1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
4 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
7 #ifndef __ARM_KVM_EMULATE_H__
8 #define __ARM_KVM_EMULATE_H__
10 #include <linux/kvm_host.h>
11 #include <asm/kvm_asm.h>
12 #include <asm/kvm_mmio.h>
13 #include <asm/kvm_arm.h>
14 #include <asm/cputype.h>
16 /* arm64 compatibility macros */
17 #define PSR_AA32_MODE_ABT ABT_MODE
18 #define PSR_AA32_MODE_UND UND_MODE
19 #define PSR_AA32_T_BIT PSR_T_BIT
20 #define PSR_AA32_I_BIT PSR_I_BIT
21 #define PSR_AA32_A_BIT PSR_A_BIT
22 #define PSR_AA32_E_BIT PSR_E_BIT
23 #define PSR_AA32_IT_MASK PSR_IT_MASK
25 unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);
27 static inline unsigned long *vcpu_reg32(struct kvm_vcpu *vcpu, u8 reg_num)
29 return vcpu_reg(vcpu, reg_num);
32 unsigned long *__vcpu_spsr(struct kvm_vcpu *vcpu);
34 static inline unsigned long vpcu_read_spsr(struct kvm_vcpu *vcpu)
36 return *__vcpu_spsr(vcpu);
39 static inline void vcpu_write_spsr(struct kvm_vcpu *vcpu, unsigned long v)
41 *__vcpu_spsr(vcpu) = v;
44 static inline unsigned long vcpu_get_reg(struct kvm_vcpu *vcpu,
47 return *vcpu_reg(vcpu, reg_num);
50 static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
53 *vcpu_reg(vcpu, reg_num) = val;
56 bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
57 void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
58 void kvm_inject_undef32(struct kvm_vcpu *vcpu);
59 void kvm_inject_dabt32(struct kvm_vcpu *vcpu, unsigned long addr);
60 void kvm_inject_pabt32(struct kvm_vcpu *vcpu, unsigned long addr);
61 void kvm_inject_vabt(struct kvm_vcpu *vcpu);
63 static inline void kvm_inject_undefined(struct kvm_vcpu *vcpu)
65 kvm_inject_undef32(vcpu);
68 static inline void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr)
70 kvm_inject_dabt32(vcpu, addr);
73 static inline void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr)
75 kvm_inject_pabt32(vcpu, addr);
78 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
80 return kvm_condition_valid32(vcpu);
83 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
85 kvm_skip_instr32(vcpu, is_wide_instr);
88 static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
90 vcpu->arch.hcr = HCR_GUEST_MASK;
93 static inline unsigned long *vcpu_hcr(const struct kvm_vcpu *vcpu)
95 return (unsigned long *)&vcpu->arch.hcr;
98 static inline void vcpu_clear_wfe_traps(struct kvm_vcpu *vcpu)
100 vcpu->arch.hcr &= ~HCR_TWE;
103 static inline void vcpu_set_wfe_traps(struct kvm_vcpu *vcpu)
105 vcpu->arch.hcr |= HCR_TWE;
108 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
113 static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
115 return &vcpu->arch.ctxt.gp_regs.usr_regs.ARM_pc;
118 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
120 return (unsigned long *)&vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr;
123 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
125 *vcpu_cpsr(vcpu) |= PSR_T_BIT;
128 static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
130 unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
131 return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
134 static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
136 unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
137 return cpsr_mode > USR_MODE;
140 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
142 return vcpu->arch.fault.hsr;
145 static inline int kvm_vcpu_get_condition(const struct kvm_vcpu *vcpu)
147 u32 hsr = kvm_vcpu_get_hsr(vcpu);
150 return (hsr & HSR_COND) >> HSR_COND_SHIFT;
155 static inline unsigned long kvm_vcpu_get_hfar(struct kvm_vcpu *vcpu)
157 return vcpu->arch.fault.hxfar;
160 static inline phys_addr_t kvm_vcpu_get_fault_ipa(struct kvm_vcpu *vcpu)
162 return ((phys_addr_t)vcpu->arch.fault.hpfar & HPFAR_MASK) << 8;
165 static inline bool kvm_vcpu_dabt_isvalid(struct kvm_vcpu *vcpu)
167 return kvm_vcpu_get_hsr(vcpu) & HSR_ISV;
170 static inline bool kvm_vcpu_dabt_iswrite(struct kvm_vcpu *vcpu)
172 return kvm_vcpu_get_hsr(vcpu) & HSR_WNR;
175 static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu *vcpu)
177 return kvm_vcpu_get_hsr(vcpu) & HSR_SSE;
180 static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
182 return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
185 static inline bool kvm_vcpu_dabt_iss1tw(struct kvm_vcpu *vcpu)
187 return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW;
190 static inline bool kvm_vcpu_dabt_is_cm(struct kvm_vcpu *vcpu)
192 return !!(kvm_vcpu_get_hsr(vcpu) & HSR_DABT_CM);
195 /* Get Access Size from a data abort */
196 static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
198 switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
206 kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
211 /* This one is not specific to Data Abort */
212 static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu *vcpu)
214 return kvm_vcpu_get_hsr(vcpu) & HSR_IL;
217 static inline u8 kvm_vcpu_trap_get_class(struct kvm_vcpu *vcpu)
219 return kvm_vcpu_get_hsr(vcpu) >> HSR_EC_SHIFT;
222 static inline bool kvm_vcpu_trap_is_iabt(struct kvm_vcpu *vcpu)
224 return kvm_vcpu_trap_get_class(vcpu) == HSR_EC_IABT;
227 static inline u8 kvm_vcpu_trap_get_fault(struct kvm_vcpu *vcpu)
229 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC;
232 static inline u8 kvm_vcpu_trap_get_fault_type(struct kvm_vcpu *vcpu)
234 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC_TYPE;
237 static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
239 switch (kvm_vcpu_trap_get_fault(vcpu)) {
256 static inline bool kvm_is_write_fault(struct kvm_vcpu *vcpu)
258 if (kvm_vcpu_trap_is_iabt(vcpu))
261 return kvm_vcpu_dabt_iswrite(vcpu);
264 static inline u32 kvm_vcpu_hvc_get_imm(struct kvm_vcpu *vcpu)
266 return kvm_vcpu_get_hsr(vcpu) & HSR_HVC_IMM_MASK;
269 static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
271 return vcpu_cp15(vcpu, c0_MPIDR) & MPIDR_HWID_BITMASK;
274 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
276 *vcpu_cpsr(vcpu) |= PSR_E_BIT;
279 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
281 return !!(*vcpu_cpsr(vcpu) & PSR_E_BIT);
284 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
288 if (kvm_vcpu_is_be(vcpu)) {
293 return be16_to_cpu(data & 0xffff);
295 return be32_to_cpu(data);
302 return le16_to_cpu(data & 0xffff);
304 return le32_to_cpu(data);
309 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
313 if (kvm_vcpu_is_be(vcpu)) {
318 return cpu_to_be16(data & 0xffff);
320 return cpu_to_be32(data);
327 return cpu_to_le16(data & 0xffff);
329 return cpu_to_le32(data);
334 static inline void vcpu_ptrauth_setup_lazy(struct kvm_vcpu *vcpu) {}
336 #endif /* __ARM_KVM_EMULATE_H__ */