183a49794SMarc Zyngier /* 283a49794SMarc Zyngier * Copyright (C) 2012,2013 - ARM Ltd 383a49794SMarc Zyngier * Author: Marc Zyngier <marc.zyngier@arm.com> 483a49794SMarc Zyngier * 583a49794SMarc Zyngier * Derived from arch/arm/include/kvm_emulate.h 683a49794SMarc Zyngier * Copyright (C) 2012 - Virtual Open Systems and Columbia University 783a49794SMarc Zyngier * Author: Christoffer Dall <c.dall@virtualopensystems.com> 883a49794SMarc Zyngier * 983a49794SMarc Zyngier * This program is free software; you can redistribute it and/or modify 1083a49794SMarc Zyngier * it under the terms of the GNU General Public License version 2 as 1183a49794SMarc Zyngier * published by the Free Software Foundation. 1283a49794SMarc Zyngier * 1383a49794SMarc Zyngier * This program is distributed in the hope that it will be useful, 1483a49794SMarc Zyngier * but WITHOUT ANY WARRANTY; without even the implied warranty of 1583a49794SMarc Zyngier * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1683a49794SMarc Zyngier * GNU General Public License for more details. 1783a49794SMarc Zyngier * 1883a49794SMarc Zyngier * You should have received a copy of the GNU General Public License 1983a49794SMarc Zyngier * along with this program. If not, see <http://www.gnu.org/licenses/>. 2083a49794SMarc Zyngier */ 2183a49794SMarc Zyngier 2283a49794SMarc Zyngier #ifndef __ARM64_KVM_EMULATE_H__ 2383a49794SMarc Zyngier #define __ARM64_KVM_EMULATE_H__ 2483a49794SMarc Zyngier 2583a49794SMarc Zyngier #include <linux/kvm_host.h> 26c6d01a94SMark Rutland 27bd7d95caSMark Rutland #include <asm/debug-monitors.h> 28c6d01a94SMark Rutland #include <asm/esr.h> 2983a49794SMarc Zyngier #include <asm/kvm_arm.h> 3000536ec4SChristoffer Dall #include <asm/kvm_hyp.h> 3183a49794SMarc Zyngier #include <asm/kvm_mmio.h> 3283a49794SMarc Zyngier #include <asm/ptrace.h> 334429fc64SAndre Przywara #include <asm/cputype.h> 3468908bf7SMarc Zyngier #include <asm/virt.h> 3583a49794SMarc Zyngier 36b547631fSMarc Zyngier unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num); 37a8928195SChristoffer Dall unsigned long vcpu_read_spsr32(const struct kvm_vcpu *vcpu); 38a8928195SChristoffer Dall void vcpu_write_spsr32(struct kvm_vcpu *vcpu, unsigned long v); 39b547631fSMarc Zyngier 4027b190bdSMarc Zyngier bool kvm_condition_valid32(const struct kvm_vcpu *vcpu); 4127b190bdSMarc Zyngier void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr); 4227b190bdSMarc Zyngier 4383a49794SMarc Zyngier void kvm_inject_undefined(struct kvm_vcpu *vcpu); 4410cf3390SMarc Zyngier void kvm_inject_vabt(struct kvm_vcpu *vcpu); 4583a49794SMarc Zyngier void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr); 4683a49794SMarc Zyngier void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr); 4774a64a98SMarc Zyngier void kvm_inject_undef32(struct kvm_vcpu *vcpu); 4874a64a98SMarc Zyngier void kvm_inject_dabt32(struct kvm_vcpu *vcpu, unsigned long addr); 4974a64a98SMarc Zyngier void kvm_inject_pabt32(struct kvm_vcpu *vcpu, unsigned long addr); 5083a49794SMarc Zyngier 51e72341c5SChristoffer Dall static inline bool vcpu_el1_is_32bit(struct kvm_vcpu *vcpu) 52e72341c5SChristoffer Dall { 53e72341c5SChristoffer Dall return !