hw/i386/amd_iommu.h

   1 /*
   2  * QEMU emulation of an AMD IOMMU (AMD-Vi)
   3  *
   4  * Copyright (C) 2011 Eduard - Gabriel Munteanu
   5  * Copyright (C) 2015 David Kiarie, <davidkiarie4@gmail.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #ifndef AMD_IOMMU_H_
  22 #define AMD_IOMMU_H_
  23
  24 #include "hw/hw.h"
  25 #include "hw/pci/pci.h"
  26 #include "hw/pci/msi.h"
  27 #include "hw/sysbus.h"
  28 #include "sysemu/dma.h"
  29 #include "hw/i386/pc.h"
  30 #include "hw/pci/pci_bus.h"
  31 #include "hw/i386/x86-iommu.h"
  32
  33 /* Capability registers */
  34 #define AMDVI_CAPAB_BAR_LOW           0x04
  35 #define AMDVI_CAPAB_BAR_HIGH          0x08
  36 #define AMDVI_CAPAB_RANGE             0x0C
  37 #define AMDVI_CAPAB_MISC              0x10
  38
  39 #define AMDVI_CAPAB_SIZE              0x18
  40 #define AMDVI_CAPAB_REG_SIZE          0x04
  41
  42 /* Capability header data */
  43 #define AMDVI_CAPAB_ID_SEC            0xf
  44 #define AMDVI_CAPAB_FLAT_EXT          (1 << 28)
  45 #define AMDVI_CAPAB_EFR_SUP           (1 << 27)
  46 #define AMDVI_CAPAB_FLAG_NPCACHE      (1 << 26)
  47 #define AMDVI_CAPAB_FLAG_HTTUNNEL     (1 << 25)
  48 #define AMDVI_CAPAB_FLAG_IOTLBSUP     (1 << 24)
  49 #define AMDVI_CAPAB_INIT_TYPE         (3 << 16)
  50
  51 /* No. of used MMIO registers */
  52 #define AMDVI_MMIO_REGS_HIGH  8
  53 #define AMDVI_MMIO_REGS_LOW   7
  54
  55 /* MMIO registers */
  56 #define AMDVI_MMIO_DEVICE_TABLE       0x0000
  57 #define AMDVI_MMIO_COMMAND_BASE       0x0008
  58 #define AMDVI_MMIO_EVENT_BASE         0x0010
  59 #define AMDVI_MMIO_CONTROL            0x0018
  60 #define AMDVI_MMIO_EXCL_BASE          0x0020
  61 #define AMDVI_MMIO_EXCL_LIMIT         0x0028
  62 #define AMDVI_MMIO_EXT_FEATURES       0x0030
  63 #define AMDVI_MMIO_COMMAND_HEAD       0x2000
  64 #define AMDVI_MMIO_COMMAND_TAIL       0x2008
  65 #define AMDVI_MMIO_EVENT_HEAD         0x2010
  66 #define AMDVI_MMIO_EVENT_TAIL         0x2018
  67 #define AMDVI_MMIO_STATUS             0x2020
  68 #define AMDVI_MMIO_PPR_BASE           0x0038
  69 #define AMDVI_MMIO_PPR_HEAD           0x2030
  70 #define AMDVI_MMIO_PPR_TAIL           0x2038
  71
  72 #define AMDVI_MMIO_SIZE               0x4000
  73
  74 #define AMDVI_MMIO_DEVTAB_SIZE_MASK   ((1ULL << 12) - 1)
  75 #define AMDVI_MMIO_DEVTAB_BASE_MASK   (((1ULL << 52) - 1) & ~ \
  76                                        AMDVI_MMIO_DEVTAB_SIZE_MASK)
  77 #define AMDVI_MMIO_DEVTAB_ENTRY_SIZE  32
  78 #define AMDVI_MMIO_DEVTAB_SIZE_UNIT   4096
  79
  80 /* some of this are similar but just for readability */
  81 #define AMDVI_MMIO_CMDBUF_SIZE_BYTE       (AMDVI_MMIO_COMMAND_BASE + 7)
  82 #define AMDVI_MMIO_CMDBUF_SIZE_MASK       0x0f
  83 #define AMDVI_MMIO_CMDBUF_BASE_MASK       AMDVI_MMIO_DEVTAB_BASE_MASK
  84 #define AMDVI_MMIO_CMDBUF_HEAD_MASK       (((1ULL << 19) - 1) & ~0x0f)
  85 #define AMDVI_MMIO_CMDBUF_TAIL_MASK       AMDVI_MMIO_EVTLOG_HEAD_MASK
  86
  87 #define AMDVI_MMIO_EVTLOG_SIZE_BYTE       (AMDVI_MMIO_EVENT_BASE + 7)
