LXR qemu/include/hw/i386/intel

   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#define TYPE_INTEL_IOMMU_MEMORY_REGION "intel-iommu-iommu-memory-region"
  36
  37/* DMAR Hardware Unit Definition address (IOMMU unit) */
  38#define Q35_HOST_BRIDGE_IOMMU_ADDR  0xfed90000ULL
  39
  40#define VTD_PCI_BUS_MAX             256
  41#define VTD_PCI_SLOT_MAX            32
  42#define VTD_PCI_FUNC_MAX            8
  43#define VTD_PCI_SLOT(devfn)         (((devfn) >> 3) & 0x1f)
  44#define VTD_PCI_FUNC(devfn)         ((devfn) & 0x07)
  45#define VTD_SID_TO_BUS(sid)         (((sid) >> 8) & 0xff)
  46#define VTD_SID_TO_DEVFN(sid)       ((sid) & 0xff)
  47
  48#define DMAR_REG_SIZE               0x230
  49#define VTD_HOST_ADDRESS_WIDTH      39
  50#define VTD_HAW_MASK                ((1ULL << VTD_HOST_ADDRESS_WIDTH) - 1)
  51
  52#define DMAR_REPORT_F_INTR          (1)
  53
  54#define  VTD_MSI_ADDR_HI_MASK        (0xffffffff00000000ULL)
  55#define  VTD_MSI_ADDR_HI_SHIFT       (32)
  56#define  VTD_MSI_ADDR_LO_MASK        (0x00000000ffffffffULL)
  57
  58typedef struct VTDContextEntry VTDContextEntry;
  59typedef struct VTDContextCacheEntry VTDContextCacheEntry;
  60typedef struct IntelIOMMUState IntelIOMMUState;
  61typedef struct VTDAddressSpace VTDAddressSpace;
  62typedef struct VTDIOTLBEntry VTDIOTLBEntry;
  63typedef struct VTDBus VTDBus;
  64typedef union VTD_IR_TableEntry VTD_IR_TableEntry;
  65typedef union VTD_IR_MSIAddress VTD_IR_MSIAddress;
  66typedef struct VTDIrq VTDIrq;
  67typedef struct VTD_MSIMessage VTD_MSIMessage;
  68typedef struct IntelIOMMUNotifierNode IntelIOMMUNotifierNode;
  69
  70/* Context-Entry */
  71struct VTDContextEntry {
  72    uint64_t lo;
  73    uint64_t hi;
  74};
  75
  76struct VTDContextCacheEntry {
  77    /* The cache entry is obsolete if
  78     * context_cache_gen!=IntelIOMMUState.context_cache_gen
  79     */
  80    uint32_t context_cache_gen;
  81    struct VTDContextEntry context_entry;
  82};
  83
  84struct VTDAddressSpace {
  85    PCIBus *bus;
  86    uint8_t devfn;
  87    AddressSpace as;
  88    IOMMUMemoryRegion iommu;
  89    MemoryRegion root;
  90    MemoryRegion sys_alias;
  91    MemoryRegion iommu_ir;      /* Interrupt region: 0xfeeXXXXX */
  92    IntelIOMMUState *iommu_state;
  93    VTDContextCacheEntry context_cache_entry;
  94};
  95
  96struct VTDBus {
  97    PCIBus* bus;                /* A reference to the bus to provide translation for */
  98    VTDAddressSpace *dev_as[0]; /* A table of VTDAddressSpace objects indexed by devfn */
  99};
 100
 101struct VTDIOTLBEntry {
 102    uint64_t gfn;
 103    uint16_t domain_id;
 104    uint64_t slpte;
 105    uint64_t mask;
 106    uint8_t access_flags;
 107};
 108
 109/* VT-d Source-ID Qualifier types */
 110enum {
 111    VTD_SQ_FULL = 0x00,     /* Full SID verification */
 112    VTD_SQ_IGN_3 = 0x01,    /* Ignore bit 3 */
 113    VTD_SQ_IGN_2_3 = 0x02,  /* Ignore bits 2 & 3 */
 114    VTD_SQ_IGN_1_3 = 0x03,  /* Ignore bits 1-3 */
 115    VTD_SQ_MAX,
 116};
 117
 118/* VT-d Source Validation Types */
 119enum {
 120    VTD_SVT_NONE = 0x00,    /* No validation */
 121    VTD_SVT_ALL = 0x01,     /* Do full validation */
 122    VTD_SVT_BUS = 0x02,     /* Validate bus range */
 123    VTD_SVT_MAX,
 124};
 125
 126/* Interrupt Remapping Table Entry Definition */
 127union VTD_IR_TableEntry {
 128    struct {
 129#ifdef HOST_WORDS_BIGENDIAN
 130        uint32_t __reserved_1:8;     /* Reserved 1 */
 131        uint32_t vector:8;           /* Interrupt Vector */
 132        uint32_t irte_mode:1;        /* IRTE Mode */
 133        uint32_t __reserved_0:3;     /* Reserved 0 */
 134        uint32_t __avail:4;          /* Available spaces for software */
