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_FIQ FIQ_MODE
18 #define PSR_AA32_MODE_SVC SVC_MODE
19 #define PSR_AA32_MODE_ABT ABT_MODE
20 #define PSR_AA32_MODE_UND UND_MODE
21 #define PSR_AA32_T_BIT PSR_T_BIT
22 #define PSR_AA32_F_BIT PSR_F_BIT
23 #define PSR_AA32_I_BIT PSR_I_BIT
24 #define PSR_AA32_A_BIT PSR_A_BIT
25 #define PSR_AA32_E_BIT PSR_E_BIT
26 #define PSR_AA32_IT_MASK PSR_IT_MASK
27 #define PSR_AA32_GE_MASK 0x000f0000
28 #define PSR_AA32_DIT_BIT 0x00200000
29 #define PSR_AA32_PAN_BIT 0x00400000
30 #define PSR_AA32_SSBS_BIT 0x00800000
31 #define PSR_AA32_Q_BIT PSR_Q_BIT
32 #define PSR_AA32_V_BIT PSR_V_BIT
33 #define PSR_AA32_C_BIT PSR_C_BIT
34 #define PSR_AA32_Z_BIT PSR_Z_BIT
35 #define PSR_AA32_N_BIT PSR_N_BIT
37 unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);
39 static inline unsigned long *vcpu_reg32(struct kvm_vcpu *vcpu, u8 reg_num)
41 return vcpu_reg(vcpu, reg_num);
44 unsigned long *__vcpu_spsr(struct kvm_vcpu *vcpu);
46 static inline unsigned long vpcu_read_spsr(struct kvm_vcpu *vcpu)
48 return *__vcpu_spsr(vcpu);
51 static inline void vcpu_write_spsr(struct kvm_vcpu *vcpu, unsigned long v)
53 *__vcpu_spsr(vcpu) = v;
56 static inline unsigned long host_spsr_to_spsr32(unsigned long spsr)
61 static inline unsigned long vcpu_get_reg(struct kvm_vcpu *vcpu,
64 return *vcpu_reg(vcpu, reg_num);
67 static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
70 *vcpu_reg(vcpu, reg_num) = val;
73 bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
74 void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
75 void kvm_inject_undef32(struct kvm_vcpu *vcpu);
76 void kvm_inject_dabt32(struct kvm_vcpu *vcpu, unsigned long addr);
77 void kvm_inject_pabt32(struct kvm_vcpu *vcpu, unsigned long addr);
78 void kvm_inject_vabt(struct kvm_vcpu *vcpu);
80 static inline void kvm_inject_undefined(struct kvm_vcpu *vcpu)
82 kvm_inject_undef32(vcpu);
85 static inline void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr)
87 kvm_inject_dabt32(vcpu, addr);
90 static inline void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr)
92 kvm_inject_pabt32(vcpu, addr);
95 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
97 return kvm_condition_valid32(vcpu);
100 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
102 kvm_skip_instr32(vcpu, is_wide_instr);
105 static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
107 vcpu->arch.hcr = HCR_GUEST_MASK;
110 static inline unsigned long *vcpu_hcr(const struct kvm_vcpu *vcpu)
112 return (unsigned long *)&vcpu->arch.hcr;
115 static inline void vcpu_clear_wfe_traps(struct kvm_vcpu *vcpu)
117 vcpu->arch.hcr &= ~HCR_TWE;
120 static inline void vcpu_set_wfe_traps(struct kvm_vcpu *vcpu)
122 vcpu->arch.hcr |= HCR_TWE;
125 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
130 static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
132 return &vcpu->arch.ctxt.gp_regs.usr_regs.ARM_pc;
135 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
137 return (unsigned long *)&vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr;
140 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
142 *vcpu_cpsr(vcpu) |= PSR_T_BIT;
145 static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
147 unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
148 return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
151 static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
153 unsigned long cpsr_mode = vcpu->arch.ctxt.gp_regs.usr_regs.ARM_cpsr & MODE_MASK;
154 return cpsr_mode > USR_MODE;
157 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
159 return vcpu->arch.fault.hsr;
