diff options
Diffstat (limited to 'qemu/hw/xen/xen_pt.c')
| -rw-r--r-- | qemu/hw/xen/xen_pt.c | 974 |
1 files changed, 0 insertions, 974 deletions
diff --git a/qemu/hw/xen/xen_pt.c b/qemu/hw/xen/xen_pt.c deleted file mode 100644 index f593b046e..000000000 --- a/qemu/hw/xen/xen_pt.c +++ /dev/null @@ -1,974 +0,0 @@ -/* - * Copyright (c) 2007, Neocleus Corporation. - * Copyright (c) 2007, Intel Corporation. - * - * This work is licensed under the terms of the GNU GPL, version 2. See - * the COPYING file in the top-level directory. - * - * Alex Novik <alex@neocleus.com> - * Allen Kay <allen.m.kay@intel.com> - * Guy Zana <guy@neocleus.com> - * - * This file implements direct PCI assignment to a HVM guest - */ - -/* - * Interrupt Disable policy: - * - * INTx interrupt: - * Initialize(register_real_device) - * Map INTx(xc_physdev_map_pirq): - * <fail> - * - Set real Interrupt Disable bit to '1'. - * - Set machine_irq and assigned_device->machine_irq to '0'. - * * Don't bind INTx. - * - * Bind INTx(xc_domain_bind_pt_pci_irq): - * <fail> - * - Set real Interrupt Disable bit to '1'. - * - Unmap INTx. - * - Decrement xen_pt_mapped_machine_irq[machine_irq] - * - Set assigned_device->machine_irq to '0'. - * - * Write to Interrupt Disable bit by guest software(xen_pt_cmd_reg_write) - * Write '0' - * - Set real bit to '0' if assigned_device->machine_irq isn't '0'. - * - * Write '1' - * - Set real bit to '1'. - * - * MSI interrupt: - * Initialize MSI register(xen_pt_msi_setup, xen_pt_msi_update) - * Bind MSI(xc_domain_update_msi_irq) - * <fail> - * - Unmap MSI. - * - Set dev->msi->pirq to '-1'. - * - * MSI-X interrupt: - * Initialize MSI-X register(xen_pt_msix_update_one) - * Bind MSI-X(xc_domain_update_msi_irq) - * <fail> - * - Unmap MSI-X. - * - Set entry->pirq to '-1'. - */ - -#include "qemu/osdep.h" -#include "qapi/error.h" -#include <sys/ioctl.h> - -#include "hw/pci/pci.h" -#include "hw/xen/xen.h" -#include "hw/i386/pc.h" -#include "hw/xen/xen_backend.h" -#include "xen_pt.h" -#include "qemu/range.h" -#include "exec/address-spaces.h" - -#define XEN_PT_NR_IRQS (256) -static uint8_t xen_pt_mapped_machine_irq[XEN_PT_NR_IRQS] = {0}; - -void xen_pt_log(const PCIDevice *d, const char *f, ...) -{ - va_list ap; - - va_start(ap, f); - if (d) { - fprintf(stderr, "[%02x:%02x.%d] ", pci_bus_num(d->bus), - PCI_SLOT(d->devfn), PCI_FUNC(d->devfn)); - } - vfprintf(stderr, f, ap); - va_end(ap); -} - -/* Config Space */ - -static int xen_pt_pci_config_access_check(PCIDevice *d, uint32_t addr, int len) -{ - /* check offset range */ - if (addr >= 0xFF) { - XEN_PT_ERR(d, "Failed to access register with offset exceeding 0xFF. " - "(addr: 0x%02x, len: %d)\n", addr, len); - return -1; - } - - /* check read size */ - if ((len != 1) && (len != 2) && (len != 4)) { - XEN_PT_ERR(d, "Failed to access register with invalid access length. " - "(addr: 0x%02x, len: %d)\n", addr, len); - return -1; - } - - /* check offset alignment */ - if (addr & (len - 1)) { - XEN_PT_ERR(d, "Failed to access register with invalid access size " - "alignment. (addr: 0x%02x, len: %d)\n", addr, len); - return -1; - } - - return 0; -} - -int xen_pt_bar_offset_to_index(uint32_t offset) -{ - int index = 0; - - /* check Exp ROM BAR */ - if (offset == PCI_ROM_ADDRESS) { - return PCI_ROM_SLOT; - } - - /* calculate BAR index */ - index = (offset - PCI_BASE_ADDRESS_0) >> 2; - if (index >= PCI_NUM_REGIONS) { - return -1; - } - - return index; -} - -static uint32_t xen_pt_pci_read_config(PCIDevice *d, uint32_t addr, int len) -{ - XenPCIPassthroughState *s = XEN_PT_DEVICE(d); - uint32_t val = 0; - XenPTRegGroup *reg_grp_entry = NULL; - XenPTReg *reg_entry = NULL; - int rc = 0; - int emul_len = 0; - uint32_t find_addr = addr; - - if (xen_pt_pci_config_access_check(d, addr, len)) { - goto exit; - } - - /* find register group entry */ - reg_grp_entry = xen_pt_find_reg_grp(s, addr); - if (reg_grp_entry) { - /* check 0-Hardwired register group */ - if (reg_grp_entry->reg_grp->grp_type == XEN_PT_GRP_TYPE_HARDWIRED) { - /* no need to emulate, just return 0 */ - val = 0; - goto exit; - } - } - - /* read I/O device register value */ - rc = xen_host_pci_get_block(&s->real_device, addr, (uint8_t *)&val, len); - if (rc < 0) { - XEN_PT_ERR(d, "pci_read_block failed. return value: %d.\n", rc); - memset(&val, 0xff, len); - } - - /* just return the I/O device register value for - * passthrough type register group */ - if (reg_grp_entry == NULL) { - goto exit; - } - - /* adjust the read value to appropriate CFC-CFF window */ - val <<= (addr & 3) << 3; - emul_len = len; - - /* loop around the guest requested size */ - while (emul_len > 0) { - /* find register entry to be emulated */ - reg_entry = xen_pt_find_reg(reg_grp_entry, find_addr); - if (reg_entry) { - XenPTRegInfo *reg = reg_entry->reg; - uint32_t real_offset = reg_grp_entry->base_offset + reg->offset; - uint32_t valid_mask = 0xFFFFFFFF >> ((4 - emul_len) << 3); - uint8_t *ptr_val = NULL; - - valid_mask <<= (find_addr - real_offset) << 3; - ptr_val = (uint8_t *)&val + (real_offset & 3); - - /* do emulation based on register size */ - switch (reg->size) { - case 1: - if (reg->u.b.read) { - rc = reg->u.b.read(s, reg_entry, ptr_val, valid_mask); - } - break; - case 2: - if (reg->u.w.read) { - rc = reg->u.w.read(s, reg_entry, - (uint16_t *)ptr_val, valid_mask); - } - break; - case 4: - if (reg->u.dw.read) { - rc = reg->u.dw.read(s, reg_entry, - (uint32_t *)ptr_val, valid_mask); - } - break; - } - - if (rc < 0) { - xen_shutdown_fatal_error("Internal error: Invalid read " - "emulation. (%s, rc: %d)\n", - __func__, rc); - return 0; - } - - /* calculate next address to find */ - emul_len -= reg->size; - if (emul_len > 0) { - find_addr = real_offset + reg->size; - } - } else { - /* nothing to do with passthrough type register, - * continue to find next byte */ - emul_len--; - find_addr++; - } - } - - /* need to shift back before returning them to pci bus emulator */ - val >>= ((addr & 3) << 3); - -exit: - XEN_PT_LOG_CONFIG(d, addr, val, len); - return val; -} - -static void xen_pt_pci_write_config(PCIDevice *d, uint32_t addr, - uint32_t val, int len) -{ - XenPCIPassthroughState *s = XEN_PT_DEVICE(d); - int index = 0; - XenPTRegGroup *reg_grp_entry = NULL; - int rc = 0; - uint32_t read_val = 0, wb_mask; - int emul_len = 0; - XenPTReg *reg_entry = NULL; - uint32_t find_addr = addr; - XenPTRegInfo *reg = NULL; - bool wp_flag = false; - - if (xen_pt_pci_config_access_check(d, addr, len)) { - return; - } - - XEN_PT_LOG_CONFIG(d, addr, val, len); - - /* check unused BAR register */ - index = xen_pt_bar_offset_to_index(addr); - if ((index >= 0) && (val != 0)) { - uint32_t chk = val; - - if (index == PCI_ROM_SLOT) - chk |= (uint32_t)~PCI_ROM_ADDRESS_MASK; - - if ((chk != XEN_PT_BAR_ALLF) && - (s->bases[index].bar_flag == XEN_PT_BAR_FLAG_UNUSED)) { - XEN_PT_WARN(d, "Guest attempt to set address to unused " - "Base Address Register. (addr: 0x%02x, len: %d)\n", - addr, len); - } - } - - /* find register group entry */ - reg_grp_entry = xen_pt_find_reg_grp(s, addr); - if (reg_grp_entry) { - /* check 0-Hardwired register group */ - if (reg_grp_entry->reg_grp->grp_type == XEN_PT_GRP_TYPE_HARDWIRED) { - /* ignore silently */ - XEN_PT_WARN(d, "Access to 0-Hardwired register. " - "(addr: 0x%02x, len: %d)\n", addr, len); - return; - } - } - - rc = xen_host_pci_get_block(&s->real_device, addr, - (uint8_t *)&read_val, len); - if (rc < 0) { - XEN_PT_ERR(d, "pci_read_block failed. return value: %d.\n", rc); - memset(&read_val, 0xff, len); - wb_mask = 0; - } else { - wb_mask = 0xFFFFFFFF >> ((4 - len) << 3); - } - - /* pass directly to the real device for passthrough type register group */ - if (reg_grp_entry == NULL) { - if (!s->permissive) { - wb_mask = 0; - wp_flag = true; - } - goto out; - } - - memory_region_transaction_begin(); - pci_default_write_config(d, addr, val, len); - - /* adjust the read and write value to appropriate CFC-CFF window */ - read_val <<= (addr & 3) << 3; - val <<= (addr & 3) << 3; - emul_len = len; - - /* loop around the guest requested size */ - while (emul_len > 0) { - /* find register entry to be emulated */ - reg_entry = xen_pt_find_reg(reg_grp_entry, find_addr); - if (reg_entry) { - reg = reg_entry->reg; - uint32_t real_offset = reg_grp_entry->base_offset + reg->offset; - uint32_t valid_mask = 0xFFFFFFFF >> ((4 - emul_len) << 3); - uint8_t *ptr_val = NULL; - uint32_t wp_mask = reg->emu_mask | reg->ro_mask; - - valid_mask <<= (find_addr - real_offset) << 3; - ptr_val = (uint8_t *)&val + (real_offset & 3); - if (!s->permissive) { - wp_mask |= reg->res_mask; - } - if (wp_mask == (0xFFFFFFFF >> ((4 - reg->size) << 3))) { - wb_mask &= ~((wp_mask >> ((find_addr - real_offset) << 3)) - << ((len - emul_len) << 3)); - } - - /* do emulation based on register size */ - switch (reg->size) { - case 1: - if (reg->u.b.write) { - rc = reg->u.b.write(s, reg_entry, ptr_val, - read_val >> ((real_offset & 3) << 3), - valid_mask); - } - break; - case 2: - if (reg->u.w.write) { - rc = reg->u.w.write(s, reg_entry, (uint16_t *)ptr_val, - (read_val >> ((real_offset & 3) << 3)), - valid_mask); - } - break; - case 4: - if (reg->u.dw.write) { - rc = reg->u.dw.write(s, reg_entry, (uint32_t *)ptr_val, - (read_val >> ((real_offset & 3) << 3)), - valid_mask); - } - break; - } - - if (rc < 0) { - xen_shutdown_fatal_error("Internal error: Invalid write" - " emulation. (%s, rc: %d)\n", - __func__, rc); - return; - } - - /* calculate next address to find */ - emul_len -= reg->size; - if (emul_len > 0) { - find_addr = real_offset + reg->size; - } - } else { - /* nothing to do with passthrough type register, - * continue to find next byte */ - if (!s->permissive) { - wb_mask &= ~(0xff << ((len - emul_len) << 3)); - /* Unused BARs will make it here, but we don't want to issue - * warnings for writes to them (bogus writes get dealt with - * above). - */ - if (index < 0) { - wp_flag = true; - } - } - emul_len--; - find_addr++; - } - } - - /* need to shift back before passing them to xen_host_pci_set_block. */ - val >>= (addr & 3) << 3; - - memory_region_transaction_commit(); - -out: - if (wp_flag && !s->permissive_warned) { - s->permissive_warned = true; - xen_pt_log(d, "Write-back to unknown field 0x%02x (partially) inhibited (0x%0*x)\n", - addr, len * 2, wb_mask); - xen_pt_log(d, "If the device doesn't work, try enabling permissive mode\n"); - xen_pt_log(d, "(unsafe) and if it helps report the problem to xen-devel\n"); - } - for (index = 0; wb_mask; index += len) { - /* unknown regs are passed through */ - while (!(wb_mask & 0xff)) { - index++; - wb_mask >>= 8; - } - len = 0; - do { - len++; - wb_mask >>= 8; - } while (wb_mask & 0xff); - rc = xen_host_pci_set_block(&s->real_device, addr + index, - (uint8_t *)&val + index, len); - - if (rc < 0) { - XEN_PT_ERR(d, "xen_host_pci_set_block failed. return value: %d.\n", rc); - } - } -} - -/* register regions */ - -static uint64_t xen_pt_bar_read(void *o, hwaddr addr, - unsigned size) -{ - PCIDevice *d = o; - /* if this function is called, that probably means that there is a - * misconfiguration of the IOMMU. */ - XEN_PT_ERR(d, "Should not read BAR through QEMU. @0x"TARGET_FMT_plx"\n", - addr); - return 0; -} -static void xen_pt_bar_write(void *o, hwaddr addr, uint64_t val, - unsigned size) -{ - PCIDevice *d = o; - /* Same comment as xen_pt_bar_read function */ - XEN_PT_ERR(d, "Should not write BAR through QEMU. @0x"TARGET_FMT_plx"\n", - addr); -} - -static const MemoryRegionOps ops = { - .endianness = DEVICE_NATIVE_ENDIAN, - .read = xen_pt_bar_read, - .write = xen_pt_bar_write, -}; - -static int xen_pt_register_regions(XenPCIPassthroughState *s, uint16_t *cmd) -{ - int i = 0; - XenHostPCIDevice *d = &s->real_device; - - /* Register PIO/MMIO BARs */ - for (i = 0; i < PCI_ROM_SLOT; i++) { - XenHostPCIIORegion *r = &d->io_regions[i]; - uint8_t type; - - if (r->base_addr == 0 || r->size == 0) { - continue; - } - - s->bases[i].access.u = r->base_addr; - - if (r->type & XEN_HOST_PCI_REGION_TYPE_IO) { - type = PCI_BASE_ADDRESS_SPACE_IO; - *cmd |= PCI_COMMAND_IO; - } else { - type = PCI_BASE_ADDRESS_SPACE_MEMORY; - if (r->type & XEN_HOST_PCI_REGION_TYPE_PREFETCH) { - type |= PCI_BASE_ADDRESS_MEM_PREFETCH; - } - if (r->type & XEN_HOST_PCI_REGION_TYPE_MEM_64) { - type |= PCI_BASE_ADDRESS_MEM_TYPE_64; - } - *cmd |= PCI_COMMAND_MEMORY; - } - - memory_region_init_io(&s->bar[i], OBJECT(s), &ops, &s->dev, - "xen-pci-pt-bar", r->size); - pci_register_bar(&s->dev, i, type, &s->bar[i]); - - XEN_PT_LOG(&s->dev, "IO region %i registered (size=0x%08"PRIx64 - " base_addr=0x%08"PRIx64" type: %#x)\n", - i, r->size, r->base_addr, type); - } - - /* Register expansion ROM address */ - if (d->rom.base_addr && d->rom.size) { - uint32_t bar_data = 0; - - /* Re-set BAR reported by OS, otherwise ROM can't be read. */ - if (xen_host_pci_get_long(d, PCI_ROM_ADDRESS, &bar_data)) { - return 0; - } - if ((bar_data & PCI_ROM_ADDRESS_MASK) == 