ax-cpu 0.10.0

Privileged instruction and structure abstractions for various CPU architectures
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

//! LVZ entry layout and final host stack restoration.

use core::mem::{offset_of, size_of};

use super::super::virtualization::{GuestContext, Vcpu};

core::arch::global_asm!(
    include_str!("walker.S"),
    include_str!("guest.S"),
    ctx_size = const size_of::<GuestContext>(),
    sepc = const offset_of!(GuestContext, sepc),
    gcsr_crmd = const offset_of!(GuestContext, gcsr_crmd),
    gcsr_prmd = const offset_of!(GuestContext, gcsr_prmd),
    gcsr_euen = const offset_of!(GuestContext, gcsr_euen),
    gcsr_misc = const offset_of!(GuestContext, gcsr_misc),
    gcsr_ectl = const offset_of!(GuestContext, gcsr_ectl),
    gcsr_estat = const offset_of!(GuestContext, gcsr_estat),
    gcsr_era = const offset_of!(GuestContext, gcsr_era),
    gcsr_badv = const offset_of!(GuestContext, gcsr_badv),
    gcsr_badi = const offset_of!(GuestContext, gcsr_badi),
    gcsr_eentry = const offset_of!(GuestContext, gcsr_eentry),
    gcsr_tlbidx = const offset_of!(GuestContext, gcsr_tlbidx),
    gcsr_tlbehi = const offset_of!(GuestContext, gcsr_tlbehi),
    gcsr_tlbelo0 = const offset_of!(GuestContext, gcsr_tlbelo0),
    gcsr_tlbelo1 = const offset_of!(GuestContext, gcsr_tlbelo1),
    gcsr_asid = const offset_of!(GuestContext, gcsr_asid),
    gcsr_pgdl = const offset_of!(GuestContext, gcsr_pgdl),
    gcsr_pgdh = const offset_of!(GuestContext, gcsr_pgdh),
    gcsr_pgd = const offset_of!(GuestContext, gcsr_pgd),
    gcsr_pwcl = const offset_of!(GuestContext, gcsr_pwcl),
    gcsr_pwch = const offset_of!(GuestContext, gcsr_pwch),
    gcsr_stlbps = const offset_of!(GuestContext, gcsr_stlbps),
    gcsr_ravcfg = const offset_of!(GuestContext, gcsr_ravcfg),
    gcsr_cpuid = const offset_of!(GuestContext, gcsr_cpuid),
    gcsr_prcfg1 = const offset_of!(GuestContext, gcsr_prcfg1),
    gcsr_prcfg2 = const offset_of!(GuestContext, gcsr_prcfg2),
    gcsr_prcfg3 = const offset_of!(GuestContext, gcsr_prcfg3),
    gcsr_save0 = const offset_of!(GuestContext, gcsr_save0),
    gcsr_save1 = const offset_of!(GuestContext, gcsr_save1),
    gcsr_save2 = const offset_of!(GuestContext, gcsr_save2),
    gcsr_save3 = const offset_of!(GuestContext, gcsr_save3),
    gcsr_save4 = const offset_of!(GuestContext, gcsr_save4),
    gcsr_save5 = const offset_of!(GuestContext, gcsr_save5),
    gcsr_save6 = const offset_of!(GuestContext, gcsr_save6),
    gcsr_save7 = const offset_of!(GuestContext, gcsr_save7),
    gcsr_save8 = const offset_of!(GuestContext, gcsr_save8),
    gcsr_save9 = const offset_of!(GuestContext, gcsr_save9),
    gcsr_save10 = const offset_of!(GuestContext, gcsr_save10),
    gcsr_save11 = const offset_of!(GuestContext, gcsr_save11),
    gcsr_save12 = const offset_of!(GuestContext, gcsr_save12),
    gcsr_save13 = const offset_of!(GuestContext, gcsr_save13),
    gcsr_save14 = const offset_of!(GuestContext, gcsr_save14),
    gcsr_save15 = const offset_of!(GuestContext, gcsr_save15),
    gcsr_tid = const offset_of!(GuestContext, gcsr_tid),
    gcsr_tcfg = const offset_of!(GuestContext, gcsr_tcfg),
    gcsr_cntc = const offset_of!(GuestContext, gcsr_cntc),
    gcsr_ticlr = const offset_of!(GuestContext, gcsr_ticlr),
    gcsr_llbctl = const offset_of!(GuestContext, gcsr_llbctl),
    gcsr_tlbrentry = const offset_of!(GuestContext, gcsr_tlbrentry),
    gcsr_tlbrbadv = const offset_of!(GuestContext, gcsr_tlbrbadv),
    gcsr_tlbrera = const offset_of!(GuestContext, gcsr_tlbrera),
    gcsr_tlbrsave = const offset_of!(GuestContext, gcsr_tlbrsave),
    gcsr_tlbrelo0 = const offset_of!(GuestContext, gcsr_tlbrelo0),
    gcsr_tlbrelo1 = const offset_of!(GuestContext, gcsr_tlbrelo1),
    gcsr_tlbrehi = const offset_of!(GuestContext, gcsr_tlbrehi),
    gcsr_tlbrprmd = const offset_of!(GuestContext, gcsr_tlbrprmd),
    gcsr_dmw0 = const offset_of!(GuestContext, gcsr_dmw0),
    gcsr_dmw1 = const offset_of!(GuestContext, gcsr_dmw1),
    gcsr_dmw2 = const offset_of!(GuestContext, gcsr_dmw2),
    gcsr_dmw3 = const offset_of!(GuestContext, gcsr_dmw3),
    host_estat = const offset_of!(GuestContext, host_estat),
    host_era = const offset_of!(GuestContext, host_era),
    host_badv = const offset_of!(GuestContext, host_badv),
    host_badi = const offset_of!(GuestContext, host_badi),
    host_tlbrbadv = const offset_of!(GuestContext, host_tlbrbadv),
    host_tlbrera = const offset_of!(GuestContext, host_tlbrera),
    host_pgdl = const offset_of!(GuestContext, host_pgdl),
    host_pgdh = const offset_of!(GuestContext, host_pgdh),
    host_pwcl = const offset_of!(GuestContext, host_pwcl),
    host_pwch = const offset_of!(GuestContext, host_pwch),
    host_stlbps = const offset_of!(GuestContext, host_stlbps),
    host_tlbrentry = const offset_of!(GuestContext, host_tlbrentry),
    host_asid = const offset_of!(GuestContext, host_asid),
    host_eentry = const offset_of!(GuestContext, host_eentry),
    host_ecfg = const offset_of!(GuestContext, host_ecfg),
    guest_tlbrentry = const offset_of!(GuestContext, guest_tlbrentry),
    guest_eentry = const offset_of!(GuestContext, guest_eentry),
    gpr0 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, zero),
    gpr1 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, ra),
    gpr2 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, tp),
    gpr3 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, sp),
    gpr4 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, a0),
    gpr5 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, a1),
    gpr6 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, a2),
    gpr7 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, a3),
    gpr8 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, a4),
    gpr9 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, a5),
    gpr10 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, a6),
    gpr11 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, a7),
    gpr12 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, t0),
    gpr13 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, t1),
    gpr14 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, t2),
    gpr15 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, t3),
    gpr16 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, t4),
    gpr17 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, t5),
    gpr18 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, t6),
    gpr19 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, t7),
    gpr20 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, t8),
    gpr21 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, u0),
    gpr22 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, fp),
    gpr23 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, s0),
    gpr24 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, s1),
    gpr25 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, s2),
    gpr26 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, s3),
    gpr27 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, s4),
    gpr28 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, s5),
    gpr29 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, s6),
    gpr30 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, s7),
    gpr31 = const offset_of!(GuestContext, x) + offset_of!(crate::registers::GeneralRegisters, s8),
);