(vcpu->arch.hcr_el2 & HCR_RW); 54e72341c5SChristoffer Dall } 55e72341c5SChristoffer Dall 56b856a591SChristoffer Dall static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu) 57b856a591SChristoffer Dall { 58b856a591SChristoffer Dall vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS; 5968908bf7SMarc Zyngier if (is_kernel_in_hyp_mode()) 6068908bf7SMarc Zyngier vcpu->arch.hcr_el2 |= HCR_E2H; 61558daf69SDongjiu Geng if (cpus_have_const_cap(ARM64_HAS_RAS_EXTN)) { 62558daf69SDongjiu Geng /* route synchronous external abort exceptions to EL2 */ 63558daf69SDongjiu Geng vcpu->arch.hcr_el2 |= HCR_TEA; 64558daf69SDongjiu Geng /* trap error record accesses */ 65558daf69SDongjiu Geng vcpu->arch.hcr_el2 |= HCR_TERR; 66558daf69SDongjiu Geng } 67e48d53a9SMarc Zyngier if (cpus_have_const_cap(ARM64_HAS_STAGE2_FWB)) 68e48d53a9SMarc Zyngier vcpu->arch.hcr_el2 |= HCR_FWB; 69558daf69SDongjiu Geng 70801f6772SMarc Zyngier if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features)) 71801f6772SMarc Zyngier vcpu->arch.hcr_el2 &= ~HCR_RW; 72005781beSDave Martin 73005781beSDave Martin /* 74005781beSDave Martin * TID3: trap feature register accesses that we virtualise. 75005781beSDave Martin * For now this is conditional, since no AArch32 feature regs 76005781beSDave Martin * are currently virtualised. 77005781beSDave Martin */ 78e72341c5SChristoffer Dall if (!vcpu_el1_is_32bit(vcpu)) 79005781beSDave Martin vcpu->arch.hcr_el2 |= HCR_TID3; 80b856a591SChristoffer Dall } 81b856a591SChristoffer Dall 823df59d8dSChristoffer Dall static inline unsigned long *vcpu_hcr(struct kvm_vcpu *vcpu) 833c1e7165SMarc Zyngier { 843df59d8dSChristoffer Dall return (unsigned long *)&vcpu->arch.hcr_el2; 853c1e7165SMarc Zyngier } 863c1e7165SMarc Zyngier 87de737089SMarc Zyngier static inline void vcpu_clear_wfe_traps(struct kvm_vcpu *vcpu) 88de737089SMarc Zyngier { 89de737089SMarc Zyngier vcpu->arch.hcr_el2 &= ~HCR_TWE; 90de737089SMarc Zyngier } 91de737089SMarc Zyngier 92de737089SMarc Zyngier static inline void vcpu_set_wfe_traps(struct kvm_vcpu *vcpu) 93de737089SMarc Zyngier { 94de737089SMarc Zyngier vcpu->arch.hcr_el2 |= HCR_TWE; 95de737089SMarc Zyngier } 96de737089SMarc Zyngier 97b7b27facSDongjiu Geng static inline unsigned long vcpu_get_vsesr(struct kvm_vcpu *vcpu) 98b7b27facSDongjiu Geng { 99b7b27facSDongjiu Geng return vcpu->arch.vsesr_el2; 100b7b27facSDongjiu Geng } 101b7b27facSDongjiu Geng 1024715c14bSJames Morse static inline void vcpu_set_vsesr(struct kvm_vcpu *vcpu, u64 vsesr) 1034715c14bSJames Morse { 1044715c14bSJames Morse vcpu->arch.vsesr_el2 = vsesr; 1054715c14bSJames Morse } 1064715c14bSJames Morse 10783a49794SMarc Zyngier static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu) 10883a49794SMarc Zyngier { 10983a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc; 11083a49794SMarc Zyngier } 11183a49794SMarc Zyngier 1126d4bd909SChristoffer Dall static inline unsigned long *__vcpu_elr_el1(const struct kvm_vcpu *vcpu) 11383a49794SMarc Zyngier { 11483a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1; 11583a49794SMarc Zyngier } 11683a49794SMarc Zyngier 1176d4bd909SChristoffer Dall static inline unsigned long vcpu_read_elr_el1(const struct kvm_vcpu *vcpu) 1186d4bd909SChristoffer