linux-headers/asm-arm/kvm.h

   1 /*
   2  * Copyright (C) 2012 - Virtual Open Systems and Columbia University
   3  * Author: Christoffer Dall <c.dall@virtualopensystems.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License, version 2, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17  */
  18
  19 #ifndef __ARM_KVM_H__
  20 #define __ARM_KVM_H__
  21
  22 #include <linux/types.h>
  23 #include <linux/psci.h>
  24 #include <asm/ptrace.h>
  25
  26 #define __KVM_HAVE_GUEST_DEBUG
  27 #define __KVM_HAVE_IRQ_LINE
  28 #define __KVM_HAVE_READONLY_MEM
  29
  30 #define KVM_REG_SIZE(id)                                                \
  31         (1U << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))
  32
  33 /* Valid for svc_regs, abt_regs, und_regs, irq_regs in struct kvm_regs */
  34 #define KVM_ARM_SVC_sp          svc_regs[0]
  35 #define KVM_ARM_SVC_lr          svc_regs[1]
  36 #define KVM_ARM_SVC_spsr        svc_regs[2]
  37 #define KVM_ARM_ABT_sp          abt_regs[0]
  38 #define KVM_ARM_ABT_lr          abt_regs[1]
  39 #define KVM_ARM_ABT_spsr        abt_regs[2]
  40 #define KVM_ARM_UND_sp          und_regs[0]
  41 #define KVM_ARM_UND_lr          und_regs[1]
  42 #define KVM_ARM_UND_spsr        und_regs[2]
  43 #define KVM_ARM_IRQ_sp          irq_regs[0]
  44 #define KVM_ARM_IRQ_lr          irq_regs[1]
  45 #define KVM_ARM_IRQ_spsr        irq_regs[2]
  46
  47 /* Valid only for fiq_regs in struct kvm_regs */
  48 #define KVM_ARM_FIQ_r8          fiq_regs[0]
  49 #define KVM_ARM_FIQ_r9          fiq_regs[1]
  50 #define KVM_ARM_FIQ_r10         fiq_regs[2]
  51 #define KVM_ARM_FIQ_fp          fiq_regs[3]
  52 #define KVM_ARM_FIQ_ip          fiq_regs[4]
  53 #define KVM_ARM_FIQ_sp          fiq_regs[5]
  54 #define KVM_ARM_FIQ_lr          fiq_regs[6]
  55 #define KVM_ARM_FIQ_spsr        fiq_regs[7]
  56
  57 struct kvm_regs {
  58         struct pt_regs usr_regs;        /* R0_usr - R14_usr, PC, CPSR */
  59         unsigned long svc_regs[3];      /* SP_svc, LR_svc, SPSR_svc */
  60         unsigned long abt_regs[3];      /* SP_abt, LR_abt, SPSR_abt */
  61         unsigned long und_regs[3];      /* SP_und, LR_und, SPSR_und */
  62         unsigned long irq_regs[3];      /* SP_irq, LR_irq, SPSR_irq */
  63         unsigned long fiq_regs[8];      /* R8_fiq - R14_fiq, SPSR_fiq */
  64 };
  65
  66 /* Supported Processor Types */
  67 #define KVM_ARM_TARGET_CORTEX_A15       0
  68 #define KVM_ARM_TARGET_CORTEX_A7        1
  69 #define KVM_ARM_NUM_TARGETS             2
  70
  71 /* KVM_ARM_SET_DEVICE_ADDR ioctl id encoding */
  72 #define KVM_ARM_DEVICE_TYPE_SHIFT       0
  73 #define KVM_ARM_DEVICE_TYPE_MASK        (0xffff << KVM_ARM_DEVICE_TYPE_SHIFT)
  74 #define KVM_ARM_DEVICE_ID_SHIFT         16
  75 #define KVM_ARM_DEVICE_ID_MASK          (0xffff << KVM_ARM_DEVICE_ID_SHIFT)
  76
  77 /* Supported device IDs */
  78 #define KVM_ARM_DEVICE_VGIC_V2          0
  79
  80 /* Supported VGIC address types  */
  81 #define KVM_VGIC_V2_ADDR_TYPE_DIST      0
  82 #define KVM_VGIC_V2_ADDR_TYPE_CPU       1
  83
