summaryrefslogtreecommitdiff
path: root/arch/arm64/include/asm/kvm_emulate.h
blob: 17e92f05b1fe597ea1c4e833debf7541be0fde79 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
/*
 * Copyright (C) 2012,2013 - ARM Ltd
 * Author: Marc Zyngier <marc.zyngier@arm.com>
 *
 * Derived from arch/arm/include/kvm_emulate.h
 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __ARM64_KVM_EMULATE_H__
#define __ARM64_KVM_EMULATE_H__

#include <linux/kvm_host.h>

#include <asm/esr.h>
#include <asm/kvm_arm.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_mmio.h>
#include <asm/ptrace.h>
#include <asm/cputype.h>

unsigned long *vcpu_reg32(const struct kvm_vcpu *vcpu, u8 reg_num);
unsigned long *vcpu_spsr32(const struct kvm_vcpu *vcpu);

bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);

void kvm_inject_undefined(struct kvm_vcpu *vcpu);
void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);

static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
{
	vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS;
	if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features))
		vcpu->arch.hcr_el2 &= ~HCR_RW;
}

static inline unsigned long vcpu_get_hcr(struct kvm_vcpu *vcpu)
{
	return vcpu->arch.hcr_el2;
}

static inline void vcpu_set_hcr(struct kvm_vcpu *vcpu, unsigned long hcr)
{
	vcpu->arch.hcr_el2 = hcr;
}

static inline unsigned long *vcpu_pc(const struct kvm_vcpu *vcpu)
{
	return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pc;
}

static inline unsigned long *vcpu_elr_el1(const struct kvm_vcpu *vcpu)
{
	return (unsigned long *)&vcpu_gp_regs(vcpu)->elr_el1;
}

static inline unsigned long *vcpu_cpsr(const struct kvm_vcpu *vcpu)
{
	return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.pstate;
}

static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
{
	return !!(*vcpu_cpsr(vcpu) & PSR_MODE32_BIT);
}

static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
{
	if (vcpu_mode_is_32bit(vcpu))
		return kvm_condition_valid32(vcpu);

	return true;
}

static inline void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr)
{
	if (vcpu_mode_is_32bit(vcpu))
		kvm_skip_instr32(vcpu, is_wide_instr);
	else
		*vcpu_pc(vcpu) += 4;
}

static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
{
	*vcpu_cpsr(vcpu) |= COMPAT_PSR_T_BIT;
}

static inline unsigned long *vcpu_reg(const struct kvm_vcpu *vcpu, u8 reg_num)
{
	if (vcpu_mode_is_32bit(vcpu))
		return vcpu_reg32(vcpu, reg_num);

	return (unsigned long *)&vcpu_gp_regs(vcpu)->regs.regs[reg_num];
}

/* Get vcpu SPSR for current mode */
static inline unsigned long *vcpu_spsr(const struct kvm_vcpu *vcpu)
{
	if (vcpu_mode_is_32bit(vcpu))
		return vcpu_spsr32(vcpu);

	return (unsigned long *)&vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1];
}

static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
{
	u32 mode = *vcpu_cpsr(vcpu) & PSR_MODE_MASK;

	if (vcpu_mode_is_32bit(vcpu))
		return mode > COMPAT_PSR_MODE_USR;

	return mode != PSR_MODE_EL0t;
}

static inline u32 kvm_vcpu_get_hsr(const struct kvm_vcpu *vcpu)
{
	return vcpu->arch.fault.esr_el2;
}

static inline unsigned long kvm_vcpu_get_hfar(const struct kvm_vcpu *vcpu)
{
	return vcpu->arch.fault.far_el2;
}

static inline phys_addr_t kvm_vcpu_get_fault_ipa(const struct kvm_vcpu *vcpu)
{
	return ((phys_addr_t)vcpu->arch.fault.hpfar_el2 & HPFAR_MASK) << 8;
}

static inline u32 kvm_vcpu_hvc_get_imm(const struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_xVC_IMM_MASK;
}

