linux-headers/asm-arm/kvm.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  * Copyright (C) 2012 - Virtual Open Systems and Columbia University
   4  * Author: Christoffer Dall <c.dall@virtualopensystems.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License, version 2, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  */
  19
  20 #ifndef __ARM_KVM_H__
  21 #define __ARM_KVM_H__
  22
  23 #include <linux/types.h>
  24 #include <linux/psci.h>
  25 #include <asm/ptrace.h>
  26
  27 #define __KVM_HAVE_GUEST_DEBUG
  28 #define __KVM_HAVE_IRQ_LINE
  29 #define __KVM_HAVE_READONLY_MEM
  30 #define __KVM_HAVE_VCPU_EVENTS
  31
  32 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
  33
  34 #define KVM_REG_SIZE(id)                                                \
  35         (1U << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))
  36
  37 /* Valid for svc_regs, abt_regs, und_regs, irq_regs in struct kvm_regs */
  38 #define KVM_ARM_SVC_sp          svc_regs[0]
  39 #define KVM_ARM_SVC_lr          svc_regs[1]
  40 #define KVM_ARM_SVC_spsr        svc_regs[2]
  41 #define KVM_ARM_ABT_sp          abt_regs[0]
  42 #define KVM_ARM_ABT_lr          abt_regs[1]
  43 #define KVM_ARM_ABT_spsr        abt_regs[2]
  44 #define KVM_ARM_UND_sp          und_regs[0]
  45 #define KVM_ARM_UND_lr          und_regs[1]
  46 #define KVM_ARM_UND_spsr        und_regs[2]
  47 #define KVM_ARM_IRQ_sp          irq_regs[0]
  48 #define KVM_ARM_IRQ_lr          irq_regs[1]
  49 #define KVM_ARM_IRQ_spsr        irq_regs[2]
  50
  51 /* Valid only for fiq_regs in struct kvm_regs */
  52 #define KVM_ARM_FIQ_r8          fiq_regs[0]
  53 #define KVM_ARM_FIQ_r9          fiq_regs[1]
  54 #define KVM_ARM_FIQ_r10         fiq_regs[2]
  55 #define KVM_ARM_FIQ_fp          fiq_regs[3]
  56 #define KVM_ARM_FIQ_ip          fiq_regs[4]
  57 #define KVM_ARM_FIQ_sp          fiq_regs[5]
  58 #define KVM_ARM_FIQ_lr          fiq_regs[6]
  59 #define KVM_ARM_FIQ_spsr        fiq_regs[7]
  60
  61 struct kvm_regs {
  62         struct pt_regs usr_regs;        /* R0_usr - R14_usr, PC, CPSR */
  63         unsigned long svc_regs[3];      /* SP_svc, LR_svc, SPSR_svc */
  64         unsigned long abt_regs[3];      /* SP_abt, LR_abt, SPSR_abt */
  65         unsigned long und_regs[3];      /* SP_und, LR_und, SPSR_und */
  66         unsigned long irq_regs[3];      /* SP_irq, LR_irq, SPSR_irq */
  67         unsigned long fiq_regs[8];      /* R8_fiq - R14_fiq, SPSR_fiq */
  68 };
  69
  70 /* Supported Processor Types */
  71 #define KVM_ARM_TARGET_CORTEX_A15       0
  72 #define KVM_ARM_TARGET_CORTEX_A7        1
  73 #define KVM_ARM_NUM_TARGETS             2
  74
  75 /* KVM_ARM_SET_DEVICE_ADDR ioctl id encoding */
  76 #define KVM_ARM_DEVICE_TYPE_SHIFT       0
  77 #define KVM_ARM_DEVICE_TYPE_MASK        (0xffff << KVM_ARM_DEVICE_TYPE_SHIFT)
  78 #define KVM_ARM_DEVICE_ID_SHIFT         16
  79 #define KVM_ARM_DEVICE_ID_MASK          (0xffff << KVM_ARM_DEVICE_ID_SHIFT)
  80
  81 /* Supported device IDs */
  82 #define KVM_ARM_DEVICE_VGIC_V2          0
  83
  84 /* Supported VGIC address types  */
  85 #define KVM_VGIC_V2_ADDR_TYPE_DIST      0
  86 #define KVM_VGIC_V2_ADDR_TYPE_CPU       1
  87
  88 #define KVM_VGIC_V2_DIST_SIZE           0x1000
  89 #define KVM_VGIC_V2_CPU_SIZE            0x2000
  90
  91 /* Supported VGICv3 address types  */
  92 #define KVM_VGIC_V3_ADDR_TYPE_DIST      2
