1 /* 2 * QEMU emulation of an Intel IOMMU (VT-d) 3 * (DMA Remapping device) 4 * 5 * Copyright (C) 2013 Knut Omang, Oracle <knut.omang@oracle.com> 6 * Copyright (C) 2014 Le Tan, <tamlokveer@gmail.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 18 * You should have received a copy of the GNU General Public License along 19 * with this program; if not, see <http://www.gnu.org/licenses/>. 20 */ 21 22 #ifndef INTEL_IOMMU_H 23 #define INTEL_IOMMU_H 24 25 #include "hw/i386/x86-iommu.h" 26 #include "qemu/iova-tree.h" 27 #include "qom/object.h" 28 29 #define TYPE_INTEL_IOMMU_DEVICE "intel-iommu" 30 OBJECT_DECLARE_SIMPLE_TYPE(IntelIOMMUState, INTEL_IOMMU_DEVICE) 31 32 #define TYPE_INTEL_IOMMU_MEMORY_REGION "intel-iommu-iommu-memory-region" 33 34 /* DMAR Hardware Unit Definition address (IOMMU unit) */ 35 #define Q35_HOST_BRIDGE_IOMMU_ADDR 0xfed90000ULL 36 37 #define VTD_PCI_BUS_MAX 256 38 #define VTD_PCI_SLOT_MAX 32 39 #define VTD_PCI_FUNC_MAX 8 40 #define VTD_PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f) 41 #define VTD_PCI_FUNC(devfn) ((devfn) & 0x07) 42 #define VTD_SID_TO_BUS(sid) (((sid) >> 8) & 0xff) 43 #define VTD_SID_TO_DEVFN(sid) ((sid) & 0xff) 44 45 #define DMAR_REG_SIZE 0x230 46 #define VTD_HOST_AW_39BIT 39 47 #define VTD_HOST_AW_48BIT 48 48 #define VTD_HOST_ADDRESS_WIDTH VTD_HOST_AW_39BIT 49 #define VTD_HAW_MASK(aw) ((1ULL << (aw)) - 1) 50 51 #define DMAR_REPORT_F_INTR (1) 52 53 #define VTD_MSI_ADDR_HI_MASK (0xffffffff00000000ULL) 54 #define VTD_MSI_ADDR_HI_SHIFT (32) 55 #define VTD_MSI_ADDR_LO_MASK (0x00000000ffffffffULL) 56 57 typedef struct VTDContextEntry VTDContextEntry; 58 typedef struct VTDContextCacheEntry VTDContextCacheEntry; 59 typedef struct VTDAddressSpace VTDAddressSpace; 60 typedef struct VTDIOTLBEntry VTDIOTLBEntry; 61 typedef struct VTDBus VTDBus; 62 typedef union VTD_IR_TableEntry VTD_IR_TableEntry; 63 typedef union VTD_IR_MSIAddress VTD_IR_MSIAddress; 64 typedef struct VTDPASIDDirEntry VTDPASIDDirEntry; 65 typedef struct VTDPASIDEntry VTDPASIDEntry; 66 67 /* Context-Entry */ 68 struct VTDContextEntry { 69 union { 70 struct { 71 uint64_t lo; 72 uint64_t hi; 73 }; 74 struct { 75 uint64_t val[4]; 76 }; 77 }; 78 }; 79 80 struct VTDContextCacheEntry { 81 /* The cache entry is obsolete if 82 * context_cache_gen!=IntelIOMMUState.context_cache_gen 83 */ 84 uint32_t context_cache_gen; 85 struct VTDContextEntry context_entry; 86 }; 87 88 /* PASID Directory Entry */ 89 struct VTDPASIDDirEntry { 90 uint64_t val; 91 }; 92 93 /* PASID Table Entry */ 94 struct VTDPASIDEntry { 95 uint64_t val[8]; 96 }; 97 98 struct VTDAddressSpace { 99 PCIBus *bus; 100 uint8_t devfn; 101 AddressSpace as; 102 IOMMUMemoryRegion iommu; 103 MemoryRegion root; /* The root container of the device */ 104 MemoryRegion nodmar; /* The alias of shared nodmar MR */ 105 MemoryRegion iommu_ir; /* Interrupt region: 0xfeeXXXXX */ 106 IntelIOMMUState *iommu_state; 107 VTDContextCacheEntry context_cache_entry; 108 QLIST_ENTRY(VTDAddressSpace) next; 109 /* Superset of notifier flags that this address space has */ 110 IOMMUNotifierFlag notifier_flags; 111 IOVATree *iova_tree; /* Traces mapped IOVA ranges */ 112 }; 113 114 struct VTDBus { 115 PCIBus* bus; /* A reference to