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> 3283a49794SMarc Zyngier 33b547631fSMarc Zyngier unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num); 34b547631fSMarc Zyngier unsigned long *vcpu_spsr32(const struct kvm_vcpu *vcpu); 35b547631fSMarc Zyngier 3627b190bdSMarc Zyngier bool kvm_condition_valid32(const struct kvm_vcpu *vcpu); 3727b190bdSMarc Zyngier void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr); 3827b190bdSMarc Zyngier 3983a49794SMarc Zyngier void kvm_inject_undefined(struct kvm_vcpu *vcpu); 4083a49794SMarc Zyngier void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr); 4183a49794SMarc Zyngier void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr); 4283a49794SMarc Zyngier 43b856a591SChristoffer Dall static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu) 44b856a591SChristoffer Dall { 45b856a591SChristoffer Dall vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS; 46b856a591SChristoffer Dall } 47b856a591SChristoffer Dall 4883a49794SMarc Zyngier static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu) 4983a49794SMarc Zyngier { 5083a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc; 5183a49794SMarc Zyngier } 5283a49794SMarc Zyngier 5383a49794SMarc Zyngier static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu) 5483a49794SMarc Zyngier { 5583a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1; 5683a49794SMarc Zyngier } 5783a49794SMarc Zyngier 5883a49794SMarc Zyngier static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu) 5983a49794SMarc Zyngier { 6083a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate; 6183a49794SMarc Zyngier } 6283a49794SMarc Zyngier 6383a49794SMarc Zyngier static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu) 6483a49794SMarc Zyngier { 65b547631fSMarc Zyngier return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT); 6683a49794SMarc Zyngier } 6783a49794SMarc Zyngier 6883a49794SMarc Zyngier static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu) 6983a49794SMarc Zyngier { 7027b190bdSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 7127b190bdSMarc Zyngier return kvm_condition_valid32(vcpu); 7227b190bdSMarc Zyngier 7327b190bdSMarc Zyngier return true; 7483a49794SMarc Zyngier } 7583a49794SMarc Zyngier 7683a49794SMarc Zyngier static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr) 7783a49794SMarc Zyngier { 7827b190bdSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 7927b190bdSMarc Zyngier kvm_skip_instr32(vcpu, is_wide_instr); 8027b190bdSMarc Zyngier else 8183a49794SMarc Zyngier *vcpu_pc(vcpu) += 4; 8283a49794SMarc Zyngier } 8383a49794SMarc Zyngier 8483a49794SMarc Zyngier static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu) 8583a49794SMarc Zyngier { 86b547631fSMarc Zyngier *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT; 8783a49794SMarc Zyngier } 8883a49794SMarc Zyngier 8983a49794SMarc Zyngier static inline unsigned long *vcpu_reg(const struct kvm_vcpu *vcpu, u8 reg_num) 9083a49794SMarc Zyngier { 91b547631fSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 92b547631fSMarc Zyngier return vcpu_reg32(vcpu, reg_num); 93b547631fSMarc Zyngier 9483a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.regs[reg_num]; 9583a49794SMarc Zyngier } 9683a49794SMarc Zyngier 9783a49794SMarc Zyngier /* Get vcpu SPSR for current mode */ 9883a49794SMarc Zyngier static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu) 9983a49794SMarc Zyngier { 100b547631fSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 101b547631fSMarc Zyngier return vcpu_spsr32(vcpu); 102b547631fSMarc Zyngier 10383a49794SMarc Zyngier return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1]; 10483a49794SMarc Zyngier } 10583a49794SMarc Zyngier 10683a49794SMarc Zyngier static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu) 10783a49794SMarc Zyngier { 10883a49794SMarc Zyngier u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK; 