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>
33 unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num);
34 unsigned long *vcpu_spsr32(const struct kvm_vcpu *vcpu);
36 bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
37 void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
39 void kvm_inject_undefined(struct kvm_vcpu *vcpu);
40 void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
41 void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
43 static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
45 vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS;
46 if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features))
47 vcpu->arch.hcr_el2 &= ~HCR_RW;
50 static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu)
52 return vcpu->arch.hcr_el2;
55 static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr)
57 vcpu->arch.hcr_el2 = hcr;
60 static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu)
62 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc;
65 static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu)
67 return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1;
70 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
72 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate;
75 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
77 return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT);
80 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
82 if (vcpu_mode_is_32bit(vcpu))
83 return kvm_condition_valid32(vcpu);
88 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
90 if (vcpu_mode_is_32bit(vcpu))
91 kvm_skip_instr32(vcpu, is_wide_instr);
96 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
98 *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT;
102 * vcpu_get_reg and vcpu_set_reg should always be passed a register number
103 * coming from a read of ESR_EL2. Otherwise, it may give the wrong result on
104 * AArch32 with banked registers.
106 static inline unsigned long vcpu_get_reg(const struct kvm_vcpu *vcpu,
109 return (reg_num == 31) ? 0 : vcpu_gp_regs(vcpu)->regs.regs[reg_num];
112 static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
116 vcpu_gp_regs(vcpu)->regs.regs[reg_num] = val;
119 /* Get vcpu SPSR for current mode */
120 static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu)
122 if (vcpu_mode_is_32bit(vcpu))
123 return vcpu_spsr32(vcpu);
125 return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1];
128 static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
130 u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
132 if (vcpu_mode_is_32bit(vcpu))
133 return mode > COMPAT_PSR_MODE_USR;
135 return mode != PSR_MODE_EL0t;
138 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
140 return vcpu->arch.fault.esr_el2;
143 static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu)
145 return vcpu->arch.fault.far_el2;
148 static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu)
150 return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8;
153 static inline u32 kvm_vcpu_hvc_get_imm(const struct kvm_vcpu *vcpu)
155 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_xVC_IMM_MASK;
158 static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu)
160 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_ISV);
163 static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu)
165 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WNR);
168 static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu)
170 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SSE);
173 static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu)
175 return (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SRT_MASK) >> ESR_ELx_SRT_SHIFT;
178 static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu)
180 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_EA);
183 static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu)
185 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_S1PTW);
188 static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu)
190 return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SAS) >> ESR_ELx_SAS_SHIFT);
193 /* This one is not specific to Data Abort */
194 static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu)
196 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_IL);
199 static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
201 return kvm_vcpu_get_hsr(vcpu) >> ESR_ELx_EC_SHIFT;
204 static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
206 return kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_IABT_LOW;
209 static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu)
211 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC;
214 static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu)
216 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC_TYPE;
219 static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
221 return vcpu_sys_reg(vcpu, MPIDR_EL1) & MPIDR_HWID_BITMASK;
224 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
226 if (vcpu_mode_is_32bit(vcpu))
227 *vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT;
229 vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25);
232 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
234 if (vcpu_mode_is_32bit(vcpu))
235 return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT);
237 return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25));
240 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
244 if (kvm_vcpu_is_be(vcpu)) {
249 return be16_to_cpu(data & 0xffff);
251 return be32_to_cpu(data & 0xffffffff);
253 return be64_to_cpu(data);
260 return le16_to_cpu(data & 0xffff);
262 return le32_to_cpu(data & 0xffffffff);
264 return le64_to_cpu(data);
268 return data; /* Leave LE untouched */
271 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
275 if (kvm_vcpu_is_be(vcpu)) {
280 return cpu_to_be16(data & 0xffff);
282 return cpu_to_be32(data & 0xffffffff);
284 return cpu_to_be64(data);
291 return cpu_to_le16(data & 0xffff);
293 return cpu_to_le32(data & 0xffffffff);
295 return cpu_to_le64(data);
299 return data; /* Leave LE untouched */
302 #endif /* __ARM64_KVM_EMULATE_H__ */