diff options
Diffstat (limited to 'qemu/roms/ipxe/src/arch/x86/drivers/hyperv/hyperv.c')
| -rw-r--r-- | qemu/roms/ipxe/src/arch/x86/drivers/hyperv/hyperv.c | 597 |
1 files changed, 0 insertions, 597 deletions
diff --git a/qemu/roms/ipxe/src/arch/x86/drivers/hyperv/hyperv.c b/qemu/roms/ipxe/src/arch/x86/drivers/hyperv/hyperv.c deleted file mode 100644 index f73829bd5..000000000 --- a/qemu/roms/ipxe/src/arch/x86/drivers/hyperv/hyperv.c +++ /dev/null @@ -1,597 +0,0 @@ -/* - * Copyright (C) 2014 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -/** @file - * - * Hyper-V driver - * - */ - -#include <stdlib.h> -#include <stdarg.h> -#include <string.h> -#include <unistd.h> -#include <assert.h> -#include <errno.h> -#include <byteswap.h> -#include <pic8259.h> -#include <ipxe/malloc.h> -#include <ipxe/device.h> -#include <ipxe/cpuid.h> -#include <ipxe/msr.h> -#include <ipxe/hyperv.h> -#include <ipxe/vmbus.h> -#include "hyperv.h" - -/** Maximum time to wait for a message response - * - * This is a policy decision. - */ -#define HV_MESSAGE_MAX_WAIT_MS 1000 - -/** - * Convert a Hyper-V status code to an iPXE status code - * - * @v status Hyper-V status code - * @ret rc iPXE status code (before negation) - */ -#define EHV( status ) EPLATFORM ( EINFO_EPLATFORM, (status) ) - -/** - * Allocate zeroed pages - * - * @v hv Hyper-V hypervisor - * @v ... Page addresses to fill in, terminated by NULL - * @ret rc Return status code - */ -__attribute__ (( sentinel )) int -hv_alloc_pages ( struct hv_hypervisor *hv, ... ) { - va_list args; - void **page; - int i; - - /* Allocate and zero pages */ - va_start ( args, hv ); - for ( i = 0 ; ( ( page = va_arg ( args, void ** ) ) != NULL ); i++ ) { - *page = malloc_dma ( PAGE_SIZE, PAGE_SIZE ); - if ( ! *page ) - goto err_alloc; - memset ( *page, 0, PAGE_SIZE ); - } - va_end ( args ); - - return 0; - - err_alloc: - va_end ( args ); - va_start ( args, hv ); - for ( ; i >= 0 ; i-- ) { - page = va_arg ( args, void ** ); - free_dma ( *page, PAGE_SIZE ); - } - va_end ( args ); - return -ENOMEM; -} - -/** - * Free pages - * - * @v hv Hyper-V hypervisor - * @v ... Page addresses, terminated by NULL - */ -__attribute__ (( sentinel )) void -hv_free_pages ( struct hv_hypervisor *hv, ... ) { - va_list args; - void *page; - - va_start ( args, hv ); - while ( ( page = va_arg ( args, void * ) ) != NULL ) - free_dma ( page, PAGE_SIZE ); - va_end ( args ); -} - -/** - * Allocate message buffer - * - * @v hv Hyper-V hypervisor - * @ret rc Return status code - */ -static int hv_alloc_message ( struct hv_hypervisor *hv ) { - - /* Allocate buffer. Must be aligned to at least 8 bytes and - * must not cross a page boundary, so align on its own size. - */ - hv->message = malloc_dma ( sizeof ( *hv->message ), - sizeof ( *hv->message ) ); - if ( ! hv->message ) - return -ENOMEM; - - return 0; -} - -/** - * Free message buffer - * - * @v hv Hyper-V hypervisor - */ -static void hv_free_message ( struct hv_hypervisor *hv ) { - - /* Free buffer */ - free_dma ( hv->message, sizeof ( *hv->message ) ); -} - -/** - * Check