Dall { 1196d4bd909SChristoffer Dall if (vcpu->arch.sysregs_loaded_on_cpu) 1206d4bd909SChristoffer Dall return read_sysreg_el1(elr); 1216d4bd909SChristoffer Dall else 1226d4bd909SChristoffer Dall return *__vcpu_elr_el1(vcpu); 1236d4bd909SChristoffer Dall } 1246d4bd909SChristoffer Dall 1256d4bd909SChristoffer Dall static inline void vcpu_write_elr_el1(const struct kvm_vcpu *vcpu, unsigned long v) 1266d4bd909SChristoffer Dall { 1276d4bd909SChristoffer Dall if (vcpu->arch.sysregs_loaded_on_cpu) 1286d4bd909SChristoffer Dall write_sysreg_el1(v, elr); 1296d4bd909SChristoffer Dall else 1306d4bd909SChristoffer Dall *__vcpu_elr_el1(vcpu) = v; 1316d4bd909SChristoffer Dall } 1326d4bd909SChristoffer Dall 13383a49794SMarc Zyngier static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu) 13483a49794SMarc Zyngier { 13583a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate; 13683a49794SMarc Zyngier } 13783a49794SMarc Zyngier 13883a49794SMarc Zyngier static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu) 13983a49794SMarc Zyngier { 140b547631fSMarc Zyngier return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT); 14183a49794SMarc Zyngier } 14283a49794SMarc Zyngier 14383a49794SMarc Zyngier static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu) 14483a49794SMarc Zyngier { 14527b190bdSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 14627b190bdSMarc Zyngier return kvm_condition_valid32(vcpu); 14727b190bdSMarc Zyngier 14827b190bdSMarc Zyngier return true; 14983a49794SMarc Zyngier } 15083a49794SMarc Zyngier 15183a49794SMarc Zyngier static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu) 15283a49794SMarc Zyngier { 153256c0960SMark Rutland *vcpu_cpsr(vcpu) |= PSR_AA32_T_BIT; 15483a49794SMarc Zyngier } 15583a49794SMarc Zyngier 156c0f09634SMarc Zyngier /* 157f6be563aSPavel Fedin * vcpu_get_reg and vcpu_set_reg should always be passed a register number 158f6be563aSPavel Fedin * coming from a read of ESR_EL2. Otherwise, it may give the wrong result on 159f6be563aSPavel Fedin * AArch32 with banked registers. 160c0f09634SMarc Zyngier */ 161bc45a516SPavel Fedin static inline unsigned long vcpu_get_reg(const struct kvm_vcpu *vcpu, 162bc45a516SPavel Fedin u8 reg_num) 163bc45a516SPavel Fedin { 164bc45a516SPavel Fedin return (reg_num == 31) ? 0 : vcpu_gp_regs(vcpu)->regs.regs[reg_num]; 165bc45a516SPavel Fedin } 166bc45a516SPavel Fedin 167bc45a516SPavel Fedin static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num, 168bc45a516SPavel Fedin unsigned long val) 169bc45a516SPavel Fedin { 170bc45a516SPavel Fedin if (reg_num != 31) 171bc45a516SPavel Fedin vcpu_gp_regs(vcpu)->regs.regs[reg_num] = val; 172bc45a516SPavel Fedin } 173bc45a516SPavel Fedin 17400536ec4SChristoffer Dall static inline unsigned long vcpu_read_spsr(const struct kvm_vcpu *vcpu) 17583a49794SMarc Zyngier { 176a8928195SChristoffer Dall if (vcpu_mode_is_32bit(vcpu)) 177a8928195SChristoffer Dall return vcpu_read_spsr32(vcpu); 17800536ec4SChristoffer Dall 17900536ec4SChristoffer Dall if (vcpu->arch.sysregs_loaded_on_cpu) 18000536ec4SChristoffer Dall return read_sysreg_el1(spsr); 18100536ec4SChristoffer Dall else 182a8928195SChristoffer Dall return vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1]; 18300536ec4SChristoffer Dall } 18400536ec4SChristoffer Dall 185a8928195SChristoffer Dall static inline void vcpu_write_spsr(struct kvm_vcpu *vcpu, unsigned long v) 18600536ec4SChristoffer Dall { 18700536ec4SChristoffer Dall if (vcpu_mode_is_32bit(vcpu)) { 188a8928195SChristoffer Dall vcpu_write_spsr32(vcpu, v); 18900536ec4SChristoffer Dall return; 19000536ec4SChristoffer Dall } 19100536ec4SChristoffer Dall 19200536ec4SChristoffer Dall if (vcpu->arch.sysregs_loaded_on_cpu) 19300536ec4SChristoffer Dall write_sysreg_el1(v, spsr); 19400536ec4SChristoffer Dall else 195a8928195SChristoffer Dall vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1] = v; 19683a49794SMarc Zyngier } 19783a49794SMarc Zyngier 19883a49794SMarc Zyngier static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu) 19983a49794SMarc Zyngier { 2009586a2eaSShannon Zhao u32 mode; 20183a49794SMarc Zyngier 2029586a2eaSShannon Zhao if (vcpu_mode_is_32bit(vcpu)) { 203256c0960SMark Rutland mode = *vcpu_cpsr(vcpu) & PSR_AA32_MODE_MASK; 204256c0960SMark Rutland return mode > PSR_AA32_MODE_USR; 2059586a2eaSShannon Zhao } 2069586a2eaSShannon Zhao 2079586a2eaSShannon Zhao mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK; 208b547631fSMarc Zyngier 20983a49794SMarc Zyngier return mode != PSR_MODE_EL0t; 21083a49794SMarc Zyngier } 21183a49794SMarc Zyngier 21283a49794SMarc Zyngier static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu) 21383a49794SMarc Zyngier { 21483a49794SMarc Zyngier return vcpu->arch.fault.esr_el2; 21583a49794SMarc Zyngier } 21683a49794SMarc Zyngier 2173e51d435SMarc Zyngier static inline int kvm_vcpu_get_condition(const struct kvm_vcpu *vcpu) 2183e51d435SMarc Zyngier { 2193e51d435SMarc Zyngier u32 esr = kvm_vcpu_get_hsr(vcpu); 2203e51d435SMarc Zyngier 2213e51d435SMarc Zyngier if (esr & ESR_ELx_CV) 2223e51d435SMarc Zyngier return (esr & ESR_ELx_COND_MASK) >> ESR_ELx_COND_SHIFT; 2233e51d435SMarc Zyngier 2243e51d435SMarc Zyngier return -1; 2253e51d435SMarc Zyngier } 2263e51d435SMarc Zyngier 22783a49794SMarc Zyngier static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu) 22883a49794SMarc Zyngier { 22983a49794SMarc Zyngier return vcpu->arch.fault.far_el2; 23083a49794SMarc Zyngier } 23183a49794SMarc Zyngier 23283a49794SMarc Zyngier static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu) 23383a49794SMarc Zyngier { 23483a49794SMarc Zyngier return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8; 23583a49794SMarc Zyngier } 23683a49794SMarc Zyngier 2370067df41SJames Morse static inline u64 kvm_vcpu_get_disr(const struct kvm_vcpu *vcpu) 2380067df41SJames Morse { 2390067df41SJames Morse return vcpu->arch.fault.disr_el1; 2400067df41SJames Morse } 2410067df41SJames Morse 2420d97f884SWei Huang static inline u32 kvm_vcpu_hvc_get_imm(const struct kvm_vcpu *vcpu) 2430d97f884SWei Huang { 2441c6007d5SPaolo Bonzini return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_xVC_IMM_MASK; 2450d97f884SWei Huang } 2460d97f884SWei Huang 24783a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu) 24883a49794SMarc Zyngier { 249c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_ISV); 25083a49794SMarc Zyngier } 25183a49794SMarc