aboutsummaryrefslogtreecommitdiff
path: root/target-arm/machine.c
blob: 8f9e7d4d28f897647d789317009061dc57022a06 (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
#include "hw/hw.h"
#include "hw/boards.h"
#include "sysemu/kvm.h"
#include "kvm_arm.h"

static bool vfp_needed(void *opaque)
{
    ARMCPU *cpu = opaque;
    CPUARMState *env = &cpu->env;

    return arm_feature(env, ARM_FEATURE_VFP);
}

static int get_fpscr(QEMUFile *f, void *opaque, size_t size)
{
    ARMCPU *cpu = opaque;
    CPUARMState *env = &cpu->env;
    uint32_t val = qemu_get_be32(f);

    vfp_set_fpscr(env, val);
    return 0;
}

static void put_fpscr(QEMUFile *f, void *opaque, size_t size)
{
    ARMCPU *cpu = opaque;
    CPUARMState *env = &cpu->env;

    qemu_put_be32(f, vfp_get_fpscr(env));
}

static const VMStateInfo vmstate_fpscr = {
    .name = "fpscr",
    .get = get_fpscr,
    .put = put_fpscr,
};

static const VMStateDescription vmstate_vfp = {
    .name = "cpu/vfp",
    .version_id = 3,
    .minimum_version_id = 3,
    .minimum_version_id_old = 3,
    .fields = (VMStateField[]) {
        VMSTATE_FLOAT64_ARRAY(env.vfp.regs, ARMCPU, 64),
        /* The xregs array is a little awkward because element 1 (FPSCR)
         * requires a specific accessor, so we have to split it up in
         * the vmstate:
         */
        VMSTATE_UINT32(env.vfp.xregs[0], ARMCPU),
        VMSTATE_UINT32_SUB_ARRAY(env.vfp.xregs, ARMCPU, 2, 14),
        {
            .name = "fpscr",
            .version_id = 0,
            .size = sizeof(uint32_t),
            .info = &vmstate_fpscr,
            .flags = VMS_SINGLE,
            .offset = 0,
        },
        VMSTATE_END_OF_LIST()
    }
};

static bool iwmmxt_needed(void *opaque)
{
    ARMCPU *cpu = opaque;
    CPUARMState *env = &cpu->env;

    return arm_feature(env, ARM_FEATURE_IWMMXT);
}

static const VMStateDescription vmstate_iwmmxt = {
    .name = "cpu/iwmmxt",
    .version_id = 1,
    .minimum_version_id = 1,
    .minimum_version_id_old = 1,
    .fields = (VMStateField[]) {
        VMSTATE_UINT64_ARRAY(env.iwmmxt.regs, ARMCPU, 16),
        VMSTATE_UINT32_ARRAY(env.iwmmxt.cregs, ARMCPU, 16),
        VMSTATE_END_OF_LIST()
    }
};

static bool m_needed(void *opaque)
{
    ARMCPU *cpu = opaque;
    CPUARMState *env = &cpu->env;

    return arm_feature(env, ARM_FEATURE_M);
}

const VMStateDescription vmstate_m = {
    .name = "cpu/m",
    .version_id = 1,
    .minimum_version_id = 1,
    .minimum_version_id_old = 1,
    .fields = (VMStateField[]) {
        VMSTATE_UINT32(env.v7m.other_sp, ARMCPU),
        VMSTATE_UINT32(env.v7m.vecbase, ARMCPU),
        VMSTATE_UINT32(env.v7m.basepri, ARMCPU),
        VMSTATE_UINT32(env.v7m.control, ARMCPU),
        VMSTATE_INT32(env.v7m.current_sp, ARMCPU),
        VMSTATE_INT32(env.v7m.exception, ARMCPU),
        VMSTATE_END_OF_LIST()
    }
};

static bool thumb2ee_needed(void *opaque)
{
    ARMCPU *cpu = opaque;
    CPUARMState *env = &cpu->env;

    return arm_feature(env, ARM_FEATURE_THUMB2EE);
}

static const VMStateDescription vmstate_thumb2ee = {
    .name = "cpu/thumb2ee",
    .version_id = 1,
    .minimum_version_id = 1,
    .minimum_version_id_old = 1,
    .fields = (VMStateField[]) {
        VMSTATE_UINT32(env.teecr, ARMCPU),
        VMSTATE_UINT32(env.teehbr, ARMCPU),
        VMSTATE_END_OF_LIST()
    }
};

static int get_cpsr(QEMUFile *f, void *opaque, size_t size)
{
    ARMCPU *cpu = opaque;
    CPUARMState *env = &cpu->env;
    uint32_t val = qemu_get_be32(f);

