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 4183a49794SMarc Zyngier static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu) 4283a49794SMarc Zyngier { 4383a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc; 4483a49794SMarc Zyngier } 4583a49794SMarc Zyngier 4683a49794SMarc Zyngier static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu) 4783a49794SMarc Zyngier { 4883a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1; 4983a49794SMarc Zyngier } 5083a49794SMarc Zyngier 5183a49794SMarc Zyngier static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu) 5283a49794SMarc Zyngier { 5383a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate; 5483a49794SMarc Zyngier } 5583a49794SMarc Zyngier 5683a49794SMarc Zyngier static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu) 5783a49794SMarc Zyngier { 58b547631fSMarc Zyngier return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT); 5983a49794SMarc Zyngier } 6083a49794SMarc Zyngier 6183a49794SMarc Zyngier static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu) 6283a49794SMarc Zyngier { 6327b190bdSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 6427b190bdSMarc Zyngier return kvm_condition_valid32(vcpu); 6527b190bdSMarc Zyngier 6627b190bdSMarc Zyngier return true; 6783a49794SMarc Zyngier } 6883a49794SMarc Zyngier 6983a49794SMarc Zyngier static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr) 7083a49794SMarc Zyngier { 7127b190bdSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 7227b190bdSMarc Zyngier kvm_skip_instr32(vcpu, is_wide_instr); 7327b190bdSMarc Zyngier else 7483a49794SMarc Zyngier *vcpu_pc(vcpu) += 4; 7583a49794SMarc Zyngier } 7683a49794SMarc Zyngier 7783a49794SMarc Zyngier static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu) 7883a49794SMarc Zyngier { 79b547631fSMarc Zyngier *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT; 8083a49794SMarc Zyngier } 8183a49794SMarc Zyngier 8283a49794SMarc Zyngier static inline unsigned long *vcpu_reg(const struct kvm_vcpu *vcpu, u8 reg_num) 8383a49794SMarc Zyngier { 84b547631fSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 85b547631fSMarc Zyngier return vcpu_reg32(vcpu, reg_num); 86b547631fSMarc Zyngier 8783a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.regs[reg_num]; 8883a49794SMarc Zyngier } 8983a49794SMarc Zyngier 9083a49794SMarc Zyngier /* Get vcpu SPSR for current mode */ 9183a49794SMarc Zyngier static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu) 9283a49794SMarc Zyngier { 93b547631fSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 94b547631fSMarc Zyngier return vcpu_spsr32(vcpu); 95b547631fSMarc Zyngier 9683a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1]; 9783a49794SMarc Zyngier } 9883a49794SMarc Zyngier 9983a49794SMarc Zyngier static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu) 10083a49794SMarc Zyngier { 10183a49794SMarc Zyngier u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK; 10283a49794SMarc Zyngier 103b547631fSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 104b547631fSMarc Zyngier return mode > COMPAT_PSR_MODE_USR; 105b547631fSMarc Zyngier 10683a49794SMarc Zyngier return mode != PSR_MODE_EL0t; 10783a49794SMarc Zyngier } 10883a49794SMarc Zyngier 10983a49794SMarc Zyngier static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu) 11083a49794SMarc Zyngier { 11183a49794SMarc Zyngier return vcpu->arch.fault.esr_el2; 11283a49794SMarc Zyngier } 11383a49794SMarc Zyngier 11483a49794SMarc Zyngier static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu) 11583a49794SMarc Zyngier { 11683a49794SMarc Zyngier return vcpu->arch.fault.far_el2; 11783a49794SMarc Zyngier } 11883a49794SMarc Zyngier 11983a49794SMarc Zyngier static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu) 12083a49794SMarc Zyngier { 12183a49794SMarc Zyngier return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8; 12283a49794SMarc Zyngier } 12383a49794SMarc Zyngier 12483a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu) 12583a49794SMarc Zyngier { 12683a49794SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_ISV); 12783a49794SMarc Zyngier } 12883a49794SMarc Zyngier 12983a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu) 13083a49794SMarc Zyngier { 13183a49794SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_WNR); 13283a49794SMarc Zyngier } 13383a49794SMarc Zyngier 13483a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu) 