  93 #define KVM_VGIC_V3_ADDR_TYPE_REDIST    3
  94 #define KVM_VGIC_ITS_ADDR_TYPE          4
  95 #define KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION     5
  96
  97 #define KVM_VGIC_V3_DIST_SIZE           SZ_64K
  98 #define KVM_VGIC_V3_REDIST_SIZE         (2 * SZ_64K)
  99 #define KVM_VGIC_V3_ITS_SIZE            (2 * SZ_64K)
 100
 101 #define KVM_ARM_VCPU_POWER_OFF          0 /* CPU is started in OFF state */
 102 #define KVM_ARM_VCPU_PSCI_0_2           1 /* CPU uses PSCI v0.2 */
 103
 104 struct kvm_vcpu_init {
 105         __u32 target;
 106         __u32 features[7];
 107 };
 108
 109 struct kvm_sregs {
 110 };
 111
 112 struct kvm_fpu {
 113 };
 114
 115 struct kvm_guest_debug_arch {
 116 };
 117
 118 struct kvm_debug_exit_arch {
 119 };
 120
 121 struct kvm_sync_regs {
 122         /* Used with KVM_CAP_ARM_USER_IRQ */
 123         __u64 device_irq_level;
 124 };
 125
 126 struct kvm_arch_memory_slot {
 127 };
 128
 129 /* for KVM_GET/SET_VCPU_EVENTS */
 130 struct kvm_vcpu_events {
 131         struct {
 132                 __u8 serror_pending;
 133                 __u8 serror_has_esr;
 134                 /* Align it to 8 bytes */
 135                 __u8 pad[6];
 136                 __u64 serror_esr;
 137         } exception;
 138         __u32 reserved[12];
 139 };
 140
 141 /* If you need to interpret the index values, here is the key: */
 142 #define KVM_REG_ARM_COPROC_MASK         0x000000000FFF0000
 143 #define KVM_REG_ARM_COPROC_SHIFT        16
 144 #define KVM_REG_ARM_32_OPC2_MASK        0x0000000000000007
 145 #define KVM_REG_ARM_32_OPC2_SHIFT       0
 146 #define KVM_REG_ARM_OPC1_MASK           0x0000000000000078
 147 #define KVM_REG_ARM_OPC1_SHIFT          3
 148 #define KVM_REG_ARM_CRM_MASK            0x0000000000000780
 149 #define KVM_REG_ARM_CRM_SHIFT           7
 150 #define KVM_REG_ARM_32_CRN_MASK         0x0000000000007800
 151 #define KVM_REG_ARM_32_CRN_SHIFT        11
 152 /*
 153  * For KVM currently all guest registers are nonsecure, but we reserve a bit
 154  * in the encoding to distinguish secure from nonsecure for AArch32 system
 155  * registers that are banked by security. This is 1 for the secure banked
 156  * register, and 0 for the nonsecure banked register or if the register is
 157  * not banked by security.
 158  */
 159 #define KVM_REG_ARM_SECURE_MASK 0x0000000010000000
 160 #define KVM_REG_ARM_SECURE_SHIFT        28
 161
 162 #define ARM_CP15_REG_SHIFT_MASK(x,n) \
 163         (((x) << KVM_REG_ARM_ ## n ## _SHIFT) & KVM_REG_ARM_ ## n ## _MASK)
 164
 165 #define __ARM_CP15_REG(op1,crn,crm,op2) \
 166         (KVM_REG_ARM | (15 << KVM_REG_ARM_COPROC_SHIFT) | \
 167         ARM_CP15_REG_SHIFT_MASK(op1, OPC1) | \
 168         ARM_CP15_REG_SHIFT_MASK(crn, 32_CRN) | \
 169         ARM_CP15_REG_SHIFT_MASK(crm, CRM) | \
 170         ARM_CP15_REG_SHIFT_MASK(op2, 32_OPC2))
 171
 172 #define ARM_CP15_REG32(...) (__ARM_CP15_REG(__VA_ARGS__) | KVM_REG_SIZE_U32)
 173
 174 #define __ARM_CP15_REG64(op1,crm) \
 175         (__ARM_CP15_REG(op1, 0, crm, 0) | KVM_REG_SIZE_U64)
 176 #define ARM_CP15_REG64(...) __ARM_CP15_REG64(__VA_ARGS__)
 177
 178 /* PL1 Physical Timer Registers */
 179 #define KVM_REG_ARM_PTIMER_CTL          ARM_CP15_REG32(0, 14, 2, 1)
 180 #define KVM_REG_ARM_PTIMER_CNT          ARM_CP15_REG64(0, 14)
 181 #define KVM_REG_ARM_PTIMER_CVAL         ARM_CP15_REG64(2, 14)
