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>
26 #include <asm/kvm_asm.h>
27 #include <asm/kvm_arm.h>
28 #include <asm/kvm_mmio.h>
29 #include <asm/ptrace.h>
31 unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num);
32 unsigned long *vcpu_spsr32(const struct kvm_vcpu *vcpu);
34 bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
35 void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
37 void kvm_inject_undefined(struct kvm_vcpu *vcpu);
38 void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
39 void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
41 static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
43 vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS;
44 if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features))
45 vcpu->arch.hcr_el2 &= ~HCR_RW;
48 static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu)
50 return vcpu->arch.hcr_el2;
53 static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr)
55 vcpu->arch.hcr_el2 = hcr;
58 static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu)
60 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc;
63 static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu)
65 return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1;
68 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
70 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate;
73 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
75 return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT);
78 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
80 if (vcpu_mode_is_32bit(vcpu))
81 return kvm_condition_valid32(vcpu);
86 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
88 if (vcpu_mode_is_32bit(vcpu))
89 kvm_skip_instr32(vcpu, is_wide_instr);
94 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
96 *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT;
99 static inline unsigned long *vcpu_reg(const struct kvm_vcpu *vcpu, u8 reg_num)
101 if (vcpu_mode_is_32bit(vcpu))
102 return vcpu_reg32(vcpu, reg_num);
104 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.regs[reg_num];
107 /* Get vcpu SPSR for current mode */
108 static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu)
110 if (vcpu_mode_is_32bit(vcpu))
111 return vcpu_spsr32(vcpu);
113 return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1];
116 static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
118 u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
120 if (vcpu_mode_is_32bit(vcpu))
121 return mode > COMPAT_PSR_MODE_USR;
123 return mode != PSR_MODE_EL0t;
126 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
128 return vcpu->arch.fault.esr_el2;
131 static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu)
133 return vcpu->arch.fault.far_el2;
136 static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu)
138 return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8;
141 static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu)
143 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_ISV);
146 static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu)
148 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_WNR);
151 static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu)
153 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SSE);
156 static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu)
158 return (kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SRT_MASK) >> ESR_EL2_SRT_SHIFT;
161 static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu)
163 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_EA);
166 static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu)
168 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_S1PTW);
171 static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu)
173 return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SAS) >> ESR_EL2_SAS_SHIFT);
176 /* This one is not specific to Data Abort */
177 static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu)
179 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_IL);
182 static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
184 return kvm_vcpu_get_hsr(vcpu) >> ESR_EL2_EC_SHIFT;
187 static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
189 return kvm_vcpu_trap_get_class(vcpu) == ESR_EL2_EC_IABT;
192 static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu)
194 return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC;
197 static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu)
199 return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC_TYPE;
202 static inline unsigned long kvm_vcpu_get_mpidr(struct kvm_vcpu *vcpu)
204 return vcpu_sys_reg(vcpu, MPIDR_EL1);
207 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
209 if (vcpu_mode_is_32bit(vcpu))
210 *vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT;
212 vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25);
215 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
217 if (vcpu_mode_is_32bit(vcpu))
218 return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT);
220 return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25));
223 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
227 if (kvm_vcpu_is_be(vcpu)) {
232 return be16_to_cpu(data & 0xffff);
234 return be32_to_cpu(data & 0xffffffff);
236 return be64_to_cpu(data);
243 return le16_to_cpu(data & 0xffff);
245 return le32_to_cpu(data & 0xffffffff);
247 return le64_to_cpu(data);
251 return data; /* Leave LE untouched */
254 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
258 if (kvm_vcpu_is_be(vcpu)) {
263 return cpu_to_be16(data & 0xffff);
265 return cpu_to_be32(data & 0xffffffff);
267 return cpu_to_be64(data);
274 return cpu_to_le16(data & 0xffff);
276 return cpu_to_le32(data & 0xffffffff);
278 return cpu_to_le64(data);
282 return data; /* Leave LE untouched */
285 #endif /* __ARM64_KVM_EMULATE_H__ */