10983a49794SMarc Zyngier 110b547631fSMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 111b547631fSMarc Zyngier return mode > COMPAT_PSR_MODE_USR; 112b547631fSMarc Zyngier 11383a49794SMarc Zyngier return mode != PSR_MODE_EL0t; 11483a49794SMarc Zyngier } 11583a49794SMarc Zyngier 11683a49794SMarc Zyngier static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu) 11783a49794SMarc Zyngier { 11883a49794SMarc Zyngier return vcpu->arch.fault.esr_el2; 11983a49794SMarc Zyngier } 12083a49794SMarc Zyngier 12183a49794SMarc Zyngier static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu) 12283a49794SMarc Zyngier { 12383a49794SMarc Zyngier return vcpu->arch.fault.far_el2; 12483a49794SMarc Zyngier } 12583a49794SMarc Zyngier 12683a49794SMarc Zyngier static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu) 12783a49794SMarc Zyngier { 12883a49794SMarc Zyngier return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8; 12983a49794SMarc Zyngier } 13083a49794SMarc Zyngier 13183a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu) 13283a49794SMarc Zyngier { 133c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_ISV); 13483a49794SMarc Zyngier } 13583a49794SMarc Zyngier 13683a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu) 13783a49794SMarc Zyngier { 138c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WNR); 13983a49794SMarc Zyngier } 14083a49794SMarc Zyngier 14183a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu) 14283a49794SMarc Zyngier { 143c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SSE); 14483a49794SMarc Zyngier } 14583a49794SMarc Zyngier 14683a49794SMarc Zyngier static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu) 14783a49794SMarc Zyngier { 148c6d01a94SMark Rutland return (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SRT_MASK) >> ESR_ELx_SRT_SHIFT; 14983a49794SMarc Zyngier } 15083a49794SMarc Zyngier 15183a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu) 15283a49794SMarc Zyngier { 153c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_EA); 15483a49794SMarc Zyngier } 15583a49794SMarc Zyngier 15683a49794SMarc Zyngier static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu) 15783a49794SMarc Zyngier { 158c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_S1PTW); 15983a49794SMarc Zyngier } 16083a49794SMarc Zyngier 16183a49794SMarc Zyngier static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu) 16283a49794SMarc Zyngier { 163c6d01a94SMark Rutland return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SAS) >> ESR_ELx_SAS_SHIFT); 16483a49794SMarc Zyngier } 16583a49794SMarc Zyngier 16683a49794SMarc Zyngier /* This one is not specific to Data Abort */ 16783a49794SMarc Zyngier static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu) 16883a49794SMarc Zyngier { 169c6d01a94SMark Rutland return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_IL); 17083a49794SMarc Zyngier } 17183a49794SMarc Zyngier 17283a49794SMarc Zyngier static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu) 17383a49794SMarc Zyngier { 174c6d01a94SMark Rutland return kvm_vcpu_get_hsr(vcpu) >> ESR_ELx_EC_SHIFT; 17583a49794SMarc Zyngier } 17683a49794SMarc Zyngier 17783a49794SMarc Zyngier static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu) 17883a49794SMarc Zyngier { 179c6d01a94SMark Rutland return kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_IABT_LOW; 18083a49794SMarc Zyngier } 18183a49794SMarc Zyngier 18283a49794SMarc Zyngier static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu) 18383a49794SMarc Zyngier { 184c6d01a94SMark Rutland return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC; 1850496daa5SChristoffer Dall } 1860496daa5SChristoffer Dall 1870496daa5SChristoffer Dall static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu) 1880496daa5SChristoffer Dall { 189c6d01a94SMark Rutland return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC_TYPE; 