    /* Avoid mode switch when restoring CPSR */
    env->uncached_cpsr = val & CPSR_M;
    cpsr_write(env, val, 0xffffffff);
    return 0;
}

static void put_cpsr(QEMUFile *f, void *opaque, size_t size)
{
    ARMCPU *cpu = opaque;
    CPUARMState *env = &cpu->env;

    qemu_put_be32(f, cpsr_read(env));
}

static const VMStateInfo vmstate_cpsr = {
    .name = "cpsr",
    .get = get_cpsr,
    .put = put_cpsr,
};

static void cpu_pre_save(void *opaque)
{
    ARMCPU *cpu = opaque;

    if (kvm_enabled()) {
        if (!write_kvmstate_to_list(cpu)) {
            /* This should never fail */
            abort();
        }
    } else {
        if (!write_cpustate_to_list(cpu)) {
            /* This should never fail. */
            abort();
        }
    }

    cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len;
    memcpy(cpu->cpreg_vmstate_indexes, cpu->cpreg_indexes,
           cpu->cpreg_array_len * sizeof(uint64_t));
    memcpy(cpu->cpreg_vmstate_values, cpu->cpreg_values,
           cpu->cpreg_array_len * sizeof(uint64_t));
}

static int cpu_post_load(void *opaque, int version_id)
{
    ARMCPU *cpu = opaque;
    int i, v;

    /* Update the values list from the incoming migration data.
     * Anything in the incoming data which we don't know about is
     * a migration failure; anything we know about but the incoming
     * data doesn't specify retains its current (reset) value.
     * The indexes list remains untouched -- we only inspect the
     * incoming migration index list so we can match the values array
     * entries with the right slots in our own values array.
     */

    for (i = 0, v = 0; i < cpu->cpreg_array_len
             && v < cpu->cpreg_vmstate_array_len; i++) {
        if (cpu->cpreg_vmstate_indexes[v] > cpu->cpreg_indexes[i]) {
            /* register in our list but not incoming : skip it */
            continue;
        }
        if (cpu->cpreg_vmstate_indexes[v] < cpu->cpreg_indexes[i]) {
            /* register in their list but not ours: fail migration */
            return -1;
        }
        /* matching register, copy the value over */
        cpu->cpreg_values[i] = cpu->cpreg_vmstate_values[v];
        v++;
    }

    if (kvm_enabled()) {
        if (!write_list_to_kvmstate(cpu)) {
            return -1;
        }
        /* Note that it's OK for the TCG side not to know about
         * every register in the list; KVM is authoritative if
         * we're using it.
         */
        write_list_to_cpustate(cpu);
    } else {
        if (!write_list_to_cpustate(cpu)) {
            return -1;
        }
    }

    return 0;
}

const VMStateDescription vmstate_arm_cpu = {
    .name = "cpu",
    .version_id = 14,
    .minimum_version_id = 14,
    .minimum_version_id_old = 14,
    .pre_save = cpu_pre_save,
    .post_load = cpu_post_load,
    .fields = (VMStateField[]) {
        VMSTATE_UINT32_ARRAY(env.regs, ARMCPU, 16),
        {
            .name = "cpsr",
            .version_id = 0,
            .size = sizeof(uint32_t),
            .info = &vmstate_cpsr,
            .flags = VMS_SINGLE,
            .offset = 0,
        },
        VMSTATE_UINT32(env.spsr, ARMCPU),
        VMSTATE_UINT32_ARRAY(env.banked_spsr, ARMCPU, 6),
        VMSTATE_UINT32_ARRAY(env.banked_r13, ARMCPU, 6),
        VMSTATE_UINT32_ARRAY(env.banked_r14, ARMCPU, 6),
        VMSTATE_UINT32_ARRAY(env.usr_regs, ARMCPU, 5),
        VMSTATE_UINT32_ARRAY(env.fiq_regs, ARMCPU, 5),
        /* The length-check must come before the arrays to avoid
         * incoming data possibly overflowing the array.
         */
        VMSTATE_INT32_LE(cpreg_vmstate_array_len, ARMCPU),
        VMSTATE_VARRAY_INT32(cpreg_vmstate_indexes, ARMCPU,
                             cpreg_vmstate_array_len,
                             0, vmstate_info_uint64, uint64_t),
        VMSTATE_VARRAY_INT32(cpreg_vmstate_values, ARMCPU,
                             cpreg_vmstate_array_len,
                             0, vmstate_info_uint64, uint64_t),
        VMSTATE_UINT64(env.exclusive_addr, ARMCPU),
        VMSTATE_UINT64(env.exclusive_val, ARMCPU),
        VMSTATE_UINT64(env.exclusive_high, ARMCPU),
        VMSTATE_UINT64(env.features, ARMCPU),
        VMSTATE_TIMER(gt_timer[GTIMER_PHYS], ARMCPU),
        VMSTATE_TIMER(gt_timer[GTIMER_VIRT], ARMCPU),
        VMSTATE_END_OF_LIST()
    },
    .subsections = (VMStateSubsection[]) {
        {
            .vmsd = &vmstate_vfp,
            .needed = vfp_needed,
        } , {
            .vmsd = &vmstate_iwmmxt,
            .needed = iwmmxt_needed,
        } , {
            .vmsd = &vmstate_m,
            .needed = m_needed,
        } , {
            .vmsd = &vmstate_thumb2ee,
            .needed = thumb2ee_needed,
        } , {
            /* empty */
        }
    }
};