include/hw/i386/intel_iommu.h

   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 #include "hw/qdev.h"
  25 #include "sysemu/dma.h"
  26 #include "hw/i386/x86-iommu.h"
  27 #include "hw/i386/ioapic.h"
  28 #include "hw/pci/msi.h"
  29 #include "hw/sysbus.h"
  30
  31 #define TYPE_INTEL_IOMMU_DEVICE "intel-iommu"
  32 #define INTEL_IOMMU_DEVICE(obj) \
  33      OBJECT_CHECK(IntelIOMMUState, (obj), TYPE_INTEL_IOMMU_DEVICE)
  34
  35 /* DMAR Hardware Unit Definition address (IOMMU unit) */
  36 #define Q35_HOST_BRIDGE_IOMMU_ADDR  0xfed90000ULL
  37
  38 #define VTD_PCI_BUS_MAX             256
  39 #define VTD_PCI_SLOT_MAX            32
  40 #define VTD_PCI_FUNC_MAX            8
  41 #define VTD_PCI_SLOT(devfn)         (((devfn) >> 3) & 0x1f)
  42 #define VTD_PCI_FUNC(devfn)         ((devfn) & 0x07)
  43 #define VTD_SID_TO_BUS(sid)         (((sid) >> 8) & 0xff)
  44 #define VTD_SID_TO_DEVFN(sid)       ((sid) & 0xff)
  45
  46 #define DMAR_REG_SIZE               0x230
  47 #define VTD_HOST_ADDRESS_WIDTH      39
  48 #define VTD_HAW_MASK                ((1ULL << VTD_HOST_ADDRESS_WIDTH) - 1)
  49
  50 #define DMAR_REPORT_F_INTR          (1)
  51
  52 #define  VTD_MSI_ADDR_HI_MASK        (0xffffffff00000000ULL)
  53 #define  VTD_MSI_ADDR_HI_SHIFT       (32)
  54 #define  VTD_MSI_ADDR_LO_MASK        (0x00000000ffffffffULL)
  55
  56 typedef struct VTDContextEntry VTDContextEntry;
  57 typedef struct VTDContextCacheEntry VTDContextCacheEntry;
  58 typedef struct IntelIOMMUState IntelIOMMUState;
  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 VTDIrq VTDIrq;
  65 typedef struct VTD_MSIMessage VTD_MSIMessage;
  66
  67 /* Context-Entry */
  68 struct VTDContextEntry {
  69     uint64_t lo;
  70     uint64_t hi;
  71 };
  72
  73 struct VTDContextCacheEntry {
  74     /* The cache entry is obsolete if
  75      * context_cache_gen!=IntelIOMMUState.context_cache_gen
  76      */
  77     uint32_t context_cache_gen;
  78     struct VTDContextEntry context_entry;
  79 };
  80
  81 struct VTDAddressSpace {
  82     PCIBus *bus;
  83     uint8_t devfn;
  84     AddressSpace as;
  85     MemoryRegion iommu;
  86     MemoryRegion iommu_ir;      /* Interrupt region: 0xfeeXXXXX */
  87     IntelIOMMUState *iommu_state;
  88     VTDContextCacheEntry context_cache_entry;
  89 };
  90
  91 struct VTDBus {
  92     PCIBus* bus;                /* A reference to the bus to provide translation for */
  93     VTDAddressSpace *dev_as[0]; /* A table of VTDAddressSpace objects indexed by devfn */
  94 };
  95
  96 struct VTDIOTLBEntry {
  97     uint64_t gfn;
  98     uint16_t domain_id;
  99     uint64_t slpte;
 100     uint64_t mask;
 101     bool read_flags;
 102     bool write_flags;
 103 };
 104
 105 /* VT-d Source-ID Qualifier types */
 106 enum {
 107     VTD_SQ_FULL = 0x00,     /* Full SID verification */
 108     VTD_SQ_IGN_3 = 0x01,    /* Ignore bit 3 */
 109     VTD_SQ_IGN_2_3 = 0x02,  /* Ignore bits 2 & 3 */
 110     VTD_SQ_IGN_1_3 = 0x03,  /* Ignore bits 1-3 */
 111     VTD_SQ_MAX,
 112 };
 113
 114 /* VT-d Source Validation Types */
 115 enum {
 116     VTD_SVT_NONE = 0x00,    /* No validation */
 117     VTD_SVT_ALL = 0x01,     /* Do full validation */
 118     VTD_SVT_BUS = 0x02,     /* Validate bus range */
 119     VTD_SVT_MAX,
 120 };
 121
 122 /* Interrupt Remapping Table Entry Definition */
 123 union VTD_IR_TableEntry {
 124     struct {
 125 #ifdef HOST_WORDS_BIGENDIAN
 126         uint32_t __reserved_1:8;     /* Reserved 1 */
 127         uint32_t vector:8;           /* Interrupt Vector */
 128         uint32_t irte_mode:1;        /* IRTE Mode */
 129         uint32_t __reserved_0:3;     /* Reserved 0 */
 130         uint32_t __avail:4;          /* Available spaces for software */
