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 root;
  87     MemoryRegion sys_alias;
  88     MemoryRegion iommu_ir;      /* Interrupt region: 0xfeeXXXXX */
  89     IntelIOMMUState *iommu_state;
  90     VTDContextCacheEntry context_cache_entry;
  91 };
  92
  93 struct VTDBus {
  94     PCIBus* bus;                /* A reference to the bus to provide translation for */
  95     VTDAddressSpace *dev_as[0]; /* A table of VTDAddressSpace objects indexed by devfn */
  96 };
  97
  98 struct VTDIOTLBEntry {
  99     uint64_t gfn;
 100     uint16_t domain_id;
 101     uint64_t slpte;
 102     uint64_t mask;
 103     bool read_flags;
 104     bool write_flags;
 105 };
 106
 107 /* VT-d Source-ID Qualifier types */
 108 enum {
 109     VTD_SQ_FULL = 0x00,     /* Full SID verification */
 110     VTD_SQ_IGN_3 = 0x01,    /* Ignore bit 3 */
 111     VTD_SQ_IGN_2_3 = 0x02,  /* Ignore bits 2 & 3 */
 112     VTD_SQ_IGN_1_3 = 0x03,  /* Ignore bits 1-3 */
 113     VTD_SQ_MAX,
 114 };
 115
 116 /* VT-d Source Validation Types */
 117 enum {
 118     VTD_SVT_NONE = 0x00,    /* No validation */
 119     VTD_SVT_ALL = 0x01,     /* Do full validation */
 120     VTD_SVT_BUS = 0x02,     /* Validate bus range */
 121     VTD_SVT_MAX,
 122 };
 123
 124 /* Interrupt Remapping Table Entry Definition */
 125 union VTD_IR_TableEntry {
 126     struct {
 127 #ifdef HOST_WORDS_BIGENDIAN
 128         uint32_t __reserved_1:8;     /* Reserved 1 */
 129         uint32_t vector:8;           /* Interrupt Vector */
 130         uint32_t irte_mode:1;        /* IRTE Mode */
 131         uint32_t __reserved_0:3;     /* Reserved 0 */
 132         uint32_t __avail:4;          /* Available spaces for software */
 133         uint32_t delivery_mode:3;    /* Delivery Mode */
 134         uint32_t trigger_mode:1;     /* Trigger Mode */
 135         uint32_t redir_hint:1;       /* Redirection Hint */
 136         uint32_t dest_mode:1;        /* Destination Mode */
 137         uint32_t fault_disable:1;    /* Fault Processing Disable */
 138         uint32_t present:1;          /* Whether entry present/available */
 139 #else
 140         uint32_t present:1;          /* Whether entry present/available */
 141         uint32_t fault_disable:1;    /* Fault Processing Disable */
 142         uint32_t dest_mode:1;        /* Destination Mode */
 143         uint32_t redir_hint:1;       /* Redirection Hint */
 144         uint32_t trigger_mode:1;     /* Trigger Mode */
 145         uint32_t delivery_mode:3;    /* Delivery Mode */
 146         uint32_t __avail:4;          /* Available spaces for software */
 147         uint32_t __reserved_0:3;     /* Reserved 0 */
 148         uint32_t irte_mode:1;        /* IRTE Mode */
 149         uint32_t vector:8;           /* Interrupt Vector */
 150         uint32_t __reserved_1:8;     /* Reserved 1 */
 151 #endif
 152         uint32_t dest_id;            /* Destination ID */
 153         uint16_t source_id;          /* Source-ID */
 154 #ifdef HOST_WORDS_BIGENDIAN
 155         uint64_t __reserved_2:44;    /* Reserved 2 */
 156         uint64_t sid_vtype:2;        /* Source-ID Validation Type */
 157         uint64_t sid_q:2;            /* Source-ID Qualifier */
 158 #else
 159         uint64_t sid_q:2;            /* Source-ID Qualifier */
 160         uint64_t sid_vtype:2;        /* Source-ID Validation Type */
 161         uint64_t __reserved_2:44;    /* Reserved 2 */
 162 #endif
 163     } QEMU_PACKED irte;
 164     uint64_t data[2];
 165 };
 166
 167 #define VTD_IR_INT_FORMAT_COMPAT     (0) /* Compatible Interrupt */
 168 #define VTD_IR_INT_FORMAT_REMAP      (1) /* Remappable Interrupt */
 169
 170 /* Programming format for MSI/MSI-X addresses */
 171 union VTD_IR_MSIAddress {
 172     struct {
 173 #ifdef HOST_WORDS_BIGENDIAN
 174         uint32_t __head:12;          /* Should always be: 0x0fee */
 175         uint32_t index_l:15;         /* Interrupt index bit 14-0 */
 176         uint32_t int_mode:1;         /* Interrupt format */
 177         uint32_t sub_valid:1;        /* SHV: Sub-Handle Valid bit */
 178         uint32_t index_h:1;          /* Interrupt index bit 15 */
 179         uint32_t __not_care:2;
 180 #else
 181         uint32_t __not_care:2;
 182         uint32_t index_h:1;          /* Interrupt index bit 15 */
 183         uint32_t sub_valid:1;        /* SHV: Sub-Handle Valid bit */
 184         uint32_t int_mode:1;         /* Interrupt format */
 185         uint32_t index_l:15;         /* Interrupt index bit 14-0 */
 186         uint32_t __head:12;          /* Should always be: 0x0fee */
