summaryrefslogtreecommitdiff
path: root/arch/arm/include/asm/kvm_emulate.h
blob: e844b335e33a45cf8424610d0de50bfd0f3bba9b (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
/*
 * 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, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#ifndef __ARM_KVM_EMULATE_H__
#define __ARM_KVM_EMULATE_H__

#include <linux/kvm_host.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_mmio.h>
#include <asm/kvm_arm.h>

unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);
unsigned long *vcpu_spsr(struct kvm_vcpu *vcpu);

bool kvm_condition_valid(struct kvm_vcpu *vcpu);
void kvm_skip_instr(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 bool vcpu_mode_is_32bit(struct kvm_vcpu *vcpu)
{
	return 1;
}

static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
{
	return &vcpu->arch.regs.usr_regs.ARM_pc;
}

static inline unsigned long *vcpu_cpsr(struct kvm_vcpu *vcpu)
{
	return &vcpu->arch.regs.usr_regs.ARM_cpsr;
}

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

static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
{
	unsigned long cpsr_mode = vcpu->arch.regs.usr_regs.ARM_cpsr & MODE_MASK;
	return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
}

static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
{
	unsigned long cpsr_mode = vcpu->arch.regs.usr_regs.ARM_cpsr & MODE_MASK;
	return cpsr_mode > USR_MODE;;
}

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

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

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

static inline unsigned long kvm_vcpu_get_hyp_pc(struct kvm_vcpu *vcpu)
{
	return vcpu->arch.fault.hyp_pc;
}

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

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

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

static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
{
	return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
}

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

static inline bool kvm_vcpu_dabt_iss1tw(struct kvm_vcpu *vcpu)
{
	return kvm_vcpu_get_hsr(vcpu) & HSR_DABT_S1PTW;
}

/* Get Access Size from a data abort */
static inline int kvm_vcpu_dabt_get_as(struct kvm_vcpu *vcpu)
{
	switch ((kvm_vcpu_get_hsr(vcpu) >> 22) & 0x3) {
	case 0:
		return 1;
	case 1:
		return 2;
	case 2:
		return 4;
	default:
		kvm_err("Hardware is weird: SAS 0b11 is reserved\n");
		return -EFAULT;
	}
}

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

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

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

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

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

static inline void kvm_vcpu_set_be(struct kvm_vcpu *vcpu)
{
	*vcpu_cpsr(vcpu) |= PSR_E_BIT;
}

static inline bool kvm_vcpu_is_be(struct kvm_vcpu *vcpu)
{
	return !!(*vcpu_cpsr(vcpu) & PSR_E_BIT);
}

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);
		default:
			return be32_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);
		default:
			return cpu_to_be32(data);
		}
	}

	return data;		/* Leave LE untouched */
}

#endif /* __ARM_KVM_EMULATE_H__ */