0) { - bar_data |= d->rom.base_addr & PCI_ROM_ADDRESS_MASK; - xen_host_pci_set_long(d, PCI_ROM_ADDRESS, bar_data); - } - - s->bases[PCI_ROM_SLOT].access.maddr = d->rom.base_addr; - - memory_region_init_io(&s->rom, OBJECT(s), &ops, &s->dev, - "xen-pci-pt-rom", d->rom.size); - pci_register_bar(&s->dev, PCI_ROM_SLOT, PCI_BASE_ADDRESS_MEM_PREFETCH, - &s->rom); - - XEN_PT_LOG(&s->dev, "Expansion ROM registered (size=0x%08"PRIx64 - " base_addr=0x%08"PRIx64")\n", - d->rom.size, d->rom.base_addr); - } - - xen_pt_register_vga_regions(d); - return 0; -} - -/* region mapping */ - -static int xen_pt_bar_from_region(XenPCIPassthroughState *s, MemoryRegion *mr) -{ - int i = 0; - - for (i = 0; i < PCI_NUM_REGIONS - 1; i++) { - if (mr == &s->bar[i]) { - return i; - } - } - if (mr == &s->rom) { - return PCI_ROM_SLOT; - } - return -1; -} - -/* - * This function checks if an io_region overlaps an io_region from another - * device. The io_region to check is provided with (addr, size and type) - * A callback can be provided and will be called for every region that is - * overlapped. - * The return value indicates if the region is overlappsed */ -struct CheckBarArgs { - XenPCIPassthroughState *s; - pcibus_t addr; - pcibus_t size; - uint8_t type; - bool rc; -}; -static void xen_pt_check_bar_overlap(PCIBus *bus, PCIDevice *d, void *opaque) -{ - struct CheckBarArgs *arg = opaque; - XenPCIPassthroughState *s = arg->s; - uint8_t type = arg->type; - int i; - - if (d->devfn == s->dev.devfn) { - return; - } - - /* xxx: This ignores bridges. */ - for (i = 0; i < PCI_NUM_REGIONS; i++) { - const PCIIORegion *r = &d->io_regions[i]; - - if (!r->size) { - continue; - } - if ((type & PCI_BASE_ADDRESS_SPACE_IO) - != (r->type & PCI_BASE_ADDRESS_SPACE_IO)) { - continue; - } - - if (ranges_overlap(arg->addr, arg->size, r->addr, r->size)) { - XEN_PT_WARN(&s->dev, - "Overlapped to device [%02x:%02x.%d] Region: %i" - " (addr: %#"FMT_PCIBUS", len: %#"FMT_PCIBUS")\n", - pci_bus_num(bus), PCI_SLOT(d->devfn), - PCI_FUNC(d->devfn), i, r->addr, r->size); - arg->rc = true; - } - } -} - -static void xen_pt_region_update(XenPCIPassthroughState *s, - MemoryRegionSection *sec, bool adding) -{ - PCIDevice *d = &s->dev; - MemoryRegion *mr = sec->mr; - int bar = -1; - int rc; - int op = adding ? DPCI_ADD_MAPPING : DPCI_REMOVE_MAPPING; - struct CheckBarArgs args = { - .s = s, - .addr = sec->offset_within_address_space, - .size = int128_get64(sec->size), - .rc = false, - }; - - bar = xen_pt_bar_from_region(s, mr); - if (bar == -1 && (!s->msix || &s->msix->mmio != mr)) { - return; - } - - if (s->msix && &s->msix->mmio == mr) { - if (adding) { - s->msix->mmio_base_addr = sec->offset_within_address_space; - rc = xen_pt_msix_update_remap(s, s->msix->bar_index); - } - return; - } - - args.type = d->io_regions[bar].type; - pci_for_each_device(d->bus, pci_bus_num(d->bus), - xen_pt_check_bar_overlap, &args); - if (args.rc) { - XEN_PT_WARN(d, "Region: %d (addr: %#"FMT_PCIBUS - ", len: %#"FMT_PCIBUS") is overlapped.