qemu/include/hw/i386/intel_iommu.h
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   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"
  30OBJECT_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
  57typedef struct VTDContextEntry VTDContextEntry;
  58typedef struct VTDContextCacheEntry VTDContextCacheEntry;
  59typedef struct VTDAddressSpace VTDAddressSpace;
  60typedef struct VTDIOTLBEntry VTDIOTLBEntry;
  61typedef union VTD_IR_TableEntry VTD_IR_TableEntry;
  62typedef union VTD_IR_MSIAddress VTD_IR_MSIAddress;
  63typedef struct VTDPASIDDirEntry VTDPASIDDirEntry;
  64typedef struct VTDPASIDEntry VTDPASIDEntry;
  65
  66/* Context-Entry */
  67struct VTDContextEntry {
  68    union {
  69        struct {
  70            uint64_t lo;
  71            uint64_t hi;
  72        };
  73        struct {
  74            uint64_t val[4];
  75        };
  76    };
  77};
  78
  79struct VTDContextCacheEntry {
  80    /* The cache entry is obsolete if
  81     * context_cache_gen!=IntelIOMMUState.context_cache_gen
  82     */
  83    uint32_t context_cache_gen;
  84    struct VTDContextEntry context_entry;
  85};
  86
  87/* PASID Directory Entry */
  88struct VTDPASIDDirEntry {
  89    uint64_t val;
  90};
  91
  92/* PASID Table Entry */
  93struct VTDPASIDEntry {
  94    uint64_t val[8];
  95};
  96
  97struct VTDAddressSpace {
  98    PCIBus *bus;
  99    uint8_t devfn;
 100    uint32_t pasid;
 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    MemoryRegion iommu_ir_fault; /* Interrupt region for catching fault */
 107    IntelIOMMUState *iommu_state;
 108    VTDContextCacheEntry context_cache_entry;
 109    QLIST_ENTRY(VTDAddressSpace) next;
 110    /* Superset of notifier flags that this address space has */
 111    IOMMUNotifierFlag notifier_flags;
 112    IOVATree *iova_tree;          /* Traces mapped IOVA ranges */
 113};
 114
 115struct VTDIOTLBEntry {
 116    uint64_t gfn;
 117    uint16_t domain_id;
 118    uint32_t pasid;
 119    uint64_t slpte;
 120    uint64_t mask;
 121    uint8_t access_flags;
 122};
 123
 124/* VT-d Source-ID Qualifier types */
 125enum {
 126    VTD_SQ_FULL = 0x00,     /* Full SID verification */
 127    VTD_SQ_IGN_3 = 0x01,    /* Ignore bit 3 */
 128    VTD_SQ_IGN_2_3 = 0x02,  /* Ignore bits 2 & 3 */
 129    VTD_SQ_IGN_1_3 = 0x03,  /* Ignore bits 1-3 */
 130    VTD_SQ_MAX,
 131};
 132
 133/* VT-d Source Validation Types */
 134enum {
 135    VTD_SVT_NONE = 0x00,    /* No validation */
 136    VTD_SVT_ALL = 0x01,     /* Do full validation */
 137    VTD_SVT_BUS = 0x02,     /* Validate bus range */
 138    VTD_SVT_MAX,
 139};
 140
 141/* Interrupt Remapping Table Entry Definition */
 142union VTD_IR_TableEntry {
 143    struct {
 144#if HOST_BIG_ENDIAN
 145        uint32_t __reserved_1:8;     /* Reserved 1 */
 146        uint32_t vector:8;           /* Interrupt Vector */
 147        uint32_t irte_mode:1;        /* IRTE Mode */
 148        uint32_t __reserved_0:3;     /* Reserved 0 */
 149        uint32_t __avail:4;          /* Available spaces for software */
 150        uint32_t delivery_mode:3;    /* Delivery Mode */
 151        uint32_t trigger_mode:1;     /* Trigger Mode */
 152        uint32_t redir_hint:1;       /* Redirection Hint */
 153        uint32_t dest_mode:1;        /* Destination Mode */
 154        uint32_t fault_disable:1;    /* Fault Processing Disable */
 155        uint32_t present:1;          /* Whether entry present/available */
 156#else
 157        uint32_t present:1;          /* Whether entry present/available */
 158        uint32_t fault_disable:1;    /* Fault Processing Disable */
 159        uint32_t dest_mode:1;        /* Destination Mode */
 160        uint32_t redir_hint:1;       /* Redirection Hint */
 161        uint32_t trigger_mode:1;     /* Trigger Mode */
 162        uint32_t delivery_mode:3;    /* Delivery Mode */
 163        uint32_t __avail:4;          /* Available spaces for software */
 164        uint32_t __reserved_0:3;     /* Reserved 0 */
 165        uint32_t irte_mode:1;        /* IRTE Mode */
 166        uint32_t vector:8;           /* Interrupt Vector */
 167        uint32_t __reserved_1:8;     /* Reserved 1 */
 168#endif
 169        uint32_t dest_id;            /* Destination ID */
 170        uint16_t source_id;          /* Source-ID */
 171#if HOST_BIG_ENDIAN
 172        uint64_t __reserved_2:44;    /* Reserved 2 */
 173        uint64_t sid_vtype:2;        /* Source-ID Validation Type */
 174        uint64_t sid_q:2;            /* Source-ID Qualifier */
 175#else
 176        uint64_t sid_q:2;            /* Source-ID Qualifier */
 177        uint64_t sid_vtype:2;        /* Source-ID Validation Type */
 178        uint64_t __reserved_2:44;    /* Reserved 2 */
 179#endif
 180    } QEMU_PACKED irte;
 181    uint64_t data[2];
 182};
 183