Zyngier 25283a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu) 25383a49794SMarc Zyngier { 254c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SSE); 25583a49794SMarc Zyngier } 25683a49794SMarc Zyngier 25783a49794SMarc Zyngier static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu) 25883a49794SMarc Zyngier { 259c6d01a94SMark Rutland return (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SRT_MASK) >> ESR_ELx_SRT_SHIFT; 26083a49794SMarc Zyngier } 26183a49794SMarc Zyngier 26283a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu) 26383a49794SMarc Zyngier { 264c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_S1PTW); 26583a49794SMarc Zyngier } 26683a49794SMarc Zyngier 26760e21a0eSWill Deacon static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu) 26860e21a0eSWill Deacon { 26960e21a0eSWill Deacon return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WNR) || 27060e21a0eSWill Deacon kvm_vcpu_dabt_iss1tw(vcpu); /* AF/DBM update */ 27160e21a0eSWill Deacon } 27260e21a0eSWill Deacon 27357c841f1SMarc Zyngier static inline bool kvm_vcpu_dabt_is_cm(const struct kvm_vcpu *vcpu) 27457c841f1SMarc Zyngier { 27557c841f1SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_CM); 27657c841f1SMarc Zyngier } 27757c841f1SMarc Zyngier 27883a49794SMarc Zyngier static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu) 27983a49794SMarc Zyngier { 280c6d01a94SMark Rutland return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SAS) >> ESR_ELx_SAS_SHIFT); 28183a49794SMarc Zyngier } 28283a49794SMarc Zyngier 28383a49794SMarc Zyngier /* This one is not specific to Data Abort */ 28483a49794SMarc Zyngier static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu) 28583a49794SMarc Zyngier { 286c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_IL); 28783a49794SMarc Zyngier } 28883a49794SMarc Zyngier 28983a49794SMarc Zyngier static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu) 29083a49794SMarc Zyngier { 291561454e2SMark Rutland return ESR_ELx_EC(kvm_vcpu_get_hsr(vcpu)); 29283a49794SMarc Zyngier } 29383a49794SMarc Zyngier 29483a49794SMarc Zyngier static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu) 29583a49794SMarc Zyngier { 296c6d01a94SMark Rutland return kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_IABT_LOW; 29783a49794SMarc Zyngier } 29883a49794SMarc Zyngier 29983a49794SMarc Zyngier static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu) 30083a49794SMarc Zyngier { 301c6d01a94SMark Rutland return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC; 3020496daa5SChristoffer Dall } 3030496daa5SChristoffer Dall 3040496daa5SChristoffer Dall static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu) 3050496daa5SChristoffer Dall { 306c6d01a94SMark Rutland return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC_TYPE; 30783a49794SMarc Zyngier } 30883a49794SMarc Zyngier 309bb428921SJames Morse static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu) 310bb428921SJames Morse { 311a2b83133SDongjiu Geng switch (kvm_vcpu_trap_get_fault(vcpu)) { 312bb428921SJames Morse case FSC_SEA: 313bb428921SJames Morse case FSC_SEA_TTW0: 314bb428921SJames Morse case FSC_SEA_TTW1: 315bb428921SJames Morse