 182
 183 /* Virtual Timer Registers */
 184 #define KVM_REG_ARM_TIMER_CTL           ARM_CP15_REG32(0, 14, 3, 1)
 185 #define KVM_REG_ARM_TIMER_CNT           ARM_CP15_REG64(1, 14)
 186 #define KVM_REG_ARM_TIMER_CVAL          ARM_CP15_REG64(3, 14)
 187
 188 /* Normal registers are mapped as coprocessor 16. */
 189 #define KVM_REG_ARM_CORE                (0x0010 << KVM_REG_ARM_COPROC_SHIFT)
 190 #define KVM_REG_ARM_CORE_REG(name)      (offsetof(struct kvm_regs, name) / 4)
 191
 192 /* Some registers need more space to represent values. */
 193 #define KVM_REG_ARM_DEMUX               (0x0011 << KVM_REG_ARM_COPROC_SHIFT)
 194 #define KVM_REG_ARM_DEMUX_ID_MASK       0x000000000000FF00
 195 #define KVM_REG_ARM_DEMUX_ID_SHIFT      8
 196 #define KVM_REG_ARM_DEMUX_ID_CCSIDR     (0x00 << KVM_REG_ARM_DEMUX_ID_SHIFT)
 197 #define KVM_REG_ARM_DEMUX_VAL_MASK      0x00000000000000FF
 198 #define KVM_REG_ARM_DEMUX_VAL_SHIFT     0
 199
 200 /* VFP registers: we could overload CP10 like ARM does, but that's ugly. */
 201 #define KVM_REG_ARM_VFP                 (0x0012 << KVM_REG_ARM_COPROC_SHIFT)
 202 #define KVM_REG_ARM_VFP_MASK            0x000000000000FFFF
 203 #define KVM_REG_ARM_VFP_BASE_REG        0x0
 204 #define KVM_REG_ARM_VFP_FPSID           0x1000
 205 #define KVM_REG_ARM_VFP_FPSCR           0x1001
 206 #define KVM_REG_ARM_VFP_MVFR1           0x1006
 207 #define KVM_REG_ARM_VFP_MVFR0           0x1007
 208 #define KVM_REG_ARM_VFP_FPEXC           0x1008
 209 #define KVM_REG_ARM_VFP_FPINST          0x1009
 210 #define KVM_REG_ARM_VFP_FPINST2         0x100A
 211
 212 /* KVM-as-firmware specific pseudo-registers */
 213 #define KVM_REG_ARM_FW                  (0x0014 << KVM_REG_ARM_COPROC_SHIFT)
 214 #define KVM_REG_ARM_FW_REG(r)           (KVM_REG_ARM | KVM_REG_SIZE_U64 | \
 215                                          KVM_REG_ARM_FW | ((r) & 0xffff))
 216 #define KVM_REG_ARM_PSCI_VERSION        KVM_REG_ARM_FW_REG(0)
 217 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1     KVM_REG_ARM_FW_REG(1)
 218         /* Higher values mean better protection. */
 219 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_NOT_AVAIL           0
 220 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_AVAIL               1
 221 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_NOT_REQUIRED        2
 222 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2     KVM_REG_ARM_FW_REG(2)
 223         /* Higher values mean better protection. */
 224 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_NOT_AVAIL           0
 225 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_UNKNOWN             1
 226 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_AVAIL               2
 227 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_NOT_REQUIRED        3
 228 #define KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_ENABLED     (1U << 4)
 229
 230 /* Device Control API: ARM VGIC */
 231 #define KVM_DEV_ARM_VGIC_GRP_ADDR       0
 232 #define KVM_DEV_ARM_VGIC_GRP_DIST_REGS  1
 233 #define KVM_DEV_ARM_VGIC_GRP_CPU_REGS   2
 234 #define   KVM_DEV_ARM_VGIC_CPUID_SHIFT  32
 235 #define   KVM_DEV_ARM_VGIC_CPUID_MASK   (0xffULL << KVM_DEV_ARM_VGIC_CPUID_SHIFT)
 236 #define   KVM_DEV_ARM_VGIC_V3_MPIDR_SHIFT 32
 237 #define   KVM_DEV_ARM_VGIC_V3_MPIDR_MASK \
 238                         (0xffffffffULL << KVM_DEV_ARM_VGIC_V3_MPIDR_SHIFT)
