2 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
3 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2, as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 #ifndef __ARM_KVM_EMULATE_H__
20 #define __ARM_KVM_EMULATE_H__
22 #include <linux/kvm_host.h>
23 #include <asm/kvm_asm.h>
24 #include <asm/kvm_mmio.h>
25 #include <asm/kvm_arm.h>
27 unsigned long *vcpu_reg(struct kvm_vcpu
*vcpu
, u8 reg_num
);
28 unsigned long *vcpu_spsr(struct kvm_vcpu
*vcpu
);
30 bool kvm_condition_valid(struct kvm_vcpu
*vcpu
);
31 void kvm_skip_instr(struct kvm_vcpu
*vcpu
, bool is_wide_instr
);
32 void kvm_inject_undefined(struct kvm_vcpu
*vcpu
);
33 void kvm_inject_dabt(struct kvm_vcpu
*vcpu
, unsigned long addr
);
34 void kvm_inject_pabt(struct kvm_vcpu
*vcpu
, unsigned long addr
);
36 static inline void vcpu_reset_hcr(struct kvm_vcpu
*vcpu
)
38 vcpu
->arch
.hcr
= HCR_GUEST_MASK
;
41 static inline bool vcpu_mode_is_32bit(struct kvm_vcpu
*vcpu
)
46 static inline unsigned long *vcpu_pc(struct kvm_vcpu
*vcpu
)
48 return &vcpu
->arch
.regs
.usr_regs
.ARM_pc
;
51 static inline unsigned long *vcpu_cpsr(struct kvm_vcpu
*vcpu
)
53 return &vcpu
->arch
.regs
.usr_regs
.ARM_cpsr
;
56 static inline void vcpu_set_thumb(struct kvm_vcpu
*vcpu
)
58 *vcpu_cpsr(vcpu
) |= PSR_T_BIT
;
61 static inline bool mode_has_spsr(struct kvm_vcpu
*vcpu
)
63 unsigned long cpsr_mode
= vcpu
->arch
.regs
.usr_regs
.ARM_cpsr
& MODE_MASK
;
64 return (cpsr_mode
> USR_MODE
&& cpsr_mode
< SYSTEM_MODE
);
67 static inline bool vcpu_mode_priv(struct kvm_vcpu
*vcpu
)
69 unsigned long cpsr_mode
= vcpu
->arch
.regs
.usr_regs
.ARM_cpsr
& MODE_MASK
;
70 return cpsr_mode
> USR_MODE
;;
73 static inline u32
kvm_vcpu_get_hsr(struct kvm_vcpu
*vcpu
)
75 return vcpu
->arch
.fault
.hsr
;
78 static inline unsigned long kvm_vcpu_get_hfar(struct kvm_vcpu
*vcpu
)
80 return vcpu
->arch
.fault
.hxfar
;
83 static inline phys_addr_t
kvm_vcpu_get_fault_ipa(struct kvm_vcpu
*vcpu
)
85 return ((phys_addr_t
)vcpu
->arch
.fault
.hpfar
& HPFAR_MASK
) << 8;
88 static inline unsigned long kvm_vcpu_get_hyp_pc(struct kvm_vcpu
*vcpu
)
90 return vcpu
->arch
.fault
.hyp_pc
;
93 static inline bool kvm_vcpu_dabt_isvalid(struct kvm_vcpu
*vcpu
)
95 return kvm_vcpu_get_hsr(vcpu
) & HSR_ISV
;
98 static inline bool kvm_vcpu_dabt_iswrite(struct kvm_vcpu
*vcpu
)
100 return kvm_vcpu_get_hsr(vcpu
) & HSR_WNR
;
103 static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu
*vcpu
)
105 return kvm_vcpu_get_hsr(vcpu
) & HSR_SSE
;
108 static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu
*vcpu
)
110 return (kvm_vcpu_get_hsr(vcpu
) & HSR_SRT_MASK
) >> HSR_SRT_SHIFT
;
113 static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu
*vcpu
)
115 return kvm_vcpu_get_hsr(vcpu
) & HSR_DABT_EA
;
118 static inline bool kvm_vcpu_dabt_iss1tw(struct kvm_vcpu
*vcpu
)
120 return kvm_vcpu_get_hsr(vcpu
) & HSR_DABT_S1PTW
;
123 /* Get Access Size from a data abort */
124 static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu
*vcpu
)
126 switch ((kvm_vcpu_get_hsr(vcpu
) >> 22) & 0x3) {
134 kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
139 /* This one is not specific to Data Abort */
140 static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu
*vcpu
)
142 return kvm_vcpu_get_hsr(vcpu
) & HSR_IL
;
145 static inline u8
kvm_vcpu_trap_get_class(struct kvm_vcpu
*vcpu
)
147 return kvm_vcpu_get_hsr(vcpu
) >> HSR_EC_SHIFT
;
150 static inline bool kvm_vcpu_trap_is_iabt(struct kvm_vcpu
*vcpu
)
152 return kvm_vcpu_trap_get_class(vcpu
) == HSR_EC_IABT
;
155 static inline u8
kvm_vcpu_trap_get_fault(struct kvm_vcpu
*vcpu
)
157 return kvm_vcpu_get_hsr(vcpu
) & HSR_FSC
;
160 static inline u8
kvm_vcpu_trap_get_fault_type(struct kvm_vcpu
*vcpu
)
162 return kvm_vcpu_get_hsr(vcpu
) & HSR_FSC_TYPE
;
165 static inline u32
kvm_vcpu_hvc_get_imm(struct kvm_vcpu
*vcpu
)
167 return kvm_vcpu_get_hsr(vcpu
) & HSR_HVC_IMM_MASK
;
170 static inline unsigned long kvm_vcpu_get_mpidr(struct kvm_vcpu
*vcpu
)
172 return vcpu
->arch
.cp15
[c0_MPIDR
];
175 static inline void kvm_vcpu_set_be(struct kvm_vcpu
*vcpu
)
177 *vcpu_cpsr(vcpu
) |= PSR_E_BIT
;
180 static inline bool kvm_vcpu_is_be(struct kvm_vcpu
*vcpu
)
182 return !!(*vcpu_cpsr(vcpu
) & PSR_E_BIT
);
185 static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu
*vcpu
,
189 if (kvm_vcpu_is_be(vcpu
)) {
194 return be16_to_cpu(data
& 0xffff);
196 return be32_to_cpu(data
);
203 return le16_to_cpu(data
& 0xffff);
205 return le32_to_cpu(data
);
210 static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu
*vcpu
,
214 if (kvm_vcpu_is_be(vcpu
)) {
219 return cpu_to_be16(data
& 0xffff);
221 return cpu_to_be32(data
);
228 return cpu_to_le16(data
& 0xffff);
230 return cpu_to_le32(data
);
235 #endif /* __ARM_KVM_EMULATE_H__ */
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