case FSC_SEA_TTW2: 316bb428921SJames Morse case FSC_SEA_TTW3: 317bb428921SJames Morse case FSC_SECC: 318bb428921SJames Morse case FSC_SECC_TTW0: 319bb428921SJames Morse case FSC_SECC_TTW1: 320bb428921SJames Morse case FSC_SECC_TTW2: 321bb428921SJames Morse case FSC_SECC_TTW3: 322bb428921SJames Morse return true; 323bb428921SJames Morse default: 324bb428921SJames Morse return false; 325bb428921SJames Morse } 326bb428921SJames Morse } 327bb428921SJames Morse 328c667186fSMarc Zyngier static inline int kvm_vcpu_sys_get_rt(struct kvm_vcpu *vcpu) 329c667186fSMarc Zyngier { 330c667186fSMarc Zyngier u32 esr = kvm_vcpu_get_hsr(vcpu); 3311c839141SAnshuman Khandual return ESR_ELx_SYS64_ISS_RT(esr); 332c667186fSMarc Zyngier } 333c667186fSMarc Zyngier 33464cf98faSChristoffer Dall static inline bool kvm_is_write_fault(struct kvm_vcpu *vcpu) 33564cf98faSChristoffer Dall { 33664cf98faSChristoffer Dall if (kvm_vcpu_trap_is_iabt(vcpu)) 33764cf98faSChristoffer Dall return false; 33864cf98faSChristoffer Dall 33964cf98faSChristoffer Dall return kvm_vcpu_dabt_iswrite(vcpu); 34064cf98faSChristoffer Dall } 34164cf98faSChristoffer Dall 3424429fc64SAndre Przywara static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu) 34379c64880SMarc Zyngier { 3448d404c4cSChristoffer Dall return vcpu_read_sys_reg(vcpu, MPIDR_EL1) & MPIDR_HWID_BITMASK; 34579c64880SMarc Zyngier } 34679c64880SMarc Zyngier 347ce94fe93SMarc Zyngier static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu) 348ce94fe93SMarc Zyngier { 3498d404c4cSChristoffer Dall if (vcpu_mode_is_32bit(vcpu)) { 350256c0960SMark Rutland *vcpu_cpsr(vcpu) |= PSR_AA32_E_BIT; 3518d404c4cSChristoffer Dall } else { 3528d404c4cSChristoffer Dall u64 sctlr = vcpu_read_sys_reg(vcpu, SCTLR_EL1); 3538d404c4cSChristoffer Dall sctlr |= (1 << 25); 3541975fa56SJames Morse vcpu_write_sys_reg(vcpu, sctlr, SCTLR_EL1); 3558d404c4cSChristoffer Dall } 356ce94fe93SMarc Zyngier } 357ce94fe93SMarc Zyngier 3586d89d2d9SMarc Zyngier static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu) 3596d89d2d9SMarc Zyngier { 3606d89d2d9SMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 361256c0960SMark Rutland return !!(*vcpu_cpsr(vcpu) & PSR_AA32_E_BIT); 3626d89d2d9SMarc Zyngier 3638d404c4cSChristoffer Dall return !!(vcpu_read_sys_reg(vcpu, SCTLR_EL1) & (1 << 25)); 3646d89d2d9SMarc Zyngier } 3656d89d2d9SMarc Zyngier 3666d89d2d9SMarc Zyngier static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu, 3676d89d2d9SMarc Zyngier unsigned long data, 3686d89d2d9SMarc Zyngier unsigned int len) 3696d89d2d9SMarc Zyngier { 3706d89d2d9SMarc Zyngier if (kvm_vcpu_is_be(vcpu)) { 3716d89d2d9SMarc Zyngier switch (len) { 3726d89d2d9SMarc Zyngier case 1: 3736d89d2d9SMarc Zyngier return data & 0xff; 3746d89d2d9SMarc Zyngier case 2: 3756d89d2d9SMarc Zyngier return be16_to_cpu(data & 0xffff); 3766d89d2d9SMarc Zyngier case 4: 3776d89d2d9SMarc Zyngier return be32_to_cpu(data & 0xffffffff); 3786d89d2d9SMarc Zyngier default: 3796d89d2d9SMarc Zyngier return be64_to_cpu(data); 3806d89d2d9SMarc Zyngier } 381b3007086SVictor Kamensky } else { 382b3007086SVictor Kamensky switch (len) { 383b3007086SVictor Kamensky case 1: 384b3007086SVictor Kamensky return data & 0xff; 