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[mirror_ubuntu-hirsute-kernel.git] / arch / arm / include / asm / kvm_emulate.h
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749cf76c
CD		 1/*
2 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
3 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
4 *
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.
8 *
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.
13 *
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.
17 */
18
19#ifndef __ARM_KVM_EMULATE_H__
20#define __ARM_KVM_EMULATE_H__
21
22#include <linux/kvm_host.h>
23#include <asm/kvm_asm.h>
45e96ea6 24#include <asm/kvm_mmio.h>
7393b599 25#include <asm/kvm_arm.h>
4429fc64 26#include <asm/cputype.h>
749cf76c 27
db730d8d
MZ		 28unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);
29unsigned long *vcpu_spsr(struct kvm_vcpu *vcpu);
749cf76c 30
bc45a516
PF		 31static inline unsigned long vcpu_get_reg(struct kvm_vcpu *vcpu,
32 u8 reg_num)
33{
34 return *vcpu_reg(vcpu, reg_num);
35}
36
37static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
38 unsigned long val)
39{
40 *vcpu_reg(vcpu, reg_num) = val;
41}
42
c5997563 43bool kvm_condition_valid(struct kvm_vcpu *vcpu);
5b3e5e5b
CD		 44void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr);
45void kvm_inject_undefined(struct kvm_vcpu *vcpu);
46void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
47void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
48
b856a591
CD		 49static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
50{
51 vcpu->arch.hcr = HCR_GUEST_MASK;
52}
53
3c1e7165
MZ		 54static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu)
55{
56 return vcpu->arch.hcr;
57}
58
59static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr)
60{
61 vcpu->arch.hcr = hcr;
62}
63
aa024c2f
MZ		 64static inline bool vcpu_mode_is_32bit(struct kvm_vcpu *vcpu)
65{
66 return 1;
67}
68
db730d8d 69static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
749cf76c 70{
db730d8d 71 return &vcpu->arch.regs.usr_regs.ARM_pc;
749cf76c
CD		 72}
73
db730d8d 74static inline unsigned long *vcpu_cpsr(struct kvm_vcpu *vcpu)
749cf76c 75{
db730d8d 76 return &vcpu->arch.regs.usr_regs.ARM_cpsr;
749cf76c
CD		 77}
78
aa024c2f
MZ		 79static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
80{
81 *vcpu_cpsr(vcpu) |= PSR_T_BIT;
82}
83
749cf76c
CD		 84static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
85{
86 unsigned long cpsr_mode = vcpu->arch.regs.usr_regs.ARM_cpsr & MODE_MASK;
87 return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
88}
89
90static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
91{
92 unsigned long cpsr_mode = vcpu->arch.regs.usr_regs.ARM_cpsr & MODE_MASK;
93 return cpsr_mode > USR_MODE;;
94}
95
7393b599
MZ		 96static inline u32 kvm_vcpu_get_hsr(struct kvm_vcpu *vcpu)
97{
98 return vcpu->arch.fault.hsr;
99}
100
101static inline unsigned long kvm_vcpu_get_hfar(struct kvm_vcpu *vcpu)
102{
103 return vcpu->arch.fault.hxfar;
104}
105
106static inline phys_addr_t kvm_vcpu_get_fault_ipa(struct kvm_vcpu *vcpu)
107{
108 return ((phys_addr_t)vcpu->arch.fault.hpfar & HPFAR_MASK) << 8;
109}
110
111static inline unsigned long kvm_vcpu_get_hyp_pc(struct kvm_vcpu *vcpu)
112{
113 return vcpu->arch.fault.hyp_pc;
114}
115
4a1df28a
MZ		 116static inline bool kvm_vcpu_dabt_isvalid(struct kvm_vcpu *vcpu)
117{
118 return kvm_vcpu_get_hsr(vcpu) & HSR_ISV;
119}
120
023cc964
MZ		 121static inline bool kvm_vcpu_dabt_iswrite(struct kvm_vcpu *vcpu)
122{
123 return kvm_vcpu_get_hsr(vcpu) & HSR_WNR;
