| /* | |
| * Copyright (C) 2012 - Virtual Open Systems and Columbia University | |
| * Author: Christoffer Dall <c.dall@virtualopensystems.com> | |
| * | |
| * This program is free software; you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License, version 2, as | |
| * published by the Free Software Foundation. | |
| * | |
| * This program is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| * GNU General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU General Public License | |
| * along with this program; if not, write to the Free Software | |
| * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
| */ | |
| #ifndef __ARM_KVM_EMULATE_H__ | |
| #define __ARM_KVM_EMULATE_H__ | |
| #include <linux/kvm_host.h> | |
| #include <asm/kvm_asm.h> | |
| #include <asm/kvm_mmio.h> | |
| #include <asm/kvm_arm.h> | |
| #include <asm/cputype.h> | |
| /* arm64 compatibility macros */ | |
| #define COMPAT_PSR_MODE_ABT ABT_MODE | |
| #define COMPAT_PSR_MODE_UND UND_MODE | |
| #define COMPAT_PSR_T_BIT PSR_T_BIT | |
| #define COMPAT_PSR_I_BIT PSR_I_BIT | |
| #define COMPAT_PSR_A_BIT PSR_A_BIT | |
| #define COMPAT_PSR_E_BIT PSR_E_BIT | |
| #define COMPAT_PSR_IT_MASK PSR_IT_MASK | |
| unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num); | |
| static inline unsigned long *vcpu_reg32(struct kvm_vcpu *vcpu, u8 reg_num) | |
| { | |
| return vcpu_reg(vcpu, reg_num); | |
| } | |
| unsigned long *__vcpu_spsr(struct kvm_vcpu *vcpu); | |
| static inline unsigned long vpcu_read_spsr(struct kvm_vcpu *vcpu) | |
| { | |
| return *__vcpu_spsr(vcpu); | |
| } | |
| static inline void vcpu_write_spsr(struct kvm_vcpu *vcpu, unsigned long v) | |
| { | |
| *__vcpu_spsr(vcpu) = v; | |
| } | |
| static inline unsigned long vcpu_get_reg(struct kvm_vcpu *vcpu, | |
| u8 reg_num) | |
| { | |
| return *vcpu_reg(vcpu, reg_num); | |
| } | |
| static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num, | |
| unsigned long val) | |
| { | |
| *vcpu_reg(vcpu, reg_num) = val; | |
| } | |
| bool kvm_condition_valid32(const struct kvm_vcpu *vcpu); | |
| void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr); | |
| void kvm_inject_undef32(struct kvm_vcpu *vcpu); | |
| void kvm_inject_dabt32(struct kvm_vcpu *vcpu, unsigned long addr); | |
| void kvm_inject_pabt32(struct kvm_vcpu *vcpu, unsigned long addr); | |
| void kvm_inject_vabt(struct kvm_vcpu *vcpu); | |
| static inline void kvm_inject_undefined(struct kvm_vcpu *vcpu) | |
| { | |
| kvm_inject_undef32(vcpu); | |
| } | |
| static inline void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr) | |
| { | |
| kvm_inject_dabt32(vcpu, addr); | |
| } | |
| static inline void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr) | |
| { | |
| kvm_inject_pabt32(vcpu, addr); | |
| } | |
| static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu) | |
| { | |
| return kvm_condition_valid32(vcpu); | |
| } | |
| static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr) | |
| { | |
| kvm_skip_instr32(vcpu, is_wide_instr); | |
| } | |
| static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu) | |
| { | |
| vcpu->arch.hcr = HCR_GUEST_MASK; | |
| } | |
| static inline unsigned long *vcpu_hcr(const struct kvm_vcpu *vcpu) | |
| { | |
| return (unsigned long *)&vcpu->arch.hcr; | |
| } | |
| static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu) | |
| { | |
| return 1; | |
| } | |
| static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu) | |
| { | |
| return &vcpu->arch.ctxt.gp_regs.usr_regs.ARM_pc; | |
| } | |
| static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu) | |
| { | |
| return (unsigned long *)&vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr; | |
| } | |
| static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu) | |
| { | |
| *vcpu_cpsr(vcpu) |= PSR_T_BIT; | |
| } | |
| static inline bool mode_has_spsr(struct kvm_vcpu *vcpu) | |
| { | |
| unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK; | |
| return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE); | |
| } | |
| static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu) | |
| { | |
| unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK; | |
| return cpsr_mode > USR_MODE; | |
| } | |
| static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu) | |
| { | |
| return vcpu->arch.fault.hsr; | |
| } | |
| static inline int kvm_vcpu_get_condition(const struct kvm_vcpu *vcpu) | |
| { | |
| u32 hsr = kvm_vcpu_get_hsr(vcpu); | |
