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
;
44 if (test_bit(KVM_ARM_VCPU_EL1_32BIT
, vcpu
->arch
.features
))
45 vcpu
->arch
.hcr_el2
&= ~HCR_RW
;
48 static inline unsigned long vcpu_get_hcr(struct kvm_vcpu
*vcpu
)
50 return vcpu
->arch
.hcr_el2
;
53 static inline void vcpu_set_hcr(struct kvm_vcpu
*vcpu
, unsigned long hcr
)
55 vcpu
->arch
.hcr_el2
= hcr
;
58 static inline unsigned long *vcpu_pc(const struct kvm_vcpu
*vcpu
)
60 return (unsigned long *)&vcpu_gp_regs(vcpu
)->regs
.pc
;
63 static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu
*vcpu
)
65 return (unsigned long *)&vcpu_gp_regs(vcpu
)->elr_el1
;
68 static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu
*vcpu
)
70 return (unsigned long *)&vcpu_gp_regs(vcpu
)->regs
.pstate
;
73 static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu
*vcpu
)
75 return !!(*vcpu_cpsr(vcpu
) & PSR_MODE32_BIT
);
78 static inline bool kvm_condition_valid(const struct kvm_vcpu
*vcpu
)
80 if (vcpu_mode_is_32bit(vcpu
))
81 return kvm_condition_valid32(vcpu
);
86 static inline void kvm_skip_instr(struct kvm_vcpu
*vcpu
, bool is_wide_instr
)
88 if (vcpu_mode_is_32bit(vcpu
))
89 kvm_skip_instr32(vcpu
, is_wide_instr
);
94 static inline void vcpu_set_thumb(struct kvm_vcpu
*vcpu
)
96 *vcpu_cpsr(vcpu
) |= COMPAT_PSR_T_BIT
;
99 static inline unsigned long *vcpu_reg(const struct kvm_vcpu
*vcpu
, u8 reg_num
)
101 if (vcpu_mode_is_32bit(vcpu
))
102 return vcpu_reg32(vcpu
, reg_num
);
104 return (unsigned long *)&vcpu_gp_regs(vcpu
)->regs
.regs
[reg_num
];
107 /* Get vcpu SPSR for current mode */
108 static inline unsigned long *vcpu_spsr(const struct kvm_vcpu
*vcpu
)
110 if (vcpu_mode_is_32bit(vcpu
))
111 return vcpu_spsr32(vcpu
);
113 return (unsigned long *)&vcpu_gp_regs(vcpu
)->spsr
[KVM_SPSR_EL1
];
116 static inline bool vcpu_mode_priv(const struct kvm_vcpu
*vcpu
)
118 u32 mode
= *vcpu_cpsr(vcpu
) & PSR_MODE_MASK
;
120 if (vcpu_mode_is_32bit(vcpu
))
121 return mode
> COMPAT_PSR_MODE_USR
;
123 return mode
!= PSR_MODE_EL0t
;
126 static inline u32
kvm_vcpu_get_hsr(const struct kvm_vcpu
*vcpu
)
128 return vcpu
->arch
.fault
.esr_el2
;
131 static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu
*vcpu
)
133 return vcpu
->arch
.fault
.far_el2
;
136 static inline phys_addr_t
kvm_vcpu_get_fault_ipa(const struct kvm_vcpu
*vcpu
)
138 return ((phys_addr_t
)vcpu
->arch
.fault
.hpfar_el2
& HPFAR_MASK
) << 8;
141 static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu
*vcpu
)
143 return !!(kvm_vcpu_get_hsr(vcpu
) & ESR_EL2_ISV
);
146 static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu
*vcpu
)
148 return !!(kvm_vcpu_get_hsr(vcpu
) & ESR_EL2_WNR
);
151 static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu
*vcpu
)
153 return !!(kvm_vcpu_get_hsr(vcpu
) & ESR_EL2_SSE
);
156 static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu
*vcpu
)
158 return (kvm_vcpu_get_hsr(vcpu
) & ESR_EL2_SRT_MASK
) >> ESR_EL2_SRT_SHIFT
;
161 static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu
*vcpu
)
163 return !!(kvm_vcpu_get_hsr(vcpu
) & ESR_EL2_EA
);
166 static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu
*vcpu
)
168 return !!(kvm_vcpu_get_hsr(vcpu
) & ESR_EL2_S1PTW
);
171 static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu
*vcpu
)
173 return 1 << ((kvm_vcpu_get_hsr(vcpu
) & ESR_EL2_SAS
) >> ESR_EL2_SAS_SHIFT
);
176 /* This one is not specific to Data Abort */
177 static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu
*vcpu
)
179 return !!(kvm_vcpu_get_hsr(vcpu
) & ESR_EL2_IL
);
182 static inline u8
kvm_vcpu_trap_get_class(const struct kvm_vcpu
*vcpu
)
184 return kvm_vcpu_get_hsr(vcpu
) >> ESR_EL2_EC_SHIFT
;
187 static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu
*vcpu
)
189 return kvm_vcpu_trap_get_class(vcpu
) == ESR_EL2_EC_IABT
;
192 static inline u8
kvm_vcpu_trap_get_fault(const struct kvm_vcpu
*vcpu
)
194 return kvm_vcpu_get_hsr(vcpu
) & ESR_EL2_FSC
;
197 static inline u8
kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu
*vcpu
)
199 return kvm_vcpu_get_hsr(vcpu
) & ESR_EL2_FSC_TYPE
;
202 static inline unsigned long kvm_vcpu_get_mpidr(struct kvm_vcpu
*vcpu
)
204 return vcpu_sys_reg(vcpu
, MPIDR_EL1
);
207 static inline void kvm_vcpu_set_be(struct kvm_vcpu
*vcpu
)
209 if (vcpu_mode_is_32bit(vcpu
))
210 *vcpu_cpsr(vcpu
) |= COMPAT_PSR_E_BIT
;
212 vcpu_sys_reg(vcpu
, SCTLR_EL1
) |= (1 << 25);
215 static inline bool kvm_vcpu_is_be(struct kvm_vcpu
*vcpu
)
217 if (vcpu_mode_is_32bit(vcpu
))
218 return !!(*vcpu_cpsr(vcpu
) & COMPAT_PSR_E_BIT
);
220 return !!(vcpu_sys_reg(vcpu
, SCTLR_EL1
) & (1 << 25));
223 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu
*vcpu
,
227 if (kvm_vcpu_is_be(vcpu
)) {
232 return be16_to_cpu(data
& 0xffff);
234 return be32_to_cpu(data
& 0xffffffff);
236 return be64_to_cpu(data
);
243 return le16_to_cpu(data
& 0xffff);
245 return le32_to_cpu(data
& 0xffffffff);
247 return le64_to_cpu(data
);
251 return data
; /* Leave LE untouched */
254 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu
*vcpu
,
258 if (kvm_vcpu_is_be(vcpu
)) {
263 return cpu_to_be16(data
& 0xffff);
265 return cpu_to_be32(data
& 0xffffffff);
267 return cpu_to_be64(data
);
274 return cpu_to_le16(data
& 0xffff);
276 return cpu_to_le32(data
& 0xffffffff);
278 return cpu_to_le64(data
);
282 return data
; /* Leave LE untouched */
285 #endif /* __ARM64_KVM_EMULATE_H__ */
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