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_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 (is_kernel_in_hyp_mode())
48 vcpu->arch.hcr_el2 |= HCR_E2H;
49 if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features))
50 vcpu->arch.hcr_el2 &= ~HCR_RW;
53 static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu)
55 return vcpu->arch.hcr_el2;
58 static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr)
60 vcpu->arch.hcr_el2 = hcr;
63 static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu)
65 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc;
68 static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu)
70 return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1;
73 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
75 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate;
78 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
80 return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT);
83 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
85 if (vcpu_mode_is_32bit(vcpu))
86 return kvm_condition_valid32(vcpu);
91 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
93 if (vcpu_mode_is_32bit(vcpu))
94 kvm_skip_instr32(vcpu, is_wide_instr);
99 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
101 *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT;
105 * vcpu_get_reg and vcpu_set_reg should always be passed a register number
106 * coming from a read of ESR_EL2. Otherwise, it may give the wrong result on
107 * AArch32 with banked registers.
109 static inline unsigned long vcpu_get_reg(const struct kvm_vcpu *vcpu,
112 return (reg_num == 31) ? 0 : vcpu_gp_regs(vcpu)->regs.regs[reg_num];
115 static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
119 vcpu_gp_regs(vcpu)->regs.regs[reg_num] = val;
122 /* Get vcpu SPSR for current mode */
123 static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu)
125 if (vcpu_mode_is_32bit(vcpu))
126 return vcpu_spsr32(vcpu);
128 return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1];
131 static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
135 if (vcpu_mode_is_32bit(vcpu)) {
136 mode = *vcpu_cpsr(vcpu) & COMPAT_PSR_MODE_MASK;
137 return mode > COMPAT_PSR_MODE_USR;
140 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
142 return mode != PSR_MODE_EL0t;
145 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
147 return vcpu->arch.fault.esr_el2;
150 static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu)
152 return vcpu->arch.fault.far_el2;
155 static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu)
157 return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8;
160 static inline u32 kvm_vcpu_hvc_get_imm(const struct kvm_vcpu *vcpu)
162 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_xVC_IMM_MASK;
165 static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu)
167 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_ISV);
170 static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu)
172 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WNR);
175 static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu)
177 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SSE);
180 static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu)
182 return (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SRT_MASK) >> ESR_ELx_SRT_SHIFT;
185 static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu)
187 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_EA);
190 static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu)
192 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_S1PTW);
195 static inline bool kvm_vcpu_dabt_is_cm(const struct kvm_vcpu *vcpu)
197 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_CM);
200 static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu)
202 return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SAS) >> ESR_ELx_SAS_SHIFT);
205 /* This one is not specific to Data Abort */
206 static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu)
208 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_IL);
211 static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
213 return ESR_ELx_EC(kvm_vcpu_get_hsr(vcpu));
216 static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
218 return kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_IABT_LOW;
221 static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu)
223 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC;
226 static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu)
228 return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC_TYPE;
231 static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
233 return vcpu_sys_reg(vcpu, MPIDR_EL1) & MPIDR_HWID_BITMASK;
236 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
238 if (vcpu_mode_is_32bit(vcpu))
239 *vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT;
241 vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25);
244 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
246 if (vcpu_mode_is_32bit(vcpu))
247 return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT);
249 return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25));
252 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
256 if (kvm_vcpu_is_be(vcpu)) {
261 return be16_to_cpu(data & 0xffff);
263 return be32_to_cpu(data & 0xffffffff);
265 return be64_to_cpu(data);
272 return le16_to_cpu(data & 0xffff);
274 return le32_to_cpu(data & 0xffffffff);
276 return le64_to_cpu(data);
280 return data; /* Leave LE untouched */
283 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
287 if (kvm_vcpu_is_be(vcpu)) {
292 return cpu_to_be16(data & 0xffff);
294 return cpu_to_be32(data & 0xffffffff);
296 return cpu_to_be64(data);
303 return cpu_to_le16(data & 0xffff);
305 return cpu_to_le32(data & 0xffffffff);
307 return cpu_to_le64(data);
311 return data; /* Leave LE untouched */
314 #endif /* __ARM64_KVM_EMULATE_H__ */