diff options
Diffstat (limited to 'hw/i386/intel_iommu.c')
| -rw-r--r-- | hw/i386/intel_iommu.c | 76 |
1 files changed, 54 insertions, 22 deletions
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index c25b1fd242..347718f938 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -153,14 +153,27 @@ static gboolean vtd_hash_remove_by_domain(gpointer key, gpointer value, return entry->domain_id == domain_id; } +/* The shift of an addr for a certain level of paging structure */ +static inline uint32_t vtd_slpt_level_shift(uint32_t level) +{ + return VTD_PAGE_SHIFT_4K + (level - 1) * VTD_SL_LEVEL_BITS; +} + +static inline uint64_t vtd_slpt_level_page_mask(uint32_t level) +{ + return ~((1ULL << vtd_slpt_level_shift(level)) - 1); +} + static gboolean vtd_hash_remove_by_page(gpointer key, gpointer value, gpointer user_data) { VTDIOTLBEntry *entry = (VTDIOTLBEntry *)value; VTDIOTLBPageInvInfo *info = (VTDIOTLBPageInvInfo *)user_data; - uint64_t gfn = info->gfn & info->mask; + uint64_t gfn = (info->addr >> VTD_PAGE_SHIFT_4K) & info->mask; + uint64_t gfn_tlb = (info->addr & entry->mask) >> VTD_PAGE_SHIFT_4K; return (entry->domain_id == info->domain_id) && - ((entry->gfn & info->mask) == gfn); + (((entry->gfn & info->mask) == gfn) || + (entry->gfn == gfn_tlb)); } /* Reset all the gen of VTDAddressSpace to zero and set the gen of @@ -194,24 +207,46 @@ static void vtd_reset_iotlb(IntelIOMMUState *s) g_hash_table_remove_all(s->iotlb); } +static uint64_t vtd_get_iotlb_key(uint64_t gfn, uint8_t source_id, + uint32_t level) +{ + return gfn | ((uint64_t)(source_id) << VTD_IOTLB_SID_SHIFT) | + ((uint64_t)(level) << VTD_IOTLB_LVL_SHIFT); +} + +static uint64_t vtd_get_iotlb_gfn(hwaddr addr, uint32_t level) +{ + return (addr & vtd_slpt_level_page_mask(level)) >> VTD_PAGE_SHIFT_4K; +} + static VTDIOTLBEntry *vtd_lookup_iotlb(IntelIOMMUState *s, uint16_t source_id, hwaddr addr) { + VTDIOTLBEntry *entry; uint64_t key; + int level; + + for (level = VTD_SL_PT_LEVEL; level < VTD_SL_PML4_LEVEL; level++) { + key = vtd_get_iotlb_key(vtd_get_iotlb_gfn(addr, level), + source_id, level); + entry = g_hash_table_lookup(s->iotlb, &key); + if (entry) { + goto out; + } + } - key = (addr >> VTD_PAGE_SHIFT_4K) | - ((uint64_t)(source_id) << VTD_IOTLB_SID_SHIFT); - return g_hash_table_lookup(s->iotlb, &key); - +out: + return entry; } static void vtd_update_iotlb(IntelIOMMUState *s, uint16_t source_id, uint16_t domain_id, hwaddr addr, uint64_t slpte, - bool read_flags, bool write_flags) + bool read_flags, bool write_flags, + uint32_t level) { VTDIOTLBEntry *entry = g_malloc(sizeof(*entry)); uint64_t *key = g_malloc(sizeof(*key)); - uint64_t gfn = addr >> VTD_PAGE_SHIFT_4K; + uint64_t gfn = vtd_get_iotlb_gfn(addr, level); VTD_DPRINTF(CACHE, "update iotlb sid 0x%"PRIx16 " gpa 0x%"PRIx64 " slpte 