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 27c6d01a94SMark Rutland #include <asm/esr.h> 2883a49794SMarc Zyngier #include <asm/kvm_arm.h> 2900536ec4SChristoffer Dall #include <asm/kvm_hyp.h> 3083a49794SMarc Zyngier #include <asm/kvm_mmio.h> 3183a49794SMarc Zyngier #include <asm/ptrace.h> 324429fc64SAndre Przywara #include <asm/cputype.h> 3368908bf7SMarc Zyngier #include <asm/virt.h> 3483a49794SMarc Zyngier 35b547631fSMarc Zyngier unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num); 36a8928195SChristoffer Dall unsigned long vcpu_read_spsr32(const struct kvm_vcpu *vcpu); 37a8928195SChristoffer Dall void vcpu_write_spsr32(struct kvm_vcpu *vcpu, unsigned long v); 38b547631fSMarc Zyngier 3927b190bdSMarc Zyngier bool kvm_condition_valid32(const struct kvm_vcpu *vcpu); 4027b190bdSMarc Zyngier void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr); 4127b190bdSMarc Zyngier 4283a49794SMarc Zyngier void kvm_inject_undefined(struct kvm_vcpu *vcpu); 4310cf3390SMarc Zyngier void kvm_inject_vabt(struct kvm_vcpu *vcpu); 4483a49794SMarc Zyngier void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr); 4583a49794SMarc Zyngier void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr); 4674a64a98SMarc Zyngier void kvm_inject_undef32(struct kvm_vcpu *vcpu); 4774a64a98SMarc Zyngier void kvm_inject_dabt32(struct kvm_vcpu *vcpu, unsigned long addr); 4874a64a98SMarc Zyngier void kvm_inject_pabt32(struct kvm_vcpu *vcpu, unsigned long addr); 4983a49794SMarc Zyngier 50e72341c5SChristoffer Dall static inline bool vcpu_el1_is_32bit(struct kvm_vcpu *vcpu) 51e72341c5SChristoffer Dall { 52e72341c5SChristoffer Dall return !(vcpu->arch.hcr_el2 & HCR_RW); 53e72341c5SChristoffer Dall } 54e72341c5SChristoffer Dall 55b856a591SChristoffer Dall static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu) 56b856a591SChristoffer Dall { 57b856a591SChristoffer Dall vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS; 5868908bf7SMarc Zyngier if (is_kernel_in_hyp_mode()) 5968908bf7SMarc Zyngier vcpu->arch.hcr_el2 |= HCR_E2H; 60558daf69SDongjiu Geng if (cpus_have_const_cap(ARM64_HAS_RAS_EXTN)) { 61558daf69SDongjiu Geng /* route synchronous external abort exceptions to EL2 */ 62558daf69SDongjiu Geng vcpu->arch.hcr_el2 |= HCR_TEA; 63558daf69SDongjiu Geng /* trap error record accesses */ 64558daf69SDongjiu Geng vcpu->arch.hcr_el2 |= HCR_TERR; 65558daf69SDongjiu Geng } 66e48d53a9SMarc Zyngier if (cpus_have_const_cap(ARM64_HAS_STAGE2_FWB)) 67e48d53a9SMarc Zyngier vcpu->arch.hcr_el2 |= HCR_FWB; 68558daf69SDongjiu Geng 69801f6772SMarc Zyngier if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features)) 70801f6772SMarc Zyngier vcpu->arch.hcr_el2 &= ~HCR_RW; 71005781beSDave Martin 72005781beSDave Martin /* 73005781beSDave Martin * TID3: trap feature register accesses that we virtualise. 74005781beSDave Martin * For now this is conditional, since no AArch32 feature regs 75005781beSDave Martin * are currently virtualised. 