  84 #define KVM_VGIC_V2_DIST_SIZE           0x1000
  85 #define KVM_VGIC_V2_CPU_SIZE            0x2000
  86
  87 /* Supported VGICv3 address types  */
  88 #define KVM_VGIC_V3_ADDR_TYPE_DIST      2
  89 #define KVM_VGIC_V3_ADDR_TYPE_REDIST    3
  90
  91 #define KVM_VGIC_V3_DIST_SIZE           SZ_64K
  92 #define KVM_VGIC_V3_REDIST_SIZE         (2 * SZ_64K)
  93
  94 #define KVM_ARM_VCPU_POWER_OFF          0 /* CPU is started in OFF state */
  95 #define KVM_ARM_VCPU_PSCI_0_2           1 /* CPU uses PSCI v0.2 */
  96
  97 struct kvm_vcpu_init {
  98         __u32 target;
  99         __u32 features[7];
 100 };
 101
 102 struct kvm_sregs {
 103 };
 104
 105 struct kvm_fpu {
 106 };
 107
 108 struct kvm_guest_debug_arch {
 109 };
 110
 111 struct kvm_debug_exit_arch {
 112 };
 113
 114 struct kvm_sync_regs {
 115 };
 116
 117 struct kvm_arch_memory_slot {
 118 };
 119
 120 /* If you need to interpret the index values, here is the key: */
 121 #define KVM_REG_ARM_COPROC_MASK         0x000000000FFF0000
 122 #define KVM_REG_ARM_COPROC_SHIFT        16
 123 #define KVM_REG_ARM_32_OPC2_MASK        0x0000000000000007
 124 #define KVM_REG_ARM_32_OPC2_SHIFT       0
 125 #define KVM_REG_ARM_OPC1_MASK           0x0000000000000078
 126 #define KVM_REG_ARM_OPC1_SHIFT          3
 127 #define KVM_REG_ARM_CRM_MASK            0x0000000000000780
 128 #define KVM_REG_ARM_CRM_SHIFT           7
 129 #define KVM_REG_ARM_32_CRN_MASK         0x0000000000007800
 130 #define KVM_REG_ARM_32_CRN_SHIFT        11
 131
 132 #define ARM_CP15_REG_SHIFT_MASK(x,n) \
 133         (((x) << KVM_REG_ARM_ ## n ## _SHIFT) & KVM_REG_ARM_ ## n ## _MASK)
 134
 135 #define __ARM_CP15_REG(op1,crn,crm,op2) \
 136         (KVM_REG_ARM | (15 << KVM_REG_ARM_COPROC_SHIFT) | \
 137         ARM_CP15_REG_SHIFT_MASK(op1, OPC1) | \
 138         ARM_CP15_REG_SHIFT_MASK(crn, 32_CRN) | \
 139         ARM_CP15_REG_SHIFT_MASK(crm, CRM) | \
 140         ARM_CP15_REG_SHIFT_MASK(op2, 32_OPC2))
 141
 142 #define ARM_CP15_REG32(...) (__ARM_CP15_REG(__VA_ARGS__) | KVM_REG_SIZE_U32)
 143
 144 #define __ARM_CP15_REG64(op1,crm) \
 145         (__ARM_CP15_REG(op1, 0, crm, 0) | KVM_REG_SIZE_U64)
 146 #define ARM_CP15_REG64(...) __ARM_CP15_REG64(__VA_ARGS__)
 147
 148 #define KVM_REG_ARM_TIMER_CTL           ARM_CP15_REG32(0, 14, 3, 1)
 149 #define KVM_REG_ARM_TIMER_CNT           ARM_CP15_REG64(1, 14)
 150 #define KVM_REG_ARM_TIMER_CVAL          ARM_CP15_REG64(3, 14)
 151
 152 /* Normal registers are mapped as coprocessor 16. */
 153 #define KVM_REG_ARM_CORE                (0x0010 << KVM_REG_ARM_COPROC_SHIFT)
 154 #define KVM_REG_ARM_CORE_REG(name)      (offsetof(struct kvm_regs, name) / 4)
 155
 156 /* Some registers need more space to represent values. */
 157 #define KVM_REG_ARM_DEMUX               (0x0011 << KVM_REG_ARM_COPROC_SHIFT)
 158 #define KVM_REG_ARM_DEMUX_ID_MASK       0x000000000000FF00
 159 #define KVM_REG_ARM_DEMUX_ID_SHIFT      8
 160 #define KVM_REG_ARM_DEMUX_ID_CCSIDR     (0x00 << KVM_REG_ARM_DEMUX_ID_SHIFT)
 161 #define KVM_REG_ARM_DEMUX_VAL_MASK      0x00000000000000FF