124}
125
7c511b88
MZ		 126static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu *vcpu)
127{
128 return kvm_vcpu_get_hsr(vcpu) & HSR_SSE;
129}
130
d0adf747
MZ		 131static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
132{
133 return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
134}
135
78abfcde
MZ		 136static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
137{
138 return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_EA;
139}
140
b37670b0
MZ		 141static inline bool kvm_vcpu_dabt_iss1tw(struct kvm_vcpu *vcpu)
142{
143 return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW;
144}
145
a7123377
MZ		 146/* Get Access Size from a data abort */
147static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
148{
149 switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
150 case 0:
151 return 1;
152 case 1:
153 return 2;
154 case 2:
155 return 4;
156 default:
157 kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
158 return -EFAULT;
159 }
160}
161
23b415d6
MZ		 162/* This one is not specific to Data Abort */
163static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu *vcpu)
164{
165 return kvm_vcpu_get_hsr(vcpu) & HSR_IL;
166}
167
4926d445
MZ		 168static inline u8 kvm_vcpu_trap_get_class(struct kvm_vcpu *vcpu)
169{
170 return kvm_vcpu_get_hsr(vcpu) >> HSR_EC_SHIFT;
171}
172
52d1dba9
MZ		 173static inline bool kvm_vcpu_trap_is_iabt(struct kvm_vcpu *vcpu)
174{
175 return kvm_vcpu_trap_get_class(vcpu) == HSR_EC_IABT;
176}
177
1cc287dd 178static inline u8 kvm_vcpu_trap_get_fault(struct kvm_vcpu *vcpu)
0496daa5
CD		 179{
180 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC;
181}
182
183static inline u8 kvm_vcpu_trap_get_fault_type(struct kvm_vcpu *vcpu)
1cc287dd
MZ		 184{
185 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC_TYPE;
186}
187
c088f8f0
CD		 188static inline u32 kvm_vcpu_hvc_get_imm(struct kvm_vcpu *vcpu)
189{
190 return kvm_vcpu_get_hsr(vcpu) & HSR_HVC_IMM_MASK;
191}
192
4429fc64 193static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
79c64880 194{
4429fc64 195 return vcpu->arch.cp15[c0_MPIDR] & MPIDR_HWID_BITMASK;
79c64880
MZ		 196}
197
ce94fe93
MZ		 198static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
199{
200 *vcpu_cpsr(vcpu) |= PSR_E_BIT;
201}
202
6d89d2d9
MZ		 203static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
204{
205 return !!(*vcpu_cpsr(vcpu) & PSR_E_BIT);
206}
207
208static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
209 unsigned long data,
210 unsigned int len)
211{
212 if (kvm_vcpu_is_be(vcpu)) {
213 switch (len) {
214 case 1:
215 return data & 0xff;
216 case 2:
217 return be16_to_cpu(data & 0xffff);
218 default:
219 return be32_to_cpu(data);
220 }
27f194fd
VK		 221 } else {
222 switch (len) {
223 case 1:
224 return data & 0xff;
225 case 2:
226 return le16_to_cpu(data & 0xffff);
227 default:
228 return le32_to_cpu(data);
229 }
6d89d2d9 230 }
6d89d2d9
MZ		 231}
232
233static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
234 unsigned long data,
235 unsigned int len)
236{
237 if (kvm_vcpu_is_be(vcpu)) {
238 switch (len) {
239 case 1:
240 return data & 0xff;
241 case 2:
242 return cpu_to_be16(data & 0xffff);
243 default:
244 return cpu_to_be32(data);
245 }
27f194fd
VK		 246 } else {
247 switch (len) {
248 case 1:
249 return data & 0xff;
250 case 2:
251 return cpu_to_le16(data & 0xffff);
252 default:
253 return cpu_to_le32(data);
254 }
6d89d2d9 255 }
6d89d2d9
MZ		 256}
257
749cf76c 258#endif /* __ARM_KVM_EMULATE_H__ */
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