76005781beSDave Martin */ 77e72341c5SChristoffer Dall if (!vcpu_el1_is_32bit(vcpu)) 78005781beSDave Martin vcpu->arch.hcr_el2 |= HCR_TID3; 79b856a591SChristoffer Dall } 80b856a591SChristoffer Dall 813df59d8dSChristoffer Dall static inline unsigned long *vcpu_hcr(struct kvm_vcpu *vcpu) 823c1e7165SMarc Zyngier { 833df59d8dSChristoffer Dall return (unsigned long *)&vcpu->arch.hcr_el2; 843c1e7165SMarc Zyngier } 853c1e7165SMarc Zyngier 864715c14bSJames Morse static inline void vcpu_set_vsesr(struct kvm_vcpu *vcpu, u64 vsesr) 874715c14bSJames Morse { 884715c14bSJames Morse vcpu->arch.vsesr_el2 = vsesr; 894715c14bSJames Morse } 904715c14bSJames Morse 9183a49794SMarc Zyngier static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu) 9283a49794SMarc Zyngier { 9383a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc; 9483a49794SMarc Zyngier } 9583a49794SMarc Zyngier 966d4bd909SChristoffer Dall static inline unsigned long *__vcpu_elr_el1(const struct kvm_vcpu *vcpu) 9783a49794SMarc Zyngier { 9883a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1; 9983a49794SMarc Zyngier } 10083a49794SMarc Zyngier 1016d4bd909SChristoffer Dall static inline unsigned long vcpu_read_elr_el1(const struct kvm_vcpu *vcpu) 1026d4bd909SChristoffer Dall { 1036d4bd909SChristoffer Dall if (vcpu->arch.sysregs_loaded_on_cpu) 1046d4bd909SChristoffer Dall return read_sysreg_el1(elr); 1056d4bd909SChristoffer Dall else 1066d4bd909SChristoffer Dall return *__vcpu_elr_el1(vcpu); 1076d4bd909SChristoffer Dall } 1086d4bd909SChristoffer Dall 1096d4bd909SChristoffer Dall static inline void vcpu_write_elr_el1(const struct kvm_vcpu *vcpu, unsigned long v) 1106d4bd909SChristoffer Dall { 1116d4bd909SChristoffer Dall if (vcpu->arch.sysregs_loaded_on_cpu) 1126d4bd909SChristoffer Dall write_sysreg_el1(v, elr); 1136d4bd909SChristoffer Dall else 1146d4bd909SChristoffer Dall *__vcpu_elr_el1(vcpu) = v; 1156d4bd909SChristoffer Dall } 1166d4bd909SChristoffer Dall 11783a49794SMarc Zyngier static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu) 11883a49794SMarc Zyngier { 11983a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate; 12083a49794SMarc Zyngier } 12183a49794SMarc Zyngier 12283a49794SMarc Zyngier static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu) 12383a49794SMarc Zyngier { 124b547631fSMarc Zyngier return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT); 12583a49794SMarc Zyngier } 12683a49794SMarc Zyngier 12783a49794SMarc Zyngier static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu) 12883a49794SMarc Zyngier { 12927b190bdSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 13027b190bdSMarc Zyngier return kvm_condition_valid32(vcpu); 13127b190bdSMarc Zyngier 13227b190bdSMarc Zyngier return true; 13383a49794SMarc Zyngier } 13483a49794SMarc Zyngier 13583a49794SMarc Zyngier static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr) 13683a49794SMarc Zyngier { 13727b190bdSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 13827b190bdSMarc Zyngier kvm_skip_instr32(vcpu, is_wide_instr); 13927b190bdSMarc Zyngier else 14083a49794SMarc Zyngier *vcpu_pc(vcpu) += 4; 14183a49794SMarc Zyngier } 14283a49794SMarc Zyngier 14383a49794SMarc Zyngier static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu) 14483a49794SMarc Zyngier { 145b547631fSMarc Zyngier *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT; 14683a49794SMarc Zyngier } 14783a49794SMarc Zyngier 148c0f09634SMarc Zyngier /* 149f6be563aSPavel Fedin * vcpu_get_reg and vcpu_set_reg should always be passed a register number 150f6be563aSPavel Fedin * coming from a read of ESR_EL2. Otherwise, it may give the wrong result on 151f6be563aSPavel Fedin * AArch32 with banked registers. 