0x%"PRIx64 " did 0x%"PRIx16, source_id, addr, slpte, @@ -226,7 +261,8 @@ static void vtd_update_iotlb(IntelIOMMUState *s, uint16_t source_id, entry->slpte = slpte; entry->read_flags = read_flags; entry->write_flags = write_flags; - *key = gfn | ((uint64_t)(source_id) << VTD_IOTLB_SID_SHIFT); + entry->mask = vtd_slpt_level_page_mask(level); + *key = vtd_get_iotlb_key(gfn, source_id, level); g_hash_table_replace(s->iotlb, key, entry); } @@ -501,12 +537,6 @@ static inline dma_addr_t vtd_get_slpt_base_from_context(VTDContextEntry *ce) return ce->lo & VTD_CONTEXT_ENTRY_SLPTPTR; } -/* The shift of an addr for a certain level of paging structure */ -static inline uint32_t vtd_slpt_level_shift(uint32_t level) -{ - return VTD_PAGE_SHIFT_4K + (level - 1) * VTD_SL_LEVEL_BITS; -} - static inline uint64_t vtd_get_slpte_addr(uint64_t slpte) { return slpte & VTD_SL_PT_BASE_ADDR_MASK; @@ -762,7 +792,7 @@ static void vtd_do_iommu_translate(VTDAddressSpace *vtd_as, PCIBus *bus, VTDContextEntry ce; uint8_t bus_num = pci_bus_num(bus); VTDContextCacheEntry *cc_entry = &vtd_as->context_cache_entry; - uint64_t slpte; + uint64_t slpte, page_mask; uint32_t level; uint16_t source_id = vtd_make_source_id(bus_num, devfn); int ret_fr; @@ -802,6 +832,7 @@ static void vtd_do_iommu_translate(VTDAddressSpace *vtd_as, PCIBus *bus, slpte = iotlb_entry->slpte; reads = iotlb_entry->read_flags; writes = iotlb_entry->write_flags; + page_mask = iotlb_entry->mask; goto out; } /* Try to fetch context-entry from cache first */ @@ -848,12 +879,13 @@ static void vtd_do_iommu_translate(VTDAddressSpace *vtd_as, PCIBus *bus, return; } + page_mask = vtd_slpt_level_page_mask(level); vtd_update_iotlb(s, source_id, VTD_CONTEXT_ENTRY_DID(ce.hi), addr, slpte, - reads, writes); + reads, writes, level); out: - entry->iova = addr & VTD_PAGE_MASK_4K; - entry->translated_addr = vtd_get_slpte_addr(slpte) & VTD_PAGE_MASK_4K; - entry->addr_mask = ~VTD_PAGE_MASK_4K; + entry->iova = addr & page_mask; + entry->translated_addr = vtd_get_slpte_addr(slpte) & page_mask; + entry->addr_mask = ~page_mask; entry->perm = (writes ? 2 : 0) + (reads ? 1 : 0); } @@ -991,7 +1023,7 @@ static void vtd_iotlb_page_invalidate(IntelIOMMUState *s, uint16_t domain_id, assert(am <= VTD_MAMV); info.domain_id = domain_id; - info.gfn = addr >> VTD_PAGE_SHIFT_4K; + info.addr = addr; info.mask = ~((1 << am) - 1); g_hash_table_foreach_remove(s->iotlb, vtd_hash_remove_by_page, &info); } @@ -1917,7 +1949,7 @@ static void vtd_init(IntelIOMMUState *s) s->iq_last_desc_type = VTD_INV_DESC_NONE; s->next_frcd_reg = 0; s->cap = VTD_CAP_FRO | VTD_CAP_NFR | VTD_CAP_ND | VTD_CAP_MGAW | - VTD_CAP_SAGAW | VTD_CAP_MAMV | VTD_CAP_PSI; + VTD_CAP_SAGAW | VTD_CAP_MAMV | VTD_CAP_PSI | VTD_CAP_SLLPS; s->ecap = VTD_ECAP_QI | VTD_ECAP_IRO; vtd_reset_context_cache(s); |