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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2015 - ARM Ltd
* Author: Marc Zyngier <marc.zyngier@arm.com>
*/
#ifndef __ARM64_KVM_HYP_DEBUG_SR_H__
#define __ARM64_KVM_HYP_DEBUG_SR_H__
#include <linux/compiler.h>
#include <linux/kvm_host.h>
#include <asm/debug-monitors.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_hyp.h>
#include <asm/kvm_mmu.h>
#define read_debug(r,n) read_sysreg(r##n##_el1)
#define write_debug(v,r,n) write_sysreg(v, r##n##_el1)
#define save_debug(ptr,reg,nr) \
switch (nr) { \
case 15: ptr[15] = read_debug(reg, 15); \
/* Fall through */ \
case 14: ptr[14] = read_debug(reg, 14); \
/* Fall through */ \
case 13: ptr[13] = read_debug(reg, 13); \
/* Fall through */ \
case 12: ptr[12] = read_debug(reg, 12); \
/* Fall through */ \
case 11: ptr[11] = read_debug(reg, 11); \
/* Fall through */ \
case 10: ptr[10] = read_debug(reg, 10); \
/* Fall through */ \
case 9: ptr[9] = read_debug(reg, 9); \
/* Fall through */ \
case 8: ptr[8] = read_debug(reg, 8); \
/* Fall through */ \
case 7: ptr[7] = read_debug(reg, 7); \
/* Fall through */ \
case 6: ptr[6] = read_debug(reg, 6); \
/* Fall through */ \
case 5: ptr[5] = read_debug(reg, 5); \
/* Fall through */ \
case 4: ptr[4] = read_debug(reg, 4); \
/* Fall through */ \
case 3: ptr[3] = read_debug(reg, 3); \
/* Fall through */ \
case 2: ptr[2] = read_debug(reg, 2); \
/* Fall through */ \
case 1: ptr[1] = read_debug(reg, 1); \
/* Fall through */ \
default: ptr[0] = read_debug(reg, 0); \
}
#define restore_debug(ptr,reg,nr) \
switch (nr) { \
case 15: write_debug(ptr[15], reg, 15); \
/* Fall through */ \
case 14: write_debug(ptr[14], reg, 14); \
/* Fall through */ \
case 13: write_debug(ptr[13], reg, 13); \
/* Fall through */ \
case 12: write_debug(ptr[12], reg, 12); \
/* Fall through */ \
case 11: write_debug(ptr[11], reg, 11); \
/* Fall through */ \
case 10: write_debug(ptr[10], reg, 10); \
/* Fall through */ \
case 9: write_debug(ptr[9], reg, 9); \
/* Fall through */ \
case 8: write_debug(ptr[8], reg, 8); \
/* Fall through */ \
case 7: write_debug(ptr[7], reg, 7); \
/* Fall through */ \
case 6: write_debug(ptr[6], reg, 6); \
/* Fall through */ \
case 5: write_debug(ptr[5], reg, 5); \
/* Fall through */ \
case 4: write_debug(ptr[4], reg, 4); \
/* Fall through */ \
case 3: write_debug(ptr[3], reg, 3); \
/* Fall through */ \
case 2: write_debug(ptr[2], reg, 2); \
/* Fall through */ \
case 1: write_debug(ptr[1], reg, 1); \
/* Fall through */ \
default: write_debug(ptr[0], reg, 0); \
}
static inline void __debug_save_state(struct kvm_vcpu *vcpu,
struct kvm_guest_debug_arch *dbg,
struct kvm_cpu_context *ctxt)
{
u64 aa64dfr0;
int brps, wrps;
aa64dfr0 = read_sysreg(id_aa64dfr0_el1);
brps = (aa64dfr0 >> 12) & 0xf;
wrps = (aa64dfr0 >> 20) & 0xf;
save_debug(dbg->dbg_bcr, dbgbcr, brps);
save_debug(dbg->dbg_bvr, dbgbvr, brps);
save_debug(dbg->dbg_wcr, dbgwcr, wrps);
save_debug(dbg->dbg_wvr, dbgwvr, wrps);
ctxt->sys_regs[MDCCINT_EL1] = read_sysreg(mdccint_el1);
}
static inline void __debug_restore_state(struct kvm_vcpu *vcpu,
struct kvm_guest_debug_arch *dbg,
struct kvm_cpu_context *ctxt)
{
u64 aa64dfr0;
int brps, wrps;
aa64dfr0 = read_sysreg(id_aa64dfr0_el1);
brps = (aa64dfr0 >> 12) & 0xf;
wrps = (aa64dfr0 >> 20) & 0xf;
restore_debug(dbg->dbg_bcr, dbgbcr, brps);
restore_debug(dbg->dbg_bvr, dbgbvr, brps);
restore_debug(dbg->dbg_wcr, dbgwcr, wrps);
restore_debug(dbg->dbg_wvr, dbgwvr, wrps);
write_sysreg(ctxt->sys_regs[MDCCINT_EL1], mdccint_el1);
}
static inline void __debug_switch_to_guest_common(struct kvm_vcpu *vcpu)
{
struct kvm_cpu_context *host_ctxt;
struct kvm_cpu_context *guest_ctxt;
struct kvm_guest_debug_arch *host_dbg;
struct kvm_guest_debug_arch *guest_dbg;
if (!(vcpu->arch.flags & KVM_ARM64_DEBUG_DIRTY))
return;
host_ctxt = &__hyp_this_cpu_ptr(kvm_host_data)->host_ctxt;
guest_ctxt = &vcpu->arch.ctxt;
host_dbg = &vcpu->arch.host_debug_state.regs;
guest_dbg = kern_hyp_va(vcpu->arch.debug_ptr);
__debug_save_state(vcpu, host_dbg, host_ctxt);
__debug_restore_state(vcpu, guest_dbg, guest_ctxt);
}
static inline void __debug_switch_to_host_common(struct kvm_vcpu *vcpu)
{
struct kvm_cpu_context *host_ctxt;
struct kvm_cpu_context *guest_ctxt;
struct kvm_guest_debug_arch *host_dbg;
struct kvm_guest_debug_arch *guest_dbg;
if (!(vcpu->arch.flags & KVM_ARM64_DEBUG_DIRTY))
return;
host_ctxt = &__hyp_this_cpu_ptr(kvm_host_data)->host_ctxt;
guest_ctxt = &vcpu->arch.ctxt;
host_dbg = &vcpu->arch.host_debug_state.regs;
guest_dbg = kern_hyp_va(vcpu->arch.debug_ptr);
__debug_save_state(vcpu, guest_dbg, guest_ctxt);
__debug_restore_state(vcpu, host_dbg, host_ctxt);
vcpu->arch.flags &= ~KVM_ARM64_DEBUG_DIRTY;
}
#endif /* __ARM64_KVM_HYP_DEBUG_SR_H__ */
|