the bus to provide translation for */ 116 /* A table of VTDAddressSpace objects indexed by devfn */ 117 VTDAddressSpace *dev_as[]; 118 }; 119 120 struct VTDIOTLBEntry { 121 uint64_t gfn; 122 uint16_t domain_id; 123 uint64_t slpte; 124 uint64_t mask; 125 uint8_t access_flags; 126 }; 127 128 /* VT-d Source-ID Qualifier types */ 129 enum { 130 VTD_SQ_FULL = 0x00, /* Full SID verification */ 131 VTD_SQ_IGN_3 = 0x01, /* Ignore bit 3 */ 132 VTD_SQ_IGN_2_3 = 0x02, /* Ignore bits 2 & 3 */ 133 VTD_SQ_IGN_1_3 = 0x03, /* Ignore bits 1-3 */ 134 VTD_SQ_MAX, 135 }; 136 137 /* VT-d Source Validation Types */ 138 enum { 139 VTD_SVT_NONE = 0x00, /* No validation */ 140 VTD_SVT_ALL = 0x01, /* Do full validation */ 141 VTD_SVT_BUS = 0x02, /* Validate bus range */ 142 VTD_SVT_MAX, 143 }; 144 145 /* Interrupt Remapping Table Entry Definition */ 146 union VTD_IR_TableEntry { 147 struct { 148 #ifdef HOST_WORDS_BIGENDIAN 149 uint32_t __reserved_1:8; /* Reserved 1 */ 150 uint32_t vector:8; /* Interrupt Vector */ 151 uint32_t irte_mode:1; /* IRTE Mode */ 152 uint32_t __reserved_0:3; /* Reserved 0 */ 153 uint32_t __avail:4; /* Available spaces for software */ 154 uint32_t delivery_mode:3; /* Delivery Mode */ 155 uint32_t trigger_mode:1; /* Trigger Mode */ 156 uint32_t redir_hint:1; /* Redirection Hint */ 157 uint32_t dest_mode:1; /* Destination Mode */ 158 uint32_t fault_disable:1; /* Fault Processing Disable */ 159 uint32_t present:1; /* Whether entry present/available */ 160 #else 161 uint32_t present:1; /* Whether entry present/available */ 162 uint32_t fault_disable:1; /* Fault Processing Disable */ 163 uint32_t dest_mode:1; /* Destination Mode */ 164 uint32_t redir_hint:1; /* Redirection Hint */ 165 uint32_t trigger_mode:1; /* Trigger Mode */ 166 uint32_t delivery_mode:3; /* Delivery Mode */ 167 uint32_t __avail:4; /* Available spaces for software */ 168 uint32_t __reserved_0:3; /* Reserved 0 */ 169 uint32_t irte_mode:1; /* IRTE Mode */ 170 uint32_t vector:8; /* Interrupt Vector */ 171 uint32_t __reserved_1:8; /* Reserved 1 */ 172 #endif 173 uint32_t dest_id; /* Destination ID */ 174 uint16_t source_id; /* Source-ID */ 175 #ifdef HOST_WORDS_BIGENDIAN 176 uint64_t __reserved_2:44; /* Reserved 2 */ 177 uint64_t sid_vtype:2; /* Source-ID Validation Type */ 178 uint64_t sid_q:2; /* Source-ID Qualifier */ 179 #else 180 uint64_t sid_q:2; /* Source-ID Qualifier */ 181 uint64_t sid_vtype:2; /* Source-ID Validation Type */ 182 uint64_t __reserved_2:44; /* Reserved 2 */ 183 #endif 184 } QEMU_PACKED irte; 185 uint64_t data[2]; 186 }; 187 188 #define VTD_IR_INT_FORMAT_COMPAT (0) /* Compatible Interrupt */ 189 #define VTD_IR_INT_FORMAT_REMAP (1) /* Remappable Interrupt */ 190 191 /* Programming format for MSI/MSI-X addresses */ 192 union VTD_IR_MSIAddress { 193 struct { 194 #ifdef HOST_WORDS_BIGENDIAN 195 uint32_t __head:12; /* Should always be: 0x0fee */ 196 uint32_t index_l:15; /* Interrupt index bit 14-0 */ 197 uint32_t int_mode:1; /* Interrupt format */ 198 uint32_t sub_valid:1; /* SHV: Sub-Handle Valid bit */ 199 uint32_t index_h:1; /* Interrupt index bit 15 */ 200 uint32_t __not_care:2; 201 #else 202 uint32_t __not_care:2; 203 uint32_t index_h:1; /* Interrupt index bit 15 */ 204 uint32_t