| /* |
| * 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 PSR_AA32_MODE_ABT ABT_MODE |
| #define PSR_AA32_MODE_UND UND_MODE |
| #define PSR_AA32_T_BIT PSR_T_BIT |
| #define PSR_AA32_I_BIT PSR_I_BIT |
| #define PSR_AA32_A_BIT PSR_A_BIT |
| #define PSR_AA32_E_BIT PSR_E_BIT |
| #define PSR_AA32_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 void vcpu_clear_wfe_traps(struct kvm_vcpu *vcpu) |
| { |
| vcpu->arch.hcr &= ~HCR_TWE; |
| } |
| |
| static inline void vcpu_set_wfe_traps(struct kvm_vcpu *vcpu) |
| { |
| vcpu->arch.hcr |= HCR_TWE; |
| } |
| |
| static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu) |
| { |
| return true; |
| } |
| |
| 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 bool kvm_is_write_fault(struct kvm_vcpu *vcpu) |
| { |
| if (kvm_vcpu_trap_is_iabt(vcpu)) |
| return false; |
| |
| return kvm_vcpu_dabt_iswrite(vcpu); |
| } |
| |
| 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__ */ |
