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> 2683a49794SMarc Zyngier #include <asm/kvm_asm.h> 2783a49794SMarc Zyngier #include <asm/kvm_arm.h> 2883a49794SMarc Zyngier #include <asm/kvm_mmio.h> 2983a49794SMarc Zyngier #include <asm/ptrace.h> 3083a49794SMarc Zyngier 31b547631fSMarc Zyngier unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num); 32b547631fSMarc Zyngier unsigned long *vcpu_spsr32(const struct kvm_vcpu *vcpu); 33b547631fSMarc Zyngier 3427b190bdSMarc Zyngier bool kvm_condition_valid32(const struct kvm_vcpu *vcpu); 3527b190bdSMarc Zyngier void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr); 3627b190bdSMarc Zyngier 3783a49794SMarc Zyngier void kvm_inject_undefined(struct kvm_vcpu *vcpu); 3883a49794SMarc Zyngier void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr); 3983a49794SMarc Zyngier void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr); 4083a49794SMarc Zyngier 41b856a591SChristoffer Dall static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu) 42b856a591SChristoffer Dall { 43b856a591SChristoffer Dall vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS; 44801f6772SMarc Zyngier if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features)) 45801f6772SMarc Zyngier vcpu->arch.hcr_el2 &= ~HCR_RW; 46b856a591SChristoffer Dall } 47b856a591SChristoffer Dall 483c1e7165SMarc Zyngier static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu) 493c1e7165SMarc Zyngier { 503c1e7165SMarc Zyngier return vcpu->arch.hcr_el2; 513c1e7165SMarc Zyngier } 523c1e7165SMarc Zyngier 533c1e7165SMarc Zyngier static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr) 543c1e7165SMarc Zyngier { 553c1e7165SMarc Zyngier vcpu->arch.hcr_el2 = hcr; 563c1e7165SMarc Zyngier } 573c1e7165SMarc Zyngier 5883a49794SMarc Zyngier static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu) 5983a49794SMarc Zyngier { 6083a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc; 6183a49794SMarc Zyngier } 6283a49794SMarc Zyngier 6383a49794SMarc Zyngier static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu) 6483a49794SMarc Zyngier { 6583a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1; 6683a49794SMarc Zyngier } 6783a49794SMarc Zyngier 6883a49794SMarc Zyngier static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu) 6983a49794SMarc Zyngier { 7083a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate; 7183a49794SMarc Zyngier } 7283a49794SMarc Zyngier 7383a49794SMarc Zyngier static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu) 7483a49794SMarc Zyngier { 75b547631fSMarc Zyngier return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT); 7683a49794SMarc Zyngier } 7783a49794SMarc Zyngier 7883a49794SMarc Zyngier static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu) 7983a49794SMarc Zyngier { 8027b190bdSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 8127b190bdSMarc Zyngier return kvm_condition_valid32(vcpu); 8227b190bdSMarc Zyngier 8327b190bdSMarc Zyngier return true; 8483a49794SMarc Zyngier } 8583a49794SMarc Zyngier 8683a49794SMarc Zyngier static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr) 8783a49794SMarc Zyngier { 8827b190bdSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 8927b190bdSMarc Zyngier kvm_skip_instr32(vcpu, is_wide_instr); 9027b190bdSMarc Zyngier else 9183a49794SMarc Zyngier *vcpu_pc(vcpu) += 4; 9283a49794SMarc Zyngier } 9383a49794SMarc Zyngier 9483a49794SMarc Zyngier static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu) 9583a49794SMarc Zyngier { 96b547631fSMarc Zyngier *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT; 9783a49794SMarc Zyngier } 9883a49794SMarc Zyngier 9983a49794SMarc Zyngier static inline unsigned long *vcpu_reg(const struct kvm_vcpu *vcpu, u8 reg_num) 10083a49794SMarc Zyngier { 101b547631fSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 102b547631fSMarc Zyngier return vcpu_reg32(vcpu, reg_num); 103b547631fSMarc Zyngier 10483a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.regs[reg_num]; 10583a49794SMarc Zyngier } 10683a49794SMarc Zyngier 10783a49794SMarc Zyngier /* Get vcpu SPSR for current mode */ 10883a49794SMarc Zyngier