| if (hsr & HSR_CV) | |
| return (hsr & HSR_COND) >> HSR_COND_SHIFT; | |
| return -1; | |
| } | |
| static inline unsigned long kvm_vcpu_get_hfar(struct kvm_vcpu *vcpu) | |
| { | |
| return vcpu->arch.fault.hxfar; | |
| } | |
| static inline phys_addr_t kvm_vcpu_get_fault_ipa(struct kvm_vcpu *vcpu) | |
| { | |
| return ((phys_addr_t)vcpu->arch.fault.hpfar & HPFAR_MASK) << 8; | |
| } | |
| static inline bool kvm_vcpu_dabt_isvalid(struct kvm_vcpu *vcpu) | |
| { | |
| return kvm_vcpu_get_hsr(vcpu) & HSR_ISV; | |
| } | |
| static inline bool kvm_vcpu_dabt_iswrite(struct kvm_vcpu *vcpu) | |
| { | |
| return kvm_vcpu_get_hsr(vcpu) & HSR_WNR; | |
| } | |
| static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu *vcpu) | |
| { | |
| return kvm_vcpu_get_hsr(vcpu) & HSR_SSE; | |
| } | |
| static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu) | |
| { | |
| return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT; | |
| } | |
| static inline bool kvm_vcpu_dabt_iss1tw(struct kvm_vcpu *vcpu) | |
| { | |
| return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW; | |
| } | |
| static inline bool kvm_vcpu_dabt_is_cm(struct kvm_vcpu *vcpu) | |
| { | |
| return !!(kvm_vcpu_get_hsr(vcpu) & HSR_DABT_CM); | |
| } | |
| /* Get Access Size from a data abort */ | |
| static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu) | |
| { | |
| switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) { | |
| case 0: | |
| return 1; | |
| case 1: | |
| return 2; | |
| case 2: | |
| return 4; | |
| default: | |
| kvm_err("Hardware is weird: SAS 0b11 is reserved\n"); | |
| return -EFAULT; | |
| } | |
| } | |
| /* This one is not specific to Data Abort */ | |
| static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu *vcpu) | |
| { | |
| return kvm_vcpu_get_hsr(vcpu) & HSR_IL; | |
| } | |
| static inline u8 kvm_vcpu_trap_get_class(struct kvm_vcpu *vcpu) | |
| { | |
| return kvm_vcpu_get_hsr(vcpu) >> HSR_EC_SHIFT; | |
| } | |
| static inline bool kvm_vcpu_trap_is_iabt(struct kvm_vcpu *vcpu) | |
| { | |
| return kvm_vcpu_trap_get_class(vcpu) == HSR_EC_IABT; | |
| } | |
| static inline u8 kvm_vcpu_trap_get_fault(struct kvm_vcpu *vcpu) | |
| { | |
| return kvm_vcpu_get_hsr(vcpu) & HSR_FSC; | |
| } | |
| static inline u8 kvm_vcpu_trap_get_fault_type(struct kvm_vcpu *vcpu) | |
| { | |
| return kvm_vcpu_get_hsr(vcpu) & HSR_FSC_TYPE; | |
| } | |
| static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu) | |
| { | |
| switch (kvm_vcpu_trap_get_fault(vcpu)) { | |
| case FSC_SEA: | |
| case FSC_SEA_TTW0: | |
| case FSC_SEA_TTW1: | |
| case FSC_SEA_TTW2: | |
| case FSC_SEA_TTW3: | |
| case FSC_SECC: | |
| case FSC_SECC_TTW0: | |
| case FSC_SECC_TTW1: | |
| case FSC_SECC_TTW2: | |
| case FSC_SECC_TTW3: | |
| return true; | |
| default: | |
| return false; | |
| } | |
| } | |
| static inline u32 kvm_vcpu_hvc_get_imm(struct kvm_vcpu *vcpu) | |
| { | |
| return kvm_vcpu_get_hsr(vcpu) & HSR_HVC_IMM_MASK; | |
| } | |
| static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu) | |
| { | |
| return vcpu_cp15(vcpu, c0_MPIDR) & MPIDR_HWID_BITMASK; | |
| } | |
| static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu) | |
| { | |
| *vcpu_cpsr(vcpu) |= PSR_E_BIT; | |
| } | |
| static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu) | |
| { | |
| return !!(*vcpu_cpsr(vcpu) & PSR_E_BIT); | |
| } | |
| static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu, | |
| unsigned long data, | |
| unsigned int len) | |
| { | |
| if (kvm_vcpu_is_be(vcpu)) { | |
| switch (len) { | |
| case 1: | |
| return data & 0xff; | |
| case 2: | |
| return be16_to_cpu(data & 0xffff); | |
| default: | |
| return be32_to_cpu(data); | |
| } | |
| } else { | |
| switch (len) { | |
| case 1: | |
| return data & 0xff; | |
| case 2: | |
| return le16_to_cpu(data & 0xffff); | |
| default: | |
| return le32_to_cpu(data); | |
| } | |
| } | |
| } | |
| static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu, | |
| unsigned long data, | |
| unsigned int len) | |
| { | |
| if (kvm_vcpu_is_be(vcpu)) { | |
| switch (len) { | |
| case 1: | |
| return data & 0xff; | |
| case 2: | |
| return cpu_to_be16(data & 0xffff); | |
| default: | |
| return cpu_to_be32(data); | |
| } | |
| } else { | |
| switch (len) { | |
| case 1: | |
| return data & 0xff; | |
| case 2: | |
| return cpu_to_le16(data & 0xffff); | |
| default: | |
| return cpu_to_le32(data); | |
| } | |
| } | |
| } | |
| #endif /* __ARM_KVM_EMULATE_H__ */ |