 184#define VTD_IR_INT_FORMAT_COMPAT     (0) /* Compatible Interrupt */
 185#define VTD_IR_INT_FORMAT_REMAP      (1) /* Remappable Interrupt */
 186
 187/* Programming format for MSI/MSI-X addresses */
 188union VTD_IR_MSIAddress {
 189    struct {
 190#if HOST_BIG_ENDIAN
 191        uint32_t __head:12;          /* Should always be: 0x0fee */
 192        uint32_t index_l:15;         /* Interrupt index bit 14-0 */
 193        uint32_t int_mode:1;         /* Interrupt format */
 194        uint32_t sub_valid:1;        /* SHV: Sub-Handle Valid bit */
 195        uint32_t index_h:1;          /* Interrupt index bit 15 */
 196        uint32_t __not_care:2;
 197#else
 198        uint32_t __not_care:2;
 199        uint32_t index_h:1;          /* Interrupt index bit 15 */
 200        uint32_t sub_valid:1;        /* SHV: Sub-Handle Valid bit */
 201        uint32_t int_mode:1;         /* Interrupt format */
 202        uint32_t index_l:15;         /* Interrupt index bit 14-0 */
 203        uint32_t __head:12;          /* Should always be: 0x0fee */
 204#endif
 205    } QEMU_PACKED addr;
 206    uint32_t data;
 207};
 208
 209/* When IR is enabled, all MSI/MSI-X data bits should be zero */
 210#define VTD_IR_MSI_DATA          (0)
 211
 212/* The iommu (DMAR) device state struct */
 213struct IntelIOMMUState {
 214    X86IOMMUState x86_iommu;
 215    MemoryRegion csrmem;
 216    MemoryRegion mr_nodmar;
 217    MemoryRegion mr_ir;
 218    MemoryRegion mr_sys_alias;
 219    uint8_t csr[DMAR_REG_SIZE];     /* register values */
 220    uint8_t wmask[DMAR_REG_SIZE];   /* R/W bytes */
 221    uint8_t w1cmask[DMAR_REG_SIZE]; /* RW1C(Write 1 to Clear) bytes */
 222    uint8_t womask[DMAR_REG_SIZE];  /* WO (write only - read returns 0) */
 223    uint32_t version;
 224
 225    bool caching_mode;              /* RO - is cap CM enabled? */
 226    bool scalable_mode;             /* RO - is Scalable Mode supported? */
 227    bool snoop_control;             /* RO - is SNP filed supported? */
 228
 229    dma_addr_t root;                /* Current root table pointer */
 230    bool root_scalable;             /* Type of root table (scalable or not) */
 231    bool dmar_enabled;              /* Set if DMA remapping is enabled */
 232
 233    uint16_t iq_head;               /* Current invalidation queue head */
 234    uint16_t iq_tail;               /* Current invalidation queue tail */
 235    dma_addr_t iq;                  /* Current invalidation queue pointer */
 236    uint16_t iq_size;               /* IQ Size in number of entries */
 237    bool iq_dw;                     /* IQ descriptor width 256bit or not */
 238    bool qi_enabled;                /* Set if the QI is enabled */
 239    uint8_t iq_last_desc_type;      /* The type of last completed descriptor */
 240
 241    /* The index of the Fault Recording Register to be used next.
 242     * Wraps around from N-1 to 0, where N is the number of FRCD_REG.
 243     */
 244    uint16_t next_frcd_reg;
 245
 246    uint64_t cap;                   /* The value of capability reg */
 247    uint64_t ecap;                  /* The value of extended capability reg */
 248
 249    uint32_t context_cache_gen;     /* Should be in [1,MAX] */
 250    GHashTable *iotlb;              /* IOTLB */
 251
 252    GHashTable *vtd_address_spaces;             /* VTD address spaces */
 253    VTDAddressSpace *vtd_as_cache[VTD_PCI_BUS_MAX]; /* VTD address space cache */
 254    /* list of registered notifiers */
 255    QLIST_HEAD(, VTDAddressSpace) vtd_as_with_notifiers;
 256
 257    /* interrupt remapping */
 258    bool intr_enabled;              /* Whether guest enabled IR */
 259    dma_addr_t intr_root;           /* Interrupt remapping table pointer */
 260    uint32_t intr_size;             /* Number of IR table entries */
 261    bool intr_eime;                 /* Extended interrupt mode enabled */
 262    OnOffAuto intr_eim;             /* Toggle for EIM cabability */
 263    bool buggy_eim;                 /* Force buggy EIM unless eim=off */
 264    uint8_t aw_bits;                /* Host/IOVA address width (in bits) */
 265    bool dma_drain;                 /* Whether DMA r/w draining enabled */
 266    bool dma_translation;           /* Whether DMA translation supported */
 267    bool pasid;                     /* Whether to support PASID */
 268
 269    /*
 270     * Protects IOMMU states in general.  Currently it protects the
 271     * per-IOMMU IOTLB cache, and context entry cache in VTDAddressSpace.
 272     */
 273    QemuMutex iommu_lock;
 274};
 275
 276/* Find the VTD Address space associated with the given bus pointer,
 277 * create a new one if none exists
 278 */
 279VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus,
 280                                 int devfn, unsigned int pasid);
 281
 282#endif
 283
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