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_pc(const struct kvm_vcpu *vcpu)
50 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc;
53 static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu)
55 return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1;
58 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
60 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate;
63 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
65 return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT);
68 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
70 if (vcpu_mode_is_32bit(vcpu))
71 return kvm_condition_valid32(vcpu);
76 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
78 if (vcpu_mode_is_32bit(vcpu))
79 kvm_skip_instr32(vcpu, is_wide_instr);
84 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
86 *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT;
89 static inline unsigned long *vcpu_reg(const struct kvm_vcpu *vcpu, u8 reg_num)
91 if (vcpu_mode_is_32bit(vcpu))
92 return vcpu_reg32(vcpu, reg_num);
94 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.regs[reg_num];
97 /* Get vcpu SPSR for current mode */
98 static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu)
100 if (vcpu_mode_is_32bit(vcpu))
101 return vcpu_spsr32(vcpu);
103 return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1];
106 static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
108 u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
110 if (vcpu_mode_is_32bit(vcpu))
111 return mode > COMPAT_PSR_MODE_USR;
113 return mode != PSR_MODE_EL0t;
116 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
118 return vcpu->arch.fault.esr_el2;
121 static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu)
123 return vcpu->arch.fault.far_el2;
126 static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu)
128 return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8;
131 static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu)
133 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_ISV);
136 static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu)
138 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_WNR);
141 static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu)
143 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SSE);
146 static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu)
148 return (kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SRT_MASK) >> ESR_EL2_SRT_SHIFT;
151 static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu)
153 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_EA);
156 static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu)
158 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_S1PTW);
161 static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu)
163 return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SAS) >> ESR_EL2_SAS_SHIFT);
166 /* This one is not specific to Data Abort */
167 static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu)
169 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_IL);
172 static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
174 return kvm_vcpu_get_hsr(vcpu) >> ESR_EL2_EC_SHIFT;
177 static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
179 return kvm_vcpu_trap_get_class(vcpu) == ESR_EL2_EC_IABT;
182 static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu)
184 return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC;
187 static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu)
189 return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC_TYPE;
192 static inline unsigned long kvm_vcpu_get_mpidr(struct kvm_vcpu *vcpu)
194 return vcpu_sys_reg(vcpu, MPIDR_EL1);
197 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
199 if (vcpu_mode_is_32bit(vcpu))
200 *vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT;
202 vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25);
205 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
207 if (vcpu_mode_is_32bit(vcpu))
208 return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT);
210 return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25));
213 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
217 if (kvm_vcpu_is_be(vcpu)) {
222 return be16_to_cpu(data & 0xffff);
224 return be32_to_cpu(data & 0xffffffff);
226 return be64_to_cpu(data);
233 return le16_to_cpu(data & 0xffff);
235 return le32_to_cpu(data & 0xffffffff);
237 return le64_to_cpu(data);
241 return data; /* Leave LE untouched */
244 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
248 if (kvm_vcpu_is_be(vcpu)) {
253 return cpu_to_be16(data & 0xffff);
255 return cpu_to_be32(data & 0xffffffff);
257 return cpu_to_be64(data);
264 return cpu_to_le16(data & 0xffff);
266 return cpu_to_le32(data & 0xffffffff);
268 return cpu_to_le64(data);
272 return data; /* Leave LE untouched */
275 #endif /* __ARM64_KVM_EMULATE_H__ */