| /* |
| * graphics passthrough |
| */ |
| #include "qemu/osdep.h" |
| #include "qapi/error.h" |
| #include "xen_pt.h" |
| #include "xen-host-pci-device.h" |
| #include "hw/xen/xen-legacy-backend.h" |
| |
| static unsigned long igd_guest_opregion; |
| static unsigned long igd_host_opregion; |
| |
| #define XEN_PCI_INTEL_OPREGION_MASK 0xfff |
| |
| typedef struct VGARegion { |
| int type; /* Memory or port I/O */ |
| uint64_t guest_base_addr; |
| uint64_t machine_base_addr; |
| uint64_t size; /* size of the region */ |
| int rc; |
| } VGARegion; |
| |
| #define IORESOURCE_IO 0x00000100 |
| #define IORESOURCE_MEM 0x00000200 |
| |
| static struct VGARegion vga_args[] = { |
| { |
| .type = IORESOURCE_IO, |
| .guest_base_addr = 0x3B0, |
| .machine_base_addr = 0x3B0, |
| .size = 0xC, |
| .rc = -1, |
| }, |
| { |
| .type = IORESOURCE_IO, |
| .guest_base_addr = 0x3C0, |
| .machine_base_addr = 0x3C0, |
| .size = 0x20, |
| .rc = -1, |
| }, |
| { |
| .type = IORESOURCE_MEM, |
| .guest_base_addr = 0xa0000 >> XC_PAGE_SHIFT, |
| .machine_base_addr = 0xa0000 >> XC_PAGE_SHIFT, |
| .size = 0x20, |
| .rc = -1, |
| }, |
| }; |
| |
| /* |
| * register VGA resources for the domain with assigned gfx |
| */ |
| int xen_pt_register_vga_regions(XenHostPCIDevice *dev) |
| { |
| int i = 0; |
| |
| if (!is_igd_vga_passthrough(dev)) { |
| return 0; |
| } |
| |
| for (i = 0 ; i < ARRAY_SIZE(vga_args); i++) { |
| if (vga_args[i].type == IORESOURCE_IO) { |
| vga_args[i].rc = xc_domain_ioport_mapping(xen_xc, xen_domid, |
| vga_args[i].guest_base_addr, |
| vga_args[i].machine_base_addr, |
| vga_args[i].size, DPCI_ADD_MAPPING); |
| } else { |
| vga_args[i].rc = xc_domain_memory_mapping(xen_xc, xen_domid, |
| vga_args[i].guest_base_addr, |
| vga_args[i].machine_base_addr, |
| vga_args[i].size, DPCI_ADD_MAPPING); |
| } |
| |
| if (vga_args[i].rc) { |
| XEN_PT_ERR(NULL, "VGA %s mapping failed! (rc: %i)\n", |
| vga_args[i].type == IORESOURCE_IO ? "ioport" : "memory", |
| vga_args[i].rc); |
| return vga_args[i].rc; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * unregister VGA resources for the domain with assigned gfx |
| */ |
| int xen_pt_unregister_vga_regions(XenHostPCIDevice *dev) |
| { |
| int i = 0; |
| int ret = 0; |
| |
| if (!is_igd_vga_passthrough(dev)) { |
| return 0; |
| } |
| |
| for (i = 0 ; i < ARRAY_SIZE(vga_args); i++) { |
| if (vga_args[i].type == IORESOURCE_IO) { |
| vga_args[i].rc = xc_domain_ioport_mapping(xen_xc, xen_domid, |
| vga_args[i].guest_base_addr, |
| vga_args[i].machine_base_addr, |
| vga_args[i].size, DPCI_REMOVE_MAPPING); |
| } else { |
| vga_args[i].rc = xc_domain_memory_mapping(xen_xc, xen_domid, |
| vga_args[i].guest_base_addr, |
| vga_args[i].machine_base_addr, |
| vga_args[i].size, DPCI_REMOVE_MAPPING); |
| } |
| |
| if (vga_args[i].rc) { |
| XEN_PT_ERR(NULL, "VGA %s unmapping failed! (rc: %i)\n", |
| vga_args[i].type == IORESOURCE_IO ? "ioport" : "memory", |
| vga_args[i].rc); |
| return vga_args[i].rc; |
| } |
| } |
| |
| if (igd_guest_opregion) { |