 131         uint32_t delivery_mode:3;    /* Delivery Mode */
 132         uint32_t trigger_mode:1;     /* Trigger Mode */
 133         uint32_t redir_hint:1;       /* Redirection Hint */
 134         uint32_t dest_mode:1;        /* Destination Mode */
 135         uint32_t fault_disable:1;    /* Fault Processing Disable */
 136         uint32_t present:1;          /* Whether entry present/available */
 137 #else
 138         uint32_t present:1;          /* Whether entry present/available */
 139         uint32_t fault_disable:1;    /* Fault Processing Disable */
 140         uint32_t dest_mode:1;        /* Destination Mode */
 141         uint32_t redir_hint:1;       /* Redirection Hint */
 142         uint32_t trigger_mode:1;     /* Trigger Mode */
 143         uint32_t delivery_mode:3;    /* Delivery Mode */
 144         uint32_t __avail:4;          /* Available spaces for software */
 145         uint32_t __reserved_0:3;     /* Reserved 0 */
 146         uint32_t irte_mode:1;        /* IRTE Mode */
 147         uint32_t vector:8;           /* Interrupt Vector */
 148         uint32_t __reserved_1:8;     /* Reserved 1 */
 149 #endif
 150         uint32_t dest_id;            /* Destination ID */
 151         uint16_t source_id;          /* Source-ID */
 152 #ifdef HOST_WORDS_BIGENDIAN
 153         uint64_t __reserved_2:44;    /* Reserved 2 */
 154         uint64_t sid_vtype:2;        /* Source-ID Validation Type */
 155         uint64_t sid_q:2;            /* Source-ID Qualifier */
 156 #else
 157         uint64_t sid_q:2;            /* Source-ID Qualifier */
 158         uint64_t sid_vtype:2;        /* Source-ID Validation Type */
 159         uint64_t __reserved_2:44;    /* Reserved 2 */
 160 #endif
 161     } QEMU_PACKED irte;
 162     uint64_t data[2];
 163 };
 164
 165 #define VTD_IR_INT_FORMAT_COMPAT     (0) /* Compatible Interrupt */
 166 #define VTD_IR_INT_FORMAT_REMAP      (1) /* Remappable Interrupt */
 167
 168 /* Programming format for MSI/MSI-X addresses */
 169 union VTD_IR_MSIAddress {
 170     struct {
 171 #ifdef HOST_WORDS_BIGENDIAN
 172         uint32_t __head:12;          /* Should always be: 0x0fee */
 173         uint32_t index_l:15;         /* Interrupt index bit 14-0 */
 174         uint32_t int_mode:1;         /* Interrupt format */
 175         uint32_t sub_valid:1;        /* SHV: Sub-Handle Valid bit */
 176         uint32_t index_h:1;          /* Interrupt index bit 15 */
 177         uint32_t __not_care:2;
 178 #else
 179         uint32_t __not_care:2;
 180         uint32_t index_h:1;          /* Interrupt index bit 15 */
 181         uint32_t sub_valid:1;        /* SHV: Sub-Handle Valid bit */
 182         uint32_t int_mode:1;         /* Interrupt format */
 183         uint32_t index_l:15;         /* Interrupt index bit 14-0 */
 184         uint32_t __head:12;          /* Should always be: 0x0fee */
 185 #endif
 186     } QEMU_PACKED addr;
 187     uint32_t data;
 188 };
 189
 190 /* Generic IRQ entry information */
 191 struct VTDIrq {
 192     /* Used by both IOAPIC/MSI interrupt remapping */
 193     uint8_t trigger_mode;
 194     uint8_t vector;
 195     uint8_t delivery_mode;
 196     uint32_t dest;
 197     uint8_t dest_mode;
 198
 199     /* only used by MSI interrupt remapping */
 200     uint8_t redir_hint;
 201     uint8_t msi_addr_last_bits;
 202 };
 203
 204 struct VTD_MSIMessage {
 205     union {
 206         struct {
 207 #ifdef HOST_WORDS_BIGENDIAN
 208             uint32_t __addr_head:12; /* 0xfee */
 209             uint32_t dest:8;
 210             uint32_t __reserved:8;
 211             uint32_t redir_hint:1;
 212             uint32_t dest_mode:1;
 213             uint32_t __not_used:2;
 214 #else
 215             uint32_t __not_used:2;
