arch/riscv/include/uapi/asm/kvm.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  * Copyright (C) 2019 Western Digital Corporation or its affiliates.
   4  *
   5  * Authors:
   6  *     Anup Patel <anup.patel@wdc.com>
   7  */
   8
   9 #ifndef __LINUX_KVM_RISCV_H
  10 #define __LINUX_KVM_RISCV_H
  11
  12 #ifndef __ASSEMBLY__
  13
  14 #include <linux/types.h>
  15 #include <asm/bitsperlong.h>
  16 #include <asm/ptrace.h>
  17
  18 #define __KVM_HAVE_IRQ_LINE
  19
  20 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
  21
  22 #define KVM_INTERRUPT_SET       -1U
  23 #define KVM_INTERRUPT_UNSET     -2U
  24
  25 /* for KVM_GET_REGS and KVM_SET_REGS */
  26 struct kvm_regs {
  27 };
  28
  29 /* for KVM_GET_FPU and KVM_SET_FPU */
  30 struct kvm_fpu {
  31 };
  32
  33 /* KVM Debug exit structure */
  34 struct kvm_debug_exit_arch {
  35 };
  36
  37 /* for KVM_SET_GUEST_DEBUG */
  38 struct kvm_guest_debug_arch {
  39 };
  40
  41 /* definition of registers in kvm_run */
  42 struct kvm_sync_regs {
  43 };
  44
  45 /* for KVM_GET_SREGS and KVM_SET_SREGS */
  46 struct kvm_sregs {
  47 };
  48
  49 /* CONFIG registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
  50 struct kvm_riscv_config {
  51         unsigned long isa;
  52         unsigned long zicbom_block_size;
  53         unsigned long mvendorid;
  54         unsigned long marchid;
  55         unsigned long mimpid;
  56         unsigned long zicboz_block_size;
  57         unsigned long satp_mode;
  58 };
  59
  60 /* CORE registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
  61 struct kvm_riscv_core {
  62         struct user_regs_struct regs;
  63         unsigned long mode;
  64 };
  65
  66 /* Possible privilege modes for kvm_riscv_core */
  67 #define KVM_RISCV_MODE_S        1
  68 #define KVM_RISCV_MODE_U        0
  69
  70 /* General CSR registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
  71 struct kvm_riscv_csr {
  72         unsigned long sstatus;
  73         unsigned long sie;
  74         unsigned long stvec;
  75         unsigned long sscratch;
  76         unsigned long sepc;
  77         unsigned long scause;
  78         unsigned long stval;
  79         unsigned long sip;
  80         unsigned long satp;
  81         unsigned long scounteren;
  82         unsigned long senvcfg;
  83 };
  84
  85 /* AIA CSR registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
  86 struct kvm_riscv_aia_csr {
  87         unsigned long siselect;
  88         unsigned long iprio1;
  89         unsigned long iprio2;
  90         unsigned long sieh;
  91         unsigned long siph;
  92         unsigned long iprio1h;
  93         unsigned long iprio2h;
  94 };
  95
  96 /* Smstateen CSR for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
  97 struct kvm_riscv_smstateen_csr {
  98         unsigned long sstateen0;
  99 };
 100
 101 /* TIMER registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
 102 struct kvm_riscv_timer {
 103         __u64 frequency;
 104         __u64 time;
 105         __u64 compare;
 106         __u64 state;
 107 };
 108
 109 /*
 110  * ISA extension IDs specific to KVM. This is not the same as the host ISA
 111  * extension IDs as that is internal to the host and should not be exposed
 112  * to the guest. This should always be contiguous to keep the mapping simple
 113  * in KVM implementation.