static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu) 10983a49794SMarc Zyngier { 110b547631fSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 111b547631fSMarc Zyngier return vcpu_spsr32(vcpu); 112b547631fSMarc Zyngier 11383a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1]; 11483a49794SMarc Zyngier } 11583a49794SMarc Zyngier 11683a49794SMarc Zyngier static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu) 11783a49794SMarc Zyngier { 11883a49794SMarc Zyngier u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK; 11983a49794SMarc Zyngier 120b547631fSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 121b547631fSMarc Zyngier return mode > COMPAT_PSR_MODE_USR; 122b547631fSMarc Zyngier 12383a49794SMarc Zyngier return mode != PSR_MODE_EL0t; 12483a49794SMarc Zyngier } 12583a49794SMarc Zyngier 12683a49794SMarc Zyngier static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu) 12783a49794SMarc Zyngier { 12883a49794SMarc Zyngier return vcpu->arch.fault.esr_el2; 12983a49794SMarc Zyngier } 13083a49794SMarc Zyngier 13183a49794SMarc Zyngier static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu) 13283a49794SMarc Zyngier { 13383a49794SMarc Zyngier return vcpu->arch.fault.far_el2; 13483a49794SMarc Zyngier } 13583a49794SMarc Zyngier 13683a49794SMarc Zyngier static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu) 13783a49794SMarc Zyngier { 13883a49794SMarc Zyngier return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8; 13983a49794SMarc Zyngier } 14083a49794SMarc Zyngier 14183a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu) 14283a49794SMarc Zyngier { 14383a49794SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_ISV); 14483a49794SMarc Zyngier } 14583a49794SMarc Zyngier 14683a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu) 14783a49794SMarc Zyngier { 14883a49794SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_WNR); 14983a49794SMarc Zyngier } 15083a49794SMarc Zyngier 15183a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu) 15283a49794SMarc Zyngier { 15383a49794SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SSE); 15483a49794SMarc Zyngier } 15583a49794SMarc Zyngier 15683a49794SMarc Zyngier static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu) 15783a49794SMarc Zyngier { 15883a49794SMarc Zyngier return (kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SRT_MASK) >> ESR_EL2_SRT_SHIFT; 15983a49794SMarc Zyngier } 16083a49794SMarc Zyngier 16183a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu) 16283a49794SMarc Zyngier { 16383a49794SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_EA); 16483a49794SMarc Zyngier } 16583a49794SMarc Zyngier 16683a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu) 16783a49794SMarc Zyngier { 16883a49794SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_S1PTW); 16983a49794SMarc Zyngier } 17083a49794SMarc Zyngier 17183a49794SMarc Zyngier static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu) 17283a49794SMarc Zyngier { 17383a49794SMarc Zyngier return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SAS) >> ESR_EL2_SAS_SHIFT); 17483a49794SMarc Zyngier } 17583a49794SMarc Zyngier 17683a49794SMarc Zyngier /* This one is not specific to Data Abort */ 17783a49794SMarc Zyngier static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu) 17883a49794SMarc Zyngier { 17983a49794SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_IL); 18083a49794SMarc Zyngier } 18183a49794SMarc Zyngier 18283a49794SMarc Zyngier static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu) 18383a49794SMarc Zyngier { 18483a49794SMarc Zyngier return kvm_vcpu_get_hsr(vcpu) >> ESR_EL2_EC_SHIFT; 18583a49794SMarc Zyngier } 18683a49794SMarc Zyngier 18783a49794SMarc Zyngier static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu) 18883a49794SMarc Zyngier { 18983a49794SMarc Zyngier return kvm_vcpu_trap_get_class(vcpu) == ESR_EL2_EC_IABT; 19083a49794SMarc Zyngier } 19183a49794SMarc Zyngier 19283a49794SMarc Zyngier static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu) 19383a49794SMarc Zyngier { 1940496daa5SChristoffer Dall return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC; 