  88 #define AMDVI_MMIO_EVTLOG_SIZE_MASK       AMDVI_MMIO_CMDBUF_SIZE_MASK
  89 #define AMDVI_MMIO_EVTLOG_BASE_MASK       AMDVI_MMIO_CMDBUF_BASE_MASK
  90 #define AMDVI_MMIO_EVTLOG_HEAD_MASK       (((1ULL << 19) - 1) & ~0x0f)
  91 #define AMDVI_MMIO_EVTLOG_TAIL_MASK       AMDVI_MMIO_EVTLOG_HEAD_MASK
  92
  93 #define AMDVI_MMIO_PPRLOG_SIZE_BYTE       (AMDVI_MMIO_EVENT_BASE + 7)
  94 #define AMDVI_MMIO_PPRLOG_HEAD_MASK       AMDVI_MMIO_EVTLOG_HEAD_MASK
  95 #define AMDVI_MMIO_PPRLOG_TAIL_MASK       AMDVI_MMIO_EVTLOG_HEAD_MASK
  96 #define AMDVI_MMIO_PPRLOG_BASE_MASK       AMDVI_MMIO_EVTLOG_BASE_MASK
  97 #define AMDVI_MMIO_PPRLOG_SIZE_MASK       AMDVI_MMIO_EVTLOG_SIZE_MASK
  98
  99 #define AMDVI_MMIO_EXCL_ENABLED_MASK      (1ULL << 0)
 100 #define AMDVI_MMIO_EXCL_ALLOW_MASK        (1ULL << 1)
 101 #define AMDVI_MMIO_EXCL_LIMIT_MASK        AMDVI_MMIO_DEVTAB_BASE_MASK
 102 #define AMDVI_MMIO_EXCL_LIMIT_LOW         0xfff
 103
 104 /* mmio control register flags */
 105 #define AMDVI_MMIO_CONTROL_AMDVIEN        (1ULL << 0)
 106 #define AMDVI_MMIO_CONTROL_HTTUNEN        (1ULL << 1)
 107 #define AMDVI_MMIO_CONTROL_EVENTLOGEN     (1ULL << 2)
 108 #define AMDVI_MMIO_CONTROL_EVENTINTEN     (1ULL << 3)
 109 #define AMDVI_MMIO_CONTROL_COMWAITINTEN   (1ULL << 4)
 110 #define AMDVI_MMIO_CONTROL_CMDBUFLEN      (1ULL << 12)
 111
 112 /* MMIO status register bits */
 113 #define AMDVI_MMIO_STATUS_CMDBUF_RUN  (1 << 4)
 114 #define AMDVI_MMIO_STATUS_EVT_RUN     (1 << 3)
 115 #define AMDVI_MMIO_STATUS_COMP_INT    (1 << 2)
 116 #define AMDVI_MMIO_STATUS_EVT_OVF     (1 << 0)
 117
 118 #define AMDVI_CMDBUF_ID_BYTE              0x07
 119 #define AMDVI_CMDBUF_ID_RSHIFT            4
 120
 121 #define AMDVI_CMD_COMPLETION_WAIT         0x01
 122 #define AMDVI_CMD_INVAL_DEVTAB_ENTRY      0x02
 123 #define AMDVI_CMD_INVAL_AMDVI_PAGES       0x03
 124 #define AMDVI_CMD_INVAL_IOTLB_PAGES       0x04
 125 #define AMDVI_CMD_INVAL_INTR_TABLE        0x05
 126 #define AMDVI_CMD_PREFETCH_AMDVI_PAGES    0x06
 127 #define AMDVI_CMD_COMPLETE_PPR_REQUEST    0x07
 128 #define AMDVI_CMD_INVAL_AMDVI_ALL         0x08
 129
 130 #define AMDVI_DEVTAB_ENTRY_SIZE           32
 131
 132 /* Device table entry bits 0:63 */
 133 #define AMDVI_DEV_VALID                   (1ULL << 0)
 134 #define AMDVI_DEV_TRANSLATION_VALID       (1ULL << 1)
 135 #define AMDVI_DEV_MODE_MASK               0x7
 136 #define AMDVI_DEV_MODE_RSHIFT             9
 137 #define AMDVI_DEV_PT_ROOT_MASK            0xffffffffff000
 138 #define AMDVI_DEV_PT_ROOT_RSHIFT          12
 139 #define AMDVI_DEV_PERM_SHIFT              61
 140 #define AMDVI_DEV_PERM_READ               (1ULL << 61)
 141 #define AMDVI_DEV_PERM_WRITE              (1ULL << 62)
 142
 143 /* Device table entry bits 64:127 */
 144 #define AMDVI_DEV_DOMID_ID_MASK          ((1ULL << 16) - 1)
 145
 146 /* Event codes and flags, as stored in the info field */
 147 #define AMDVI_EVENT_ILLEGAL_DEVTAB_ENTRY  (0x1U << 12)
 148 #define AMDVI_EVENT_IOPF                  (0x2U << 12)