 135        uint32_t delivery_mode:3;    /* Delivery Mode */
 136        uint32_t trigger_mode:1;     /* Trigger Mode */
 137        uint32_t redir_hint:1;       /* Redirection Hint */
 138        uint32_t dest_mode:1;        /* Destination Mode */
 139        uint32_t fault_disable:1;    /* Fault Processing Disable */
 140        uint32_t present:1;          /* Whether entry present/available */
 141#else
 142        uint32_t present:1;          /* Whether entry present/available */
 143        uint32_t fault_disable:1;    /* Fault Processing Disable */
 144        uint32_t dest_mode:1;        /* Destination Mode */
 145        uint32_t redir_hint:1;       /* Redirection Hint */
 146        uint32_t trigger_mode:1;     /* Trigger Mode */
 147        uint32_t delivery_mode:3;    /* Delivery Mode */
 148        uint32_t __avail:4;          /* Available spaces for software */
 149        uint32_t __reserved_0:3;     /* Reserved 0 */
 150        uint32_t irte_mode:1;        /* IRTE Mode */
 151        uint32_t vector:8;           /* Interrupt Vector */
 152        uint32_t __reserved_1:8;     /* Reserved 1 */
 153#endif
 154        uint32_t dest_id;            /* Destination ID */
 155        uint16_t source_id;          /* Source-ID */
 156#ifdef HOST_WORDS_BIGENDIAN
 157        uint64_t __reserved_2:44;    /* Reserved 2 */
 158        uint64_t sid_vtype:2;        /* Source-ID Validation Type */
 159        uint64_t sid_q:2;            /* Source-ID Qualifier */
 160#else
 161        uint64_t sid_q:2;            /* Source-ID Qualifier */
 162        uint64_t sid_vtype:2;        /* Source-ID Validation Type */
 163        uint64_t __reserved_2:44;    /* Reserved 2 */
 164#endif
 165    } QEMU_PACKED irte;
 166    uint64_t data[2];
 167};
 168
 169#define VTD_IR_INT_FORMAT_COMPAT     (0) /* Compatible Interrupt */
 170#define VTD_IR_INT_FORMAT_REMAP      (1) /* Remappable Interrupt */
 171
 172/* Programming format for MSI/MSI-X addresses */
 173union VTD_IR_MSIAddress {
 174    struct {
 175#ifdef HOST_WORDS_BIGENDIAN
 176        uint32_t __head:12;          /* Should always be: 0x0fee */
 177        uint32_t index_l:15;         /* Interrupt index bit 14-0 */
 178        uint32_t int_mode:1;         /* Interrupt format */
 179        uint32_t sub_valid:1;        /* SHV: Sub-Handle Valid bit */
 180        uint32_t index_h:1;          /* Interrupt index bit 15 */
 181        uint32_t __not_care:2;
 182#else
 183        uint32_t __not_care:2;
 184        uint32_t index_h:1;          /* Interrupt index bit 15 */
 185        uint32_t sub_valid:1;        /* SHV: Sub-Handle Valid bit */
 186        uint32_t int_mode:1;         /* Interrupt format */
 187        uint32_t index_l:15;         /* Interrupt index bit 14-0 */
 188        uint32_t __head:12;          /* Should always be: 0x0fee */
 189#endif
 190    } QEMU_PACKED addr;
 191    uint32_t data;
 192};
 193
 194/* Generic IRQ entry information */
 195struct VTDIrq {
 196    /* Used by both IOAPIC/MSI interrupt remapping */
 197    uint8_t trigger_mode;
 198    uint8_t vector;
 199    uint8_t delivery_mode;
 200    uint32_t dest;
 201    uint8_t dest_mode;
 202
 203    /* only used by MSI interrupt remapping */
 204    uint8_t redir_hint;
 205    uint8_t msi_addr_last_bits;
 206};
 207
 208struct VTD_MSIMessage {
 209    union {
 210        struct {
 211#ifdef HOST_WORDS_BIGENDIAN
 212            uint32_t __addr_head:12; /* 0xfee */
 213            uint32_t dest:8;
 214            uint32_t __reserved:8;
 215            uint32_t redir_hint:1;
 216            uint32_t dest_mode:1;
 217            uint32_t __not_used:2;
 218#else
 219            uint32_t __not_used:2;
 220            uint32_t dest_mode:1;
 221            uint32_t redir_hint:1;
 222            uint32_t __reserved:8;