162 static inline int kvm_vcpu_get_condition(const struct kvm_vcpu *vcpu)
164 u32 hsr = kvm_vcpu_get_hsr(vcpu);
167 return (hsr & HSR_COND) >> HSR_COND_SHIFT;
172 static inline unsigned long kvm_vcpu_get_hfar(struct kvm_vcpu *vcpu)
174 return vcpu->arch.fault.hxfar;
177 static inline phys_addr_t kvm_vcpu_get_fault_ipa(struct kvm_vcpu *vcpu)
179 return ((phys_addr_t)vcpu->arch.fault.hpfar & HPFAR_MASK) << 8;
182 static inline bool kvm_vcpu_dabt_isvalid(struct kvm_vcpu *vcpu)
184 return kvm_vcpu_get_hsr(vcpu) & HSR_ISV;
187 static inline bool kvm_vcpu_dabt_iswrite(struct kvm_vcpu *vcpu)
189 return kvm_vcpu_get_hsr(vcpu) & HSR_WNR;
192 static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu *vcpu)
194 return kvm_vcpu_get_hsr(vcpu) & HSR_SSE;
197 static inline bool kvm_vcpu_dabt_issf(const struct kvm_vcpu *vcpu)
202 static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
204 return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
207 static inline bool kvm_vcpu_dabt_iss1tw(struct kvm_vcpu *vcpu)
209 return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW;
212 static inline bool kvm_vcpu_dabt_is_cm(struct kvm_vcpu *vcpu)
214 return !!(kvm_vcpu_get_hsr(vcpu) & HSR_DABT_CM);
217 /* Get Access Size from a data abort */
218 static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
220 switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
228 kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
233 /* This one is not specific to Data Abort */
234 static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu *vcpu)
236 return kvm_vcpu_get_hsr(vcpu) & HSR_IL;
239 static inline u8 kvm_vcpu_trap_get_class(struct kvm_vcpu *vcpu)
241 return kvm_vcpu_get_hsr(vcpu) >> HSR_EC_SHIFT;
244 static inline bool kvm_vcpu_trap_is_iabt(struct kvm_vcpu *vcpu)
246 return kvm_vcpu_trap_get_class(vcpu) == HSR_EC_IABT;
249 static inline u8 kvm_vcpu_trap_get_fault(struct kvm_vcpu *vcpu)
251 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC;
254 static inline u8 kvm_vcpu_trap_get_fault_type(struct kvm_vcpu *vcpu)
256 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC_TYPE;
259 static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
261 switch (kvm_vcpu_trap_get_fault(vcpu)) {
278 static inline bool kvm_is_write_fault(struct kvm_vcpu *vcpu)
280 if (kvm_vcpu_trap_is_iabt(vcpu))
283 return kvm_vcpu_dabt_iswrite(vcpu);
286 static inline u32 kvm_vcpu_hvc_get_imm(struct kvm_vcpu *vcpu)
288 return kvm_vcpu_get_hsr(vcpu) & HSR_HVC_IMM_MASK;
291 static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
293 return vcpu_cp15(vcpu, c0_MPIDR) & MPIDR_HWID_BITMASK;
296 static inline bool kvm_arm_get_vcpu_workaround_2_flag(struct kvm_vcpu *vcpu)
301 static inline void kvm_arm_set_vcpu_workaround_2_flag(struct kvm_vcpu *vcpu,
306 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
308 *vcpu_cpsr(vcpu) |= PSR_E_BIT;
311 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
313 return !!(*vcpu_cpsr(vcpu) & PSR_E_BIT);
316 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
320 if (kvm_vcpu_is_be(vcpu)) {
325 return be16_to_cpu(data & 0xffff);
327 return be32_to_cpu(data);
334 return le16_to_cpu(data & 0xffff);
336 return le32_to_cpu(data);
341 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
345 if (kvm_vcpu_is_be(vcpu)) {
350 return cpu_to_be16(data & 0xffff);
352 return cpu_to_be32(data);
359 return cpu_to_le16(data & 0xffff);
361 return cpu_to_le32(data);
366 static inline bool vcpu_has_ptrauth(struct kvm_vcpu *vcpu) { return false; }
367 static inline void vcpu_ptrauth_disable(struct kvm_vcpu *vcpu) { }
369 #endif /* __ARM_KVM_EMULATE_H__ */