static inline bool kvm_vcpu_dabt_isvalid(const struct kvm_vcpu *vcpu)
{
	return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_ISV);
}

static inline bool kvm_vcpu_dabt_iswrite(const struct kvm_vcpu *vcpu)
{
	return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_WNR);
}

static inline bool kvm_vcpu_dabt_issext(const struct kvm_vcpu *vcpu)
{
	return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SSE);
}

static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu)
{
	return (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SRT_MASK) >> ESR_ELx_SRT_SHIFT;
}

static inline bool kvm_vcpu_dabt_isextabt(const struct kvm_vcpu *vcpu)
{
	return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_EA);
}

static inline bool kvm_vcpu_dabt_iss1tw(const struct kvm_vcpu *vcpu)
{
	return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_S1PTW);
}

static inline int kvm_vcpu_dabt_get_as(const struct kvm_vcpu *vcpu)
{
	return 1 << ((kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SAS) >> ESR_ELx_SAS_SHIFT);
}

/* This one is not specific to Data Abort */
static inline bool kvm_vcpu_trap_il_is32bit(const struct kvm_vcpu *vcpu)
{
	return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_IL);
}

static inline u8 kvm_vcpu_trap_get_class(const struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_get_hsr(vcpu) >> ESR_ELx_EC_SHIFT;
}

static inline bool kvm_vcpu_trap_is_iabt(const struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_trap_get_class(vcpu) == ESR_ELx_EC_IABT_LOW;
}

static inline u8 kvm_vcpu_trap_get_fault(const struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC;
}

static inline u8 kvm_vcpu_trap_get_fault_type(const struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_get_hsr(vcpu) & ESR_ELx_FSC_TYPE;
}

static inline unsigned long kvm_vcpu_get_mpidr_aff(struct kvm_vcpu *vcpu)
{
	return vcpu_sys_reg(vcpu, MPIDR_EL1) & MPIDR_HWID_BITMASK;
}

static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
{
	if (vcpu_mode_is_32bit(vcpu))
		*vcpu_cpsr(vcpu) |= COMPAT_PSR_E_BIT;
	else
		vcpu_sys_reg(vcpu, SCTLR_EL1) |= (1 << 25);
}

static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
{
	if (vcpu_mode_is_32bit(vcpu))
		return !!(*vcpu_cpsr(vcpu) & COMPAT_PSR_E_BIT);

	return !!(vcpu_sys_reg(vcpu, SCTLR_EL1) & (1 << 25));
}

static inline unsigned long vcpu_data_guest_to_host(struct kvm_vcpu *vcpu,
						    unsigned long data,
						    unsigned int len)
{
	if (kvm_vcpu_is_be(vcpu)) {
		switch (len) {
		case 1:
			return data & 0xff;
		case 2:
			return be16_to_cpu(data & 0xffff);
		case 4:
			return be32_to_cpu(data & 0xffffffff);
		default:
			return be64_to_cpu(data);
		}
	} else {
		switch (len) {
		case 1:
			return data & 0xff;
		case 2:
			return le16_to_cpu(data & 0xffff);
		case 4:
			return le32_to_cpu(data & 0xffffffff);
		default:
			return le64_to_cpu(data);
		}
	}

	return data;		/* Leave LE untouched */
}

static inline unsigned long vcpu_data_host_to_guest(struct kvm_vcpu *vcpu,
						    unsigned long data,
						    unsigned int len)
{
	if (kvm_vcpu_is_be(vcpu)) {
		switch (len) {
		case 1:
			return data & 0xff;
		case 2:
			return cpu_to_be16(data & 0xffff);
		case 4:
			return cpu_to_be32(data & 0xffffffff);
		default:
			return cpu_to_be64(data);
		}
	} else {
		switch (len) {
		case 1:
			return data & 0xff;
		case 2:
			return cpu_to_le16(data & 0xffff);
		case 4:
			return cpu_to_le32(data & 0xffffffff);
		default:
			return cpu_to_le64(data);
		}
	}

	return data;		/* Leave LE untouched */
}

#endif /* __ARM64_KVM_EMULATE_H__ */