 239 #define   KVM_DEV_ARM_VGIC_OFFSET_SHIFT 0
 240 #define   KVM_DEV_ARM_VGIC_OFFSET_MASK  (0xffffffffULL << KVM_DEV_ARM_VGIC_OFFSET_SHIFT)
 241 #define   KVM_DEV_ARM_VGIC_SYSREG_INSTR_MASK (0xffff)
 242 #define KVM_DEV_ARM_VGIC_GRP_NR_IRQS    3
 243 #define KVM_DEV_ARM_VGIC_GRP_CTRL       4
 244 #define KVM_DEV_ARM_VGIC_GRP_REDIST_REGS 5
 245 #define KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS 6
 246 #define KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO  7
 247 #define KVM_DEV_ARM_VGIC_GRP_ITS_REGS   8
 248 #define KVM_DEV_ARM_VGIC_LINE_LEVEL_INFO_SHIFT  10
 249 #define KVM_DEV_ARM_VGIC_LINE_LEVEL_INFO_MASK \
 250                         (0x3fffffULL << KVM_DEV_ARM_VGIC_LINE_LEVEL_INFO_SHIFT)
 251 #define KVM_DEV_ARM_VGIC_LINE_LEVEL_INTID_MASK 0x3ff
 252 #define VGIC_LEVEL_INFO_LINE_LEVEL      0
 253
 254 /* Device Control API on vcpu fd */
 255 #define KVM_ARM_VCPU_PMU_V3_CTRL        0
 256 #define   KVM_ARM_VCPU_PMU_V3_IRQ       0
 257 #define   KVM_ARM_VCPU_PMU_V3_INIT      1
 258 #define KVM_ARM_VCPU_TIMER_CTRL         1
 259 #define   KVM_ARM_VCPU_TIMER_IRQ_VTIMER         0
 260 #define   KVM_ARM_VCPU_TIMER_IRQ_PTIMER         1
 261
 262 #define   KVM_DEV_ARM_VGIC_CTRL_INIT            0
 263 #define   KVM_DEV_ARM_ITS_SAVE_TABLES           1
 264 #define   KVM_DEV_ARM_ITS_RESTORE_TABLES        2
 265 #define   KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES  3
 266 #define   KVM_DEV_ARM_ITS_CTRL_RESET            4
 267
 268 /* KVM_IRQ_LINE irq field index values */
 269 #define KVM_ARM_IRQ_VCPU2_SHIFT         28
 270 #define KVM_ARM_IRQ_VCPU2_MASK          0xf
 271 #define KVM_ARM_IRQ_TYPE_SHIFT          24
 272 #define KVM_ARM_IRQ_TYPE_MASK           0xf
 273 #define KVM_ARM_IRQ_VCPU_SHIFT          16
 274 #define KVM_ARM_IRQ_VCPU_MASK           0xff
 275 #define KVM_ARM_IRQ_NUM_SHIFT           0
 276 #define KVM_ARM_IRQ_NUM_MASK            0xffff
 277
 278 /* irq_type field */
 279 #define KVM_ARM_IRQ_TYPE_CPU            0
 280 #define KVM_ARM_IRQ_TYPE_SPI            1
 281 #define KVM_ARM_IRQ_TYPE_PPI            2
 282
 283 /* out-of-kernel GIC cpu interrupt injection irq_number field */
 284 #define KVM_ARM_IRQ_CPU_IRQ             0
 285 #define KVM_ARM_IRQ_CPU_FIQ             1
 286
 287 /*
 288  * This used to hold the highest supported SPI, but it is now obsolete
 289  * and only here to provide source code level compatibility with older
 290  * userland. The highest SPI number can be set via KVM_DEV_ARM_VGIC_GRP_NR_IRQS.
 291  */
 292 #define KVM_ARM_IRQ_GIC_MAX             127
 293
 294 /* One single KVM irqchip, ie. the VGIC */
 295 #define KVM_NR_IRQCHIPS          1
 296
 297 /* PSCI interface */
 298 #define KVM_PSCI_FN_BASE                0x95c1ba5e
 299 #define KVM_PSCI_FN(n)                  (KVM_PSCI_FN_BASE + (n))
 300
 301 #define KVM_PSCI_FN_CPU_SUSPEND         KVM_PSCI_FN(0)
 302 #define KVM_PSCI_FN_CPU_OFF             KVM_PSCI_FN(1)
 303 #define KVM_PSCI_FN_CPU_ON              KVM_PSCI_FN(2)
 304 #define KVM_PSCI_FN_MIGRATE             KVM_PSCI_FN(3)
 305
 306 #define KVM_PSCI_RET_SUCCESS            PSCI_RET_SUCCESS
 307 #define KVM_PSCI_RET_NI                 PSCI_RET_NOT_SUPPORTED
 308 #define KVM_PSCI_RET_INVAL              PSCI_RET_INVALID_PARAMS
 309 #define KVM_PSCI_RET_DENIED             PSCI_RET_DENIED
 310
 311 #endif /* __ARM_KVM_H__ */