\n", - bar, sec->offset_within_address_space, - int128_get64(sec->size)); - } - - if (d->io_regions[bar].type & PCI_BASE_ADDRESS_SPACE_IO) { - uint32_t guest_port = sec->offset_within_address_space; - uint32_t machine_port = s->bases[bar].access.pio_base; - uint32_t size = int128_get64(sec->size); - rc = xc_domain_ioport_mapping(xen_xc, xen_domid, - guest_port, machine_port, size, - op); - if (rc) { - XEN_PT_ERR(d, "%s ioport mapping failed! (err: %i)\n", - adding ? "create new" : "remove old", errno); - } - } else { - pcibus_t guest_addr = sec->offset_within_address_space; - pcibus_t machine_addr = s->bases[bar].access.maddr - + sec->offset_within_region; - pcibus_t size = int128_get64(sec->size); - rc = xc_domain_memory_mapping(xen_xc, xen_domid, - XEN_PFN(guest_addr + XC_PAGE_SIZE - 1), - XEN_PFN(machine_addr + XC_PAGE_SIZE - 1), - XEN_PFN(size + XC_PAGE_SIZE - 1), - op); - if (rc) { - XEN_PT_ERR(d, "%s mem mapping failed! (err: %i)\n", - adding ? "create new" : "remove old", errno); - } - } -} - -static void xen_pt_region_add(MemoryListener *l, MemoryRegionSection *sec) -{ - XenPCIPassthroughState *s = container_of(l, XenPCIPassthroughState, - memory_listener); - - memory_region_ref(sec->mr); - xen_pt_region_update(s, sec, true); -} - -static void xen_pt_region_del(MemoryListener *l, MemoryRegionSection *sec) -{ - XenPCIPassthroughState *s = container_of(l, XenPCIPassthroughState, - memory_listener); - - xen_pt_region_update(s, sec, false); - memory_region_unref(sec->mr); -} - -static void xen_pt_io_region_add(MemoryListener *l, MemoryRegionSection *sec) -{ - XenPCIPassthroughState *s = container_of(l, XenPCIPassthroughState, - io_listener); - - memory_region_ref(sec->mr); - xen_pt_region_update(s, sec, true); -} - -static void xen_pt_io_region_del(MemoryListener *l, MemoryRegionSection *sec) -{ - XenPCIPassthroughState *s = container_of(l, XenPCIPassthroughState, - io_listener); - - xen_pt_region_update(s, sec, false); - memory_region_unref(sec->mr); -} - -static const MemoryListener xen_pt_memory_listener = { - .region_add = xen_pt_region_add, - .region_del = xen_pt_region_del, - .priority = 10, -}; - -static const MemoryListener xen_pt_io_listener = { - .region_add = xen_pt_io_region_add, - .region_del = xen_pt_io_region_del, - .priority = 10, -}; - -static void -xen_igd_passthrough_isa_bridge_create(XenPCIPassthroughState *s, - XenHostPCIDevice *dev) -{ - uint16_t gpu_dev_id; - PCIDevice *d = &s->dev; - - gpu_dev_id = dev->device_id; - igd_passthrough_isa_bridge_create(d->bus, gpu_dev_id); -} - -/* destroy. */ -static void xen_pt_destroy(PCIDevice *d) { - - XenPCIPassthroughState *s = XEN_PT_DEVICE(d); - XenHostPCIDevice *host_dev = &s->real_device; - uint8_t machine_irq = s->machine_irq; - uint8_t intx; - int rc; - - if (machine_irq && !xen_host_pci_device_closed(&s->real_device)) { - intx = xen_pt_pci_intx(s); - rc = xc_domain_unbind_pt_irq(xen_xc, xen_domid, machine_irq, - PT_IRQ_TYPE_PCI, - pci_bus_num(d->bus), - PCI_SLOT(s->dev.devfn), - intx, - 0 /* isa_irq */); - if (rc < 0) { - XEN_PT_ERR(d, "unbinding of interrupt INT%c failed." - " (machine irq: %i, err: %d)" - " But bravely continuing on..\n", - 'a' + intx, machine_irq, errno); - } - } - - /* N.B. xen_pt_config_delete takes care of freeing them. */ - if (s->msi) { - xen_pt_msi_disable(s); - } - if (s->msix) { - xen_pt_msix_disable(s); - } - - if (machine_irq) { - xen_pt_mapped_machine_irq[machine_irq]--; - - if (xen_pt_mapped_machine_irq[machine_irq] == 0) { - rc = xc_physdev_unmap_pirq(xen_xc, xen_domid, machine_irq); - - if (rc < 0) { - XEN_PT_ERR(d, "unmapping of interrupt %i failed. (err: %d)" - " But bravely continuing on..