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> 2983a49794SMarc Zyngier #include <asm/kvm_mmio.h> 3083a49794SMarc Zyngier #include <asm/ptrace.h> 314429fc64SAndre Przywara #include <asm/cputype.h> 3268908bf7SMarc Zyngier #include <asm/virt.h> 3383a49794SMarc Zyngier 34b547631fSMarc Zyngier unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num); 35b547631fSMarc Zyngier unsigned long *vcpu_spsr32(const struct kvm_vcpu *vcpu); 36b547631fSMarc Zyngier 3727b190bdSMarc Zyngier bool kvm_condition_valid32(const struct kvm_vcpu *vcpu); 3827b190bdSMarc Zyngier void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr); 3927b190bdSMarc Zyngier 4083a49794SMarc Zyngier void kvm_inject_undefined(struct kvm_vcpu *vcpu); 4183a49794SMarc Zyngier void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr); 4283a49794SMarc Zyngier void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr); 4383a49794SMarc Zyngier 44b856a591SChristoffer Dall static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu) 45b856a591SChristoffer Dall { 46b856a591SChristoffer Dall vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS; 4768908bf7SMarc Zyngier if (is_kernel_in_hyp_mode()) 4868908bf7SMarc Zyngier vcpu->arch.hcr_el2 |= HCR_E2H; 49801f6772SMarc Zyngier if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features)) 50801f6772SMarc Zyngier vcpu->arch.hcr_el2 &= ~HCR_RW; 51b856a591SChristoffer Dall } 52b856a591SChristoffer Dall 533c1e7165SMarc Zyngier static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu) 543c1e7165SMarc Zyngier { 553c1e7165SMarc Zyngier return vcpu->arch.hcr_el2; 563c1e7165SMarc Zyngier } 573c1e7165SMarc Zyngier 583c1e7165SMarc Zyngier static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr) 593c1e7165SMarc Zyngier { 603c1e7165SMarc Zyngier vcpu->arch.hcr_el2 = hcr; 613c1e7165SMarc Zyngier } 623c1e7165SMarc Zyngier 6383a49794SMarc Zyngier static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu) 6483a49794SMarc Zyngier { 6583a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc; 6683a49794SMarc Zyngier } 6783a49794SMarc Zyngier 6883a49794SMarc Zyngier static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu) 6983a49794SMarc Zyngier { 7083a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1; 7183a49794SMarc Zyngier } 7283a49794SMarc Zyngier 7383a49794SMarc Zyngier static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu) 7483a49794SMarc Zyngier { 7583a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate; 7683a49794SMarc Zyngier } 7783a49794SMarc Zyngier 7883a49794SMarc Zyngier static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu) 7983a49794SMarc Zyngier { 80b547631fSMarc Zyngier return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT); 8183a49794SMarc Zyngier } 8283a49794SMarc Zyngier 8383a49794SMarc Zyngier static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu) 8483a49794SMarc Zyngier { 8527b190bdSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 8627b190bdSMarc Zyngier return kvm_condition_valid32(vcpu); 8727b190bdSMarc Zyngier 8827b190bdSMarc Zyngier return true; 8983a49794SMarc Zyngier } 9083a49794SMarc Zyngier 9183a49794SMarc Zyngier static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr) 9283a49794SMarc Zyngier { 9327b190bdSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 9427b190bdSMarc Zyngier kvm_skip_instr32(vcpu, is_wide_instr); 9527b190bdSMarc Zyngier else 9683a49794SMarc Zyngier *vcpu_pc(vcpu) += 4; 9783a49794SMarc Zyngier } 9883a49794SMarc Zyngier 9983a49794SMarc Zyngier static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu) 10083a49794SMarc Zyngier { 101b547631fSMarc Zyngier *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT; 10283a49794SMarc Zyngier } 10383a49794SMarc Zyngier 104c0f09634SMarc Zyngier /* 105f6be563aSPavel Fedin * vcpu_get_reg and vcpu_set_reg should always be passed a register number 106f6be563aSPavel Fedin * coming from a read of ESR_EL2. Otherwise, it may give the wrong result on 107f6be563aSPavel Fedin * AArch32 with banked registers. 108c0f09634SMarc Zyngier */ 109bc45a516SPavel Fedin static inline unsigned long vcpu_get_reg(const struct kvm_vcpu *vcpu, 110bc45a516SPavel Fedin u8 reg_num) 111bc45a516SPavel Fedin { 112bc45a516SPavel Fedin return (reg_num == 31) ? 