; +#else + return 0; +#endif +} + +#if defined(CONFIG_XEN_PVHVM) +extern bool xen_has_pv_devices(void); +extern bool xen_has_pv_disk_devices(void); +extern bool xen_has_pv_nic_devices(void); +extern bool xen_has_pv_and_legacy_disk_devices(void); +#else +static inline bool xen_has_pv_devices(void) +{ + return IS_ENABLED(CONFIG_XEN); +} +static inline bool xen_has_pv_disk_devices(void) +{ + return IS_ENABLED(CONFIG_XEN); +} +static inline bool xen_has_pv_nic_devices(void) +{ + return IS_ENABLED(CONFIG_XEN); +} +static inline bool xen_has_pv_and_legacy_disk_devices(void) +{ + return false; +} +#endif +#endif /* _XEN_PLATFORM_PCI_H */ diff --git a/kernel/include/xen/swiotlb-xen.h b/kernel/include/xen/swiotlb-xen.h new file mode 100644 index 000000000..8b2eb93ae --- /dev/null +++ b/kernel/include/xen/swiotlb-xen.h @@ -0,0 +1,61 @@ +#ifndef __LINUX_SWIOTLB_XEN_H +#define __LINUX_SWIOTLB_XEN_H + +#include <linux/dma-direction.h> +#include <linux/swiotlb.h> + +extern int xen_swiotlb_init(int verbose, bool early); + +extern void +*xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size, + dma_addr_t *dma_handle, gfp_t flags, + struct dma_attrs *attrs); + +extern void +xen_swiotlb_free_coherent(struct device *hwdev, size_t size, + void *vaddr, dma_addr_t dma_handle, + struct dma_attrs *attrs); + +extern dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction dir, + struct dma_attrs *attrs); + +extern void xen_swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, + size_t size, enum dma_data_direction dir, + struct dma_attrs *attrs); +extern int +xen_swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, + int nelems, enum dma_data_direction dir, + struct dma_attrs *attrs); + +extern void +xen_swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, + int nelems, enum dma_data_direction dir, + struct dma_attrs *attrs); + +extern void +xen_swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, + size_t size, enum dma_data_direction dir); + +extern void +xen_swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, + int nelems, enum dma_data_direction dir); + +extern void +xen_swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, + size_t size, enum dma_data_direction dir); + +extern void +xen_swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, + int nelems, enum dma_data_direction dir); + +extern int +xen_swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); + +extern int +xen_swiotlb_dma_supported(struct device *hwdev, u64 mask); + +extern int +xen_swiotlb_set_dma_mask(struct device *dev, u64 dma_mask); +#endif /* __LINUX_SWIOTLB_XEN_H */ diff --git a/kernel/include/xen/tmem.h b/kernel/include/xen/tmem.h new file mode 100644 index 000000000..3930a9004 --- /dev/null +++ b/kernel/include/xen/tmem.h @@ -0,0 +1,17 @@ +#ifndef _XEN_TMEM_H +#define _XEN_TMEM_H + +#include <linux/types.h> + +#ifdef CONFIG_XEN_TMEM_MODULE +#define tmem_enabled true +#else +/* defined in drivers/xen/tmem.c */ +extern bool tmem_enabled; +#endif + +#ifdef CONFIG_XEN_SELFBALLOONING +extern int xen_selfballoon_init(bool, bool); +#endif + +#endif /* _XEN_TMEM_H */ diff --git a/kernel/include/xen/xen-ops.h b/kernel/include/xen/xen-ops.h new file mode 100644 index 000000000..0ce4f3201 --- /dev/null +++ b/kernel/include/xen/xen-ops.h @@ -0,0 +1,121 @@ +#ifndef INCLUDE_XEN_OPS_H +#define INCLUDE_XEN_OPS_H + +#include <linux/percpu.h> +#include <linux/notifier.h> +#include <linux/efi.h> +#include <asm/xen/interface.h> + +DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu); + +void xen_arch_pre_suspend(void); +void xen_arch_post_suspend(int suspend_cancelled); + +void xen_timer_resume(void); +void xen_arch_resume(void); +void xen_arch_suspend(void); + +void xen_resume_notifier_register(struct notifier_block *nb); +void xen_resume_notifier_unregister(struct notifier_block *nb); + +int xen_setup_shutdown_event(void); + +extern unsigned long *xen_contiguous_bitmap; +int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order, + unsigned int address_bits, + dma_addr_t *dma_handle); + +void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order); + +struct vm_area_struct; + +/* + * xen_remap_domain_mfn_array() - map an array of foreign frames + * @vma: VMA to map the pages into + * @addr: Address at which to map the pages + * @gfn: Array of GFNs to map + * @nr: Number entries in the GFN array + * @err_ptr: Returns per-GFN error status. + * @prot: page protection mask + * @domid: Domain owning the pages + * @pages: Array of pages if this domain has an auto-translated physmap + * + * @gfn and @err_ptr may point to the same buffer, the GFNs will be + * overwritten by the error codes after they are mapped. + * + * Returns the number of successfully mapped frames, or a -ve error + * code. + */ +int xen_remap_domain_mfn_array(struct vm_area_struct *vma, + unsigned long addr, + xen_pfn_t *gfn, int nr, + int *err_ptr, pgprot_t prot, + unsigned domid, + struct page **pages); + +/* xen_remap_domain_mfn_range() - map a range of foreign frames + * @vma: VMA to map the pages into + * @addr: Address at which to map the pages + * @gfn: First GFN to map. + * @nr: Number frames to map + * @prot: page protection mask + * @domid: Domain owning the pages + * @pages: Array of pages if this domain has an auto-translated physmap + * + * Returns the number of successfully mapped frames, or a -ve error + * code. + */ +int xen_remap_domain_mfn_range(struct vm_area_struct *vma, + unsigned long addr, + xen_pfn_t gfn, int nr, + pgprot_t prot, unsigned domid, + struct page **pages); +int xen_unmap_domain_mfn_range(struct vm_area_struct *vma, + int numpgs, struct page **pages); +int xen_xlate_remap_gfn_array(struct vm_area_struct *vma, + unsigned long addr, + xen_pfn_t *gfn, int nr, + int *err_ptr, pgprot_t prot, + unsigned domid, + struct page **pages); +int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma, + int nr, struct page **pages); + +bool xen_running_on_version_or_later(unsigned int major, unsigned int minor); + +#ifdef CONFIG_XEN_EFI +extern efi_system_table_t *xen_efi_probe(void); +#else +static inline efi_system_table_t __init *xen_efi_probe(void) +{ + return NULL; +} +#endif + +#ifdef CONFIG_PREEMPT + +static inline void xen_preemptible_hcall_begin(void) +{ +} + +static inline void xen_preemptible_hcall_end(void) +{ +} + +#else + +DECLARE_PER_CPU(bool, xen_in_preemptible_hcall); + +static inline void xen_preemptible_hcall_begin(void) +{ + __this_cpu_write(xen_in_preemptible_hcall, true); +} + +static inline void xen_preemptible_hcall_end(void) +{ + __this_cpu_write(xen_in_preemptible_hcall, false); +} + +#endif /* CONFIG_PREEMPT */ + +#endif /* INCLUDE_XEN_OPS_H */ diff --git a/kernel/include/xen/xen.h b/kernel/include/xen/xen.h new file mode 100644 index 000000000..0c0e3ef4c --- /dev/null +++ b/kernel/include/xen/xen.h @@ -0,0 +1,46 @@ +#ifndef _XEN_XEN_H +#define _XEN_XEN_H + +enum xen_domain_type { + XEN_NATIVE, /* running on bare hardware */ + XEN_PV_DOMAIN, /* running in a PV domain */ + XEN_HVM_DOMAIN, /* running in a Xen hvm domain */ +}; + +#ifdef CONFIG_XEN +extern enum xen_domain_type xen_domain_type; +#else +#define xen_domain_type XEN_NATIVE +#endif + +#define xen_domain() (xen_domain_type != XEN_NATIVE) +#define xen_pv_domain() (xen_domain() && \ + xen_domain_type == XEN_PV_DOMAIN) +#define xen_hvm_domain() (xen_domain() && \ + xen_domain_type == XEN_HVM_DOMAIN) + +#ifdef CONFIG_XEN_DOM0 +#include <xen/interface/xen.h> +#include <asm/xen/hypervisor.h> + +#define xen_initial_domain() (xen_domain() && \ + xen_start_info && xen_start_info->flags & SIF_INITDOMAIN) +#else /* !CONFIG_XEN_DOM0 */ +#define xen_initial_domain() (0) +#endif /* CONFIG_XEN_DOM0 */ + +#ifdef CONFIG_XEN_PVH +/* This functionality exists only for x86. The XEN_PVHVM support exists + * only in x86 world - hence on ARM it will be always disabled. + * N.B. ARM guests are neither PV nor HVM nor PVHVM. + * It's a bit like PVH but is different also (it's further towards the H + * end of the spectrum than even PVH). + */ +#include <xen/features.h> +#define xen_pvh_domain() (xen_pv_domain() && \ + xen_feature(XENFEAT_auto_translated_physmap) && \ + xen_have_vector_callback) +#else +#define xen_pvh_domain() (0) +#endif +#endif /* _XEN_XEN_H */ diff --git a/kernel/include/xen/xenbus.h b/kernel/include/xen/xenbus.h new file mode 100644 index 000000000..289c0b5f0 --- /dev/null +++ b/kernel/include/xen/xenbus.h @@ -0,0 +1,234 @@ +/****************************************************************************** + * xenbus.h + * + * Talks to Xen Store to figure out what devices we have. + * + * Copyright (C) 2005 Rusty Russell, IBM Corporation + * Copyright (C) 2005 XenSource Ltd. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation; or, when distributed + * separately from the Linux kernel or incorporated into other + * software packages, subject to the following license: + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this source file (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, modify, + * merge, publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef _XEN_XENBUS_H +#define _XEN_XENBUS_H + +#include <linux/device.h> +#include <linux/notifier.h> +#include <linux/mutex.h> +#include <linux/export.h> +#include <linux/completion.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <xen/interface/xen.h> +#include <xen/interface/grant_table.h> +#include <xen/interface/io/xenbus.h> +#include <xen/interface/io/xs_wire.h> + +#define XENBUS_MAX_RING_PAGE_ORDER 4 +#define XENBUS_MAX_RING_PAGES (1U << XENBUS_MAX_RING_PAGE_ORDER) +#define INVALID_GRANT_HANDLE (~0U) + +/* Register callback to watch this node. */ +struct xenbus_watch +{ + struct list_head list; + + /* Path being watched. */ + const char *node; + + /* Callback (executed in a process context with no locks held). */ + void (*callback)(struct xenbus_watch *, + const char **vec, unsigned int len); +}; + + +/* A xenbus device. */ +struct xenbus_device { + const char *devicetype; + const char *nodename; + const char *otherend; + int otherend_id; + struct xenbus_watch otherend_watch; + struct device dev; + enum xenbus_state state; + struct completion down; + struct work_struct work; +}; + +static inline struct xenbus_device *to_xenbus_device(struct device *dev) +{ + return container_of(dev, struct xenbus_device, dev); +} + +struct xenbus_device_id +{ + /* .../device/<device_type>/<identifier> */ + char devicetype[32]; /* General class of device. */ +}; + +/* A xenbus driver. */ +struct xenbus_driver { + const char *name; /* defaults to ids[0].devicetype */ + const struct xenbus_device_id *ids; + int (*probe)(struct xenbus_device *dev, + const struct xenbus_device_id *id); + void (*otherend_changed)(struct xenbus_device *dev, + enum xenbus_state backend_state); + int (*remove)(struct xenbus_device *dev); + int (*suspend)(struct xenbus_device *dev); + int (*resume)(struct xenbus_device *dev); + int (*uevent)(struct xenbus_device *, struct kobj_uevent_env *); + struct device_driver driver; + int (*read_otherend_details)(struct xenbus_device *dev); + int (*is_ready)(struct xenbus_device *dev); +}; + +static inline struct xenbus_driver *to_xenbus_driver(struct device_driver *drv) +{ + return container_of(drv, struct xenbus_driver, driver); +} + +int __must_check __xenbus_register_frontend(struct xenbus_driver *drv, + struct module *owner, + const char *mod_name); +int __must_check __xenbus_register_backend(struct xenbus_driver *drv, + struct module *owner, + const char *mod_name); + +#define xenbus_register_frontend(drv) \ + __xenbus_register_frontend(drv, THIS_MODULE, KBUILD_MODNAME) +#define xenbus_register_backend(drv) \ + __xenbus_register_backend(drv, THIS_MODULE, KBUILD_MODNAME) + +void xenbus_unregister_driver(struct xenbus_driver *drv); + +struct xenbus_transaction +{ + u32 id; +}; + +/* Nil transaction ID. */ +#define XBT_NIL ((struct xenbus_transaction) { 0 }) + +char **xenbus_directory(struct xenbus_transaction t, + const char *dir, const char *node, unsigned int *num); +void *xenbus_read(struct xenbus_transaction t, + const char *dir, const char *node, unsigned int *len); +int xenbus_write(struct xenbus_transaction t, + const char *dir, const char *node, const char *string); +int xenbus_mkdir(struct xenbus_transaction t, + const char *dir, const char *node); +int xenbus_exists(struct xenbus_transaction t, + const char *dir, const char *node); +int xenbus_rm(struct xenbus_transaction t, const char *dir, const char *node); +int xenbus_transaction_start(struct xenbus_transaction *t); +int xenbus_transaction_end(struct xenbus_transaction t, int abort); + +/* Single read and scanf: returns -errno or num scanned if > 0. */ +__scanf(4, 5) +int xenbus_scanf(struct xenbus_transaction t, + const char *dir, const char *node, const char *fmt, ...); + +/* Single printf and write: returns -errno or 0. */ +__printf(4, 5) +int xenbus_printf(struct xenbus_transaction t, + const char *dir, const char *node, const char *fmt, ...); + +/* Generic read function: NULL-terminated triples of name, + * sprintf-style type string, and pointer. Returns 0 or errno.