 114  */
 115 enum KVM_RISCV_ISA_EXT_ID {
 116         KVM_RISCV_ISA_EXT_A = 0,
 117         KVM_RISCV_ISA_EXT_C,
 118         KVM_RISCV_ISA_EXT_D,
 119         KVM_RISCV_ISA_EXT_F,
 120         KVM_RISCV_ISA_EXT_H,
 121         KVM_RISCV_ISA_EXT_I,
 122         KVM_RISCV_ISA_EXT_M,
 123         KVM_RISCV_ISA_EXT_SVPBMT,
 124         KVM_RISCV_ISA_EXT_SSTC,
 125         KVM_RISCV_ISA_EXT_SVINVAL,
 126         KVM_RISCV_ISA_EXT_ZIHINTPAUSE,
 127         KVM_RISCV_ISA_EXT_ZICBOM,
 128         KVM_RISCV_ISA_EXT_ZICBOZ,
 129         KVM_RISCV_ISA_EXT_ZBB,
 130         KVM_RISCV_ISA_EXT_SSAIA,
 131         KVM_RISCV_ISA_EXT_V,
 132         KVM_RISCV_ISA_EXT_SVNAPOT,
 133         KVM_RISCV_ISA_EXT_ZBA,
 134         KVM_RISCV_ISA_EXT_ZBS,
 135         KVM_RISCV_ISA_EXT_ZICNTR,
 136         KVM_RISCV_ISA_EXT_ZICSR,
 137         KVM_RISCV_ISA_EXT_ZIFENCEI,
 138         KVM_RISCV_ISA_EXT_ZIHPM,
 139         KVM_RISCV_ISA_EXT_SMSTATEEN,
 140         KVM_RISCV_ISA_EXT_ZICOND,
 141         KVM_RISCV_ISA_EXT_ZBC,
 142         KVM_RISCV_ISA_EXT_ZBKB,
 143         KVM_RISCV_ISA_EXT_ZBKC,
 144         KVM_RISCV_ISA_EXT_ZBKX,
 145         KVM_RISCV_ISA_EXT_ZKND,
 146         KVM_RISCV_ISA_EXT_ZKNE,
 147         KVM_RISCV_ISA_EXT_ZKNH,
 148         KVM_RISCV_ISA_EXT_ZKR,
 149         KVM_RISCV_ISA_EXT_ZKSED,
 150         KVM_RISCV_ISA_EXT_ZKSH,
 151         KVM_RISCV_ISA_EXT_ZKT,
 152         KVM_RISCV_ISA_EXT_ZVBB,
 153         KVM_RISCV_ISA_EXT_ZVBC,
 154         KVM_RISCV_ISA_EXT_ZVKB,
 155         KVM_RISCV_ISA_EXT_ZVKG,
 156         KVM_RISCV_ISA_EXT_ZVKNED,
 157         KVM_RISCV_ISA_EXT_ZVKNHA,
 158         KVM_RISCV_ISA_EXT_ZVKNHB,
 159         KVM_RISCV_ISA_EXT_ZVKSED,
 160         KVM_RISCV_ISA_EXT_ZVKSH,
 161         KVM_RISCV_ISA_EXT_ZVKT,
 162         KVM_RISCV_ISA_EXT_ZFH,
 163         KVM_RISCV_ISA_EXT_ZFHMIN,
 164         KVM_RISCV_ISA_EXT_ZIHINTNTL,
 165         KVM_RISCV_ISA_EXT_ZVFH,
 166         KVM_RISCV_ISA_EXT_ZVFHMIN,
 167         KVM_RISCV_ISA_EXT_ZFA,
 168         KVM_RISCV_ISA_EXT_ZTSO,
 169         KVM_RISCV_ISA_EXT_ZACAS,
 170         KVM_RISCV_ISA_EXT_SSCOFPMF,
 171         KVM_RISCV_ISA_EXT_ZIMOP,
 172         KVM_RISCV_ISA_EXT_ZCA,
 173         KVM_RISCV_ISA_EXT_ZCB,
 174         KVM_RISCV_ISA_EXT_ZCD,
 175         KVM_RISCV_ISA_EXT_ZCF,
 176         KVM_RISCV_ISA_EXT_ZCMOP,
 177         KVM_RISCV_ISA_EXT_ZAWRS,
 178         KVM_RISCV_ISA_EXT_MAX,
 179 };
 180
 181 /*
 182  * SBI extension IDs specific to KVM. This is not the same as the SBI
 183  * extension IDs defined by the RISC-V SBI specification.
