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 void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
47 vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS;
48 if (is_kernel_in_hyp_mode())
49 vcpu->arch.hcr_el2 |= HCR_E2H;
50 if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features))
51 vcpu->arch.hcr_el2 &= ~HCR_RW;
54 static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu)
56 return vcpu->arch.hcr_el2;
59 static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr)
61 vcpu->arch.hcr_el2 = hcr;
64 static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu)
66 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc;
69 static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu)
71 return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1;
74 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
76 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate;
79 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
81 return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT);
84 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
86 if (vcpu_mode_is_32bit(vcpu))
87 return kvm_condition_valid32(vcpu);
92 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
94 if (vcpu_mode_is_32bit(vcpu))
95 kvm_skip_instr32(vcpu, is_wide_instr);
100 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
102 *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT;
106 * vcpu_get_reg and vcpu_set_reg should always be passed a register number
107 * coming from a read of ESR_EL2. Otherwise, it may give the wrong result on
108 * AArch32 with banked registers.
110 static inline unsigned long vcpu_get_reg(const struct kvm_vcpu *vcpu,
113 return (reg_num == 31) ? 0 : vcpu_gp_regs(vcpu)->regs.regs[reg_num];
116 static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
120 vcpu_gp_regs(vcpu)->regs.regs[reg_num] = val;
123 /* Get vcpu SPSR for current mode */
124 static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu)
126 if (vcpu_mode_is_32bit(vcpu))
127 return vcpu_spsr32(vcpu);
129 return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1];
132 static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
136 if (vcpu_mode_is_32bit(vcpu)) {
137 mode = *vcpu_cpsr(vcpu) & COMPAT_PSR_MODE_MASK;
138 return mode > COMPAT_PSR_MODE_USR;
141 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
143 return mode != PSR_MODE_EL0t;
146 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
148 return vcpu->arch.fault.esr_el2;
151 static inline int kvm_vcpu_get_condition(const struct kvm_vcpu *vcpu)
153 u32 esr = kvm_vcpu_get_hsr(vcpu);
155 if (esr & ESR_ELx_CV)
156 return (esr & ESR_ELx_COND_MASK) >> ESR_ELx_COND_SHIFT;
161 static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu)
163 return vcpu->arch.fault.far_el2;
166 static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu)
168 return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8;
171 static inline u32 kvm_vcpu_hvc_get_imm(const struct kvm_vcpu *vcpu)
173 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_xVC_IMM_MASK;
176 static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu)
178 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_ISV);
181 static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu)
183 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WNR);
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 int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu)
193 return (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SRT_MASK) >> ESR_ELx_SRT_SHIFT;
196 static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu)
198 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_EA);
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_is_cm(const struct kvm_vcpu *vcpu)
208 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_CM);
211 static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu)
213 return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SAS) >> ESR_ELx_SAS_SHIFT);
216 /* This one is not specific to Data Abort */
217 static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu)
219 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_IL);
222 static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
224 return ESR_ELx_EC(kvm_vcpu_get_hsr(vcpu));
227 static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
229 return kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_IABT_LOW;
232 static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu)
234 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC;
237 static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu)
239 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC_TYPE;
242 static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
244 return vcpu_sys_reg(vcpu, MPIDR_EL1) & MPIDR_HWID_BITMASK;
247 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
249 if (vcpu_mode_is_32bit(vcpu))
250 *vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT;
252 vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25);
255 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
257 if (vcpu_mode_is_32bit(vcpu))
258 return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT);
260 return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25));
263 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
267 if (kvm_vcpu_is_be(vcpu)) {
272 return be16_to_cpu(data & 0xffff);
274 return be32_to_cpu(data & 0xffffffff);
276 return be64_to_cpu(data);
283 return le16_to_cpu(data & 0xffff);
285 return le32_to_cpu(data & 0xffffffff);
287 return le64_to_cpu(data);
291 return data; /* Leave LE untouched */
294 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
298 if (kvm_vcpu_is_be(vcpu)) {
303 return cpu_to_be16(data & 0xffff);
305 return cpu_to_be32(data & 0xffffffff);
307 return cpu_to_be64(data);
314 return cpu_to_le16(data & 0xffff);
316 return cpu_to_le32(data & 0xffffffff);
318 return cpu_to_le64(data);
322 return data; /* Leave LE untouched */
325 #endif /* __ARM64_KVM_EMULATE_H__ */