2 * Copyright (C) 2012,2013 - ARM Ltd
3 * Author: Marc Zyngier <marc.zyngier@arm.com>
5 * Derived from arch/arm/include/kvm_emulate.h
6 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
7 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #ifndef __ARM64_KVM_EMULATE_H__
23 #define __ARM64_KVM_EMULATE_H__
25 #include <linux/kvm_host.h>
28 #include <asm/kvm_arm.h>
29 #include <asm/kvm_mmio.h>
30 #include <asm/ptrace.h>
31 #include <asm/cputype.h>
34 unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num);
35 unsigned long *vcpu_spsr32(const struct kvm_vcpu *vcpu);
37 bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
38 void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
40 void kvm_inject_undefined(struct kvm_vcpu *vcpu);
41 void kvm_inject_vabt(struct kvm_vcpu *vcpu);
42 void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
43 void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
45 static inline bool vcpu_el1_is_32bit(struct kvm_vcpu *vcpu)
47 return !(vcpu->arch.hcr_el2 & HCR_RW);
50 static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
52 vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS;
53 if (is_kernel_in_hyp_mode())
54 vcpu->arch.hcr_el2 |= HCR_E2H;
55 if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features))
56 vcpu->arch.hcr_el2 &= ~HCR_RW;
59 static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu)
61 return vcpu->arch.hcr_el2;
64 static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr)
66 vcpu->arch.hcr_el2 = hcr;
69 static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu)
71 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc;
74 static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu)
76 return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1;
79 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
81 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate;
84 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
86 return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT);
89 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
91 if (vcpu_mode_is_32bit(vcpu))
92 return kvm_condition_valid32(vcpu);
97 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
99 if (vcpu_mode_is_32bit(vcpu))
100 kvm_skip_instr32(vcpu, is_wide_instr);
105 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
107 *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT;
111 * vcpu_get_reg and vcpu_set_reg should always be passed a register number
112 * coming from a read of ESR_EL2. Otherwise, it may give the wrong result on
113 * AArch32 with banked registers.
115 static inline unsigned long vcpu_get_reg(const struct kvm_vcpu *vcpu,
118 return (reg_num == 31) ? 0 : vcpu_gp_regs(vcpu)->regs.regs[reg_num];
121 static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
125 vcpu_gp_regs(vcpu)->regs.regs[reg_num] = val;
128 /* Get vcpu SPSR for current mode */
129 static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu)
131 if (vcpu_mode_is_32bit(vcpu))
132 return vcpu_spsr32(vcpu);
134 return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1];
137 static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
141 if (vcpu_mode_is_32bit(vcpu)) {
142 mode = *vcpu_cpsr(vcpu) & COMPAT_PSR_MODE_MASK;
143 return mode > COMPAT_PSR_MODE_USR;
146 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
148 return mode != PSR_MODE_EL0t;
151 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
153 return vcpu->arch.fault.esr_el2;
156 static inline int kvm_vcpu_get_condition(const struct kvm_vcpu *vcpu)
158 u32 esr = kvm_vcpu_get_hsr(vcpu);
160 if (esr & ESR_ELx_CV)
161 return (esr & ESR_ELx_COND_MASK) >> ESR_ELx_COND_SHIFT;
166 static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu)
168 return vcpu->arch.fault.far_el2;
171 static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu)
173 return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8;
176 static inline u32 kvm_vcpu_hvc_get_imm(const struct kvm_vcpu *vcpu)
178 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_xVC_IMM_MASK;
181 static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu)
183 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_ISV);
186 static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu)
188 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SSE);
191 static inline bool kvm_vcpu_dabt_issf(const struct kvm_vcpu *vcpu)
193 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SF);
196 static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu)
198 return (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SRT_MASK) >> ESR_ELx_SRT_SHIFT;
201 static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu)
203 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_S1PTW);
206 static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu)
208 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WNR) ||
209 kvm_vcpu_dabt_iss1tw(vcpu); /* AF/DBM update */
212 static inline bool kvm_vcpu_dabt_is_cm(const struct kvm_vcpu *vcpu)
214 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_CM);
217 static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu)
219 return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SAS) >> ESR_ELx_SAS_SHIFT);
222 /* This one is not specific to Data Abort */
223 static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu)
225 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_IL);
228 static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
230 return ESR_ELx_EC(kvm_vcpu_get_hsr(vcpu));
233 static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
235 return kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_IABT_LOW;
238 static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu)
240 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC;
243 static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu)
245 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC_TYPE;
248 static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu)
250 switch (kvm_vcpu_trap_get_fault_type(vcpu)) {
267 static inline int kvm_vcpu_sys_get_rt(struct kvm_vcpu *vcpu)
269 u32 esr = kvm_vcpu_get_hsr(vcpu);
270 return (esr & ESR_ELx_SYS64_ISS_RT_MASK) >> ESR_ELx_SYS64_ISS_RT_SHIFT;
273 static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
275 return vcpu_sys_reg(vcpu, MPIDR_EL1) & MPIDR_HWID_BITMASK;
278 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
280 if (vcpu_mode_is_32bit(vcpu))
281 *vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT;
283 vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25);
286 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
288 if (vcpu_mode_is_32bit(vcpu))
289 return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT);
291 return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25));
294 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
298 if (kvm_vcpu_is_be(vcpu)) {
303 return be16_to_cpu(data & 0xffff);
305 return be32_to_cpu(data & 0xffffffff);
307 return be64_to_cpu(data);
314 return le16_to_cpu(data & 0xffff);
316 return le32_to_cpu(data & 0xffffffff);
318 return le64_to_cpu(data);
322 return data; /* Leave LE untouched */
325 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
329 if (kvm_vcpu_is_be(vcpu)) {
334 return cpu_to_be16(data & 0xffff);
336 return cpu_to_be32(data & 0xffffffff);
338 return cpu_to_be64(data);
345 return cpu_to_le16(data & 0xffff);
347 return cpu_to_le32(data & 0xffffffff);
349 return cpu_to_le64(data);
353 return data; /* Leave LE untouched */
356 #endif /* __ARM64_KVM_EMULATE_H__ */