152c0f09634SMarc Zyngier */ 153bc45a516SPavel Fedin static inline unsigned long vcpu_get_reg(const struct kvm_vcpu *vcpu, 154bc45a516SPavel Fedin u8 reg_num) 155bc45a516SPavel Fedin { 156bc45a516SPavel Fedin return (reg_num == 31) ? 0 : vcpu_gp_regs(vcpu)->regs.regs[reg_num]; 157bc45a516SPavel Fedin } 158bc45a516SPavel Fedin 159bc45a516SPavel Fedin static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num, 160bc45a516SPavel Fedin unsigned long val) 161bc45a516SPavel Fedin { 162bc45a516SPavel Fedin if (reg_num != 31) 163bc45a516SPavel Fedin vcpu_gp_regs(vcpu)->regs.regs[reg_num] = val; 164bc45a516SPavel Fedin } 165bc45a516SPavel Fedin 16600536ec4SChristoffer Dall static inline unsigned long vcpu_read_spsr(const struct kvm_vcpu *vcpu) 16783a49794SMarc Zyngier { 168a8928195SChristoffer Dall if (vcpu_mode_is_32bit(vcpu)) 169a8928195SChristoffer Dall return vcpu_read_spsr32(vcpu); 17000536ec4SChristoffer Dall 17100536ec4SChristoffer Dall if (vcpu->arch.sysregs_loaded_on_cpu) 17200536ec4SChristoffer Dall return read_sysreg_el1(spsr); 17300536ec4SChristoffer Dall else 174a8928195SChristoffer Dall return vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1]; 17500536ec4SChristoffer Dall } 17600536ec4SChristoffer Dall 177a8928195SChristoffer Dall static inline void vcpu_write_spsr(struct kvm_vcpu *vcpu, unsigned long v) 17800536ec4SChristoffer Dall { 17900536ec4SChristoffer Dall if (vcpu_mode_is_32bit(vcpu)) { 180a8928195SChristoffer Dall vcpu_write_spsr32(vcpu, v); 18100536ec4SChristoffer Dall return; 18200536ec4SChristoffer Dall } 18300536ec4SChristoffer Dall 18400536ec4SChristoffer Dall if (vcpu->arch.sysregs_loaded_on_cpu) 18500536ec4SChristoffer Dall write_sysreg_el1(v, spsr); 18600536ec4SChristoffer Dall else 187a8928195SChristoffer Dall vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1] = v; 18883a49794SMarc Zyngier } 18983a49794SMarc Zyngier 19083a49794SMarc Zyngier static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu) 19183a49794SMarc Zyngier { 1929586a2eaSShannon Zhao u32 mode; 19383a49794SMarc Zyngier 1949586a2eaSShannon Zhao if (vcpu_mode_is_32bit(vcpu)) { 1959586a2eaSShannon Zhao mode = *vcpu_cpsr(vcpu) & COMPAT_PSR_MODE_MASK; 196b547631fSMarc Zyngier return mode > COMPAT_PSR_MODE_USR; 1979586a2eaSShannon Zhao } 1989586a2eaSShannon Zhao 1999586a2eaSShannon Zhao mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK; 200b547631fSMarc Zyngier 20183a49794SMarc Zyngier return mode != PSR_MODE_EL0t; 20283a49794SMarc Zyngier } 20383a49794SMarc Zyngier 20483a49794SMarc Zyngier static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu) 20583a49794SMarc Zyngier { 20683a49794SMarc Zyngier return vcpu->arch.fault.esr_el2; 20783a49794SMarc Zyngier } 20883a49794SMarc Zyngier 2093e51d435SMarc Zyngier static inline int kvm_vcpu_get_condition(const struct kvm_vcpu *vcpu) 