 216             uint32_t dest_mode:1;
 217             uint32_t redir_hint:1;
 218             uint32_t __reserved:8;
 219             uint32_t dest:8;
 220             uint32_t __addr_head:12; /* 0xfee */
 221 #endif
 222             uint32_t __addr_hi;
 223         } QEMU_PACKED;
 224         uint64_t msi_addr;
 225     };
 226     union {
 227         struct {
 228 #ifdef HOST_WORDS_BIGENDIAN
 229             uint16_t trigger_mode:1;
 230             uint16_t level:1;
 231             uint16_t __resved:3;
 232             uint16_t delivery_mode:3;
 233             uint16_t vector:8;
 234 #else
 235             uint16_t vector:8;
 236             uint16_t delivery_mode:3;
 237             uint16_t __resved:3;
 238             uint16_t level:1;
 239             uint16_t trigger_mode:1;
 240 #endif
 241             uint16_t __resved1;
 242         } QEMU_PACKED;
 243         uint32_t msi_data;
 244     };
 245 };
 246
 247 /* When IR is enabled, all MSI/MSI-X data bits should be zero */
 248 #define VTD_IR_MSI_DATA          (0)
 249
 250 /* The iommu (DMAR) device state struct */
 251 struct IntelIOMMUState {
 252     X86IOMMUState x86_iommu;
 253     MemoryRegion csrmem;
 254     uint8_t csr[DMAR_REG_SIZE];     /* register values */
 255     uint8_t wmask[DMAR_REG_SIZE];   /* R/W bytes */
 256     uint8_t w1cmask[DMAR_REG_SIZE]; /* RW1C(Write 1 to Clear) bytes */
 257     uint8_t womask[DMAR_REG_SIZE];  /* WO (write only - read returns 0) */
 258     uint32_t version;
 259
 260     bool caching_mode;          /* RO - is cap CM enabled? */
 261
 262     dma_addr_t root;                /* Current root table pointer */
 263     bool root_extended;             /* Type of root table (extended or not) */
 264     bool dmar_enabled;              /* Set if DMA remapping is enabled */
 265
 266     uint16_t iq_head;               /* Current invalidation queue head */
 267     uint16_t iq_tail;               /* Current invalidation queue tail */
 268     dma_addr_t iq;                  /* Current invalidation queue pointer */
 269     uint16_t iq_size;               /* IQ Size in number of entries */
 270     bool qi_enabled;                /* Set if the QI is enabled */
 271     uint8_t iq_last_desc_type;      /* The type of last completed descriptor */
 272
 273     /* The index of the Fault Recording Register to be used next.
 274      * Wraps around from N-1 to 0, where N is the number of FRCD_REG.
 275      */
 276     uint16_t next_frcd_reg;
 277
 278     uint64_t cap;                   /* The value of capability reg */
 279     uint64_t ecap;                  /* The value of extended capability reg */
 280
 281     uint32_t context_cache_gen;     /* Should be in [1,MAX] */
 282     GHashTable *iotlb;              /* IOTLB */
 283
 284     MemoryRegionIOMMUOps iommu_ops;
 285     GHashTable *vtd_as_by_busptr;   /* VTDBus objects indexed by PCIBus* reference */
 286     VTDBus *vtd_as_by_bus_num[VTD_PCI_BUS_MAX]; /* VTDBus objects indexed by bus number */
 287
 288     /* interrupt remapping */
 289     bool intr_enabled;              /* Whether guest enabled IR */
 290     dma_addr_t intr_root;           /* Interrupt remapping table pointer */
 291     uint32_t intr_size;             /* Number of IR table entries */
 292     bool intr_eime;                 /* Extended interrupt mode enabled */
 293     OnOffAuto intr_eim;             /* Toggle for EIM cabability */
 294     bool buggy_eim;                 /* Force buggy EIM unless eim=off */
 295 };
 296
 297 /* Find the VTD Address space associated with the given bus pointer,
 298  * create a new one if none exists
 299  */
 300 VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, int devfn);
 301
 302 #endif