 223            uint32_t dest:8;
 224            uint32_t __addr_head:12; /* 0xfee */
 225#endif
 226            uint32_t __addr_hi;
 227        } QEMU_PACKED;
 228        uint64_t msi_addr;
 229    };
 230    union {
 231        struct {
 232#ifdef HOST_WORDS_BIGENDIAN
 233            uint16_t trigger_mode:1;
 234            uint16_t level:1;
 235            uint16_t __resved:3;
 236            uint16_t delivery_mode:3;
 237            uint16_t vector:8;
 238#else
 239            uint16_t vector:8;
 240            uint16_t delivery_mode:3;
 241            uint16_t __resved:3;
 242            uint16_t level:1;
 243            uint16_t trigger_mode:1;
 244#endif
 245            uint16_t __resved1;
 246        } QEMU_PACKED;
 247        uint32_t msi_data;
 248    };
 249};
 250
 251/* When IR is enabled, all MSI/MSI-X data bits should be zero */
 252#define VTD_IR_MSI_DATA          (0)
 253
 254struct IntelIOMMUNotifierNode {
 255    VTDAddressSpace *vtd_as;
 256    QLIST_ENTRY(IntelIOMMUNotifierNode) next;
 257};
 258
 259/* The iommu (DMAR) device state struct */
 260struct IntelIOMMUState {
 261    X86IOMMUState x86_iommu;
 262    MemoryRegion csrmem;
 263    uint8_t csr[DMAR_REG_SIZE];     /* register values */
 264    uint8_t wmask[DMAR_REG_SIZE];   /* R/W bytes */
 265    uint8_t w1cmask[DMAR_REG_SIZE]; /* RW1C(Write 1 to Clear) bytes */
 266    uint8_t womask[DMAR_REG_SIZE];  /* WO (write only - read returns 0) */
 267    uint32_t version;
 268
 269    bool caching_mode;          /* RO - is cap CM enabled? */
 270
 271    dma_addr_t root;                /* Current root table pointer */
 272    bool root_extended;             /* Type of root table (extended or not) */
 273    bool dmar_enabled;              /* Set if DMA remapping is enabled */
 274
 275    uint16_t iq_head;               /* Current invalidation queue head */
 276    uint16_t iq_tail;               /* Current invalidation queue tail */
 277    dma_addr_t iq;                  /* Current invalidation queue pointer */
 278    uint16_t iq_size;               /* IQ Size in number of entries */
 279    bool qi_enabled;                /* Set if the QI is enabled */
 280    uint8_t iq_last_desc_type;      /* The type of last completed descriptor */
 281
 282    /* The index of the Fault Recording Register to be used next.
 283     * Wraps around from N-1 to 0, where N is the number of FRCD_REG.
 284     */
 285    uint16_t next_frcd_reg;
 286
 287    uint64_t cap;                   /* The value of capability reg */
 288    uint64_t ecap;                  /* The value of extended capability reg */
 289
 290    uint32_t context_cache_gen;     /* Should be in [1,MAX] */
 291    GHashTable *iotlb;              /* IOTLB */
 292
 293    GHashTable *vtd_as_by_busptr;   /* VTDBus objects indexed by PCIBus* reference */
 294    VTDBus *vtd_as_by_bus_num[VTD_PCI_BUS_MAX]; /* VTDBus objects indexed by bus number */
 295    /* list of registered notifiers */
 296    QLIST_HEAD(, IntelIOMMUNotifierNode) notifiers_list;
 297
 298    /* interrupt remapping */
 299    bool intr_enabled;              /* Whether guest enabled IR */
 300    dma_addr_t intr_root;           /* Interrupt remapping table pointer */
 301    uint32_t intr_size;             /* Number of IR table entries */
 302    bool intr_eime;                 /* Extended interrupt mode enabled */
 303    OnOffAuto intr_eim;             /* Toggle for EIM cabability */
 304    bool buggy_eim;                 /* Force buggy EIM unless eim=off */
 305};
 306
 307/* Find the VTD Address space associated with the given bus pointer,
 308 * create a new one if none exists
 309 */
 310VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, int devfn);
 311
 312#endif
 313