 184  */
 185 enum KVM_RISCV_SBI_EXT_ID {
 186         KVM_RISCV_SBI_EXT_V01 = 0,
 187         KVM_RISCV_SBI_EXT_TIME,
 188         KVM_RISCV_SBI_EXT_IPI,
 189         KVM_RISCV_SBI_EXT_RFENCE,
 190         KVM_RISCV_SBI_EXT_SRST,
 191         KVM_RISCV_SBI_EXT_HSM,
 192         KVM_RISCV_SBI_EXT_PMU,
 193         KVM_RISCV_SBI_EXT_EXPERIMENTAL,
 194         KVM_RISCV_SBI_EXT_VENDOR,
 195         KVM_RISCV_SBI_EXT_DBCN,
 196         KVM_RISCV_SBI_EXT_STA,
 197         KVM_RISCV_SBI_EXT_MAX,
 198 };
 199
 200 /* SBI STA extension registers for KVM_GET_ONE_REG and KVM_SET_ONE_REG */
 201 struct kvm_riscv_sbi_sta {
 202         unsigned long shmem_lo;
 203         unsigned long shmem_hi;
 204 };
 205
 206 /* Possible states for kvm_riscv_timer */
 207 #define KVM_RISCV_TIMER_STATE_OFF       0
 208 #define KVM_RISCV_TIMER_STATE_ON        1
 209
 210 #define KVM_REG_SIZE(id)                \
 211         (1U << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))
 212
 213 /* If you need to interpret the index values, here is the key: */
 214 #define KVM_REG_RISCV_TYPE_MASK         0x00000000FF000000
 215 #define KVM_REG_RISCV_TYPE_SHIFT        24
 216 #define KVM_REG_RISCV_SUBTYPE_MASK      0x0000000000FF0000
 217 #define KVM_REG_RISCV_SUBTYPE_SHIFT     16
 218
 219 /* Config registers are mapped as type 1 */
 220 #define KVM_REG_RISCV_CONFIG            (0x01 << KVM_REG_RISCV_TYPE_SHIFT)
 221 #define KVM_REG_RISCV_CONFIG_REG(name)  \
 222         (offsetof(struct kvm_riscv_config, name) / sizeof(unsigned long))
 223
 224 /* Core registers are mapped as type 2 */
 225 #define KVM_REG_RISCV_CORE              (0x02 << KVM_REG_RISCV_TYPE_SHIFT)
 226 #define KVM_REG_RISCV_CORE_REG(name)    \
 227                 (offsetof(struct kvm_riscv_core, name) / sizeof(unsigned long))
 228
 229 /* Control and status registers are mapped as type 3 */
 230 #define KVM_REG_RISCV_CSR               (0x03 << KVM_REG_RISCV_TYPE_SHIFT)
 231 #define KVM_REG_RISCV_CSR_GENERAL       (0x0 << KVM_REG_RISCV_SUBTYPE_SHIFT)
 232 #define KVM_REG_RISCV_CSR_AIA           (0x1 << KVM_REG_RISCV_SUBTYPE_SHIFT)
 233 #define KVM_REG_RISCV_CSR_SMSTATEEN     (0x2 << KVM_REG_RISCV_SUBTYPE_SHIFT)
 234 #define KVM_REG_RISCV_CSR_REG(name)     \
 235                 (offsetof(struct kvm_riscv_csr, name) / sizeof(unsigned long))
 236 #define KVM_REG_RISCV_CSR_AIA_REG(name) \
 237         (offsetof(struct kvm_riscv_aia_csr, name) / sizeof(unsigned long))
 238 #define KVM_REG_RISCV_CSR_SMSTATEEN_REG(name)  \
 239         (offsetof(struct kvm_riscv_smstateen_csr, name) / sizeof(unsigned long))
 240
 241 /* Timer registers are mapped as type 4 */
 242 #define KVM_REG_RISCV_TIMER             (0x04 << KVM_REG_RISCV_TYPE_SHIFT)
 243 #define KVM_REG_RISCV_TIMER_REG(name)   \
 244                 (offsetof(struct kvm_riscv_timer, name) / sizeof(__u64))
 245
 246 /* F extension registers are mapped as type 5 */
 247 #define KVM_REG_RISCV_FP_F              (0x05 << KVM_REG_RISCV_TYPE_SHIFT)
 248 #define KVM_REG_RISCV_FP_F_REG(name)    \
