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_asm.h>
30 #include <asm/kvm_mmio.h>
31 #include <asm/ptrace.h>
32 #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_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
42 void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
44 static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
46 vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS;
47 if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features))
48 vcpu->arch.hcr_el2 &= ~HCR_RW;
51 static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu)
53 return vcpu->arch.hcr_el2;
56 static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr)
58 vcpu->arch.hcr_el2 = hcr;
61 static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu)
63 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc;
66 static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu)
68 return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1;
71 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
73 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate;
76 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
78 return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT);
81 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
83 if (vcpu_mode_is_32bit(vcpu))
84 return kvm_condition_valid32(vcpu);
89 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
91 if (vcpu_mode_is_32bit(vcpu))
92 kvm_skip_instr32(vcpu, is_wide_instr);
97 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
99 *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT;
103 * vcpu_reg should always be passed a register number coming from a
104 * read of ESR_EL2. Otherwise, it may give the wrong result on AArch32
105 * with banked registers.
107 static inline unsigned long *vcpu_reg(const struct kvm_vcpu *vcpu, u8 reg_num)
109 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.regs[reg_num];
112 /* Get vcpu SPSR for current mode */
113 static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu)
115 if (vcpu_mode_is_32bit(vcpu))
116 return vcpu_spsr32(vcpu);
118 return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1];
121 static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
123 u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
125 if (vcpu_mode_is_32bit(vcpu))
126 return mode > COMPAT_PSR_MODE_USR;
128 return mode != PSR_MODE_EL0t;
131 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
133 return vcpu->arch.fault.esr_el2;
136 static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu)
138 return vcpu->arch.fault.far_el2;
141 static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu)
143 return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8;
146 static inline u32 kvm_vcpu_hvc_get_imm(const struct kvm_vcpu *vcpu)
148 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_xVC_IMM_MASK;
151 static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu)
153 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_ISV);
156 static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu)
158 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WNR);
161 static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu)
163 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SSE);
166 static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu)
168 return (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SRT_MASK) >> ESR_ELx_SRT_SHIFT;
171 static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu)
173 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_EA);
176 static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu)
178 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_S1PTW);
181 static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu)
183 return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SAS) >> ESR_ELx_SAS_SHIFT);
186 /* This one is not specific to Data Abort */
187 static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu)
189 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_IL);
192 static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
194 return kvm_vcpu_get_hsr(vcpu) >> ESR_ELx_EC_SHIFT;
197 static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
199 return kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_IABT_LOW;
202 static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu)
204 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC;
207 static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu)
209 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC_TYPE;
212 static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
214 return vcpu_sys_reg(vcpu, MPIDR_EL1) & MPIDR_HWID_BITMASK;
217 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
219 if (vcpu_mode_is_32bit(vcpu))
220 *vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT;
222 vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25);
225 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
227 if (vcpu_mode_is_32bit(vcpu))
228 return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT);
230 return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25));
233 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
237 if (kvm_vcpu_is_be(vcpu)) {
242 return be16_to_cpu(data & 0xffff);
244 return be32_to_cpu(data & 0xffffffff);
246 return be64_to_cpu(data);
253 return le16_to_cpu(data & 0xffff);
255 return le32_to_cpu(data & 0xffffffff);
257 return le64_to_cpu(data);
261 return data; /* Leave LE untouched */
264 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
268 if (kvm_vcpu_is_be(vcpu)) {
273 return cpu_to_be16(data & 0xffff);
275 return cpu_to_be32(data & 0xffffffff);
277 return cpu_to_be64(data);
284 return cpu_to_le16(data & 0xffff);
286 return cpu_to_le32(data & 0xffffffff);
288 return cpu_to_le64(data);
292 return data; /* Leave LE untouched */
295 #endif /* __ARM64_KVM_EMULATE_H__ */