whether or not we are running in Hyper-V - * - * @v hv Hyper-V hypervisor - * @ret rc Return status code - */ -static int hv_check_hv ( struct hv_hypervisor *hv ) { - struct x86_features features; - uint32_t interface_id; - uint32_t discard_ebx; - uint32_t discard_ecx; - uint32_t discard_edx; - uint32_t available; - uint32_t permissions; - - /* Check for presence of a hypervisor (not necessarily Hyper-V) */ - x86_features ( &features ); - if ( ! ( features.intel.ecx & CPUID_FEATURES_INTEL_ECX_HYPERVISOR ) ) { - DBGC ( hv, "HV %p not running in a hypervisor\n", hv ); - return -ENODEV; - } - - /* Check that hypervisor is Hyper-V */ - cpuid ( HV_CPUID_INTERFACE_ID, &interface_id, &discard_ebx, - &discard_ecx, &discard_edx ); - if ( interface_id != HV_INTERFACE_ID ) { - DBGC ( hv, "HV %p not running in Hyper-V (interface ID " - "%#08x)\n", hv, interface_id ); - return -ENODEV; - } - - /* Check that required features and privileges are available */ - cpuid ( HV_CPUID_FEATURES, &available, &permissions, &discard_ecx, - &discard_edx ); - if ( ! ( available & HV_FEATURES_AVAIL_HYPERCALL_MSR ) ) { - DBGC ( hv, "HV %p has no hypercall MSRs (features %08x:%08x)\n", - hv, available, permissions ); - return -ENODEV; - } - if ( ! ( available & HV_FEATURES_AVAIL_SYNIC_MSR ) ) { - DBGC ( hv, "HV %p has no SynIC MSRs (features %08x:%08x)\n", - hv, available, permissions ); - return -ENODEV; - } - if ( ! ( permissions & HV_FEATURES_PERM_POST_MESSAGES ) ) { - DBGC ( hv, "HV %p cannot post messages (features %08x:%08x)\n", - hv, available, permissions ); - return -EACCES; - } - if ( ! ( permissions & HV_FEATURES_PERM_SIGNAL_EVENTS ) ) { - DBGC ( hv, "HV %p cannot signal events (features %08x:%08x)", - hv, available, permissions ); - return -EACCES; - } - - return 0; -} - -/** - * Map hypercall page - * - * @v hv Hyper-V hypervisor - * @ret rc Return status code - */ -static int hv_map_hypercall ( struct hv_hypervisor *hv ) { - union { - struct { - uint32_t ebx; - uint32_t ecx; - uint32_t edx; - } __attribute__ (( packed )); - char text[ 13 /* "bbbbccccdddd" + NUL */ ]; - } vendor_id; - uint32_t build; - uint32_t version; - uint32_t discard_eax; - uint32_t discard_ecx; - uint32_t discard_edx; - uint64_t guest_os_id; - uint64_t hypercall; - - /* Report guest OS identity */ - guest_os_id = rdmsr ( HV_X64_MSR_GUEST_OS_ID ); - if ( guest_os_id != 0 ) { - DBGC ( hv, "HV %p guest OS ID MSR already set to %#08llx\n", - hv, guest_os_id ); - return -EBUSY; - } - guest_os_id = HV_GUEST_OS_ID_IPXE; - DBGC2 ( hv, "HV %p guest OS ID MSR is %#08llx\n", hv, guest_os_id ); - wrmsr ( HV_X64_MSR_GUEST_OS_ID, guest_os_id ); - - /* Get hypervisor system identity (for debugging) */ - cpuid ( HV_CPUID_VENDOR_ID, &discard_eax, &vendor_id.ebx, - &vendor_id.ecx, &vendor_id.edx ); - vendor_id.text[ sizeof ( vendor_id.text ) - 1 ] = '\0'; - cpuid ( HV_CPUID_HYPERVISOR_ID, &build, &version, &discard_ecx, - &discard_edx ); - DBGC ( hv, "HV %p detected \"%s\" version %d.