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 void kvm_inject_undefined(struct kvm_vcpu *vcpu);
35 void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
36 void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
38 static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu)
40 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc;
43 static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu)
45 return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1;
48 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
50 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate;
53 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
55 return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT);
58 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
60 return true; /* No conditionals on arm64 */
63 static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
68 static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
70 *vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT;
73 static inline unsigned long *vcpu_reg(const struct kvm_vcpu *vcpu, u8 reg_num)
75 if (vcpu_mode_is_32bit(vcpu))
76 return vcpu_reg32(vcpu, reg_num);
78 return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.regs[reg_num];
81 /* Get vcpu SPSR for current mode */
82 static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu)
84 if (vcpu_mode_is_32bit(vcpu))
85 return vcpu_spsr32(vcpu);
87 return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1];
90 static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
92 u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;
94 if (vcpu_mode_is_32bit(vcpu))
95 return mode > COMPAT_PSR_MODE_USR;
97 return mode != PSR_MODE_EL0t;
100 static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
102 return vcpu->arch.fault.esr_el2;
105 static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu)
107 return vcpu->arch.fault.far_el2;
110 static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu)
112 return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8;
115 static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu)
117 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_ISV);
120 static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu)
122 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_WNR);
125 static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu)
127 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SSE);
130 static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu)
132 return (kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SRT_MASK) >> ESR_EL2_SRT_SHIFT;
135 static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu)
137 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_EA);
140 static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu)
142 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_S1PTW);
145 static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu)
147 return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_EL2_SAS) >> ESR_EL2_SAS_SHIFT);
150 /* This one is not specific to Data Abort */
151 static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu)
153 return !!(kvm_vcpu_get_hsr(vcpu) & ESR_EL2_IL);
156 static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
158 return kvm_vcpu_get_hsr(vcpu) >> ESR_EL2_EC_SHIFT;
161 static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
163 return kvm_vcpu_trap_get_class(vcpu) == ESR_EL2_EC_IABT;
166 static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu)
168 return kvm_vcpu_get_hsr(vcpu) & ESR_EL2_FSC_TYPE;
171 #endif /* __ARM64_KVM_EMULATE_H__ */