2103e51d435SMarc Zyngier { 2113e51d435SMarc Zyngier u32 esr = kvm_vcpu_get_hsr(vcpu); 2123e51d435SMarc Zyngier 2133e51d435SMarc Zyngier if (esr & ESR_ELx_CV) 2143e51d435SMarc Zyngier return (esr & ESR_ELx_COND_MASK) >> ESR_ELx_COND_SHIFT; 2153e51d435SMarc Zyngier 2163e51d435SMarc Zyngier return -1; 2173e51d435SMarc Zyngier } 2183e51d435SMarc Zyngier 21983a49794SMarc Zyngier static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu) 22083a49794SMarc Zyngier { 22183a49794SMarc Zyngier return vcpu->arch.fault.far_el2; 22283a49794SMarc Zyngier } 22383a49794SMarc Zyngier 22483a49794SMarc Zyngier static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu) 22583a49794SMarc Zyngier { 22683a49794SMarc Zyngier return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8; 22783a49794SMarc Zyngier } 22883a49794SMarc Zyngier 2290067df41SJames Morse static inline u64 kvm_vcpu_get_disr(const struct kvm_vcpu *vcpu) 2300067df41SJames Morse { 2310067df41SJames Morse return vcpu->arch.fault.disr_el1; 2320067df41SJames Morse } 2330067df41SJames Morse 2340d97f884SWei Huang static inline u32 kvm_vcpu_hvc_get_imm(const struct kvm_vcpu *vcpu) 2350d97f884SWei Huang { 2361c6007d5SPaolo Bonzini return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_xVC_IMM_MASK; 2370d97f884SWei Huang } 2380d97f884SWei Huang 23983a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu) 24083a49794SMarc Zyngier { 241c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_ISV); 24283a49794SMarc Zyngier } 24383a49794SMarc Zyngier 24483a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu) 24583a49794SMarc Zyngier { 246c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SSE); 24783a49794SMarc Zyngier } 24883a49794SMarc Zyngier 24983a49794SMarc Zyngier static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu) 25083a49794SMarc Zyngier { 251c6d01a94SMark Rutland return (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SRT_MASK) >> ESR_ELx_SRT_SHIFT; 25283a49794SMarc Zyngier } 25383a49794SMarc Zyngier 25483a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu) 25583a49794SMarc Zyngier { 256c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_S1PTW); 25783a49794SMarc Zyngier } 25883a49794SMarc Zyngier 25960e21a0eSWill Deacon static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu) 26060e21a0eSWill Deacon { 26160e21a0eSWill Deacon return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WNR) || 26260e21a0eSWill Deacon kvm_vcpu_dabt_iss1tw(vcpu); /* AF/DBM update */ 26360e21a0eSWill Deacon } 26460e21a0eSWill Deacon 26557c841f1SMarc Zyngier static inline bool kvm_vcpu_dabt_is_cm(const struct kvm_vcpu *vcpu) 26657c841f1SMarc Zyngier { 26757c841f1SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_CM); 26857c841f1SMarc Zyngier } 26957c841f1SMarc Zyngier 27083a49794SMarc Zyngier static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu) 27183a49794SMarc Zyngier { 272c6d01a94SMark Rutland return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SAS) >> ESR_ELx_SAS_SHIFT); 27383a49794SMarc Zyngier } 27483a49794SMarc Zyngier 27583a49794SMarc Zyngier /* This one is not specific to Data Abort */ 27683a49794SMarc Zyngier