Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012,2013 - ARM Ltd |
| 3 | * Author: Marc Zyngier <marc.zyngier@arm.com> |
| 4 | * |
| 5 | * Derived from arch/arm/include/kvm_emulate.h |
| 6 | * Copyright (C) 2012 - Virtual Open Systems and Columbia University |
| 7 | * Author: Christoffer Dall <c.dall@virtualopensystems.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 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 |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | */ |
| 21 | |
| 22 | #ifndef __ARM64_KVM_EMULATE_H__ |
| 23 | #define __ARM64_KVM_EMULATE_H__ |
| 24 | |
| 25 | #include <linux/kvm_host.h> |
Mark Rutland | c6d01a9 | 2014-11-24 13:59:30 +0000 | [diff] [blame] | 26 | |
| 27 | #include <asm/esr.h> |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 28 | #include <asm/kvm_arm.h> |
Mark Rutland | c6d01a9 | 2014-11-24 13:59:30 +0000 | [diff] [blame] | 29 | #include <asm/kvm_asm.h> |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 30 | #include <asm/kvm_mmio.h> |
| 31 | #include <asm/ptrace.h> |
Andre Przywara | 4429fc6 | 2014-06-02 15:37:13 +0200 | [diff] [blame] | 32 | #include <asm/cputype.h> |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 33 | |
Marc Zyngier | b547631 | 2013-02-06 19:40:29 +0000 | [diff] [blame] | 34 | unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num); |
| 35 | unsigned long *vcpu_spsr32(const struct kvm_vcpu *vcpu); |
| 36 | |
Marc Zyngier | 27b190b | 2013-02-06 19:54:04 +0000 | [diff] [blame] | 37 | bool kvm_condition_valid32(const struct kvm_vcpu *vcpu); |
| 38 | void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr); |
| 39 | |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 40 | void kvm_inject_undefined(struct kvm_vcpu *vcpu); |
| 41 | void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr); |
| 42 | void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr); |
| 43 | |
Christoffer Dall | b856a59 | 2014-10-16 17:21:16 +0200 | [diff] [blame] | 44 | static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu) |
| 45 | { |
| 46 | vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS; |
Marc Zyngier | 801f677 | 2015-01-11 14:10:11 +0100 | [diff] [blame] | 47 | if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features)) |
| 48 | vcpu->arch.hcr_el2 &= ~HCR_RW; |
Christoffer Dall | b856a59 | 2014-10-16 17:21:16 +0200 | [diff] [blame] | 49 | } |
| 50 | |
Marc Zyngier | 3c1e716 | 2014-12-19 16:05:31 +0000 | [diff] [blame] | 51 | static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu) |
| 52 | { |
| 53 | return vcpu->arch.hcr_el2; |
| 54 | } |
| 55 | |
| 56 | static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr) |
| 57 | { |
| 58 | vcpu->arch.hcr_el2 = hcr; |
| 59 | } |
| 60 | |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 61 | static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu) |
| 62 | { |
| 63 | return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc; |
| 64 | } |
| 65 | |
| 66 | static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu) |
| 67 | { |
| 68 | return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1; |
| 69 | } |
| 70 | |
| 71 | static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu) |
| 72 | { |
| 73 | return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate; |
| 74 | } |
| 75 | |
| 76 | static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu) |
| 77 | { |
Marc Zyngier | b547631 | 2013-02-06 19:40:29 +0000 | [diff] [blame] | 78 | return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT); |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu) |
| 82 | { |
Marc Zyngier | 27b190b | 2013-02-06 19:54:04 +0000 | [diff] [blame] | 83 | if (vcpu_mode_is_32bit(vcpu)) |
| 84 | return kvm_condition_valid32(vcpu); |
| 85 | |
| 86 | return true; |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 87 | } |
| 88 | |
| 89 | static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr) |
| 90 | { |
Marc Zyngier | 27b190b | 2013-02-06 19:54:04 +0000 | [diff] [blame] | 91 | if (vcpu_mode_is_32bit(vcpu)) |
| 92 | kvm_skip_instr32(vcpu, is_wide_instr); |
| 93 | else |
| 94 | *vcpu_pc(vcpu) += 4; |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu) |
| 98 | { |
Marc Zyngier | b547631 | 2013-02-06 19:40:29 +0000 | [diff] [blame] | 99 | *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT; |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 100 | } |