*/ +int xenbus_gather(struct xenbus_transaction t, const char *dir, ...); + +/* notifer routines for when the xenstore comes up */ +extern int xenstored_ready; +int register_xenstore_notifier(struct notifier_block *nb); +void unregister_xenstore_notifier(struct notifier_block *nb); + +int register_xenbus_watch(struct xenbus_watch *watch); +void unregister_xenbus_watch(struct xenbus_watch *watch); +void xs_suspend(void); +void xs_resume(void); +void xs_suspend_cancel(void); + +/* Used by xenbus_dev to borrow kernel's store connection. */ +void *xenbus_dev_request_and_reply(struct xsd_sockmsg *msg); + +struct work_struct; + +/* Prepare for domain suspend: then resume or cancel the suspend. */ +void xenbus_suspend(void); +void xenbus_resume(void); +void xenbus_probe(struct work_struct *); +void xenbus_suspend_cancel(void); + +#define XENBUS_IS_ERR_READ(str) ({ \ + if (!IS_ERR(str) && strlen(str) == 0) { \ + kfree(str); \ + str = ERR_PTR(-ERANGE); \ + } \ + IS_ERR(str); \ +}) + +#define XENBUS_EXIST_ERR(err) ((err) == -ENOENT || (err) == -ERANGE) + +int xenbus_watch_path(struct xenbus_device *dev, const char *path, + struct xenbus_watch *watch, + void (*callback)(struct xenbus_watch *, + const char **, unsigned int)); +__printf(4, 5) +int xenbus_watch_pathfmt(struct xenbus_device *dev, struct xenbus_watch *watch, + void (*callback)(struct xenbus_watch *, + const char **, unsigned int), + const char *pathfmt, ...); + +int xenbus_switch_state(struct xenbus_device *dev, enum xenbus_state new_state); +int xenbus_grant_ring(struct xenbus_device *dev, void *vaddr, + unsigned int nr_pages, grant_ref_t *grefs); +int xenbus_map_ring_valloc(struct xenbus_device *dev, grant_ref_t *gnt_refs, + unsigned int nr_grefs, void **vaddr); +int xenbus_map_ring(struct xenbus_device *dev, + grant_ref_t *gnt_refs, unsigned int nr_grefs, + grant_handle_t *handles, unsigned long *vaddrs, + bool *leaked); + +int xenbus_unmap_ring_vfree(struct xenbus_device *dev, void *vaddr); +int xenbus_unmap_ring(struct xenbus_device *dev, + grant_handle_t *handles, unsigned int nr_handles, + unsigned long *vaddrs); + +int xenbus_alloc_evtchn(struct xenbus_device *dev, int *port); +int xenbus_free_evtchn(struct xenbus_device *dev, int port); + +enum xenbus_state xenbus_read_driver_state(const char *path); + +__printf(3, 4) +void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...); +__printf(3, 4) +void xenbus_dev_fatal(struct xenbus_device *dev, int err, const char *fmt, ...); + +const char *xenbus_strstate(enum xenbus_state state); +int xenbus_dev_is_online(struct xenbus_device *dev); +int xenbus_frontend_closed(struct xenbus_device *dev); + +#endif /* _XEN_XENBUS_H */ diff --git a/kernel/include/xen/xenbus_dev.h b/kernel/include/xen/xenbus_dev.h new file mode 100644 index 000000000..bbee8c6a3 --- /dev/null +++ b/kernel/include/xen/xenbus_dev.h @@ -0,0 +1,44 @@ +/****************************************************************************** + * evtchn.h + * + * Interface to /dev/xen/xenbus_backend. + * + * Copyright (c) 2011 Bastian Blank <waldi@debian.org> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation; or, when distributed + * separately from the Linux kernel or incorporated into other + * software packages, subject to the following license: + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this source file (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, modify, + * merge, publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef __LINUX_XEN_XENBUS_DEV_H__ +#define __LINUX_XEN_XENBUS_DEV_H__ + +#include <linux/ioctl.h> + +#define IOCTL_XENBUS_BACKEND_EVTCHN \ + _IOC(_IOC_NONE, 'B', 0, 0) + +#define IOCTL_XENBUS_BACKEND_SETUP \ + _IOC(_IOC_NONE, 'B', 1, 0) + +#endif /* __LINUX_XEN_XENBUS_DEV_H__ */ |