static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu) 27783a49794SMarc Zyngier { 278c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_IL); 27983a49794SMarc Zyngier } 28083a49794SMarc Zyngier 28183a49794SMarc Zyngier static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu) 28283a49794SMarc Zyngier { 283561454e2SMark Rutland return ESR_ELx_EC(kvm_vcpu_get_hsr(vcpu)); 28483a49794SMarc Zyngier } 28583a49794SMarc Zyngier 28683a49794SMarc Zyngier static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu) 28783a49794SMarc Zyngier { 288c6d01a94SMark Rutland return kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_IABT_LOW; 28983a49794SMarc Zyngier } 29083a49794SMarc Zyngier 29183a49794SMarc Zyngier static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu) 29283a49794SMarc Zyngier { 293c6d01a94SMark Rutland return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC; 2940496daa5SChristoffer Dall } 2950496daa5SChristoffer Dall 2960496daa5SChristoffer Dall static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu) 2970496daa5SChristoffer Dall { 298c6d01a94SMark Rutland return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC_TYPE; 29983a49794SMarc Zyngier } 30083a49794SMarc Zyngier 301bb428921SJames Morse static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu) 302bb428921SJames Morse { 303a2b83133SDongjiu Geng switch (kvm_vcpu_trap_get_fault(vcpu)) { 304bb428921SJames Morse case FSC_SEA: 305bb428921SJames Morse case FSC_SEA_TTW0: 306bb428921SJames Morse case FSC_SEA_TTW1: 307bb428921SJames Morse case FSC_SEA_TTW2: 308bb428921SJames Morse case FSC_SEA_TTW3: 309bb428921SJames Morse case FSC_SECC: 310bb428921SJames Morse case FSC_SECC_TTW0: 311bb428921SJames Morse case FSC_SECC_TTW1: 312bb428921SJames Morse case FSC_SECC_TTW2: 313bb428921SJames Morse case FSC_SECC_TTW3: 314bb428921SJames Morse return true; 315bb428921SJames Morse default: 316bb428921SJames Morse return false; 317bb428921SJames Morse } 318bb428921SJames Morse } 319bb428921SJames Morse 320c667186fSMarc Zyngier static inline int kvm_vcpu_sys_get_rt(struct kvm_vcpu *vcpu) 321c667186fSMarc Zyngier { 322c667186fSMarc Zyngier u32 esr = kvm_vcpu_get_hsr(vcpu); 323c667186fSMarc Zyngier return (esr & ESR_ELx_SYS64_ISS_RT_MASK) >> ESR_ELx_SYS64_ISS_RT_SHIFT; 324c667186fSMarc Zyngier } 325c667186fSMarc Zyngier 3264429fc64SAndre Przywara static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu) 32779c64880SMarc Zyngier { 3288d404c4cSChristoffer Dall return vcpu_read_sys_reg(vcpu, MPIDR_EL1) & MPIDR_HWID_BITMASK; 32979c64880SMarc Zyngier } 33079c64880SMarc Zyngier 331ce94fe93SMarc Zyngier static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu) 332ce94fe93SMarc Zyngier { 3338d404c4cSChristoffer Dall if (vcpu_mode_is_32bit(vcpu)) { 334ce94fe93SMarc Zyngier *vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT; 3358d404c4cSChristoffer Dall } else { 3368d404c4cSChristoffer Dall u64 sctlr = vcpu_read_sys_reg(vcpu, SCTLR_EL1); 3378d404c4cSChristoffer Dall sctlr |= (1 << 25); 3381975fa56SJames Morse vcpu_write_sys_reg(vcpu, sctlr, SCTLR_EL1); 3398d404c4cSChristoffer Dall } 340ce94fe93SMarc Zyngier } 341ce94fe93SMarc Zyngier 3426d89d2d9SMarc Zyngier static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu) 3436d89d2d9SMarc Zyngier { 3446d89d2d9SMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 3456d89d2d9SMarc Zyngier return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT); 3466d89d2d9SMarc Zyngier 3478d404c4cSChristoffer Dall return !!