19083a49794SMarc Zyngier } 19183a49794SMarc Zyngier 19279c64880SMarc Zyngier static inline unsigned long kvm_vcpu_get_mpidr(struct kvm_vcpu *vcpu) 19379c64880SMarc Zyngier { 19479c64880SMarc Zyngier return vcpu_sys_reg(vcpu, MPIDR_EL1); 19579c64880SMarc Zyngier } 19679c64880SMarc Zyngier 197ce94fe93SMarc Zyngier static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu) 198ce94fe93SMarc Zyngier { 199ce94fe93SMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 200ce94fe93SMarc Zyngier *vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT; 201ce94fe93SMarc Zyngier else 202ce94fe93SMarc Zyngier vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25); 203ce94fe93SMarc Zyngier } 204ce94fe93SMarc Zyngier 2056d89d2d9SMarc Zyngier static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu) 2066d89d2d9SMarc Zyngier { 2076d89d2d9SMarc Zyngier if (vcpu_mode_is_32bit(vcpu)) 2086d89d2d9SMarc Zyngier return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT); 2096d89d2d9SMarc Zyngier 2106d89d2d9SMarc Zyngier return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25)); 2116d89d2d9SMarc Zyngier } 2126d89d2d9SMarc Zyngier 2136d89d2d9SMarc Zyngier static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu, 2146d89d2d9SMarc Zyngier unsigned long data, 2156d89d2d9SMarc Zyngier unsigned int len) 2166d89d2d9SMarc Zyngier { 2176d89d2d9SMarc Zyngier if (kvm_vcpu_is_be(vcpu)) { 2186d89d2d9SMarc Zyngier switch (len) { 2196d89d2d9SMarc Zyngier case 1: 2206d89d2d9SMarc Zyngier return data & 0xff; 2216d89d2d9SMarc Zyngier case 2: 2226d89d2d9SMarc Zyngier return be16_to_cpu(data & 0xffff); 2236d89d2d9SMarc Zyngier case 4: 2246d89d2d9SMarc Zyngier return be32_to_cpu(data & 0xffffffff); 2256d89d2d9SMarc Zyngier default: 2266d89d2d9SMarc Zyngier return be64_to_cpu(data); 2276d89d2d9SMarc Zyngier } 228b3007086SVictor Kamensky } else { 229b3007086SVictor Kamensky switch (len) { 230b3007086SVictor Kamensky case 1: 231b3007086SVictor Kamensky return data & 0xff; 232b3007086SVictor Kamensky case 2: 233b3007086SVictor Kamensky return le16_to_cpu(data & 0xffff); 234b3007086SVictor Kamensky case 4: 235b3007086SVictor Kamensky return le32_to_cpu(data & 0xffffffff); 236b3007086SVictor Kamensky default: 237b3007086SVictor Kamensky return le64_to_cpu(data); 238b3007086SVictor Kamensky } 2396d89d2d9SMarc Zyngier } 2406d89d2d9SMarc Zyngier 2416d89d2d9SMarc Zyngier return data; /* Leave LE untouched */ 2426d89d2d9SMarc Zyngier } 2436d89d2d9SMarc Zyngier 2446d89d2d9SMarc Zyngier static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu, 2456d89d2d9SMarc Zyngier unsigned long data, 2466d89d2d9SMarc Zyngier unsigned int len) 2476d89d2d9SMarc Zyngier { 2486d89d2d9SMarc Zyngier if (kvm_vcpu_is_be(vcpu)) { 2496d89d2d9SMarc Zyngier switch (len) { 2506d89d2d9SMarc Zyngier case 1: 2516d89d2d9SMarc Zyngier return data & 0xff; 2526d89d2d9SMarc Zyngier case 2: 2536d89d2d9SMarc Zyngier return cpu_to_be16(data & 0xffff); 2546d89d2d9SMarc Zyngier case 4: 2556d89d2d9SMarc Zyngier return cpu_to_be32(data & 0xffffffff); 2566d89d2d9SMarc Zyngier default: 2576d89d2d9SMarc Zyngier return cpu_to_be64(data); 2586d89d2d9SMarc Zyngier } 259b3007086SVictor Kamensky } else { 260b3007086SVictor Kamensky switch (len) { 261b3007086SVictor Kamensky case 1: 262b3007086SVictor Kamensky return data & 0xff; 263b3007086SVictor Kamensky case 2: 264b3007086SVictor Kamensky return cpu_to_le16(data & 0xffff); 265b3007086SVictor Kamensky case 4: 266b3007086SVictor Kamensky return cpu_to_le32(data & 0xffffffff); 267b3007086SVictor Kamensky default: 268b3007086SVictor Kamensky return cpu_to_le64(data); 269b3007086SVictor Kamensky } 2706d89d2d9SMarc Zyngier } 2716d89d2d9SMarc Zyngier 2726d89d2d9SMarc Zyngier return data; /* Leave LE untouched */ 2736d89d2d9SMarc Zyngier } 2746d89d2d9SMarc Zyngier 27583a49794SMarc Zyngier #endif /* __ARM64_KVM_EMULATE_H__ */ 276