%d build %d\n", hv, - vendor_id.text, ( version >> 16 ), ( version & 0xffff ), build ); - - /* Map hypercall page */ - hypercall = rdmsr ( HV_X64_MSR_HYPERCALL ); - hypercall &= ( PAGE_SIZE - 1 ); - hypercall |= ( virt_to_phys ( hv->hypercall ) | HV_HYPERCALL_ENABLE ); - DBGC2 ( hv, "HV %p hypercall MSR is %#08llx\n", hv, hypercall ); - wrmsr ( HV_X64_MSR_HYPERCALL, hypercall ); - - return 0; -} - -/** - * Unmap hypercall page - * - * @v hv Hyper-V hypervisor - */ -static void hv_unmap_hypercall ( struct hv_hypervisor *hv ) { - uint64_t hypercall; - uint64_t guest_os_id; - - /* Unmap the hypercall page */ - hypercall = rdmsr ( HV_X64_MSR_HYPERCALL ); - hypercall &= ( ( PAGE_SIZE - 1 ) & ~HV_HYPERCALL_ENABLE ); - DBGC2 ( hv, "HV %p hypercall MSR is %#08llx\n", hv, hypercall ); - wrmsr ( HV_X64_MSR_HYPERCALL, hypercall ); - - /* Reset the guest OS identity */ - guest_os_id = 0; - DBGC2 ( hv, "HV %p guest OS ID MSR is %#08llx\n", hv, guest_os_id ); - wrmsr ( HV_X64_MSR_GUEST_OS_ID, guest_os_id ); -} - -/** - * Map synthetic interrupt controller - * - * @v hv Hyper-V hypervisor - * @ret rc Return status code - */ -static int hv_map_synic ( struct hv_hypervisor *hv ) { - uint64_t simp; - uint64_t siefp; - uint64_t scontrol; - - /* Map SynIC message page */ - simp = rdmsr ( HV_X64_MSR_SIMP ); - simp &= ( PAGE_SIZE - 1 ); - simp |= ( virt_to_phys ( hv->synic.message ) | HV_SIMP_ENABLE ); - DBGC2 ( hv, "HV %p SIMP MSR is %#08llx\n", hv, simp ); - wrmsr ( HV_X64_MSR_SIMP, simp ); - - /* Map SynIC event page */ - siefp = rdmsr ( HV_X64_MSR_SIEFP ); - siefp &= ( PAGE_SIZE - 1 ); - siefp |= ( virt_to_phys ( hv->synic.event ) | HV_SIEFP_ENABLE ); - DBGC2 ( hv, "HV %p SIEFP MSR is %#08llx\n", hv, siefp ); - wrmsr ( HV_X64_MSR_SIEFP, siefp ); - - /* Enable SynIC */ - scontrol = rdmsr ( HV_X64_MSR_SCONTROL ); - scontrol |= HV_SCONTROL_ENABLE; - DBGC2 ( hv, "HV %p SCONTROL MSR is %#08llx\n", hv, scontrol ); - wrmsr ( HV_X64_MSR_SCONTROL, scontrol ); - - return 0; -} - -/** - * Unmap synthetic interrupt controller - * - * @v hv Hyper-V hypervisor - */ -static void hv_unmap_synic ( struct hv_hypervisor *hv ) { - uint64_t scontrol; - uint64_t siefp; - uint64_t simp; - - /* Disable SynIC */ - scontrol = rdmsr ( HV_X64_MSR_SCONTROL ); - scontrol &= ~HV_SCONTROL_ENABLE; - DBGC2 ( hv, "HV %p SCONTROL MSR is %#08llx\n", hv, scontrol ); - wrmsr ( HV_X64_MSR_SCONTROL, scontrol ); - - /* Unmap SynIC event page */ - siefp = rdmsr ( HV_X64_MSR_SIEFP ); - siefp &= ( ( PAGE_SIZE - 1 ) & ~HV_SIEFP_ENABLE ); - DBGC2 ( hv, "HV %p SIEFP MSR is %#08llx\n", hv, siefp ); - wrmsr ( HV_X64_MSR_SIEFP, siefp ); - - /* Unmap SynIC message page */ - simp = rdmsr ( HV_X64_MSR_SIMP ); - simp &= ( ( PAGE_SIZE - 1 ) & ~HV_SIMP_ENABLE ); - DBGC2 ( hv, "HV %p SIMP MSR is %#08llx\n", hv, simp ); - wrmsr ( HV_X64_MSR_SIMP, simp ); -} - -/** - * Enable synthetic interrupt - * - * @v hv Hyper-V hypervisor - * @v sintx Synthetic interrupt number - */ -void hv_enable_sint ( struct hv_hypervisor *hv, unsigned int sintx ) { - unsigned long msr = HV_X64_MSR_SINT ( sintx ); - uint64_t sint; - - /* Enable synthetic interrupt - * - * We