diff options
Diffstat (limited to 'hw/i386/intel_iommu.c')
| -rw-r--r-- | hw/i386/intel_iommu.c | 89 |
1 files changed, 73 insertions, 16 deletions
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 08055a8..3fe27fa 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -22,6 +22,7 @@ #include "hw/sysbus.h" #include "exec/address-spaces.h" #include "intel_iommu_internal.h" +#include "hw/pci/pci.h" /*#define DEBUG_INTEL_IOMMU*/ #ifdef DEBUG_INTEL_IOMMU @@ -166,19 +167,17 @@ static gboolean vtd_hash_remove_by_page(gpointer key, gpointer value, */ static void vtd_reset_context_cache(IntelIOMMUState *s) { - VTDAddressSpace **pvtd_as; VTDAddressSpace *vtd_as; - uint32_t bus_it; + VTDBus *vtd_bus; + GHashTableIter bus_it; uint32_t devfn_it; + g_hash_table_iter_init(&bus_it, s->vtd_as_by_busptr); + VTD_DPRINTF(CACHE, "global context_cache_gen=1"); - for (bus_it = 0; bus_it < VTD_PCI_BUS_MAX; ++bus_it) { - pvtd_as = s->address_spaces[bus_it]; - if (!pvtd_as) { - continue; - } + while (g_hash_table_iter_next (&bus_it, NULL, (void**)&vtd_bus)) { for (devfn_it = 0; devfn_it < VTD_PCI_DEVFN_MAX; ++devfn_it) { - vtd_as = pvtd_as[devfn_it]; + vtd_as = vtd_bus->dev_as[devfn_it]; if (!vtd_as) { continue; } @@ -754,12 +753,13 @@ static inline bool vtd_is_interrupt_addr(hwaddr addr) * @is_write: The access is a write operation * @entry: IOMMUTLBEntry that contain the addr to be translated and result */ -static void vtd_do_iommu_translate(VTDAddressSpace *vtd_as, uint8_t bus_num, +static void vtd_do_iommu_translate(VTDAddressSpace *vtd_as, PCIBus *bus, uint8_t devfn, hwaddr addr, bool is_write, IOMMUTLBEntry *entry) { IntelIOMMUState *s = vtd_as->iommu_state; VTDContextEntry ce; + uint8_t bus_num = pci_bus_num(bus); VTDContextCacheEntry *cc_entry = &vtd_as->context_cache_entry; uint64_t slpte; uint32_t level; @@ -874,6 +874,29 @@ static void vtd_context_global_invalidate(IntelIOMMUState *s) } } + +/* Find the VTD address space currently associated with a given bus number, + */ +static VTDBus *vtd_find_as_from_bus_num(IntelIOMMUState *s, uint8_t bus_num) +{ + VTDBus *vtd_bus = s->vtd_as_by_bus_num[bus_num]; + if (!vtd_bus) { + /* Iterate over the registered buses to find the one + * which currently hold this bus number, and update the bus_num lookup table: + */ + GHashTableIter iter; + + g_hash_table_iter_init(&iter, s->vtd_as_by_busptr); + while (g_hash_table_iter_next (&iter, NULL, (void**)&vtd_bus)) { + if (pci_bus_num(vtd_bus->bus) == bus_num) { + s->vtd_as_by_bus_num[bus_num] = vtd_bus; + return vtd_bus; + } + } + } + return vtd_bus; +} + /* Do a context-cache device-selective invalidation. * @func_mask: FM field after shifting */ @@ -882,7 +905,7 @@ static void vtd_context_device_invalidate(IntelIOMMUState *s, uint16_t func_mask) { uint16_t mask; - VTDAddressSpace **pvtd_as; + VTDBus *vtd_bus; VTDAddressSpace *vtd_as; uint16_t