| ret = xc_domain_memory_mapping(xen_xc, xen_domid, |
| (unsigned long)(igd_guest_opregion >> XC_PAGE_SHIFT), |
| (unsigned long)(igd_host_opregion >> XC_PAGE_SHIFT), |
| 3, |
| DPCI_REMOVE_MAPPING); |
| if (ret) { |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void *get_vgabios(XenPCIPassthroughState *s, int *size, |
| XenHostPCIDevice *dev) |
| { |
| return pci_assign_dev_load_option_rom(&s->dev, size, |
| dev->domain, dev->bus, |
| dev->dev, dev->func); |
| } |
| |
| /* Refer to Seabios. */ |
| struct rom_header { |
| uint16_t signature; |
| uint8_t size; |
| uint8_t initVector[4]; |
| uint8_t reserved[17]; |
| uint16_t pcioffset; |
| uint16_t pnpoffset; |
| } __attribute__((packed)); |
| |
| struct pci_data { |
| uint32_t signature; |
| uint16_t vendor; |
| uint16_t device; |
| uint16_t vitaldata; |
| uint16_t dlen; |
| uint8_t drevision; |
| uint8_t class_lo; |
| uint16_t class_hi; |
| uint16_t ilen; |
| uint16_t irevision; |
| uint8_t type; |
| uint8_t indicator; |
| uint16_t reserved; |
| } __attribute__((packed)); |
| |
| void xen_pt_setup_vga(XenPCIPassthroughState *s, XenHostPCIDevice *dev, |
| Error **errp) |
| { |
| unsigned char *bios = NULL; |
| struct rom_header *rom; |
| int bios_size; |
| char *c = NULL; |
| char checksum = 0; |
| uint32_t len = 0; |
| struct pci_data *pd = NULL; |
| |
| if (!is_igd_vga_passthrough(dev)) { |
| error_setg(errp, "Need to enable igd-passthrough"); |
| return; |
| } |
| |
| bios = get_vgabios(s, &bios_size, dev); |
| if (!bios) { |
| error_setg(errp, "VGA: Can't get VBIOS"); |
| return; |
| } |
| |
| if (bios_size < sizeof(struct rom_header)) { |
| error_setg(errp, "VGA: VBIOS image corrupt (too small)"); |
| return; |
| } |
| |
| /* Currently we fixed this address as a primary. */ |
| rom = (struct rom_header *)bios; |
| |
| if (rom->pcioffset + sizeof(struct pci_data) > bios_size) { |
| error_setg(errp, "VGA: VBIOS image corrupt (bad pcioffset field)"); |
| return; |
| } |
| |
| pd = (void *)(bios + (unsigned char)rom->pcioffset); |
| |
| /* We may need to fixup Device Identification. */ |
| if (pd->device != s->real_device.device_id) { |
| pd->device = s->real_device.device_id; |
| |
| len = rom->size * 512; |
| if (len > bios_size) { |
| error_setg(errp, "VGA: VBIOS image corrupt (bad size field)"); |
| return; |
| } |
| |
| /* Then adjust the bios checksum */ |
| for (c = (char *)bios; c < ((char *)bios + len); c++) { |
| checksum += *c; |
| } |
| if (checksum) { |
| bios[len - 1] -= checksum; |
| XEN_PT_LOG(&s->dev, "vga bios checksum is adjusted %x!\n", |
| checksum); |
| } |
| } |
| |
| /* Currently we fixed this address as a primary for legacy BIOS. */ |
| cpu_physical_memory_write(0xc0000, bios, bios_size); |
| } |
| |
| uint32_t igd_read_opregion(XenPCIPassthroughState *s) |
| { |
| uint32_t val = 0; |
| |
| if (!igd_guest_opregion) { |
| return val; |
| } |
| |
| val = igd_guest_opregion; |
| |
| XEN_PT_LOG(&s->dev, "Read opregion val=%x\n", val); |
| return val; |
| } |
| |
| #define XEN_PCI_INTEL_OPREGION_PAGES 0x3 |