0 : vcpu_gp_regs(vcpu)->regs.regs[reg_num]; 113bc45a516SPavel Fedin } 114bc45a516SPavel Fedin 115bc45a516SPavel Fedin static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num, 116bc45a516SPavel Fedin unsigned long val) 117bc45a516SPavel Fedin { 118bc45a516SPavel Fedin if (reg_num != 31) 119bc45a516SPavel Fedin vcpu_gp_regs(vcpu)->regs.regs[reg_num] = val; 120bc45a516SPavel Fedin } 121bc45a516SPavel Fedin 12283a49794SMarc Zyngier /* Get vcpu SPSR for current mode */ 12383a49794SMarc Zyngier static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu) 12483a49794SMarc Zyngier { 125b547631fSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 126b547631fSMarc Zyngier return vcpu_spsr32(vcpu); 127b547631fSMarc Zyngier 12883a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1]; 12983a49794SMarc Zyngier } 13083a49794SMarc Zyngier 13183a49794SMarc Zyngier static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu) 13283a49794SMarc Zyngier { 1339586a2eaSShannon Zhao u32 mode; 13483a49794SMarc Zyngier 1359586a2eaSShannon Zhao if (vcpu_mode_is_32bit(vcpu)) { 1369586a2eaSShannon Zhao mode = *vcpu_cpsr(vcpu) & COMPAT_PSR_MODE_MASK; 137b547631fSMarc Zyngier return mode > COMPAT_PSR_MODE_USR; 1389586a2eaSShannon Zhao } 1399586a2eaSShannon Zhao 1409586a2eaSShannon Zhao mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK; 141b547631fSMarc Zyngier 14283a49794SMarc Zyngier return mode != PSR_MODE_EL0t; 14383a49794SMarc Zyngier } 14483a49794SMarc Zyngier 14583a49794SMarc Zyngier static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu) 14683a49794SMarc Zyngier { 14783a49794SMarc Zyngier return vcpu->arch.fault.esr_el2; 14883a49794SMarc Zyngier } 14983a49794SMarc Zyngier 15083a49794SMarc Zyngier static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu) 15183a49794SMarc Zyngier { 15283a49794SMarc Zyngier return vcpu->arch.fault.far_el2; 15383a49794SMarc Zyngier } 15483a49794SMarc Zyngier 15583a49794SMarc Zyngier static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu) 15683a49794SMarc Zyngier { 15783a49794SMarc Zyngier return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8; 15883a49794SMarc Zyngier } 15983a49794SMarc Zyngier 1600d97f884SWei Huang static inline u32 kvm_vcpu_hvc_get_imm(const struct kvm_vcpu *vcpu) 1610d97f884SWei Huang { 1621c6007d5SPaolo Bonzini return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_xVC_IMM_MASK; 1630d97f884SWei Huang } 1640d97f884SWei Huang 16583a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu) 16683a49794SMarc Zyngier { 167c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_ISV); 16883a49794SMarc Zyngier } 16983a49794SMarc Zyngier 17083a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu) 17183a49794SMarc Zyngier { 172c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WNR); 17383a49794SMarc Zyngier } 17483a49794SMarc Zyngier 17583a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu) 17683a49794SMarc Zyngier { 177c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SSE); 17883a49794SMarc Zyngier } 17983a49794SMarc Zyngier 18083a49794SMarc Zyngier static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu) 18183a49794SMarc Zyngier { 182c6d01a94SMark Rutland return (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SRT_MASK) >> ESR_ELx_SRT_SHIFT; 18383a49794SMarc Zyngier } 18483a49794SMarc Zyngier 18583a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu) 18683a49794SMarc Zyngier { 187c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_EA); 18883a49794SMarc Zyngier } 18983a49794SMarc Zyngier 19083a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu) 19183a49794SMarc Zyngier { 192c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_S1PTW); 19383a49794SMarc Zyngier } 19483a49794SMarc Zyngier 19557c841f1SMarc Zyngier static inline bool kvm_vcpu_dabt_is_cm(const struct kvm_vcpu *vcpu) 19657c841f1SMarc Zyngier { 19757c841f1SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_CM); 19857c841f1SMarc Zyngier } 19957c841f1SMarc Zyngier 20083a49794SMarc Zyngier static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu) 20183a49794SMarc Zyngier { 202c6d01a94SMark Rutland return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SAS) >> ESR_ELx_SAS_SHIFT); 20383a49794SMarc Zyngier } 20483a49794SMarc Zyngier 20583a49794SMarc Zyngier /* This one is not specific to Data Abort */ 20683a49794SMarc Zyngier static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu) 20783a49794SMarc Zyngier { 208c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_IL); 20983a49794SMarc Zyngier } 21083a49794SMarc Zyngier 21183a49794SMarc Zyngier static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu) 21283a49794SMarc Zyngier { 213c6d01a94SMark Rutland return kvm_vcpu_get_hsr(vcpu) >> ESR_ELx_EC_SHIFT; 21483a49794SMarc Zyngier } 21583a49794SMarc Zyngier 21683a49794SMarc Zyngier static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu) 