summaryrefslogtreecommitdiffstats
path: root/target-i386/machine.c
blob: d78eceb779154541352ade476a24101195f26b42 (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
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
#include "hw/hw.h"
#include "hw/boards.h"
#include "hw/pc.h"
#include "hw/isa.h"

#include "exec-all.h"
#include "kvm.h"

static const VMStateDescription vmstate_segment = {
    .name = "segment",
    .version_id = 1,
    .minimum_version_id = 1,
    .minimum_version_id_old = 1,
    .fields      = (VMStateField []) {
        VMSTATE_UINT32(selector, SegmentCache),
        VMSTATE_UINTTL(base, SegmentCache),
        VMSTATE_UINT32(limit, SegmentCache),
        VMSTATE_UINT32(flags, SegmentCache),
        VMSTATE_END_OF_LIST()
    }
};

#define VMSTATE_SEGMENT(_field, _state) {                            \
    .name       = (stringify(_field)),                               \
    .size       = sizeof(SegmentCache),                              \
    .vmsd       = &vmstate_segment,                                  \
    .flags      = VMS_STRUCT,                                        \
    .offset     = offsetof(_state, _field)                           \
            + type_check(SegmentCache,typeof_field(_state, _field))  \
}

#define VMSTATE_SEGMENT_ARRAY(_field, _state, _n)                    \
    VMSTATE_STRUCT_ARRAY(_field, _state, _n, 0, vmstate_segment, SegmentCache)

static const VMStateDescription vmstate_xmm_reg = {
    .name = "xmm_reg",
    .version_id = 1,
    .minimum_version_id = 1,
    .minimum_version_id_old = 1,
    .fields      = (VMStateField []) {
        VMSTATE_UINT64(XMM_Q(0), XMMReg),
        VMSTATE_UINT64(XMM_Q(1), XMMReg),
        VMSTATE_END_OF_LIST()
    }
};

#define VMSTATE_XMM_REGS(_field, _state, _n)                         \
    VMSTATE_STRUCT_ARRAY(_field, _state, _n, 0, vmstate_xmm_reg, XMMReg)

/* YMMH format is the same as XMM */
static const VMStateDescription vmstate_ymmh_reg = {
    .name = "ymmh_reg",
    .version_id = 1,
    .minimum_version_id = 1,
    .minimum_version_id_old = 1,
    .fields      = (VMStateField []) {
        VMSTATE_UINT64(XMM_Q(0), XMMReg),
        VMSTATE_UINT64(XMM_Q(1), XMMReg),
        VMSTATE_END_OF_LIST()
    }
};

#define VMSTATE_YMMH_REGS_VARS(_field, _state, _n, _v)                         \
    VMSTATE_STRUCT_ARRAY(_field, _state, _n, _v, vmstate_ymmh_reg, XMMReg)

static const VMStateDescription vmstate_mtrr_var = {
    .name = "mtrr_var",
    .version_id = 1,
    .minimum_version_id = 1,
    .minimum_version_id_old = 1,
    .fields      = (VMStateField []) {
        VMSTATE_UINT64(base, MTRRVar),
        VMSTATE_UINT64(mask, MTRRVar),
        VMSTATE_END_OF_LIST()
    }
};

#define VMSTATE_MTRR_VARS(_field, _state, _n, _v)                    \
    VMSTATE_STRUCT_ARRAY(_field, _state, _n, _v, vmstate_mtrr_var, MTRRVar)

static void put_fpreg_error(QEMUFile *f, void *opaque, size_t size)
{
    fprintf(stderr, "call put_fpreg() with invalid arguments\n");
    exit(0);
}

#ifdef USE_X86LDOUBLE
/* XXX: add that in a FPU generic layer */
union x86_longdouble {
    uint64_t mant;
    uint16_t exp;
};

#define MANTD1(fp)	(fp & ((1LL << 52) - 1))
#define EXPBIAS1 1023
#define EXPD1(fp)	((fp >> 52) & 0x7FF)
#define SIGND1(fp)	((fp >> 32) & 0x80000000)

static void fp64_to_fp80(union x86_longdouble *p, uint64_t temp)
{
    int e;
    /* mantissa */
    p->mant = (MANTD1(temp) << 11) | (1LL << 63);
    /* exponent + sign */
    e = EXPD1(temp) - EXPBIAS1 + 16383;
    e |= SIGND1(temp) >> 16;
    p->exp = e;
}

static int get_fpreg(QEMUFile *f, void *opaque, size_t size)
{
    FPReg *fp_reg = opaque;
    uint64_t mant;
    uint16_t exp;

    qemu_get_be64s(f, &mant);
    qemu_get_be16s(f, &exp);
    fp_reg->d = cpu_set_fp80(mant, exp);
    return 0;
}

static void put_fpreg(QEMUFile *f, void *opaque, size_t size)
{
    FPReg *fp_reg = opaque;
    uint64_t mant;
    uint16_t exp;
    /* we save the real CPU data (in case of MMX usage only 'mant'
       contains the MMX register */
    cpu_get_fp80(&mant, &exp, fp_reg->d);
    qemu_put_be64s(f, &mant);
    qemu_put_be16s(f, &exp);
}