| 101 | |
Marc Zyngier | c0f0963 | 2015-11-16 10:28:17 +0000 | [diff] [blame] | 102 | /* |
| 103 | * vcpu_reg should always be passed a register number coming from a |
| 104 | * read of ESR_EL2. Otherwise, it may give the wrong result on AArch32 |
| 105 | * with banked registers. |
| 106 | */ |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 107 | static inline unsigned long *vcpu_reg(const struct kvm_vcpu *vcpu, u8 reg_num) |
| 108 | { |
| 109 | return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.regs[reg_num]; |
| 110 | } |
| 111 | |
| 112 | /* Get vcpu SPSR for current mode */ |
| 113 | static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu) |
| 114 | { |
Marc Zyngier | b547631 | 2013-02-06 19:40:29 +0000 | [diff] [blame] | 115 | if (vcpu_mode_is_32bit(vcpu)) |
| 116 | return vcpu_spsr32(vcpu); |
| 117 | |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 118 | return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1]; |
| 119 | } |
| 120 | |
| 121 | static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu) |
| 122 | { |
| 123 | u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK; |
| 124 | |
Marc Zyngier | b547631 | 2013-02-06 19:40:29 +0000 | [diff] [blame] | 125 | if (vcpu_mode_is_32bit(vcpu)) |
| 126 | return mode > COMPAT_PSR_MODE_USR; |
| 127 | |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 128 | return mode != PSR_MODE_EL0t; |
| 129 | } |
| 130 | |
| 131 | static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu) |
| 132 | { |
| 133 | return vcpu->arch.fault.esr_el2; |
| 134 | } |
| 135 | |
| 136 | static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu) |
| 137 | { |
| 138 | return vcpu->arch.fault.far_el2; |
| 139 | } |
| 140 | |
| 141 | static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu) |
| 142 | { |
| 143 | return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8; |
| 144 | } |
| 145 | |
Wei Huang | 0d97f884 | 2015-01-12 11:53:36 -0500 | [diff] [blame] | 146 | static inline u32 kvm_vcpu_hvc_get_imm(const struct kvm_vcpu *vcpu) |
| 147 | { |
Paolo Bonzini | 1c6007d | 2015-01-23 13:39:51 +0100 | [diff] [blame] | 148 | return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_xVC_IMM_MASK; |
Wei Huang | 0d97f884 | 2015-01-12 11:53:36 -0500 | [diff] [blame] | 149 | } |
| 150 | |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 151 | static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu) |
| 152 | { |
Mark Rutland | c6d01a9 | 2014-11-24 13:59:30 +0000 | [diff] [blame] | 153 | return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_ISV); |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu) |
| 157 | { |
Mark Rutland | c6d01a9 | 2014-11-24 13:59:30 +0000 | [diff] [blame] | 158 | return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WNR); |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 159 | } |
| 160 | |
| 161 | static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu) |
| 162 | { |
Mark Rutland | c6d01a9 | 2014-11-24 13:59:30 +0000 | [diff] [blame] | 163 | return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SSE); |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 164 | } |
| 165 | |
| 166 | static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu) |
| 167 | { |
Mark Rutland | c6d01a9 | 2014-11-24 13:59:30 +0000 | [diff] [blame] | 168 | return (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SRT_MASK) >> ESR_ELx_SRT_SHIFT; |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 169 | } |
| 170 | |
| 171 | static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu) |
| 172 | { |
Mark Rutland | c6d01a9 | 2014-11-24 13:59:30 +0000 | [diff] [blame] | 173 | return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_EA); |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu) |
| 177 | { |
Mark Rutland | c6d01a9 | 2014-11-24 13:59:30 +0000 | [diff] [blame] | 178 | return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_S1PTW); |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu) |
| 182 | { |
Mark Rutland | c6d01a9 | 2014-11-24 13:59:30 +0000 | [diff] [blame] | 183 | return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SAS) >> ESR_ELx_SAS_SHIFT); |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | /* This one is not specific to Data Abort */ |
| 187 | static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu) |
| 188 | { |