sub_valid:1; /* SHV: Sub-Handle Valid bit */ 205 uint32_t int_mode:1; /* Interrupt format */ 206 uint32_t index_l:15; /* Interrupt index bit 14-0 */ 207 uint32_t __head:12; /* Should always be: 0x0fee */ 208 #endif 209 } QEMU_PACKED addr; 210 uint32_t data; 211 }; 212 213 /* When IR is enabled, all MSI/MSI-X data bits should be zero */ 214 #define VTD_IR_MSI_DATA (0) 215 216 /* The iommu (DMAR) device state struct */ 217 struct IntelIOMMUState { 218 X86IOMMUState x86_iommu; 219 MemoryRegion csrmem; 220 MemoryRegion mr_nodmar; 221 MemoryRegion mr_ir; 222 MemoryRegion mr_sys_alias; 223 uint8_t csr[DMAR_REG_SIZE]; /* register values */ 224 uint8_t wmask[DMAR_REG_SIZE]; /* R/W bytes */ 225 uint8_t w1cmask[DMAR_REG_SIZE]; /* RW1C(Write 1 to Clear) bytes */ 226 uint8_t womask[DMAR_REG_SIZE]; /* WO (write only - read returns 0) */ 227 uint32_t version; 228 229 bool caching_mode; /* RO - is cap CM enabled? */ 230 bool scalable_mode; /* RO - is Scalable Mode supported? */ 231 bool snoop_control; /* RO - is SNP filed supported? */ 232 233 dma_addr_t root; /* Current root table pointer */ 234 bool root_scalable; /* Type of root table (scalable or not) */ 235 bool dmar_enabled; /* Set if DMA remapping is enabled */ 236 237 uint16_t iq_head; /* Current invalidation queue head */ 238 uint16_t iq_tail; /* Current invalidation queue tail */ 239 dma_addr_t iq; /* Current invalidation queue pointer */ 240 uint16_t iq_size; /* IQ Size in number of entries */ 241 bool iq_dw; /* IQ descriptor width 256bit or not */ 242 bool qi_enabled; /* Set if the QI is enabled */ 243 uint8_t iq_last_desc_type; /* The type of last completed descriptor */ 244 245 /* The index of the Fault Recording Register to be used next. 246 * Wraps around from N-1 to 0, where N is the number of FRCD_REG. 247 */ 248 uint16_t next_frcd_reg; 249 250 uint64_t cap; /* The value of capability reg */ 251 uint64_t ecap; /* The value of extended capability reg */ 252 253 uint32_t context_cache_gen; /* Should be in [1,MAX] */ 254 GHashTable *iotlb; /* IOTLB */ 255 256 GHashTable *vtd_as_by_busptr; /* VTDBus objects indexed by PCIBus* reference */ 257 VTDBus *vtd_as_by_bus_num[VTD_PCI_BUS_MAX]; /* VTDBus objects indexed by bus number */ 258 /* list of registered notifiers */ 259 QLIST_HEAD(, VTDAddressSpace) vtd_as_with_notifiers; 260 261 /* interrupt remapping */ 262 bool intr_enabled; /* Whether guest enabled IR */ 263 dma_addr_t intr_root; /* Interrupt remapping table pointer */ 264 uint32_t intr_size; /* Number of IR table entries */ 265 bool intr_eime; /* Extended interrupt mode enabled */ 266 OnOffAuto intr_eim; /* Toggle for EIM cabability */ 267 bool buggy_eim; /* Force buggy EIM unless eim=off */ 268 uint8_t aw_bits; /* Host/IOVA address width (in bits) */ 269 bool dma_drain; /* Whether DMA r/w draining enabled */ 270 271 /* 272 * Protects IOMMU states in general. Currently it protects the 273 * per-IOMMU IOTLB cache, and context entry cache in VTDAddressSpace. 274 */ 275 QemuMutex iommu_lock; 276 }; 277 278 /* Find the VTD Address space associated with the given bus pointer, 279 * create a new one if none exists 280 */ 281 VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, int devfn); 282 283 #endif 284