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> 29c6d01a94SMark Rutland #include <asm/kvm_asm.h> 3083a49794SMarc Zyngier #include <asm/kvm_mmio.h> 3183a49794SMarc Zyngier #include <asm/ptrace.h> 324429fc64SAndre Przywara #include <asm/cputype.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; 47801f6772SMarc Zyngier if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features)) 48801f6772SMarc Zyngier vcpu->arch.hcr_el2 &= ~HCR_RW; 49b856a591SChristoffer Dall } 50b856a591SChristoffer Dall 513c1e7165SMarc Zyngier static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu) 523c1e7165SMarc Zyngier { 533c1e7165SMarc Zyngier return vcpu->arch.hcr_el2; 543c1e7165SMarc Zyngier } 553c1e7165SMarc Zyngier 563c1e7165SMarc Zyngier static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr) 573c1e7165SMarc Zyngier { 583c1e7165SMarc Zyngier vcpu->arch.hcr_el2 = hcr; 593c1e7165SMarc Zyngier } 603c1e7165SMarc Zyngier 6183a49794SMarc Zyngier static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu) 6283a49794SMarc Zyngier { 6383a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc; 6483a49794SMarc Zyngier } 6583a49794SMarc Zyngier 6683a49794SMarc Zyngier static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu) 6783a49794SMarc Zyngier { 6883a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1; 6983a49794SMarc Zyngier } 7083a49794SMarc Zyngier 7183a49794SMarc Zyngier static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu) 7283a49794SMarc Zyngier { 7383a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate; 7483a49794SMarc Zyngier } 7583a49794SMarc Zyngier 7683a49794SMarc Zyngier static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu) 7783a49794SMarc Zyngier { 78b547631fSMarc Zyngier return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT); 7983a49794SMarc Zyngier } 8083a49794SMarc Zyngier 8183a49794SMarc Zyngier static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu) 8283a49794SMarc Zyngier { 8327b190bdSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 8427b190bdSMarc Zyngier return kvm_condition_valid32(vcpu); 8527b190bdSMarc Zyngier 8627b190bdSMarc Zyngier return true; 8783a49794SMarc Zyngier } 8883a49794SMarc Zyngier 8983a49794SMarc Zyngier static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr) 9083a49794SMarc Zyngier { 9127b190bdSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 9227b190bdSMarc Zyngier kvm_skip_instr32(vcpu, is_wide_instr); 9327b190bdSMarc Zyngier else 9483a49794SMarc Zyngier *vcpu_pc(vcpu) += 4; 9583a49794SMarc Zyngier } 9683a49794SMarc Zyngier 9783a49794SMarc Zyngier static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu) 9883a49794SMarc Zyngier { 99b547631fSMarc Zyngier *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT; 10083a49794SMarc Zyngier } 10183a49794SMarc Zyngier 102c0f09634SMarc Zyngier /* 103c0f09634SMarc Zyngier * vcpu_reg should always be passed a register number coming from a 104c0f09634SMarc Zyngier * read of ESR_EL2. Otherwise, it may give the wrong result on AArch32 105c0f09634SMarc Zyngier * with banked registers. 106c0f09634SMarc Zyngier */ 10783a49794SMarc Zyngier static inline unsigned long *vcpu_reg(const struct kvm_vcpu *vcpu, u8 reg_num) 10883a49794SMarc Zyngier { 10983a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.regs[reg_num]; 11083a49794SMarc Zyngier } 11183a49794SMarc Zyngier 112bc45a516SPavel Fedin static inline unsigned long vcpu_get_reg(const struct kvm_vcpu *vcpu, 113bc45a516SPavel Fedin u8 reg_num) 114bc45a516SPavel Fedin { 115bc45a516SPavel Fedin return (reg_num == 31) ? 0 : vcpu_gp_regs(vcpu)->regs.regs[reg_num]; 116bc45a516SPavel Fedin } 117bc45a516SPavel Fedin 118bc45a516SPavel Fedin static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num, 119bc45a516SPavel Fedin unsigned long val) 120bc45a516SPavel Fedin { 121bc45a516SPavel Fedin if (reg_num != 31) 122bc45a516SPavel Fedin vcpu_gp_regs(vcpu)->regs.regs[reg_num] = val; 123bc45a516SPavel Fedin } 124bc45a516SPavel Fedin 12583a49794SMarc Zyngier /* Get vcpu SPSR for current mode */ 12683a49794SMarc Zyngier static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu) 12783a49794SMarc Zyngier { 128b547631fSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 