385b3007086SVictor Kamensky case 2: 386b3007086SVictor Kamensky return le16_to_cpu(data & 0xffff); 387b3007086SVictor Kamensky case 4: 388b3007086SVictor Kamensky return le32_to_cpu(data & 0xffffffff); 389b3007086SVictor Kamensky default: 390b3007086SVictor Kamensky return le64_to_cpu(data); 391b3007086SVictor Kamensky } 3926d89d2d9SMarc Zyngier } 3936d89d2d9SMarc Zyngier 3946d89d2d9SMarc Zyngier return data; /* Leave LE untouched */ 3956d89d2d9SMarc Zyngier } 3966d89d2d9SMarc Zyngier 3976d89d2d9SMarc Zyngier static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu, 3986d89d2d9SMarc Zyngier unsigned long data, 3996d89d2d9SMarc Zyngier unsigned int len) 4006d89d2d9SMarc Zyngier { 4016d89d2d9SMarc Zyngier if (kvm_vcpu_is_be(vcpu)) { 4026d89d2d9SMarc Zyngier switch (len) { 4036d89d2d9SMarc Zyngier case 1: 4046d89d2d9SMarc Zyngier return data & 0xff; 4056d89d2d9SMarc Zyngier case 2: 4066d89d2d9SMarc Zyngier return cpu_to_be16(data & 0xffff); 4076d89d2d9SMarc Zyngier case 4: 4086d89d2d9SMarc Zyngier return cpu_to_be32(data & 0xffffffff); 4096d89d2d9SMarc Zyngier default: 4106d89d2d9SMarc Zyngier return cpu_to_be64(data); 4116d89d2d9SMarc Zyngier } 412b3007086SVictor Kamensky } else { 413b3007086SVictor Kamensky switch (len) { 414b3007086SVictor Kamensky case 1: 415b3007086SVictor Kamensky return data & 0xff; 416b3007086SVictor Kamensky case 2: 417b3007086SVictor Kamensky return cpu_to_le16(data & 0xffff); 418b3007086SVictor Kamensky case 4: 419b3007086SVictor Kamensky return cpu_to_le32(data & 0xffffffff); 420b3007086SVictor Kamensky default: 421b3007086SVictor Kamensky return cpu_to_le64(data); 422b3007086SVictor Kamensky } 4236d89d2d9SMarc Zyngier } 4246d89d2d9SMarc Zyngier 4256d89d2d9SMarc Zyngier return data; /* Leave LE untouched */ 4266d89d2d9SMarc Zyngier } 4276d89d2d9SMarc Zyngier 428bd7d95caSMark Rutland static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr) 429bd7d95caSMark Rutland { 430bd7d95caSMark Rutland if (vcpu_mode_is_32bit(vcpu)) 431bd7d95caSMark Rutland kvm_skip_instr32(vcpu, is_wide_instr); 432bd7d95caSMark Rutland else 433bd7d95caSMark Rutland *vcpu_pc(vcpu) += 4; 434bd7d95caSMark Rutland 435bd7d95caSMark Rutland /* advance the singlestep state machine */ 436bd7d95caSMark Rutland *vcpu_cpsr(vcpu) &= ~DBG_SPSR_SS; 437bd7d95caSMark Rutland } 438bd7d95caSMark Rutland 439bd7d95caSMark Rutland /* 440bd7d95caSMark Rutland * Skip an instruction which has been emulated at hyp while most guest sysregs 441bd7d95caSMark Rutland * are live. 442bd7d95caSMark Rutland */ 443bd7d95caSMark Rutland static inline void __hyp_text __kvm_skip_instr(struct kvm_vcpu *vcpu) 444bd7d95caSMark Rutland { 445bd7d95caSMark Rutland *vcpu_pc(vcpu) = read_sysreg_el2(elr); 446bd7d95caSMark Rutland vcpu->arch.ctxt.gp_regs.regs.pstate = read_sysreg_el2(spsr); 447bd7d95caSMark Rutland 448bd7d95caSMark Rutland kvm_skip_instr(vcpu, kvm_vcpu_trap_il_is32bit(vcpu)); 449bd7d95caSMark Rutland 450bd7d95caSMark Rutland write_sysreg_el2(vcpu->arch.ctxt.gp_regs.regs.pstate, spsr); 451bd7d95caSMark Rutland write_sysreg_el2(*vcpu_pc(vcpu), elr); 452bd7d95caSMark Rutland } 453bd7d95caSMark Rutland 45483a49794SMarc Zyngier #endif /* __ARM64_KVM_EMULATE_H__ */ 455