have to enable the interrupt, otherwise messages will - * not be delivered (even though the documentation implies - * that polling for messages is possible). We enable AutoEOI - * and hook the interrupt to the obsolete IRQ13 (FPU - * exception) vector, which will be implemented as a no-op. - */ - sint = rdmsr ( msr ); - sint &= ~( HV_SINT_MASKED | HV_SINT_VECTOR_MASK ); - sint |= ( HV_SINT_AUTO_EOI | - HV_SINT_VECTOR ( IRQ_INT ( 13 /* See comment above */ ) ) ); - DBGC2 ( hv, "HV %p SINT%d MSR is %#08llx\n", hv, sintx, sint ); - wrmsr ( msr, sint ); -} - -/** - * Disable synthetic interrupt - * - * @v hv Hyper-V hypervisor - * @v sintx Synthetic interrupt number - */ -void hv_disable_sint ( struct hv_hypervisor *hv, unsigned int sintx ) { - unsigned long msr = HV_X64_MSR_SINT ( sintx ); - uint64_t sint; - - /* Disable synthetic interrupt */ - sint = rdmsr ( msr ); - sint &= ~HV_SINT_AUTO_EOI; - sint |= HV_SINT_MASKED; - DBGC2 ( hv, "HV %p SINT%d MSR is %#08llx\n", hv, sintx, sint ); - wrmsr ( msr, sint ); -} - -/** - * Post message - * - * @v hv Hyper-V hypervisor - * @v id Connection ID - * @v type Message type - * @v data Message - * @v len Length of message - * @ret rc Return status code - */ -int hv_post_message ( struct hv_hypervisor *hv, unsigned int id, - unsigned int type, const void *data, size_t len ) { - struct hv_post_message *msg = &hv->message->posted; - int status; - int rc; - - /* Sanity check */ - assert ( len <= sizeof ( msg->data ) ); - - /* Construct message */ - memset ( msg, 0, sizeof ( *msg ) ); - msg->id = cpu_to_le32 ( id ); - msg->type = cpu_to_le32 ( type ); - msg->len = cpu_to_le32 ( len ); - memcpy ( msg->data, data, len ); - DBGC2 ( hv, "HV %p connection %d posting message type %#08x:\n", - hv, id, type ); - DBGC2_HDA ( hv, 0, msg->data, len ); - - /* Post message */ - if ( ( status = hv_call ( hv, HV_POST_MESSAGE, msg, NULL ) ) != 0 ) { - rc = -EHV ( status ); - DBGC ( hv, "HV %p could not post message to %#08x: %s\n", - hv, id, strerror ( rc ) ); - return rc; - } - - return 0; -} - -/** - * Wait for received message - * - * @v hv Hyper-V hypervisor - * @v sintx Synthetic interrupt number - * @ret rc Return status code - */ -int hv_wait_for_message ( struct hv_hypervisor *hv, unsigned int sintx ) { - struct hv_message *msg = &hv->message->received; - struct hv_message *src = &hv->synic.message[sintx]; - unsigned int retries; - size_t len; - - /* Wait for message to arrive */ - for ( retries = 0 ; retries < HV_MESSAGE_MAX_WAIT_MS ; retries++ ) { - - /* Check for message */ - if ( src->type ) { - - /* Copy message */ - memset ( msg, 0, sizeof ( *msg ) ); - len = src->len; - assert ( len <= sizeof ( *msg ) ); - memcpy ( msg, src, - ( offsetof ( typeof ( *msg ), data ) + len ) ); - DBGC2 ( hv, "HV %p SINT%d received message type " - "%#08x:\n", hv, sintx, - le32_to_cpu ( msg->type ) ); - DBGC2_HDA ( hv, 0, msg->data, len ); - - /* Consume message */ - src->type = 0; - - return 0; - } - - /* Trigger message delivery */ - wrmsr ( HV_X64_MSR_EOM, 0 ); - - /* Delay */ - mdelay ( 1 ); - } - - DBGC ( hv, "HV %p SINT%d timed out waiting for message\n", - hv, sintx ); - return -ETIMEDOUT; -} - -/** - * Signal event - * - * @v hv Hyper-V hypervisor - * @v id Connection ID - * @v flag Flag number - * @ret rc Return status code - */ -int hv_signal_event ( struct hv_hypervisor *hv, unsigned int id, - unsigned int flag ) { - struct hv_signal_event *event = &hv->message->signalled; - int status; - int rc; - - /* Construct event */ - memset ( event, 0, sizeof ( *event ) ); - event->id = cpu_to_le32 ( id ); - event->flag = cpu_to_le16 ( flag ); - - /* Signal event */ - if ( ( status = hv_call ( hv, HV_SIGNAL_EVENT, event, NULL ) ) != 0 ) { - rc = -EHV ( status ); - DBGC ( hv, "HV %p could not signal event to %#08x: %s\n", - hv, id, strerror ( rc ) ); - return rc; - } - - return 0; -} - -/** - * Probe root device - * - * @v rootdev Root device - * @ret rc Return status code - */ -static int hv_probe ( struct root_device *rootdev ) { - struct hv_hypervisor *hv; - int rc; - - /* Allocate and initialise structure */ - hv = zalloc ( sizeof ( *hv ) ); - if ( ! hv ) { - rc = -ENOMEM; - goto err_alloc; - } - - /* Check we are running in Hyper-V */ - if ( ( rc = hv_check_hv ( hv ) ) != 0 ) - goto err_check_hv; - - /* Allocate pages */ - if ( ( rc = hv_alloc_pages ( hv, &hv->hypercall, &hv->synic.message, - &hv->synic.event, NULL ) ) != 0 ) - goto err_alloc_pages; - - /* Allocate message buffer */ - if ( ( rc = hv_alloc_message ( hv ) ) != 0 ) - goto err_alloc_message; - - /* Map hypercall page */ - if ( ( rc = hv_map_hypercall ( hv ) ) != 0 ) - goto err_map_hypercall; - - /* Map synthetic interrupt controller */ - if ( ( rc = hv_map_synic ( hv ) ) != 0 ) - goto err_map_synic; - - /* Probe Hyper-V devices */ - if ( ( rc = vmbus_probe ( hv, &rootdev->dev ) ) != 0 ) - goto err_vmbus_probe; - - rootdev_set_drvdata ( rootdev, hv ); - return 0; - - vmbus_remove ( hv, &rootdev->dev ); - err_vmbus_probe: - hv_unmap_synic ( hv ); - err_map_synic: - hv_unmap_hypercall ( hv ); - err_map_hypercall: - hv_free_message ( hv ); - err_alloc_message: - hv_free_pages ( hv, hv->hypercall, hv->synic.message, hv->synic.event, - NULL ); - err_alloc_pages: - err_check_hv: - free ( hv ); - err_alloc: - return rc; -} - -/** - * Remove root device - * - * @v rootdev Root device - */ -static void hv_remove ( struct root_device *rootdev ) { - struct hv_hypervisor *hv = rootdev_get_drvdata ( rootdev ); - - vmbus_remove ( hv, &rootdev->dev ); - hv_unmap_synic ( hv ); - hv_unmap_hypercall ( hv ); - hv_free_message ( hv ); - hv_free_pages ( hv, hv->hypercall, hv->synic.message, hv->synic.event, - NULL ); - free ( hv ); -} - -/** Hyper-V root device driver */ -static struct root_driver hv_root_driver = { - .probe = hv_probe, - .remove = hv_remove, -}; - -/** Hyper-V root device */ -struct root_device hv_root_device __root_device = { - .dev = { .name = "Hyper-V" }, - .driver = &hv_root_driver, -}; - -/* Drag in objects via hv_root_device */ -REQUIRING_SYMBOL ( hv_root_device ); - -/* Drag in netvsc driver */ -REQUIRE_OBJECT ( netvsc ); |