(vcpu_read_sys_reg(vcpu, SCTLR_EL1) & (1 << 25)); 3486d89d2d9SMarc Zyngier } 3496d89d2d9SMarc Zyngier 3506d89d2d9SMarc Zyngier static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu, 3516d89d2d9SMarc Zyngier unsigned long data, 3526d89d2d9SMarc Zyngier unsigned int len) 3536d89d2d9SMarc Zyngier { 3546d89d2d9SMarc Zyngier if (kvm_vcpu_is_be(vcpu)) { 3556d89d2d9SMarc Zyngier switch (len) { 3566d89d2d9SMarc Zyngier case 1: 3576d89d2d9SMarc Zyngier return data & 0xff; 3586d89d2d9SMarc Zyngier case 2: 3596d89d2d9SMarc Zyngier return be16_to_cpu(data & 0xffff); 3606d89d2d9SMarc Zyngier case 4: 3616d89d2d9SMarc Zyngier return be32_to_cpu(data & 0xffffffff); 3626d89d2d9SMarc Zyngier default: 3636d89d2d9SMarc Zyngier return be64_to_cpu(data); 3646d89d2d9SMarc Zyngier } 365b3007086SVictor Kamensky } else { 366b3007086SVictor Kamensky switch (len) { 367b3007086SVictor Kamensky case 1: 368b3007086SVictor Kamensky return data & 0xff; 369b3007086SVictor Kamensky case 2: 370b3007086SVictor Kamensky return le16_to_cpu(data & 0xffff); 371b3007086SVictor Kamensky case 4: 372b3007086SVictor Kamensky return le32_to_cpu(data & 0xffffffff); 373b3007086SVictor Kamensky default: 374b3007086SVictor Kamensky return le64_to_cpu(data); 375b3007086SVictor Kamensky } 3766d89d2d9SMarc Zyngier } 3776d89d2d9SMarc Zyngier 3786d89d2d9SMarc Zyngier return data; /* Leave LE untouched */ 3796d89d2d9SMarc Zyngier } 3806d89d2d9SMarc Zyngier 3816d89d2d9SMarc Zyngier static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu, 3826d89d2d9SMarc Zyngier unsigned long data, 3836d89d2d9SMarc Zyngier unsigned int len) 3846d89d2d9SMarc Zyngier { 3856d89d2d9SMarc Zyngier if (kvm_vcpu_is_be(vcpu)) { 3866d89d2d9SMarc Zyngier switch (len) { 3876d89d2d9SMarc Zyngier case 1: 3886d89d2d9SMarc Zyngier return data & 0xff; 3896d89d2d9SMarc Zyngier case 2: 3906d89d2d9SMarc Zyngier return cpu_to_be16(data & 0xffff); 3916d89d2d9SMarc Zyngier case 4: 3926d89d2d9SMarc Zyngier return cpu_to_be32(data & 0xffffffff); 3936d89d2d9SMarc Zyngier default: 3946d89d2d9SMarc Zyngier return cpu_to_be64(data); 3956d89d2d9SMarc Zyngier } 396b3007086SVictor Kamensky } else { 397b3007086SVictor Kamensky switch (len) { 398b3007086SVictor Kamensky case 1: 399b3007086SVictor Kamensky return data & 0xff; 400b3007086SVictor Kamensky case 2: 401b3007086SVictor Kamensky return cpu_to_le16(data & 0xffff); 402b3007086SVictor Kamensky case 4: 403b3007086SVictor Kamensky return cpu_to_le32(data & 0xffffffff); 404b3007086SVictor Kamensky default: 405b3007086SVictor Kamensky return cpu_to_le64(data); 406b3007086SVictor Kamensky } 4076d89d2d9SMarc Zyngier } 4086d89d2d9SMarc Zyngier 4096d89d2d9SMarc Zyngier return data; /* Leave LE untouched */ 4106d89d2d9SMarc Zyngier } 4116d89d2d9SMarc Zyngier 41283a49794SMarc Zyngier #endif /* __ARM64_KVM_EMULATE_H__ */ 413