1950496daa5SChristoffer Dall } 1960496daa5SChristoffer Dall 1970496daa5SChristoffer Dall static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu) 1980496daa5SChristoffer Dall { 19983a49794SMarc Zyngier return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC_TYPE; 20083a49794SMarc Zyngier } 20183a49794SMarc Zyngier 20279c64880SMarc Zyngier static inline unsigned long kvm_vcpu_get_mpidr(struct kvm_vcpu *vcpu) 20379c64880SMarc Zyngier { 20479c64880SMarc Zyngier return vcpu_sys_reg(vcpu, MPIDR_EL1); 20579c64880SMarc Zyngier } 20679c64880SMarc Zyngier 207ce94fe93SMarc Zyngier static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu) 208ce94fe93SMarc Zyngier { 209ce94fe93SMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 210ce94fe93SMarc Zyngier *vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT; 211ce94fe93SMarc Zyngier else 212ce94fe93SMarc Zyngier vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25); 213ce94fe93SMarc Zyngier } 214ce94fe93SMarc Zyngier 2156d89d2d9SMarc Zyngier static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu) 2166d89d2d9SMarc Zyngier { 2176d89d2d9SMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 2186d89d2d9SMarc Zyngier return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT); 2196d89d2d9SMarc Zyngier 2206d89d2d9SMarc Zyngier return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25)); 2216d89d2d9SMarc Zyngier } 2226d89d2d9SMarc Zyngier 2236d89d2d9SMarc Zyngier static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu, 2246d89d2d9SMarc Zyngier unsigned long data, 2256d89d2d9SMarc Zyngier unsigned int len) 2266d89d2d9SMarc Zyngier { 2276d89d2d9SMarc Zyngier if (kvm_vcpu_is_be(vcpu)) { 2286d89d2d9SMarc Zyngier switch (len) { 2296d89d2d9SMarc Zyngier case 1: 2306d89d2d9SMarc Zyngier return data & 0xff; 2316d89d2d9SMarc Zyngier case 2: 2326d89d2d9SMarc Zyngier return be16_to_cpu(data & 0xffff); 2336d89d2d9SMarc Zyngier case 4: 2346d89d2d9SMarc Zyngier return be32_to_cpu(data & 0xffffffff); 2356d89d2d9SMarc Zyngier default: 2366d89d2d9SMarc Zyngier return be64_to_cpu(data); 2376d89d2d9SMarc Zyngier } 238b3007086SVictor Kamensky } else { 239b3007086SVictor Kamensky switch (len) { 240b3007086SVictor Kamensky case 1: 241b3007086SVictor Kamensky return data & 0xff; 242b3007086SVictor Kamensky case 2: 243b3007086SVictor Kamensky return le16_to_cpu(data & 0xffff); 244b3007086SVictor Kamensky case 4: 245b3007086SVictor Kamensky return le32_to_cpu(data & 0xffffffff); 246b3007086SVictor Kamensky default: 247b3007086SVictor Kamensky return le64_to_cpu(data); 248b3007086SVictor Kamensky } 2496d89d2d9SMarc Zyngier } 2506d89d2d9SMarc Zyngier 2516d89d2d9SMarc Zyngier return data; /* Leave LE untouched */ 2526d89d2d9SMarc Zyngier } 2536d89d2d9SMarc Zyngier 2546d89d2d9SMarc Zyngier static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu, 2556d89d2d9SMarc Zyngier unsigned long data, 2566d89d2d9SMarc Zyngier unsigned int len) 2576d89d2d9SMarc Zyngier { 2586d89d2d9SMarc Zyngier if (kvm_vcpu_is_be(vcpu)) { 2596d89d2d9SMarc Zyngier switch (len) { 2606d89d2d9SMarc Zyngier case 1: 2616d89d2d9SMarc Zyngier return data & 0xff; 2626d89d2d9SMarc Zyngier case 2: 2636d89d2d9SMarc Zyngier return cpu_to_be16(data & 0xffff); 2646d89d2d9SMarc Zyngier case 4: 2656d89d2d9SMarc Zyngier return cpu_to_be32(data & 0xffffffff); 2666d89d2d9SMarc Zyngier default: 2676d89d2d9SMarc Zyngier return cpu_to_be64(data); 2686d89d2d9SMarc Zyngier } 269b3007086SVictor Kamensky } else { 270b3007086SVictor Kamensky switch (len) { 271b3007086SVictor Kamensky case 1: 272b3007086SVictor Kamensky return data & 0xff; 273b3007086SVictor Kamensky case 2: 274b3007086SVictor Kamensky return cpu_to_le16(data & 0xffff); 275b3007086SVictor Kamensky case 4: 276b3007086SVictor Kamensky return cpu_to_le32(data & 0xffffffff); 277b3007086SVictor Kamensky default: 278b3007086SVictor Kamensky return cpu_to_le64(data); 279b3007086SVictor Kamensky } 2806d89d2d9SMarc Zyngier } 2816d89d2d9SMarc Zyngier 2826d89d2d9SMarc Zyngier return data; /* Leave LE untouched */ 2836d89d2d9SMarc Zyngier } 2846d89d2d9SMarc Zyngier 28583a49794SMarc Zyngier #endif /* __ARM64_KVM_EMULATE_H__ */ 286