\n", - machine_irq, errno); - } - } - s->machine_irq = 0; - } - - /* delete all emulated config registers */ - xen_pt_config_delete(s); - - xen_pt_unregister_vga_regions(host_dev); - - if (s->listener_set) { - memory_listener_unregister(&s->memory_listener); - memory_listener_unregister(&s->io_listener); - s->listener_set = false; - } - if (!xen_host_pci_device_closed(&s->real_device)) { - xen_host_pci_device_put(&s->real_device); - } -} -/* init */ - -static void xen_pt_realize(PCIDevice *d, Error **errp) -{ - XenPCIPassthroughState *s = XEN_PT_DEVICE(d); - int i, rc = 0; - uint8_t machine_irq = 0, scratch; - uint16_t cmd = 0; - int pirq = XEN_PT_UNASSIGNED_PIRQ; - Error *err = NULL; - - /* register real device */ - XEN_PT_LOG(d, "Assigning real physical device %02x:%02x.%d" - " to devfn %#x\n", - s->hostaddr.bus, s->hostaddr.slot, s->hostaddr.function, - s->dev.devfn); - - xen_host_pci_device_get(&s->real_device, - s->hostaddr.domain, s->hostaddr.bus, - s->hostaddr.slot, s->hostaddr.function, - &err); - if (err) { - error_append_hint(&err, "Failed to \"open\" the real pci device"); - error_propagate(errp, err); - return; - } - - s->is_virtfn = s->real_device.is_virtfn; - if (s->is_virtfn) { - XEN_PT_LOG(d, "%04x:%02x:%02x.%d is a SR-IOV Virtual Function\n", - s->real_device.domain, s->real_device.bus, - s->real_device.dev, s->real_device.func); - } - - /* Initialize virtualized PCI configuration (Extended 256 Bytes) */ - memset(d->config, 0, PCI_CONFIG_SPACE_SIZE); - - s->memory_listener = xen_pt_memory_listener; - s->io_listener = xen_pt_io_listener; - - /* Setup VGA bios for passthrough GFX */ - if ((s->real_device.domain == 0) && (s->real_device.bus == 0) && - (s->real_device.dev == 2) && (s->real_device.func == 0)) { - if (!is_igd_vga_passthrough(&s->real_device)) { - error_setg(errp, "Need to enable igd-passthru if you're trying" - " to passthrough IGD GFX"); - xen_host_pci_device_put(&s->real_device); - return; - } - - xen_pt_setup_vga(s, &s->real_device, &err); - if (err) { - error_append_hint(&err, "Setup VGA BIOS of passthrough" - " GFX failed"); - error_propagate(errp, err); - xen_host_pci_device_put(&s->real_device); - return; - } - - /* Register ISA bridge for passthrough GFX. */ - xen_igd_passthrough_isa_bridge_create(s, &s->real_device); - } - - /* Handle real device's MMIO/PIO BARs */ - xen_pt_register_regions(s, &cmd); - - /* reinitialize each config register to be emulated */ - xen_pt_config_init(s, &err); - if (err) { - error_append_hint(&err, "PCI Config space initialisation failed"); - error_report_err(err); - rc = -1; - goto err_out; - } - - /* Bind interrupt */ - rc = xen_host_pci_get_byte(&s->real_device, PCI_INTERRUPT_PIN, &scratch); - if (rc) { - error_setg_errno(errp, errno, "Failed to read PCI_INTERRUPT_PIN"); - goto err_out; - } - if (!scratch) { - error_setg(errp, "no pin interrupt"); - goto out; - } - - machine_irq = s->real_device.irq; - rc = xc_physdev_map_pirq(xen_xc, xen_domid, machine_irq, &pirq); - if (rc < 0) { - error_setg_errno(errp, errno, "Mapping