 149 #define   AMDVI_EVENT_IOPF_I              (1U << 3)
 150 #define AMDVI_EVENT_DEV_TAB_HW_ERROR      (0x3U << 12)
 151 #define AMDVI_EVENT_PAGE_TAB_HW_ERROR     (0x4U << 12)
 152 #define AMDVI_EVENT_ILLEGAL_COMMAND_ERROR (0x5U << 12)
 153 #define AMDVI_EVENT_COMMAND_HW_ERROR      (0x6U << 12)
 154
 155 #define AMDVI_EVENT_LEN                  16
 156 #define AMDVI_PERM_READ             (1 << 0)
 157 #define AMDVI_PERM_WRITE            (1 << 1)
 158
 159 #define AMDVI_FEATURE_PREFETCH            (1ULL << 0) /* page prefetch       */
 160 #define AMDVI_FEATURE_PPR                 (1ULL << 1) /* PPR Support         */
 161 #define AMDVI_FEATURE_GT                  (1ULL << 4) /* Guest Translation   */
 162 #define AMDVI_FEATURE_IA                  (1ULL << 6) /* inval all support   */
 163 #define AMDVI_FEATURE_GA                  (1ULL << 7) /* guest VAPIC support */
 164 #define AMDVI_FEATURE_HE                  (1ULL << 8) /* hardware error regs */
 165 #define AMDVI_FEATURE_PC                  (1ULL << 9) /* Perf counters       */
 166
 167 /* reserved DTE bits */
 168 #define AMDVI_DTE_LOWER_QUAD_RESERVED  0x80300000000000fc
 169 #define AMDVI_DTE_MIDDLE_QUAD_RESERVED 0x0000000000000100
 170 #define AMDVI_DTE_UPPER_QUAD_RESERVED  0x08f0000000000000
 171
 172 /* AMDVI paging mode */
 173 #define AMDVI_GATS_MODE                 (6ULL <<  12)
 174 #define AMDVI_HATS_MODE                 (6ULL <<  10)
 175
 176 /* IOTLB */
 177 #define AMDVI_IOTLB_MAX_SIZE 1024
 178 #define AMDVI_DEVID_SHIFT    36
 179
 180 /* extended feature support */
 181 #define AMDVI_EXT_FEATURES (AMDVI_FEATURE_PREFETCH | AMDVI_FEATURE_PPR | \
 182         AMDVI_FEATURE_IA | AMDVI_FEATURE_GT | AMDVI_FEATURE_HE | \
 183         AMDVI_GATS_MODE | AMDVI_HATS_MODE)
 184
 185 /* capabilities header */
 186 #define AMDVI_CAPAB_FEATURES (AMDVI_CAPAB_FLAT_EXT | \
 187         AMDVI_CAPAB_FLAG_NPCACHE | AMDVI_CAPAB_FLAG_IOTLBSUP \
 188         | AMDVI_CAPAB_ID_SEC | AMDVI_CAPAB_INIT_TYPE | \
 189         AMDVI_CAPAB_FLAG_HTTUNNEL |  AMDVI_CAPAB_EFR_SUP)
 190
 191 /* AMDVI default address */
 192 #define AMDVI_BASE_ADDR 0xfed80000
 193
 194 /* page management constants */
 195 #define AMDVI_PAGE_SHIFT 12
 196 #define AMDVI_PAGE_SIZE  (1ULL << AMDVI_PAGE_SHIFT)
 197
 198 #define AMDVI_PAGE_SHIFT_4K 12
 199 #define AMDVI_PAGE_MASK_4K  (~((1ULL << AMDVI_PAGE_SHIFT_4K) - 1))
 200
 201 #define AMDVI_MAX_VA_ADDR          (48UL << 5)
 202 #define AMDVI_MAX_PH_ADDR          (40UL << 8)
 203 #define AMDVI_MAX_GVA_ADDR         (48UL << 15)
 204
 205 /* Completion Wait data size */
 206 #define AMDVI_COMPLETION_DATA_SIZE    8
 207
 208 #define AMDVI_COMMAND_SIZE   16
 209 /* Completion Wait data size */
 210 #define AMDVI_COMPLETION_DATA_SIZE    8
 211
 212 #define AMDVI_COMMAND_SIZE   16
 213
 214 #define AMDVI_INT_ADDR_FIRST 0xfee00000
 215 #define AMDVI_INT_ADDR_LAST  0xfeefffff
 216
 217 #define TYPE_AMD_IOMMU_DEVICE "amd-iommu"
 218 #define AMD_IOMMU_DEVICE(obj)\
 219     OBJECT_CHECK(AMDVIState, (obj), TYPE_AMD_IOMMU_DEVICE)
 220
