loongarch_vcpu 0.5.3

LoongArch VCPU implementation for ArceOS Hypervisor
Documentation 
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

.section .text

.macro SAVE_GUEST_REGS
    st.d    $r0, $sp, 0
    st.d    $r1, $sp, 8
    st.d    $r2, $sp, 16
    st.d    $r3, $sp, 24
    st.d    $r4, $sp, 32
    st.d    $r5, $sp, 40
    st.d    $r6, $sp, 48
    st.d    $r7, $sp, 56
    st.d    $r8, $sp, 64
    st.d    $r9, $sp, 72
    st.d    $r10, $sp, 80
    st.d    $r11, $sp, 88
    st.d    $r12, $sp, 96
    st.d    $r13, $sp, 104
    st.d    $r14, $sp, 112
    st.d    $r15, $sp, 120
    st.d    $r16, $sp, 128
    st.d    $r17, $sp, 136
    st.d    $r18, $sp, 144
    st.d    $r19, $sp, 152
    st.d    $r20, $sp, 160
    st.d    $r21, $sp, 168
    st.d    $r22, $sp, 176
    st.d    $r23, $sp, 184
    st.d    $r24, $sp, 192
    st.d    $r25, $sp, 200
    st.d    $r26, $sp, 208
    st.d    $r27, $sp, 216
    st.d    $r28, $sp, 224
    st.d    $r29, $sp, 232
    st.d    $r30, $sp, 240
    st.d    $r31, $sp, 248

    gcsrrd  $t0, 0x6
    st.d    $t0, $sp, 256
    gcsrrd  $t0, 0x0
    st.d    $t0, $sp, 264
    gcsrrd  $t0, 0x1
    st.d    $t0, $sp, 272
    gcsrrd  $t0, 0x5
    st.d    $t0, $sp, 280
.endm

.macro RESTORE_GUEST_REGS
    ld.d    $t0, $sp, 256
    gcsrwr  $t0, 0x6
    ld.d    $t0, $sp, 264
    gcsrwr  $t0, 0x0
    ld.d    $t0, $sp, 272
    gcsrwr  $t0, 0x1
    ld.d    $t0, $sp, 280
    gcsrwr  $t0, 0x5

    ld.d    $r1, $sp, 8
    ld.d    $r2, $sp, 16
    ld.d    $r3, $sp, 24
    ld.d    $r4, $sp, 32
    ld.d    $r5, $sp, 40
    ld.d    $r6, $sp, 48
    ld.d    $r7, $sp, 56
    ld.d    $r8, $sp, 64
    ld.d    $r9, $sp, 72
    ld.d    $r10, $sp, 80
    ld.d    $r11, $sp, 88
    ld.d    $r12, $sp, 96
    ld.d    $r13, $sp, 104
    ld.d    $r14, $sp, 112
    ld.d    $r15, $sp, 120
    ld.d    $r16, $sp, 128
    ld.d    $r17, $sp, 136
    ld.d    $r18, $sp, 144
    ld.d    $r19, $sp, 152
    ld.d    $r20, $sp, 160
    ld.d    $r21, $sp, 168
    ld.d    $r22, $sp, 176
    ld.d    $r23, $sp, 184
    ld.d    $r24, $sp, 192
    ld.d    $r25, $sp, 200
    ld.d    $r26, $sp, 208
    ld.d    $r27, $sp, 216
    ld.d    $r28, $sp, 224
    ld.d    $r29, $sp, 232
    ld.d    $r30, $sp, 240
    ld.d    $r31, $sp, 248
    ld.d    $r0, $sp, 0
.endm

.global _run_guest
_run_guest:
    move    $t1, $ra
    csrwr   $a0, 0x33
    move    $sp, $a0
    RESTORE_GUEST_REGS
    ertn
    jr      $t1

.global _guest_exit
_guest_exit:
    b       vmexit_trampoline

.section .vectors, "ax"
.align 12
.global _exception_vectors
_exception_vectors:
    .org 0x0
    b       _irq_handler_vector
    .org 0x80
    b       _sync_handler_vector
    .org 0x100
    b       _sync_handler_vector
    .org 0x180
    b       _sync_handler_vector
    .org 0x200
    b       _sync_handler_vector
    .org 0x280
    b       _sync_handler_vector
    .org 0x400
    b       _sync_handler_vector
    .org 0x480
    b       _sync_handler_vector
    .org 0x500
    b       _sync_handler_vector
    .org 0x580
    b       _sync_handler_vector
    .org 0x600
    b       _sync_handler_vector
    .org 0x680
    b       _sync_handler_vector
    .org 0x700
    b       _sync_handler_vector
    .org 0x780
    b       _sync_handler_vector
    .org 0x800
    b       _sync_handler_vector
    .org 0x880
    b       _sync_handler_vector
    .org 0x900
    b       _sync_handler_vector
    .org 0x980
    b       _sync_handler_vector
    .org 0xa00
    b       _sync_handler_vector
    .org 0xa80
    b       _sync_handler_vector
    .org 0xb00
    b       _hvc_handler_vector
    .org 0xb80
    b       _sync_handler_vector
    .org 0xc00
    b       _sync_handler_vector
    .org 0xc80
    b       _sync_handler_vector
    .org 0xd00
    b       _sync_handler_vector
    .org 0xd80
    b       _sync_handler_vector

_irq_handler_vector:
    csrrd   $sp, 0x33
    SAVE_GUEST_REGS
    li.d    $a0, 1
    b       _guest_exit

_sync_handler_vector:
    csrrd   $sp, 0x33
    SAVE_GUEST_REGS
    li.d    $a0, 0
    b       _guest_exit

_hvc_handler_vector:
    csrrd   $sp, 0x33
    SAVE_GUEST_REGS
    li.d    $a0, 0
    b       _guest_exit