129b547631fSMarc Zyngier return vcpu_spsr32(vcpu); 130b547631fSMarc Zyngier 13183a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1]; 13283a49794SMarc Zyngier } 13383a49794SMarc Zyngier 13483a49794SMarc Zyngier static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu) 13583a49794SMarc Zyngier { 13683a49794SMarc Zyngier u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK; 13783a49794SMarc Zyngier 138b547631fSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 139b547631fSMarc Zyngier return mode > COMPAT_PSR_MODE_USR; 140b547631fSMarc Zyngier 14183a49794SMarc Zyngier return mode != PSR_MODE_EL0t; 14283a49794SMarc Zyngier } 14383a49794SMarc Zyngier 14483a49794SMarc Zyngier static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu) 14583a49794SMarc Zyngier { 14683a49794SMarc Zyngier return vcpu->arch.fault.esr_el2; 14783a49794SMarc Zyngier } 14883a49794SMarc Zyngier 14983a49794SMarc Zyngier static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu) 15083a49794SMarc Zyngier { 15183a49794SMarc Zyngier return vcpu->arch.fault.far_el2; 15283a49794SMarc Zyngier } 15383a49794SMarc Zyngier 15483a49794SMarc Zyngier static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu) 15583a49794SMarc Zyngier { 15683a49794SMarc Zyngier return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8; 15783a49794SMarc Zyngier } 15883a49794SMarc Zyngier 1590d97f884SWei Huang static inline u32 kvm_vcpu_hvc_get_imm(const struct kvm_vcpu *vcpu) 1600d97f884SWei Huang { 1611c6007d5SPaolo Bonzini return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_xVC_IMM_MASK; 1620d97f884SWei Huang } 1630d97f884SWei Huang 16483a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu) 16583a49794SMarc Zyngier { 166c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_ISV); 16783a49794SMarc Zyngier } 16883a49794SMarc Zyngier 16983a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu) 17083a49794SMarc Zyngier { 171c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WNR); 17283a49794SMarc Zyngier } 17383a49794SMarc Zyngier 17483a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu) 17583a49794SMarc Zyngier { 176c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SSE); 17783a49794SMarc Zyngier } 17883a49794SMarc Zyngier 17983a49794SMarc Zyngier static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu) 18083a49794SMarc Zyngier { 181c6d01a94SMark Rutland return (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SRT_MASK) >> ESR_ELx_SRT_SHIFT; 18283a49794SMarc Zyngier } 18383a49794SMarc Zyngier 18483a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu) 18583a49794SMarc Zyngier { 186c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_EA); 18783a49794SMarc Zyngier } 18883a49794SMarc Zyngier 18983a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu) 19083a49794SMarc Zyngier { 191c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_S1PTW); 19283a49794SMarc Zyngier } 19383a49794SMarc Zyngier 19483a49794SMarc Zyngier static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu) 19583a49794SMarc Zyngier { 196c6d01a94SMark Rutland return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SAS) >> ESR_ELx_SAS_SHIFT); 19783a49794SMarc Zyngier } 19883a49794SMarc Zyngier 19983a49794SMarc Zyngier /* This one is not specific to Data Abort */ 20083a49794SMarc Zyngier static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu) 20183a49794SMarc Zyngier { 202c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_IL); 20383a49794SMarc Zyngier } 20483a49794SMarc Zyngier 20583a49794SMarc Zyngier static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu) 20683a49794SMarc Zyngier { 207c6d01a94SMark Rutland return kvm_vcpu_get_hsr(vcpu) >> ESR_ELx_EC_SHIFT; 20883a49794SMarc Zyngier } 20983a49794SMarc Zyngier 21083a49794SMarc Zyngier static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu) 21183a49794SMarc Zyngier { 212c6d01a94SMark Rutland return kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_IABT_LOW; 21383a49794SMarc Zyngier } 21483a49794SMarc Zyngier 21583a49794SMarc Zyngier static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu) 21683a49794SMarc Zyngier { 217c6d01a94SMark Rutland