 249                 (offsetof(struct __riscv_f_ext_state, name) / sizeof(__u32))
 250
 251 /* D extension registers are mapped as type 6 */
 252 #define KVM_REG_RISCV_FP_D              (0x06 << KVM_REG_RISCV_TYPE_SHIFT)
 253 #define KVM_REG_RISCV_FP_D_REG(name)    \
 254                 (offsetof(struct __riscv_d_ext_state, name) / sizeof(__u64))
 255
 256 /* ISA Extension registers are mapped as type 7 */
 257 #define KVM_REG_RISCV_ISA_EXT           (0x07 << KVM_REG_RISCV_TYPE_SHIFT)
 258 #define KVM_REG_RISCV_ISA_SINGLE        (0x0 << KVM_REG_RISCV_SUBTYPE_SHIFT)
 259 #define KVM_REG_RISCV_ISA_MULTI_EN      (0x1 << KVM_REG_RISCV_SUBTYPE_SHIFT)
 260 #define KVM_REG_RISCV_ISA_MULTI_DIS     (0x2 << KVM_REG_RISCV_SUBTYPE_SHIFT)
 261 #define KVM_REG_RISCV_ISA_MULTI_REG(__ext_id)   \
 262                 ((__ext_id) / __BITS_PER_LONG)
 263 #define KVM_REG_RISCV_ISA_MULTI_MASK(__ext_id)  \
 264                 (1UL << ((__ext_id) % __BITS_PER_LONG))
 265 #define KVM_REG_RISCV_ISA_MULTI_REG_LAST        \
 266                 KVM_REG_RISCV_ISA_MULTI_REG(KVM_RISCV_ISA_EXT_MAX - 1)
 267
 268 /* SBI extension registers are mapped as type 8 */
 269 #define KVM_REG_RISCV_SBI_EXT           (0x08 << KVM_REG_RISCV_TYPE_SHIFT)
 270 #define KVM_REG_RISCV_SBI_SINGLE        (0x0 << KVM_REG_RISCV_SUBTYPE_SHIFT)
 271 #define KVM_REG_RISCV_SBI_MULTI_EN      (0x1 << KVM_REG_RISCV_SUBTYPE_SHIFT)
 272 #define KVM_REG_RISCV_SBI_MULTI_DIS     (0x2 << KVM_REG_RISCV_SUBTYPE_SHIFT)
 273 #define KVM_REG_RISCV_SBI_MULTI_REG(__ext_id)   \
 274                 ((__ext_id) / __BITS_PER_LONG)
 275 #define KVM_REG_RISCV_SBI_MULTI_MASK(__ext_id)  \
 276                 (1UL << ((__ext_id) % __BITS_PER_LONG))
 277 #define KVM_REG_RISCV_SBI_MULTI_REG_LAST        \
 278                 KVM_REG_RISCV_SBI_MULTI_REG(KVM_RISCV_SBI_EXT_MAX - 1)
 279
 280 /* V extension registers are mapped as type 9 */
 281 #define KVM_REG_RISCV_VECTOR            (0x09 << KVM_REG_RISCV_TYPE_SHIFT)
 282 #define KVM_REG_RISCV_VECTOR_CSR_REG(name)      \
 283                 (offsetof(struct __riscv_v_ext_state, name) / sizeof(unsigned long))
 284 #define KVM_REG_RISCV_VECTOR_REG(n)     \
 285                 ((n) + sizeof(struct __riscv_v_ext_state) / sizeof(unsigned long))
 286
 287 /* Registers for specific SBI extensions are mapped as type 10 */
 288 #define KVM_REG_RISCV_SBI_STATE         (0x0a << KVM_REG_RISCV_TYPE_SHIFT)
 289 #define KVM_REG_RISCV_SBI_STA           (0x0 << KVM_REG_RISCV_SUBTYPE_SHIFT)
 290 #define KVM_REG_RISCV_SBI_STA_REG(name)         \
 291                 (offsetof(struct kvm_riscv_sbi_sta, name) / sizeof(unsigned long))
 292
 293 /* Device Control API: RISC-V AIA */
 294 #define KVM_DEV_RISCV_APLIC_ALIGN               0x1000
 295 #define KVM_DEV_RISCV_APLIC_SIZE                0x4000
 296 #define KVM_DEV_RISCV_APLIC_MAX_HARTS           0x4000
 297 #define KVM_DEV_RISCV_IMSIC_ALIGN               0x1000
 298 #define KVM_DEV_RISCV_IMSIC_SIZE                0x1000
 299
 300 #define KVM_DEV_RISCV_AIA_GRP_CONFIG            0
