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;
46 static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu)
48 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc;
51 static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu)
53 return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1;
56 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
58 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate;
61 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
63 return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT);
66 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
68 if (vcpu_mode_is_32bit(vcpu))
69 return kvm_condition_valid32(vcpu);
74 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
76 if (vcpu_mode_is_32bit(vcpu))
77 kvm_skip_instr32(vcpu, is_wide_instr);
82 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
84 *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT;
87 static inline unsigned long *vcpu_reg(const struct kvm_vcpu *vcpu, u8 reg_num)
89 if (vcpu_mode_is_32bit(vcpu))
90 return vcpu_reg32(vcpu, reg_num);
92 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.regs[reg_num];
95 /* Get vcpu SPSR for current mode */
96 static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu)
98 if (vcpu_mode_is_32bit(vcpu))
99 return vcpu_spsr32(vcpu);
101 return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1];
104 static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
106 u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
108 if (vcpu_mode_is_32bit(vcpu))
109 return mode > COMPAT_PSR_MODE_USR;
111 return mode != PSR_MODE_EL0t;
114 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
116 return vcpu->arch.fault.esr_el2;
119 static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu)
121 return vcpu->arch.fault.far_el2;
124 static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu)
126 return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8;
129 static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu)
131 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_ISV);
134 static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu)
136 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_WNR);
139 static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu)
141 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SSE);
144 static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu)
146 return (kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SRT_MASK) >> ESR_EL2_SRT_SHIFT;
149 static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu)
151 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_EA);
154 static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu)
156 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_S1PTW);
159 static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu)
161 return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SAS) >> ESR_EL2_SAS_SHIFT);
164 /* This one is not specific to Data Abort */
165 static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu)
167 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_IL);
170 static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
172 return kvm_vcpu_get_hsr(vcpu) >> ESR_EL2_EC_SHIFT;
175 static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
177 return kvm_vcpu_trap_get_class(vcpu) == ESR_EL2_EC_IABT;
180 static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu)
182 return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC;
185 static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu)
187 return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC_TYPE;
190 static inline unsigned long kvm_vcpu_get_mpidr(struct kvm_vcpu *vcpu)
192 return vcpu_sys_reg(vcpu, MPIDR_EL1);
195 static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
197 if (vcpu_mode_is_32bit(vcpu))
198 *vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT;
200 vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25);
203 static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
205 if (vcpu_mode_is_32bit(vcpu))
206 return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT);
208 return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25));
211 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
215 if (kvm_vcpu_is_be(vcpu)) {
220 return be16_to_cpu(data & 0xffff);
222 return be32_to_cpu(data & 0xffffffff);
224 return be64_to_cpu(data);
231 return le16_to_cpu(data & 0xffff);
233 return le32_to_cpu(data & 0xffffffff);
235 return le64_to_cpu(data);
239 return data; /* Leave LE untouched */
242 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
246 if (kvm_vcpu_is_be(vcpu)) {
251 return cpu_to_be16(data & 0xffff);
253 return cpu_to_be32(data & 0xffffffff);
255 return cpu_to_be64(data);
262 return cpu_to_le16(data & 0xffff);
264 return cpu_to_le32(data & 0xffffffff);
266 return cpu_to_le64(data);
270 return data; /* Leave LE untouched */
273 #endif /* __ARM64_KVM_EMULATE_H__ */