return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC; 2180496daa5SChristoffer Dall } 2190496daa5SChristoffer Dall 2200496daa5SChristoffer Dall static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu) 2210496daa5SChristoffer Dall { 222c6d01a94SMark Rutland return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC_TYPE; 22383a49794SMarc Zyngier } 22483a49794SMarc Zyngier 2254429fc64SAndre Przywara static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu) 22679c64880SMarc Zyngier { 2274429fc64SAndre Przywara return vcpu_sys_reg(vcpu, MPIDR_EL1) & MPIDR_HWID_BITMASK; 22879c64880SMarc Zyngier } 22979c64880SMarc Zyngier 230ce94fe93SMarc Zyngier static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu) 231ce94fe93SMarc Zyngier { 232ce94fe93SMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 233ce94fe93SMarc Zyngier *vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT; 234ce94fe93SMarc Zyngier else 235ce94fe93SMarc Zyngier vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25); 236ce94fe93SMarc Zyngier } 237ce94fe93SMarc Zyngier 2386d89d2d9SMarc Zyngier static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu) 2396d89d2d9SMarc Zyngier { 2406d89d2d9SMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 2416d89d2d9SMarc Zyngier return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT); 2426d89d2d9SMarc Zyngier 2436d89d2d9SMarc Zyngier return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25)); 2446d89d2d9SMarc Zyngier } 2456d89d2d9SMarc Zyngier 2466d89d2d9SMarc Zyngier static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu, 2476d89d2d9SMarc Zyngier unsigned long data, 2486d89d2d9SMarc Zyngier unsigned int len) 2496d89d2d9SMarc Zyngier { 2506d89d2d9SMarc Zyngier if (kvm_vcpu_is_be(vcpu)) { 2516d89d2d9SMarc Zyngier switch (len) { 2526d89d2d9SMarc Zyngier case 1: 2536d89d2d9SMarc Zyngier return data & 0xff; 2546d89d2d9SMarc Zyngier case 2: 2556d89d2d9SMarc Zyngier return be16_to_cpu(data & 0xffff); 2566d89d2d9SMarc Zyngier case 4: 2576d89d2d9SMarc Zyngier return be32_to_cpu(data & 0xffffffff); 2586d89d2d9SMarc Zyngier default: 2596d89d2d9SMarc Zyngier return be64_to_cpu(data); 2606d89d2d9SMarc Zyngier } 261b3007086SVictor Kamensky } else { 262b3007086SVictor Kamensky switch (len) { 263b3007086SVictor Kamensky case 1: 264b3007086SVictor Kamensky return data & 0xff; 265b3007086SVictor Kamensky case 2: 266b3007086SVictor Kamensky return le16_to_cpu(data & 0xffff); 267b3007086SVictor Kamensky case 4: 268b3007086SVictor Kamensky return le32_to_cpu(data & 0xffffffff); 269b3007086SVictor Kamensky default: 270b3007086SVictor Kamensky return le64_to_cpu(data); 271b3007086SVictor Kamensky } 2726d89d2d9SMarc Zyngier } 2736d89d2d9SMarc Zyngier 2746d89d2d9SMarc Zyngier return data; /* Leave LE untouched */ 2756d89d2d9SMarc Zyngier } 2766d89d2d9SMarc Zyngier 2776d89d2d9SMarc Zyngier static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu, 2786d89d2d9SMarc Zyngier unsigned long data, 2796d89d2d9SMarc Zyngier unsigned int len) 2806d89d2d9SMarc Zyngier { 2816d89d2d9SMarc Zyngier if (kvm_vcpu_is_be(vcpu)) { 2826d89d2d9SMarc Zyngier switch (len) { 2836d89d2d9SMarc Zyngier case 1: 2846d89d2d9SMarc Zyngier return data & 0xff; 2856d89d2d9SMarc Zyngier case 2: 2866d89d2d9SMarc Zyngier return cpu_to_be16(data & 0xffff); 2876d89d2d9SMarc Zyngier case 4: 2886d89d2d9SMarc Zyngier return cpu_to_be32(data & 0xffffffff); 2896d89d2d9SMarc Zyngier default: 2906d89d2d9SMarc Zyngier return cpu_to_be64(data); 2916d89d2d9SMarc Zyngier } 292b3007086SVictor Kamensky } else { 293b3007086SVictor Kamensky switch (len) { 294b3007086SVictor Kamensky case 1: 295b3007086SVictor Kamensky return data & 0xff; 296b3007086SVictor Kamensky case 2: 297b3007086SVictor Kamensky return cpu_to_le16(data & 0xffff); 298b3007086SVictor Kamensky case 4: 299b3007086SVictor Kamensky return cpu_to_le32(data & 0xffffffff); 300b3007086SVictor Kamensky default: 301b3007086SVictor Kamensky return cpu_to_le64(data); 302b3007086SVictor Kamensky } 3036d89d2d9SMarc Zyngier } 3046d89d2d9SMarc Zyngier 3056d89d2d9SMarc Zyngier return data; /* Leave LE untouched */ 3066d89d2d9SMarc Zyngier } 3076d89d2d9SMarc Zyngier 30883a49794SMarc Zyngier #endif /* __ARM64_KVM_EMULATE_H__ */ 309