 187 #endif
 188     } QEMU_PACKED addr;
 189     uint32_t data;
 190 };
 191
 192 /* Generic IRQ entry information */
 193 struct VTDIrq {
 194     /* Used by both IOAPIC/MSI interrupt remapping */
 195     uint8_t trigger_mode;
 196     uint8_t vector;
 197     uint8_t delivery_mode;
 198     uint32_t dest;
 199     uint8_t dest_mode;
 200
 201     /* only used by MSI interrupt remapping */
 202     uint8_t redir_hint;
 203     uint8_t msi_addr_last_bits;
 204 };
 205
 206 struct VTD_MSIMessage {
 207     union {
 208         struct {
 209 #ifdef HOST_WORDS_BIGENDIAN
 210             uint32_t __addr_head:12; /* 0xfee */
 211             uint32_t dest:8;
 212             uint32_t __reserved:8;
 213             uint32_t redir_hint:1;
 214             uint32_t dest_mode:1;
 215             uint32_t __not_used:2;
 216 #else
 217             uint32_t __not_used:2;
 218             uint32_t dest_mode:1;
 219             uint32_t redir_hint:1;
 220             uint32_t __reserved:8;
 221             uint32_t dest:8;
 222             uint32_t __addr_head:12; /* 0xfee */
 223 #endif
 224             uint32_t __addr_hi;
 225         } QEMU_PACKED;
 226         uint64_t msi_addr;
 227     };
 228     union {
 229         struct {
 230 #ifdef HOST_WORDS_BIGENDIAN
 231             uint16_t trigger_mode:1;
 232             uint16_t level:1;
 233             uint16_t __resved:3;
 234             uint16_t delivery_mode:3;
 235             uint16_t vector:8;
 236 #else
 237             uint16_t vector:8;
 238             uint16_t delivery_mode:3;
 239             uint16_t __resved:3;
 240             uint16_t level:1;
 241             uint16_t trigger_mode:1;
 242 #endif
 243             uint16_t __resved1;
 244         } QEMU_PACKED;
 245         uint32_t msi_data;
 246     };
 247 };
 248
 249 /* When IR is enabled, all MSI/MSI-X data bits should be zero */
 250 #define VTD_IR_MSI_DATA          (0)
 251
 252 /* The iommu (DMAR) device state struct */
 253 struct IntelIOMMUState {
 254     X86IOMMUState x86_iommu;
 255     MemoryRegion csrmem;
 256     uint8_t csr[DMAR_REG_SIZE];     /* register values */
 257     uint8_t wmask[DMAR_REG_SIZE];   /* R/W bytes */
 258     uint8_t w1cmask[DMAR_REG_SIZE]; /* RW1C(Write 1 to Clear) bytes */
 259     uint8_t womask[DMAR_REG_SIZE];  /* WO (write only - read returns 0) */
 260     uint32_t version;
 261
 262     bool caching_mode;          /* RO - is cap CM enabled? */
 263
 264     dma_addr_t root;                /* Current root table pointer */
 265     bool root_extended;             /* Type of root table (extended or not) */
 266     bool dmar_enabled;              /* Set if DMA remapping is enabled */
 267
 268     uint16_t iq_head;               /* Current invalidation queue head */
 269     uint16_t iq_tail;               /* Current invalidation queue tail */
 270     dma_addr_t iq;                  /* Current invalidation queue pointer */
 271     uint16_t iq_size;               /* IQ Size in number of entries */
 272     bool qi_enabled;                /* Set if the QI is enabled */
 273     uint8_t iq_last_desc_type;      /* The type of last completed descriptor */
 274
 275     /* The index of the Fault Recording Register to be used next.
 276      * Wraps around from N-1 to 0, where N is the number of FRCD_REG.
 277      */
 278     uint16_t next_frcd_reg;
 279
 280     uint64_t cap;                   /* The value of capability reg */
 281     uint64_t ecap;                  /* The value of extended capability reg */
 282
 283     uint32_t context_cache_gen;     /* Should be in [1,MAX] */
 284     GHashTable *iotlb;              /* IOTLB */
 285
 286     MemoryRegionIOMMUOps iommu_ops;
 287     GHashTable *vtd_as_by_busptr;   /* VTDBus objects indexed by PCIBus* reference */
 288     VTDBus *vtd_as_by_bus_num[VTD_PCI_BUS_MAX]; /* VTDBus objects indexed by bus number */
 289
 290     /* interrupt remapping */
 291     bool intr_enabled;              /* Whether guest enabled IR */
 292     dma_addr_t intr_root;           /* Interrupt remapping table pointer */
 293     uint32_t intr_size;             /* Number of IR table entries */
 294     bool intr_eime;                 /* Extended interrupt mode enabled */
 295     OnOffAuto intr_eim;             /* Toggle for EIM cabability */
 296     bool buggy_eim;                 /* Force buggy EIM unless eim=off */
 297 };
 298
 299 /* Find the VTD Address space associated with the given bus pointer,
 300  * create a new one if none exists
 301  */
 302 VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, int devfn);
 303
 304 #endif