machine irq %u to" - " pirq %i failed", machine_irq, pirq); - - /* Disable PCI intx assertion (turn on bit10 of devctl) */ - cmd |= PCI_COMMAND_INTX_DISABLE; - machine_irq = 0; - s->machine_irq = 0; - } else { - machine_irq = pirq; - s->machine_irq = pirq; - xen_pt_mapped_machine_irq[machine_irq]++; - } - - /* bind machine_irq to device */ - if (machine_irq != 0) { - uint8_t e_intx = xen_pt_pci_intx(s); - - rc = xc_domain_bind_pt_pci_irq(xen_xc, xen_domid, machine_irq, - pci_bus_num(d->bus), - PCI_SLOT(d->devfn), - e_intx); - if (rc < 0) { - error_setg_errno(errp, errno, "Binding of interrupt %u failed", - e_intx); - - /* Disable PCI intx assertion (turn on bit10 of devctl) */ - cmd |= PCI_COMMAND_INTX_DISABLE; - xen_pt_mapped_machine_irq[machine_irq]--; - - if (xen_pt_mapped_machine_irq[machine_irq] == 0) { - if (xc_physdev_unmap_pirq(xen_xc, xen_domid, machine_irq)) { - error_setg_errno(errp, errno, "Unmapping of machine" - " interrupt %u failed", machine_irq); - } - } - s->machine_irq = 0; - } - } - -out: - if (cmd) { - uint16_t val; - - rc = xen_host_pci_get_word(&s->real_device, PCI_COMMAND, &val); - if (rc) { - error_setg_errno(errp, errno, "Failed to read PCI_COMMAND"); - goto err_out; - } else { - val |= cmd; - rc = xen_host_pci_set_word(&s->real_device, PCI_COMMAND, val); - if (rc) { - error_setg_errno(errp, errno, "Failed to write PCI_COMMAND" - " val = 0x%x", val); - goto err_out; - } - } - } - - memory_listener_register(&s->memory_listener, &s->dev.bus_master_as); - memory_listener_register(&s->io_listener, &address_space_io); - s->listener_set = true; - XEN_PT_LOG(d, - "Real physical device %02x:%02x.%d registered successfully\n", - s->hostaddr.bus, s->hostaddr.slot, s->hostaddr.function); - - return; - -err_out: - for (i = 0; i < PCI_ROM_SLOT; i++) { - object_unparent(OBJECT(&s->bar[i])); - } - object_unparent(OBJECT(&s->rom)); - - xen_pt_destroy(d); - assert(rc); -} - -static void xen_pt_unregister_device(PCIDevice *d) -{ - xen_pt_destroy(d); -} - -static Property xen_pci_passthrough_properties[] = { - DEFINE_PROP_PCI_HOST_DEVADDR("hostaddr", XenPCIPassthroughState, hostaddr), - DEFINE_PROP_BOOL("permissive", XenPCIPassthroughState, permissive, false), - DEFINE_PROP_END_OF_LIST(), -}; - -static void xen_pci_passthrough_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); - - k->realize = xen_pt_realize; - k->exit = xen_pt_unregister_device; - k->config_read = xen_pt_pci_read_config; - k->config_write = xen_pt_pci_write_config; - set_bit(DEVICE_CATEGORY_MISC, dc->categories); - dc->desc = "Assign an host PCI device with Xen"; - dc->props = xen_pci_passthrough_properties; -}; - -static void xen_pci_passthrough_finalize(Object *obj) -{ - XenPCIPassthroughState *s = XEN_PT_DEVICE(obj); - - xen_pt_msix_delete(s); -} - -static const TypeInfo xen_pci_passthrough_info = { - .name = TYPE_XEN_PT_DEVICE, - .parent = TYPE_PCI_DEVICE, - .instance_size = sizeof(XenPCIPassthroughState), - .instance_finalize = xen_pci_passthrough_finalize, - .class_init = xen_pci_passthrough_class_init, -}; - -static void xen_pci_passthrough_register_types(void) -{ - type_register_static(&xen_pci_passthrough_info); -} - -type_init(xen_pci_passthrough_register_types) |