 301 #define KVM_DEV_RISCV_AIA_CONFIG_MODE           0
 302 #define KVM_DEV_RISCV_AIA_CONFIG_IDS            1
 303 #define KVM_DEV_RISCV_AIA_CONFIG_SRCS           2
 304 #define KVM_DEV_RISCV_AIA_CONFIG_GROUP_BITS     3
 305 #define KVM_DEV_RISCV_AIA_CONFIG_GROUP_SHIFT    4
 306 #define KVM_DEV_RISCV_AIA_CONFIG_HART_BITS      5
 307 #define KVM_DEV_RISCV_AIA_CONFIG_GUEST_BITS     6
 308
 309 /*
 310  * Modes of RISC-V AIA device:
 311  * 1) EMUL (aka Emulation): Trap-n-emulate IMSIC
 312  * 2) HWACCEL (aka HW Acceleration): Virtualize IMSIC using IMSIC guest files
 313  * 3) AUTO (aka Automatic): Virtualize IMSIC using IMSIC guest files whenever
 314  *    available otherwise fallback to trap-n-emulation
 315  */
 316 #define KVM_DEV_RISCV_AIA_MODE_EMUL             0
 317 #define KVM_DEV_RISCV_AIA_MODE_HWACCEL          1
 318 #define KVM_DEV_RISCV_AIA_MODE_AUTO             2
 319
 320 #define KVM_DEV_RISCV_AIA_IDS_MIN               63
 321 #define KVM_DEV_RISCV_AIA_IDS_MAX               2048
 322 #define KVM_DEV_RISCV_AIA_SRCS_MAX              1024
 323 #define KVM_DEV_RISCV_AIA_GROUP_BITS_MAX        8
 324 #define KVM_DEV_RISCV_AIA_GROUP_SHIFT_MIN       24
 325 #define KVM_DEV_RISCV_AIA_GROUP_SHIFT_MAX       56
 326 #define KVM_DEV_RISCV_AIA_HART_BITS_MAX         16
 327 #define KVM_DEV_RISCV_AIA_GUEST_BITS_MAX        8
 328
 329 #define KVM_DEV_RISCV_AIA_GRP_ADDR              1
 330 #define KVM_DEV_RISCV_AIA_ADDR_APLIC            0
 331 #define KVM_DEV_RISCV_AIA_ADDR_IMSIC(__vcpu)    (1 + (__vcpu))
 332 #define KVM_DEV_RISCV_AIA_ADDR_MAX              \
 333                 (1 + KVM_DEV_RISCV_APLIC_MAX_HARTS)
 334
 335 #define KVM_DEV_RISCV_AIA_GRP_CTRL              2
 336 #define KVM_DEV_RISCV_AIA_CTRL_INIT             0
 337
 338 /*
 339  * The device attribute type contains the memory mapped offset of the
 340  * APLIC register (range 0x0000-0x3FFF) and it must be 4-byte aligned.
 341  */
 342 #define KVM_DEV_RISCV_AIA_GRP_APLIC             3
 343
 344 /*
 345  * The lower 12-bits of the device attribute type contains the iselect
 346  * value of the IMSIC register (range 0x70-0xFF) whereas the higher order
 347  * bits contains the VCPU id.
 348  */
 349 #define KVM_DEV_RISCV_AIA_GRP_IMSIC             4
 350 #define KVM_DEV_RISCV_AIA_IMSIC_ISEL_BITS       12
 351 #define KVM_DEV_RISCV_AIA_IMSIC_ISEL_MASK       \
 352                 ((1U << KVM_DEV_RISCV_AIA_IMSIC_ISEL_BITS) - 1)
 353 #define KVM_DEV_RISCV_AIA_IMSIC_MKATTR(__vcpu, __isel)  \
 354                 (((__vcpu) << KVM_DEV_RISCV_AIA_IMSIC_ISEL_BITS) | \
 355                  ((__isel) & KVM_DEV_RISCV_AIA_IMSIC_ISEL_MASK))
 356 #define KVM_DEV_RISCV_AIA_IMSIC_GET_ISEL(__attr)        \
 357                 ((__attr) & KVM_DEV_RISCV_AIA_IMSIC_ISEL_MASK)
 358 #define KVM_DEV_RISCV_AIA_IMSIC_GET_VCPU(__attr)        \
 359                 ((__attr) >> KVM_DEV_RISCV_AIA_IMSIC_ISEL_BITS)
 360
 361 /* One single KVM irqchip, ie. the AIA */
 362 #define KVM_NR_IRQCHIPS                 1
 363
 364 #endif
 365
 366 #endif /* __LINUX_KVM_RISCV_H */