devfn; uint16_t devfn_it; @@ -903,11 +926,11 @@ static void vtd_context_device_invalidate(IntelIOMMUState *s, } VTD_DPRINTF(INV, "device-selective invalidation source 0x%"PRIx16 " mask %"PRIu16, source_id, mask); - pvtd_as = s->address_spaces[VTD_SID_TO_BUS(source_id)]; - if (pvtd_as) { + vtd_bus = vtd_find_as_from_bus_num(s, VTD_SID_TO_BUS(source_id)); + if (vtd_bus) { devfn = VTD_SID_TO_DEVFN(source_id); for (devfn_it = 0; devfn_it < VTD_PCI_DEVFN_MAX; ++devfn_it) { - vtd_as = pvtd_as[devfn_it]; + vtd_as = vtd_bus->dev_as[devfn_it]; if (vtd_as && ((devfn_it & mask) == (devfn & mask))) { VTD_DPRINTF(INV, "invalidate context-cahce of devfn 0x%"PRIx16, devfn_it); @@ -1805,11 +1828,11 @@ static IOMMUTLBEntry vtd_iommu_translate(MemoryRegion *iommu, hwaddr addr, return ret; } - vtd_do_iommu_translate(vtd_as, vtd_as->bus_num, vtd_as->devfn, addr, + vtd_do_iommu_translate(vtd_as, vtd_as->bus, vtd_as->devfn, addr, is_write, &ret); VTD_DPRINTF(MMU, "bus %"PRIu8 " slot %"PRIu8 " func %"PRIu8 " devfn %"PRIu8 - " gpa 0x%"PRIx64 " hpa 0x%"PRIx64, vtd_as->bus_num, + " gpa 0x%"PRIx64 " hpa 0x%"PRIx64, pci_bus_num(vtd_as->bus), VTD_PCI_SLOT(vtd_as->devfn), VTD_PCI_FUNC(vtd_as->devfn), vtd_as->devfn, addr, ret.translated_addr); return ret; @@ -1839,6 +1862,38 @@ static Property vtd_properties[] = { DEFINE_PROP_END_OF_LIST(), }; + +VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, int devfn) +{ + uintptr_t key = (uintptr_t)bus; + VTDBus *vtd_bus = g_hash_table_lookup(s->vtd_as_by_busptr, &key); + VTDAddressSpace *vtd_dev_as; + + if (!vtd_bus) { + /* No corresponding free() */ + vtd_bus = g_malloc0(sizeof(VTDBus) + sizeof(VTDAddressSpace *) * VTD_PCI_DEVFN_MAX); + vtd_bus->bus = bus; + key = (uintptr_t)bus; + g_hash_table_insert(s->vtd_as_by_busptr, &key, vtd_bus); + } + + vtd_dev_as = vtd_bus->dev_as[devfn]; + + if (!vtd_dev_as) { + vtd_bus->dev_as[devfn] = vtd_dev_as = g_malloc0(sizeof(VTDAddressSpace)); + + vtd_dev_as->bus = bus; + vtd_dev_as->devfn = (uint8_t)devfn; + vtd_dev_as->iommu_state = s; + vtd_dev_as->context_cache_entry.context_cache_gen = 0; + memory_region_init_iommu(&vtd_dev_as->iommu, OBJECT(s), + &s->iommu_ops, "intel_iommu", UINT64_MAX); + address_space_init(&vtd_dev_as->as, + &vtd_dev_as->iommu, "intel_iommu"); + } + return vtd_dev_as; +} + /* Do the initialization. It will also be called when reset, so pay * attention when adding new initialization stuff. */ @@ -1931,13 +1986,15 @@ static void vtd_realize(DeviceState *dev, Error **errp) IntelIOMMUState *s = INTEL_IOMMU_DEVICE(dev); VTD_DPRINTF(GENERAL, ""); - memset(s->address_spaces, 0, sizeof(s->address_spaces)); + 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); 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, g_free, g_free); + s->vtd_as_by_busptr = g_hash_table_new_full(vtd_uint64_hash, vtd_uint64_equal, + g_free, g_free); vtd_init(s); } |