Mark Rutland | c6d01a9 | 2014-11-24 13:59:30 +0000 | [diff] [blame] | 189 | return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_IL); |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu) |
| 193 | { |
Mark Rutland | c6d01a9 | 2014-11-24 13:59:30 +0000 | [diff] [blame] | 194 | return kvm_vcpu_get_hsr(vcpu) >> ESR_ELx_EC_SHIFT; |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu) |
| 198 | { |
Mark Rutland | c6d01a9 | 2014-11-24 13:59:30 +0000 | [diff] [blame] | 199 | return kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_IABT_LOW; |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu) |
| 203 | { |
Mark Rutland | c6d01a9 | 2014-11-24 13:59:30 +0000 | [diff] [blame] | 204 | return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC; |
Christoffer Dall | 0496daa5 | 2014-09-26 12:29:34 +0200 | [diff] [blame] | 205 | } |
| 206 | |
| 207 | static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu) |
| 208 | { |
Mark Rutland | c6d01a9 | 2014-11-24 13:59:30 +0000 | [diff] [blame] | 209 | return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC_TYPE; |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 210 | } |
| 211 | |
Andre Przywara | 4429fc6 | 2014-06-02 15:37:13 +0200 | [diff] [blame] | 212 | static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu) |
Marc Zyngier | 79c6488 | 2013-10-18 18:19:03 +0100 | [diff] [blame] | 213 | { |
Andre Przywara | 4429fc6 | 2014-06-02 15:37:13 +0200 | [diff] [blame] | 214 | return vcpu_sys_reg(vcpu, MPIDR_EL1) & MPIDR_HWID_BITMASK; |
Marc Zyngier | 79c6488 | 2013-10-18 18:19:03 +0100 | [diff] [blame] | 215 | } |
| 216 | |
Marc Zyngier | ce94fe9 | 2013-11-05 14:12:15 +0000 | [diff] [blame] | 217 | static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu) |
| 218 | { |
| 219 | if (vcpu_mode_is_32bit(vcpu)) |
| 220 | *vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT; |
| 221 | else |
| 222 | vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25); |
| 223 | } |
| 224 | |
Marc Zyngier | 6d89d2d | 2013-02-12 12:40:22 +0000 | [diff] [blame] | 225 | static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu) |
| 226 | { |
| 227 | if (vcpu_mode_is_32bit(vcpu)) |
| 228 | return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT); |
| 229 | |
| 230 | return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25)); |
| 231 | } |
| 232 | |
| 233 | static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu, |
| 234 | unsigned long data, |
| 235 | unsigned int len) |
| 236 | { |
| 237 | if (kvm_vcpu_is_be(vcpu)) { |
| 238 | switch (len) { |
| 239 | case 1: |
| 240 | return data & 0xff; |
| 241 | case 2: |
| 242 | return be16_to_cpu(data & 0xffff); |
| 243 | case 4: |
| 244 | return be32_to_cpu(data & 0xffffffff); |
| 245 | default: |
| 246 | return be64_to_cpu(data); |
| 247 | } |
Victor Kamensky | b300708 | 2014-06-12 09:30:08 -0700 | [diff] [blame] | 248 | } else { |
| 249 | switch (len) { |
| 250 | case 1: |
| 251 | return data & 0xff; |
| 252 | case 2: |
| 253 | return le16_to_cpu(data & 0xffff); |
| 254 | case 4: |
| 255 | return le32_to_cpu(data & 0xffffffff); |
| 256 | default: |
| 257 | return le64_to_cpu(data); |
| 258 | } |
Marc Zyngier | 6d89d2d | 2013-02-12 12:40:22 +0000 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | return data; /* Leave LE untouched */ |
| 262 | } |
| 263 | |
| 264 | static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu, |
| 265 | unsigned long data, |
| 266 | unsigned int len) |
| 267 | { |
| 268 | if (kvm_vcpu_is_be(vcpu)) { |
| 269 | switch (len) { |
| 270 | case 1: |
| 271 | return data & 0xff; |
| 272 | case 2: |
| 273 | return cpu_to_be16(data & 0xffff); |
| 274 | case 4: |
| 275 | return cpu_to_be32(data & 0xffffffff); |
| 276 | default: |
| 277 | return cpu_to_be64(data); |
| 278 | } |
Victor Kamensky | b300708 | 2014-06-12 09:30:08 -0700 | [diff] [blame] | 279 | } else { |
| 280 | switch (len) { |
| 281 | case 1: |
| 282 | return data & 0xff; |
| 283 | case 2: |
| 284 | return cpu_to_le16(data & 0xffff); |
| 285 | case 4: |
| 286 | return cpu_to_le32(data & 0xffffffff); |
| 287 | default: |
| 288 | return cpu_to_le64(data); |
| 289 | } |
Marc Zyngier | 6d89d2d | 2013-02-12 12:40:22 +0000 | [diff] [blame] | 290 | } |
| 291 | |
| 292 | return data; /* Leave LE untouched */ |
| 293 | } |
| 294 | |
Marc Zyngier | 83a4979 | 2012-12-10 13:27:52 +0000 | [diff] [blame] | 295 | #endif /* __ARM64_KVM_EMULATE_H__ */ |