diff options
| -rw-r--r-- | hw/i386/intel_iommu.c | 91 | ||||
| -rw-r--r-- | include/hw/i386/intel_iommu.h | 7 |
2 files changed, 63 insertions, 35 deletions
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index b90de6c664..055a1e865d 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -1485,11 +1485,11 @@ static bool vtd_switch_address_space(VTDAddressSpace *as) /* Turn off first then on the other */ if (use_iommu) { - memory_region_set_enabled(&as->sys_alias, false); + memory_region_set_enabled(&as->nodmar, false); memory_region_set_enabled(MEMORY_REGION(&as->iommu), true); } else { memory_region_set_enabled(MEMORY_REGION(&as->iommu), false); - memory_region_set_enabled(&as->sys_alias, true); + memory_region_set_enabled(&as->nodmar, true); } if (take_bql) { @@ -3286,7 +3286,8 @@ VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, int devfn) vtd_dev_as = vtd_bus->dev_as[devfn]; if (!vtd_dev_as) { - snprintf(name, sizeof(name), "intel_iommu_devfn_%d", devfn); + snprintf(name, sizeof(name), "vtd-%02x.%x", PCI_SLOT(devfn), + PCI_FUNC(devfn)); vtd_bus->dev_as[devfn] = vtd_dev_as = g_malloc0(sizeof(VTDAddressSpace)); vtd_dev_as->bus = bus; @@ -3295,44 +3296,53 @@ VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, int devfn) vtd_dev_as->context_cache_entry.context_cache_gen = 0; vtd_dev_as->iova_tree = iova_tree_new(); + memory_region_init(&vtd_dev_as->root, OBJECT(s), name, UINT64_MAX); + address_space_init(&vtd_dev_as->as, &vtd_dev_as->root, "vtd-root"); + /* - * Memory region relationships looks like (Address range shows - * only lower 32 bits to make it short in length...): - * - * |-----------------+-------------------+----------| - * | Name | Address range | Priority | - * |-----------------+-------------------+----------+ - * | vtd_root | 00000000-ffffffff | 0 | - * | intel_iommu | 00000000-ffffffff | 1 | - * | vtd_sys_alias | 00000000-ffffffff | 1 | - * | intel_iommu_ir | fee00000-feefffff | 64 | - * |-----------------+-------------------+----------| + * Build the DMAR-disabled container with aliases to the + * shared MRs. Note that aliasing to a shared memory region + * could help the memory API to detect same FlatViews so we + * can have devices to share the same FlatView when DMAR is + * disabled (either by not providing "intel_iommu=on" or with + * "iommu=pt"). It will greatly reduce the total number of + * FlatViews of the system hence VM runs faster. + */ + memory_region_init_alias(&vtd_dev_as->nodmar, OBJECT(s), + "vtd-nodmar", &s->mr_nodmar, 0, + memory_region_size(&s->mr_nodmar)); + + /* + * Build the per-device DMAR-enabled container. * - * We enable/disable DMAR by switching enablement for - * vtd_sys_alias and intel_iommu regions. IR region is always - * enabled. + * TODO: currently we have per-device IOMMU memory region only + * because we have per-device IOMMU notifiers for devices. If + * one day we can abstract the IOMMU notifiers out of the + * memory regions then we can also share the same memory + * region here just like what we've done above with the nodmar + * region. */ + strcat(name, "-dmar"); memory_region_init_iommu(&vtd_dev_as->iommu, sizeof(vtd_dev_as->iommu), TYPE_INTEL_IOMMU_MEMORY_REGION, OBJECT(s), - "intel_iommu_dmar", - UINT64_MAX); - memory_region_init_alias(&vtd_dev_as->sys_alias, OBJECT(s), - "vtd_sys_alias", get_system_memory(), - 0, memory_region_size(get_system_memory())); - memory_region_init_io(&vtd_dev_as->iommu_ir, OBJECT(s), - &vtd_mem_ir_ops, s, "intel_iommu_ir", - VTD_INTERRUPT_ADDR_SIZE); - memory_region_init(&vtd_dev_as->root, OBJECT(s), - "vtd_root", UINT64_MAX); - memory_region_add_subregion_overlap(&vtd_dev_as->root, + name, UINT64_MAX); + memory_region_init_alias(&vtd_dev_as->iommu_ir, OBJECT(s), "vtd-ir", + &s->mr_ir, 0, memory_region_size(&s->mr_ir)); + memory_region_add_subregion_overlap(MEMORY_REGION(&vtd_dev_as->iommu), VTD_INTERRUPT_ADDR_FIRST, - &vtd_dev_as->iommu_ir, 64); - address_space_init(&vtd_dev_as->as, &vtd_dev_as->root, name); - memory_region_add_subregion_overlap(&vtd_dev_as->root, 0, - &vtd_dev_as->sys_alias, 1); + &vtd_dev_as->iommu_ir, 1); + + /* + * Hook both the containers under the root container, we + * switch between DMAR & noDMAR by enable/disable + * corresponding sub-containers + */ memory_region_add_subregion_overlap(&vtd_dev_as->root, 0, MEMORY_REGION(&vtd_dev_as->iommu), - 1); + 0); + memory_region_add_subregion_overlap(&vtd_dev_as->root, 0, + &vtd_dev_as->nodmar, 0); + vtd_switch_address_space(vtd_dev_as); } return vtd_dev_as; @@ -3676,6 +3686,21 @@ static void vtd_realize(DeviceState *dev, Error **errp) memset(s->vtd_as_by_bus_num, 0, sizeof(s->vtd_as_by_bus_num)); memory_region_init_io(&s->csrmem, OBJECT(s), &vtd_mem_ops, s, "intel_iommu", DMAR_REG_SIZE); + + /* Create the shared memory regions by all devices */ + memory_region_init(&s->mr_nodmar, OBJECT(s), "vtd-nodmar", + UINT64_MAX); + memory_region_init_io(&s->mr_ir, OBJECT(s), &vtd_mem_ir_ops, + s, "vtd-ir", VTD_INTERRUPT_ADDR_SIZE); + memory_region_init_alias(&s->mr_sys_alias, OBJECT(s), + "vtd-sys-alias", get_system_memory(), 0, + memory_region_size(get_system_memory())); + memory_region_add_subregion_overlap(&s->mr_nodmar, 0, + &s->mr_sys_alias, 0); + memory_region_add_subregion_overlap(&s->mr_nodmar, + VTD_INTERRUPT_ADDR_FIRST, + &s->mr_ir, 1); + sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->csrmem); /* No corresponding destroy */ s->iotlb = g_hash_table_new_full(vtd_uint64_hash, vtd_uint64_equal, diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h index c11e3d5b34..536f62667b 100644 --- a/include/hw/i386/intel_iommu.h +++ b/include/hw/i386/intel_iommu.h @@ -105,8 +105,8 @@ struct VTDAddressSpace { uint8_t devfn; AddressSpace as; IOMMUMemoryRegion iommu; - MemoryRegion root; - MemoryRegion sys_alias; + MemoryRegion root; /* The root container of the device */ + MemoryRegion nodmar; /* The alias of shared nodmar MR */ MemoryRegion iommu_ir; /* Interrupt region: 0xfeeXXXXX */ IntelIOMMUState *iommu_state; VTDContextCacheEntry context_cache_entry; @@ -221,6 +221,9 @@ union VTD_IR_MSIAddress { struct IntelIOMMUState { X86IOMMUState x86_iommu; MemoryRegion csrmem; + MemoryRegion mr_nodmar; + MemoryRegion mr_ir; + MemoryRegion mr_sys_alias; uint8_t csr[DMAR_REG_SIZE]; /* register values */ uint8_t wmask[DMAR_REG_SIZE]; /* R/W bytes */ uint8_t w1cmask[DMAR_REG_SIZE]; /* RW1C(Write 1 to Clear) bytes */ |