#[unsafe(naked)]
#[unsafe(no_mangle)]
unsafe extern "C" fn __ax_cpu_lvzvmexit_trampoline() -> ! {
    core::arch::naked_asm!(
        "move $s0, $sp",
        "move $s1, $a0",
        "li.d $a0, {guest_fp}",
        "add.d $a0, $s0, $a0",
        "bl {save_fp}",
        "li.d $a0, {host_fp}",
        "add.d $a0, $s0, $a0",
        "bl {restore_fp}",
        "move $a0, $s1",
        "addi.d $t0, $s0, {ctx_size}",
        "ld.d $t1, $t0, 0",
        "move $sp, $t1",
        "ld.d $ra, $sp, 0",
        "ld.d $s0, $sp, 8",
        "ld.d $s1, $sp, 16",
        "ld.d $s2, $sp, 24",
        "ld.d $s3, $sp, 32",
        "ld.d $s4, $sp, 40",
        "ld.d $s5, $sp, 48",
        "ld.d $s6, $sp, 56",
        "ld.d $s7, $sp, 64",
        "ld.d $s8, $sp, 72",
        "ld.d $fp, $sp, 80",
        "ld.d $tp, $sp, 88",
        // SAVE_GUEST_REGS restored the CPU-owned r21 from the KS3 shadow.
        "addi.d $sp, $sp, 14 * 8",
        "jr $ra",
        host_fp = const offset_of!(Vcpu, host_fp),
        guest_fp = const offset_of!(Vcpu, fp),
        save_fp = sym super::super::fp::save_fp_registers,
        restore_fp = sym super::super::fp::restore_fp_registers,
        ctx_size = const core::mem::size_of::<GuestContext>(),
    )
}