13583a49794SMarc Zyngier { 13683a49794SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SSE); 13783a49794SMarc Zyngier } 13883a49794SMarc Zyngier 13983a49794SMarc Zyngier static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu) 14083a49794SMarc Zyngier { 14183a49794SMarc Zyngier return (kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SRT_MASK) >> ESR_EL2_SRT_SHIFT; 14283a49794SMarc Zyngier } 14383a49794SMarc Zyngier 14483a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu) 14583a49794SMarc Zyngier { 14683a49794SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_EA); 14783a49794SMarc Zyngier } 14883a49794SMarc Zyngier 14983a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu) 15083a49794SMarc Zyngier { 15183a49794SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_S1PTW); 15283a49794SMarc Zyngier } 15383a49794SMarc Zyngier 15483a49794SMarc Zyngier static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu) 15583a49794SMarc Zyngier { 15683a49794SMarc Zyngier return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SAS) >> ESR_EL2_SAS_SHIFT); 15783a49794SMarc Zyngier } 15883a49794SMarc Zyngier 15983a49794SMarc Zyngier /* This one is not specific to Data Abort */ 16083a49794SMarc Zyngier static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu) 16183a49794SMarc Zyngier { 16283a49794SMarc Zyngier return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_IL); 16383a49794SMarc Zyngier } 16483a49794SMarc Zyngier 16583a49794SMarc Zyngier static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu) 16683a49794SMarc Zyngier { 16783a49794SMarc Zyngier return kvm_vcpu_get_hsr(vcpu) >> ESR_EL2_EC_SHIFT; 16883a49794SMarc Zyngier } 16983a49794SMarc Zyngier 17083a49794SMarc Zyngier static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu) 17183a49794SMarc Zyngier { 17283a49794SMarc Zyngier return kvm_vcpu_trap_get_class(vcpu) == ESR_EL2_EC_IABT; 17383a49794SMarc Zyngier } 17483a49794SMarc Zyngier 17583a49794SMarc Zyngier static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu) 17683a49794SMarc Zyngier { 17783a49794SMarc Zyngier return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC_TYPE; 17883a49794SMarc Zyngier } 17983a49794SMarc Zyngier 1806d89d2d9SMarc Zyngier static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu) 1816d89d2d9SMarc Zyngier { 1826d89d2d9SMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 1836d89d2d9SMarc Zyngier return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT); 1846d89d2d9SMarc Zyngier 1856d89d2d9SMarc Zyngier return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25)); 1866d89d2d9SMarc Zyngier } 1876d89d2d9SMarc Zyngier 1886d89d2d9SMarc Zyngier static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu, 1896d89d2d9SMarc Zyngier unsigned long data, 1906d89d2d9SMarc Zyngier unsigned int len) 1916d89d2d9SMarc Zyngier { 1926d89d2d9SMarc Zyngier if (kvm_vcpu_is_be(vcpu)) { 1936d89d2d9SMarc Zyngier switch (len) { 1946d89d2d9SMarc Zyngier case 1: 1956d89d2d9SMarc Zyngier return data & 0xff; 1966d89d2d9SMarc Zyngier case 2: 1976d89d2d9SMarc Zyngier return be16_to_cpu(data & 0xffff); 1986d89d2d9SMarc Zyngier case 4: 1996d89d2d9SMarc Zyngier return be32_to_cpu(data & 0xffffffff); 2006d89d2d9SMarc Zyngier default: 2016d89d2d9SMarc Zyngier return be64_to_cpu(data); 2026d89d2d9SMarc Zyngier } 2036d89d2d9SMarc Zyngier } 2046d89d2d9SMarc Zyngier 2056d89d2d9SMarc Zyngier return data; /* Leave LE untouched */ 2066d89d2d9SMarc Zyngier } 2076d89d2d9SMarc Zyngier 2086d89d2d9SMarc Zyngier static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu, 2096d89d2d9SMarc Zyngier unsigned long data, 2106d89d2d9SMarc Zyngier unsigned int len) 2116d89d2d9SMarc Zyngier { 2126d89d2d9SMarc Zyngier if (kvm_vcpu_is_be(vcpu)) { 2136d89d2d9SMarc Zyngier switch (len) { 2146d89d2d9SMarc Zyngier case 1: 2156d89d2d9SMarc Zyngier return data & 0xff; 2166d89d2d9SMarc Zyngier case 2: 2176d89d2d9SMarc Zyngier return cpu_to_be16(data & 0xffff); 2186d89d2d9SMarc Zyngier case 4: 2196d89d2d9SMarc Zyngier return cpu_to_be32(data & 0xffffffff); 2206d89d2d9SMarc Zyngier default: 2216d89d2d9SMarc Zyngier return cpu_to_be64(data); 2226d89d2d9SMarc Zyngier } 2236d89d2d9SMarc Zyngier } 2246d89d2d9SMarc Zyngier 2256d89d2d9SMarc Zyngier return data; /* Leave LE untouched */ 2266d89d2d9SMarc Zyngier } 2276d89d2d9SMarc Zyngier 22883a49794SMarc Zyngier #endif /* __ARM64_KVM_EMULATE_H__ */ 229