 221 #define TYPE_AMD_IOMMU_PCI "AMDVI-PCI"
 222
 223 typedef struct AMDVIAddressSpace AMDVIAddressSpace;
 224
 225 /* functions to steal PCI config space */
 226 typedef struct AMDVIPCIState {
 227     PCIDevice dev;               /* The PCI device itself        */
 228 } AMDVIPCIState;
 229
 230 typedef struct AMDVIState {
 231     X86IOMMUState iommu;        /* IOMMU bus device             */
 232     AMDVIPCIState pci;          /* IOMMU PCI device             */
 233
 234     uint32_t version;
 235     uint32_t capab_offset;       /* capability offset pointer    */
 236
 237     uint64_t mmio_addr;
 238
 239     uint32_t devid;              /* auto-assigned devid          */
 240
 241     bool enabled;                /* IOMMU enabled                */
 242     bool ats_enabled;            /* address translation enabled  */
 243     bool cmdbuf_enabled;         /* command buffer enabled       */
 244     bool evtlog_enabled;         /* event log enabled            */
 245     bool excl_enabled;
 246
 247     hwaddr devtab;               /* base address device table    */
 248     size_t devtab_len;           /* device table length          */
 249
 250     hwaddr cmdbuf;               /* command buffer base address  */
 251     uint64_t cmdbuf_len;         /* command buffer length        */
 252     uint32_t cmdbuf_head;        /* current IOMMU read position  */
 253     uint32_t cmdbuf_tail;        /* next Software write position */
 254     bool completion_wait_intr;
 255
 256     hwaddr evtlog;               /* base address event log       */
 257     bool evtlog_intr;
 258     uint32_t evtlog_len;         /* event log length             */
 259     uint32_t evtlog_head;        /* current IOMMU write position */
 260     uint32_t evtlog_tail;        /* current Software read position */
 261
 262     /* unused for now */
 263     hwaddr excl_base;            /* base DVA - IOMMU exclusion range */
 264     hwaddr excl_limit;           /* limit of IOMMU exclusion range   */
 265     bool excl_allow;             /* translate accesses to the exclusion range */
 266     bool excl_enable;            /* exclusion range enabled          */
 267
 268     hwaddr ppr_log;              /* base address ppr log */
 269     uint32_t pprlog_len;         /* ppr log len  */
 270     uint32_t pprlog_head;        /* ppr log head */
 271     uint32_t pprlog_tail;        /* ppr log tail */
 272
 273     MemoryRegion mmio;                 /* MMIO region                  */
 274     uint8_t mmior[AMDVI_MMIO_SIZE];    /* read/write MMIO              */
 275     uint8_t w1cmask[AMDVI_MMIO_SIZE];  /* read/write 1 clear mask      */
 276     uint8_t romask[AMDVI_MMIO_SIZE];   /* MMIO read/only mask          */
 277     bool mmio_enabled;
 278
 279     /* IOMMU function */
 280     MemoryRegionIOMMUOps iommu_ops;
 281
 282     /* for each served device */
 283     AMDVIAddressSpace **address_spaces[PCI_BUS_MAX];
 284
 285     /* IOTLB */
 286     GHashTable *iotlb;
 287 } AMDVIState;
 288
 289 #endif