21783a49794SMarc Zyngier { 218c6d01a94SMark Rutland return kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_IABT_LOW; 21983a49794SMarc Zyngier } 22083a49794SMarc Zyngier 22183a49794SMarc Zyngier static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu) 22283a49794SMarc Zyngier { 223c6d01a94SMark Rutland return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC; 2240496daa5SChristoffer Dall } 2250496daa5SChristoffer Dall 2260496daa5SChristoffer Dall static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu) 2270496daa5SChristoffer Dall { 228c6d01a94SMark Rutland return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC_TYPE; 22983a49794SMarc Zyngier } 23083a49794SMarc Zyngier 2314429fc64SAndre Przywara static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu) 23279c64880SMarc Zyngier { 2334429fc64SAndre Przywara return vcpu_sys_reg(vcpu, MPIDR_EL1) & MPIDR_HWID_BITMASK; 23479c64880SMarc Zyngier } 23579c64880SMarc Zyngier 236ce94fe93SMarc Zyngier static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu) 237ce94fe93SMarc Zyngier { 238ce94fe93SMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 239ce94fe93SMarc Zyngier *vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT; 240ce94fe93SMarc Zyngier else 241ce94fe93SMarc Zyngier vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25); 242ce94fe93SMarc Zyngier } 243ce94fe93SMarc Zyngier 2446d89d2d9SMarc Zyngier static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu) 2456d89d2d9SMarc Zyngier { 2466d89d2d9SMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 2476d89d2d9SMarc Zyngier return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT); 2486d89d2d9SMarc Zyngier 2496d89d2d9SMarc Zyngier return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25)); 2506d89d2d9SMarc Zyngier } 2516d89d2d9SMarc Zyngier 2526d89d2d9SMarc Zyngier static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu, 2536d89d2d9SMarc Zyngier unsigned long data, 2546d89d2d9SMarc Zyngier unsigned int len) 2556d89d2d9SMarc Zyngier { 2566d89d2d9SMarc Zyngier if (kvm_vcpu_is_be(vcpu)) { 2576d89d2d9SMarc Zyngier switch (len) { 2586d89d2d9SMarc Zyngier case 1: 2596d89d2d9SMarc Zyngier return data & 0xff; 2606d89d2d9SMarc Zyngier case 2: 2616d89d2d9SMarc Zyngier return be16_to_cpu(data & 0xffff); 2626d89d2d9SMarc Zyngier case 4: 2636d89d2d9SMarc Zyngier return be32_to_cpu(data & 0xffffffff); 2646d89d2d9SMarc Zyngier default: 2656d89d2d9SMarc Zyngier return be64_to_cpu(data); 2666d89d2d9SMarc Zyngier } 267b3007086SVictor Kamensky } else { 268b3007086SVictor Kamensky switch (len) { 269b3007086SVictor Kamensky case 1: 270b3007086SVictor Kamensky return data & 0xff; 271b3007086SVictor Kamensky case 2: 272b3007086SVictor Kamensky return le16_to_cpu(data & 0xffff); 273b3007086SVictor Kamensky case 4: 274b3007086SVictor Kamensky return le32_to_cpu(data & 0xffffffff); 275b3007086SVictor Kamensky default: 276b3007086SVictor Kamensky return le64_to_cpu(data); 277b3007086SVictor Kamensky } 2786d89d2d9SMarc Zyngier } 2796d89d2d9SMarc Zyngier 2806d89d2d9SMarc Zyngier return data; /* Leave LE untouched */ 2816d89d2d9SMarc Zyngier } 2826d89d2d9SMarc Zyngier 2836d89d2d9SMarc Zyngier static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu, 2846d89d2d9SMarc Zyngier unsigned long data, 2856d89d2d9SMarc Zyngier unsigned int len) 2866d89d2d9SMarc Zyngier { 2876d89d2d9SMarc Zyngier if (kvm_vcpu_is_be(vcpu)) { 2886d89d2d9SMarc Zyngier switch (len) { 2896d89d2d9SMarc Zyngier case 1: 2906d89d2d9SMarc Zyngier return data & 0xff; 2916d89d2d9SMarc Zyngier case 2: 2926d89d2d9SMarc Zyngier return cpu_to_be16(data & 0xffff); 2936d89d2d9SMarc Zyngier case 4: 2946d89d2d9SMarc Zyngier return cpu_to_be32(data & 0xffffffff); 2956d89d2d9SMarc Zyngier default: 2966d89d2d9SMarc Zyngier return cpu_to_be64(data); 2976d89d2d9SMarc Zyngier } 298b3007086SVictor Kamensky } else { 299b3007086SVictor Kamensky switch (len) { 300b3007086SVictor Kamensky case 1: 301b3007086SVictor Kamensky return data & 0xff; 302b3007086SVictor Kamensky case 2: 303b3007086SVictor Kamensky return cpu_to_le16(data & 0xffff); 304b3007086SVictor Kamensky case 4: 305b3007086SVictor Kamensky return cpu_to_le32(data & 0xffffffff); 306b3007086SVictor Kamensky default: 307b3007086SVictor Kamensky return cpu_to_le64(data); 308b3007086SVictor Kamensky } 3096d89d2d9SMarc Zyngier } 3106d89d2d9SMarc Zyngier 3116d89d2d9SMarc Zyngier return data; /* Leave LE untouched */ 3126d89d2d9SMarc Zyngier } 3136d89d2d9SMarc Zyngier 31483a49794SMarc Zyngier #endif /* __ARM64_KVM_EMULATE_H__ */ 315