| #define XEN_PCI_INTEL_OPREGION_ENABLE_ACCESSED 0x1 |
| void igd_write_opregion(XenPCIPassthroughState *s, uint32_t val) |
| { |
| int ret; |
| |
| if (igd_guest_opregion) { |
| XEN_PT_LOG(&s->dev, "opregion register already been set, ignoring %x\n", |
| val); |
| return; |
| } |
| |
| /* We just work with LE. */ |
| xen_host_pci_get_block(&s->real_device, XEN_PCI_INTEL_OPREGION, |
| (uint8_t *)&igd_host_opregion, 4); |
| igd_guest_opregion = (unsigned long)(val & ~XEN_PCI_INTEL_OPREGION_MASK) |
| | (igd_host_opregion & XEN_PCI_INTEL_OPREGION_MASK); |
| |
| ret = xc_domain_iomem_permission(xen_xc, xen_domid, |
| (unsigned long)(igd_host_opregion >> XC_PAGE_SHIFT), |
| XEN_PCI_INTEL_OPREGION_PAGES, |
| XEN_PCI_INTEL_OPREGION_ENABLE_ACCESSED); |
| |
| if (ret) { |
| XEN_PT_ERR(&s->dev, "[%d]:Can't enable to access IGD host opregion:" |
| " 0x%lx.\n", ret, |
| (unsigned long)(igd_host_opregion >> XC_PAGE_SHIFT)), |
| igd_guest_opregion = 0; |
| return; |
| } |
| |
| ret = xc_domain_memory_mapping(xen_xc, xen_domid, |
| (unsigned long)(igd_guest_opregion >> XC_PAGE_SHIFT), |
| (unsigned long)(igd_host_opregion >> XC_PAGE_SHIFT), |
| XEN_PCI_INTEL_OPREGION_PAGES, |
| DPCI_ADD_MAPPING); |
| |
| if (ret) { |
| XEN_PT_ERR(&s->dev, "[%d]:Can't map IGD host opregion:0x%lx to" |
| " guest opregion:0x%lx.\n", ret, |
| (unsigned long)(igd_host_opregion >> XC_PAGE_SHIFT), |
| (unsigned long)(igd_guest_opregion >> XC_PAGE_SHIFT)); |
| igd_guest_opregion = 0; |
| return; |
| } |
| |
| XEN_PT_LOG(&s->dev, "Map OpRegion: 0x%lx -> 0x%lx\n", |
| (unsigned long)(igd_host_opregion >> XC_PAGE_SHIFT), |
| (unsigned long)(igd_guest_opregion >> XC_PAGE_SHIFT)); |
| } |
| |
| typedef struct { |
| uint16_t gpu_device_id; |
| uint16_t pch_device_id; |
| uint8_t pch_revision_id; |
| } IGDDeviceIDInfo; |
| |
| /* |
| * In real world different GPU should have different PCH. But actually |
| * the different PCH DIDs likely map to different PCH SKUs. We do the |
| * same thing for the GPU. For PCH, the different SKUs are going to be |
| * all the same silicon design and implementation, just different |
| * features turn on and off with fuses. The SW interfaces should be |
| * consistent across all SKUs in a given family (eg LPT). But just same |
| * features may not be supported. |
| * |
| * Most of these different PCH features probably don't matter to the |
| * Gfx driver, but obviously any difference in display port connections |
| * will so it should be fine with any PCH in case of passthrough. |
| * |
| * So currently use one PCH version, 0x8c4e, to cover all HSW(Haswell) |
| * scenarios, 0x9cc3 for BDW(Broadwell). |
| */ |
| static const IGDDeviceIDInfo igd_combo_id_infos[] = { |
| /* HSW Classic */ |
| {0x0402, 0x8c4e, 0x04}, /* HSWGT1D, HSWD_w7 */ |
| {0x0406, 0x8c4e, 0x04}, /* HSWGT1M, HSWM_w7 */ |
| {0x0412, 0x8c4e, 0x04}, /* HSWGT2D, HSWD_w7 */ |
| {0x0416, 0x8c4e, 0x04}, /* HSWGT2M, HSWM_w7 */ |
| {0x041E, 0x8c4e, 0x04}, /* HSWGT15D, HSWD_w7 */ |
| /* HSW ULT */ |