 162 #define KVM_REG_ARM_DEMUX_VAL_SHIFT     0
 163
 164 /* VFP registers: we could overload CP10 like ARM does, but that's ugly. */
 165 #define KVM_REG_ARM_VFP                 (0x0012 << KVM_REG_ARM_COPROC_SHIFT)
 166 #define KVM_REG_ARM_VFP_MASK            0x000000000000FFFF
 167 #define KVM_REG_ARM_VFP_BASE_REG        0x0
 168 #define KVM_REG_ARM_VFP_FPSID           0x1000
 169 #define KVM_REG_ARM_VFP_FPSCR           0x1001
 170 #define KVM_REG_ARM_VFP_MVFR1           0x1006
 171 #define KVM_REG_ARM_VFP_MVFR0           0x1007
 172 #define KVM_REG_ARM_VFP_FPEXC           0x1008
 173 #define KVM_REG_ARM_VFP_FPINST          0x1009
 174 #define KVM_REG_ARM_VFP_FPINST2         0x100A
 175
 176 /* Device Control API: ARM VGIC */
 177 #define KVM_DEV_ARM_VGIC_GRP_ADDR       0
 178 #define KVM_DEV_ARM_VGIC_GRP_DIST_REGS  1
 179 #define KVM_DEV_ARM_VGIC_GRP_CPU_REGS   2
 180 #define   KVM_DEV_ARM_VGIC_CPUID_SHIFT  32
 181 #define   KVM_DEV_ARM_VGIC_CPUID_MASK   (0xffULL << KVM_DEV_ARM_VGIC_CPUID_SHIFT)
 182 #define   KVM_DEV_ARM_VGIC_OFFSET_SHIFT 0
 183 #define   KVM_DEV_ARM_VGIC_OFFSET_MASK  (0xffffffffULL << KVM_DEV_ARM_VGIC_OFFSET_SHIFT)
 184 #define KVM_DEV_ARM_VGIC_GRP_NR_IRQS    3
 185 #define KVM_DEV_ARM_VGIC_GRP_CTRL       4
 186 #define   KVM_DEV_ARM_VGIC_CTRL_INIT    0
 187
 188 /* KVM_IRQ_LINE irq field index values */
 189 #define KVM_ARM_IRQ_TYPE_SHIFT          24
 190 #define KVM_ARM_IRQ_TYPE_MASK           0xff
 191 #define KVM_ARM_IRQ_VCPU_SHIFT          16
 192 #define KVM_ARM_IRQ_VCPU_MASK           0xff
 193 #define KVM_ARM_IRQ_NUM_SHIFT           0
 194 #define KVM_ARM_IRQ_NUM_MASK            0xffff
 195
 196 /* irq_type field */
 197 #define KVM_ARM_IRQ_TYPE_CPU            0
 198 #define KVM_ARM_IRQ_TYPE_SPI            1
 199 #define KVM_ARM_IRQ_TYPE_PPI            2
 200
 201 /* out-of-kernel GIC cpu interrupt injection irq_number field */
 202 #define KVM_ARM_IRQ_CPU_IRQ             0
 203 #define KVM_ARM_IRQ_CPU_FIQ             1
 204
 205 /*
 206  * This used to hold the highest supported SPI, but it is now obsolete
 207  * and only here to provide source code level compatibility with older
 208  * userland. The highest SPI number can be set via KVM_DEV_ARM_VGIC_GRP_NR_IRQS.
 209  */
 210 #define KVM_ARM_IRQ_GIC_MAX             127
 211
 212 /* One single KVM irqchip, ie. the VGIC */
 213 #define KVM_NR_IRQCHIPS          1
 214
 215 /* PSCI interface */
 216 #define KVM_PSCI_FN_BASE                0x95c1ba5e
 217 #define KVM_PSCI_FN(n)                  (KVM_PSCI_FN_BASE + (n))
 218
 219 #define KVM_PSCI_FN_CPU_SUSPEND         KVM_PSCI_FN(0)
 220 #define KVM_PSCI_FN_CPU_OFF             KVM_PSCI_FN(1)
 221 #define KVM_PSCI_FN_CPU_ON              KVM_PSCI_FN(2)
 222 #define KVM_PSCI_FN_MIGRATE             KVM_PSCI_FN(3)
 223
 224 #define KVM_PSCI_RET_SUCCESS            PSCI_RET_SUCCESS
 225 #define KVM_PSCI_RET_NI                 PSCI_RET_NOT_SUPPORTED
 226 #define KVM_PSCI_RET_INVAL              PSCI_RET_INVALID_PARAMS
 227 #define KVM_PSCI_RET_DENIED             PSCI_RET_DENIED
 228
 229 #endif /* __ARM_KVM_H__ */