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KVM: x86: SYSENTER emulation is broken
[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>
749cf76c 26
db730d8d
MZ		 27unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);
28unsigned long *vcpu_spsr(struct kvm_vcpu *vcpu);
749cf76c 29
c5997563 30bool kvm_condition_valid(struct kvm_vcpu *vcpu);
5b3e5e5b
CD		 31void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr);
32void kvm_inject_undefined(struct kvm_vcpu *vcpu);
33void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
34void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
35
b856a591
CD		 36static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
37{
38 vcpu->arch.hcr = HCR_GUEST_MASK;
39}
40
aa024c2f
MZ		 41static inline bool vcpu_mode_is_32bit(struct kvm_vcpu *vcpu)
42{
43 return 1;
44}
45
db730d8d 46static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
749cf76c 47{
db730d8d 48 return &vcpu->arch.regs.usr_regs.ARM_pc;
749cf76c
CD		 49}
50
db730d8d 51static inline unsigned long *vcpu_cpsr(struct kvm_vcpu *vcpu)
749cf76c 52{
db730d8d 53 return &vcpu->arch.regs.usr_regs.ARM_cpsr;
749cf76c
CD		 54}
55
aa024c2f
MZ		 56static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
57{
58 *vcpu_cpsr(vcpu) |= PSR_T_BIT;
59}
60
749cf76c
CD		 61static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
62{
63 unsigned long cpsr_mode = vcpu->arch.regs.usr_regs.ARM_cpsr & MODE_MASK;
64 return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
65}
66
67static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
68{
69 unsigned long cpsr_mode = vcpu->arch.regs.usr_regs.ARM_cpsr & MODE_MASK;
70 return cpsr_mode > USR_MODE;;
71}
72
7393b599
MZ		 73static inline u32 kvm_vcpu_get_hsr(struct kvm_vcpu *vcpu)
74{
75 return vcpu->arch.fault.hsr;
76}
77
78static inline unsigned long kvm_vcpu_get_hfar(struct kvm_vcpu *vcpu)
79{
80 return vcpu->arch.fault.hxfar;
81}
82
83static inline phys_addr_t kvm_vcpu_get_fault_ipa(struct kvm_vcpu *vcpu)
84{
85 return ((phys_addr_t)vcpu->arch.fault.hpfar & HPFAR_MASK) << 8;
86}
87
88static inline unsigned long kvm_vcpu_get_hyp_pc(struct kvm_vcpu *vcpu)
89{
90 return vcpu->arch.fault.hyp_pc;
91}
92
4a1df28a
MZ		 93static inline bool kvm_vcpu_dabt_isvalid(struct kvm_vcpu *vcpu)
94{
95 return kvm_vcpu_get_hsr(vcpu) & HSR_ISV;
96}
97
023cc964
MZ		 98static inline bool kvm_vcpu_dabt_iswrite(struct kvm_vcpu *vcpu)
99{
100 return kvm_vcpu_get_hsr(vcpu) & HSR_WNR;
101}
102
7c511b88
MZ		 103static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu *vcpu)
104{
105 return kvm_vcpu_get_hsr(vcpu) & HSR_SSE;
106}
107
d0adf747
MZ		 108static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
109{
110 return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
111}
112
78abfcde
MZ		 113static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
114{
115 return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_EA;
116}
117
b37670b0
MZ		 118static inline bool kvm_vcpu_dabt_iss1tw(struct kvm_vcpu *vcpu)
119{
120 return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW;
121}
122
a7123377
MZ		 123/* Get Access Size from a data abort */
124static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
125{
126 switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
127 case 0:
128 return 1;
129 case 1:
130 return 2;
131 case 2:
132 return 4;
133 default:
134 kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
135 return -EFAULT;
136 }
137}
138
23b415d6
MZ		 139/* This one is not specific to Data Abort */
140static inline bool kvm_vcpu_trap_il_is32bit(struct kvm_vcpu *vcpu)
141{
142 return kvm_vcpu_get_hsr(vcpu) & HSR_IL;
143}
144
4926d445
MZ		 145static inline u8 kvm_vcpu_trap_get_class(struct kvm_vcpu *vcpu)
146{
147 return kvm_vcpu_get_hsr(vcpu) >> HSR_EC_SHIFT;
148}
149
52d1dba9
MZ		 150static inline bool kvm_vcpu_trap_is_iabt(struct kvm_vcpu *vcpu)
151{
152 return kvm_vcpu_trap_get_class(vcpu) == HSR_EC_IABT;
153}
154
1cc287dd 155static inline u8 kvm_vcpu_trap_get_fault(struct kvm_vcpu *vcpu)
0496daa5
CD		 156{
157 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC;
158}
159
160static inline u8 kvm_vcpu_trap_get_fault_type(struct kvm_vcpu *vcpu)
1cc287dd
MZ		 161{
162 return kvm_vcpu_get_hsr(vcpu) & HSR_FSC_TYPE;
163}
164
c088f8f0
CD		 165static inline u32 kvm_vcpu_hvc_get_imm(struct kvm_vcpu *vcpu)
166{
167 return kvm_vcpu_get_hsr(vcpu) & HSR_HVC_IMM_MASK;
168}
169
79c64880
MZ		 170static inline unsigned long kvm_vcpu_get_mpidr(struct kvm_vcpu *vcpu)
171{
172 return vcpu->arch.cp15[c0_MPIDR];
173}
174
ce94fe93
MZ		 175static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
176{
177 *vcpu_cpsr(vcpu) |= PSR_E_BIT;
178}
179
6d89d2d9
MZ		 180static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
181{
182 return !!(*vcpu_cpsr(vcpu) & PSR_E_BIT);
183}
184
185static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
186 unsigned long data,
187 unsigned int len)
188{
189 if (kvm_vcpu_is_be(vcpu)) {
190 switch (len) {
191 case 1:
192 return data & 0xff;
193 case 2:
194 return be16_to_cpu(data & 0xffff);
195 default:
196 return be32_to_cpu(data);
197 }
27f194fd
VK		 198 } else {
199 switch (len) {
200 case 1:
201 return data & 0xff;
202 case 2:
203 return le16_to_cpu(data & 0xffff);
204 default:
205 return le32_to_cpu(data);
206 }
6d89d2d9 207 }
6d89d2d9
MZ		 208}
209
210static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
211 unsigned long data,
212 unsigned int len)
213{
214 if (kvm_vcpu_is_be(vcpu)) {
215 switch (len) {
216 case 1:
217 return data & 0xff;
218 case 2:
219 return cpu_to_be16(data & 0xffff);
220 default:
221 return cpu_to_be32(data);
222 }
27f194fd
VK		 223 } else {
224 switch (len) {
225 case 1:
226 return data & 0xff;
227 case 2:
228 return cpu_to_le16(data & 0xffff);
229 default:
230 return cpu_to_le32(data);
231 }
6d89d2d9 232 }
6d89d2d9
MZ		 233}
234
749cf76c 235#endif /* __ARM_KVM_EMULATE_H__ */
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