| {0x0A06, 0x8c4e, 0x04}, /* HSWGT1UT, HSWM_w7 */ |
| {0x0A16, 0x8c4e, 0x04}, /* HSWGT2UT, HSWM_w7 */ |
| {0x0A26, 0x8c4e, 0x06}, /* HSWGT3UT, HSWM_w7 */ |
| {0x0A2E, 0x8c4e, 0x04}, /* HSWGT3UT28W, HSWM_w7 */ |
| {0x0A1E, 0x8c4e, 0x04}, /* HSWGT2UX, HSWM_w7 */ |
| {0x0A0E, 0x8c4e, 0x04}, /* HSWGT1ULX, HSWM_w7 */ |
| /* HSW CRW */ |
| {0x0D26, 0x8c4e, 0x04}, /* HSWGT3CW, HSWM_w7 */ |
| {0x0D22, 0x8c4e, 0x04}, /* HSWGT3CWDT, HSWD_w7 */ |
| /* HSW Server */ |
| {0x041A, 0x8c4e, 0x04}, /* HSWSVGT2, HSWD_w7 */ |
| /* HSW SRVR */ |
| {0x040A, 0x8c4e, 0x04}, /* HSWSVGT1, HSWD_w7 */ |
| /* BSW */ |
| {0x1606, 0x9cc3, 0x03}, /* BDWULTGT1, BDWM_w7 */ |
| {0x1616, 0x9cc3, 0x03}, /* BDWULTGT2, BDWM_w7 */ |
| {0x1626, 0x9cc3, 0x03}, /* BDWULTGT3, BDWM_w7 */ |
| {0x160E, 0x9cc3, 0x03}, /* BDWULXGT1, BDWM_w7 */ |
| {0x161E, 0x9cc3, 0x03}, /* BDWULXGT2, BDWM_w7 */ |
| {0x1602, 0x9cc3, 0x03}, /* BDWHALOGT1, BDWM_w7 */ |
| {0x1612, 0x9cc3, 0x03}, /* BDWHALOGT2, BDWM_w7 */ |
| {0x1622, 0x9cc3, 0x03}, /* BDWHALOGT3, BDWM_w7 */ |
| {0x162B, 0x9cc3, 0x03}, /* BDWHALO28W, BDWM_w7 */ |
| {0x162A, 0x9cc3, 0x03}, /* BDWGT3WRKS, BDWM_w7 */ |
| {0x162D, 0x9cc3, 0x03}, /* BDWGT3SRVR, BDWM_w7 */ |
| }; |
| |
| static void isa_bridge_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| |
| dc->desc = "ISA bridge faked to support IGD PT"; |
| set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); |
| k->vendor_id = PCI_VENDOR_ID_INTEL; |
| k->class_id = PCI_CLASS_BRIDGE_ISA; |
| }; |
| |
| static const TypeInfo isa_bridge_info = { |
| .name = "igd-passthrough-isa-bridge", |
| .parent = TYPE_PCI_DEVICE, |
| .instance_size = sizeof(PCIDevice), |
| .class_init = isa_bridge_class_init, |
| .interfaces = (InterfaceInfo[]) { |
| { INTERFACE_CONVENTIONAL_PCI_DEVICE }, |
| { }, |
| }, |
| }; |
| |
| static void pt_graphics_register_types(void) |
| { |
| type_register_static(&isa_bridge_info); |
| } |
| type_init(pt_graphics_register_types) |
| |
| void xen_igd_passthrough_isa_bridge_create(XenPCIPassthroughState *s, |
| XenHostPCIDevice *dev) |
| { |
| PCIBus *bus = pci_get_bus(&s->dev); |
| struct PCIDevice *bridge_dev; |
| int i, num; |
| const uint16_t gpu_dev_id = dev->device_id; |
| uint16_t pch_dev_id = 0xffff; |
| uint8_t pch_rev_id = 0; |
| |
| num = ARRAY_SIZE(igd_combo_id_infos); |
| for (i = 0; i < num; i++) { |
| if (gpu_dev_id == igd_combo_id_infos[i].gpu_device_id) { |
| pch_dev_id = igd_combo_id_infos[i].pch_device_id; |
| pch_rev_id = igd_combo_id_infos[i].pch_revision_id; |
| } |
| } |
| |
| if (pch_dev_id == 0xffff) { |
| return; |
| } |
| |
| /* Currently IGD drivers always need to access PCH by 1f.0. */ |
| bridge_dev = pci_create_simple(bus, PCI_DEVFN(0x1f, 0), |
| "igd-passthrough-isa-bridge"); |
| |
| /* |
| * Note that vendor id is always PCI_VENDOR_ID_INTEL. |
| */ |
| if (!bridge_dev) { |
| fprintf(stderr, "set igd-passthrough-isa-bridge failed!\n"); |
| return; |
| } |
| pci_config_set_device_id(bridge_dev->config, pch_dev_id); |
| pci_config_set_revision(bridge_dev->config, pch_rev_id); |
| } |