static const VMStateInfo vmstate_fpreg = {
    .name = "fpreg",
    .get  = get_fpreg,
    .put  = put_fpreg,
};

static int get_fpreg_1_mmx(QEMUFile *f, void *opaque, size_t size)
{
    union x86_longdouble *p = opaque;
    uint64_t mant;

    qemu_get_be64s(f, &mant);
    p->mant = mant;
    p->exp = 0xffff;
    return 0;
}

static const VMStateInfo vmstate_fpreg_1_mmx = {
    .name = "fpreg_1_mmx",
    .get  = get_fpreg_1_mmx,
    .put  = put_fpreg_error,
};

static int get_fpreg_1_no_mmx(QEMUFile *f, void *opaque, size_t size)
{
    union x86_longdouble *p = opaque;
    uint64_t mant;

    qemu_get_be64s(f, &mant);
    fp64_to_fp80(p, mant);
    return 0;
}

static const VMStateInfo vmstate_fpreg_1_no_mmx = {
    .name = "fpreg_1_no_mmx",
    .get  = get_fpreg_1_no_mmx,
    .put  = put_fpreg_error,
};

static bool fpregs_is_0(void *opaque, int version_id)
{
    CPUState *env = opaque;

    return (env->fpregs_format_vmstate == 0);
}

static bool fpregs_is_1_mmx(void *opaque, int version_id)
{
    CPUState *env = opaque;
    int guess_mmx;

    guess_mmx = ((env->fptag_vmstate == 0xff) &&
                 (env->fpus_vmstate & 0x3800) == 0);
    return (guess_mmx && (env->fpregs_format_vmstate == 1));
}

static bool fpregs_is_1_no_mmx(void *opaque, int version_id)
{
    CPUState *env = opaque;
    int guess_mmx;

    guess_mmx = ((env->fptag_vmstate == 0xff) &&
                 (env->fpus_vmstate & 0x3800) == 0);
    return (!guess_mmx && (env->fpregs_format_vmstate == 1));
}

#define VMSTATE_FP_REGS(_field, _state, _n)                               \
    VMSTATE_ARRAY_TEST(_field, _state, _n, fpregs_is_0, vmstate_fpreg, FPReg), \
    VMSTATE_ARRAY_TEST(_field, _state, _n, fpregs_is_1_mmx, vmstate_fpreg_1_mmx, FPReg), \
    VMSTATE_ARRAY_TEST(_field, _state, _n, fpregs_is_1_no_mmx, vmstate_fpreg_1_no_mmx, FPReg)

#else
static int get_fpreg(QEMUFile *f, void *opaque, size_t size)
{
    FPReg *fp_reg = opaque;

    qemu_get_be64s(f, &fp_reg->mmx.MMX_Q(0));
    return 0;
}

static void put_fpreg(QEMUFile *f, void *opaque, size_t size)
{
    FPReg *fp_reg = opaque;
    /* if we use doubles for float emulation, we save the doubles to
       avoid losing information in case of MMX usage. It can give
       problems if the image is restored on a CPU where long
       doubles are used instead. */
    qemu_put_be64s(f, &fp_reg->mmx.MMX_Q(0));
}

const VMStateInfo vmstate_fpreg = {
    .name = "fpreg",
    .get  = get_fpreg,
    .put  = put_fpreg,
};

static int get_fpreg_0_mmx(QEMUFile *f, void *opaque, size_t size)
{
    FPReg *fp_reg = opaque;
    uint64_t mant;
    uint16_t exp;

    qemu_get_be64s(f, &mant);
    qemu_get_be16s(f, &exp);
    fp_reg->mmx.MMX_Q(0) = mant;
    return 0;
}

const VMStateInfo vmstate_fpreg_0_mmx = {
    .name = "fpreg_0_mmx",
    .get  = get_fpreg_0_mmx,
    .put  = put_fpreg_error,
};

static int get_fpreg_0_no_mmx(QEMUFile *f, void *opaque, size_t size)
{
    FPReg *fp_reg = opaque;
    uint64_t mant;
    uint16_t exp;

    qemu_get_be64s(f, &mant);
    qemu_get_be16s(f, &exp);

    fp_reg->d = cpu_set_fp80(mant, exp);
    return 0;
}

const VMStateInfo vmstate_fpreg_0_no_mmx = {
    .name = "fpreg_0_no_mmx",
    .get  = get_fpreg_0_no_mmx,
    .put  = put_fpreg_error,
};

static bool fpregs_is_1(void *opaque, int version_id)
{
    CPUState *env = opaque;

    return env->fpregs_format_vmstate == 1;
}

static bool fpregs_is_0_mmx(void *opaque, int version_id)
{
    CPUState *env = opaque;
    int guess_mmx;

    guess_mmx = ((env->fptag_vmstate == 0xff) &&
                 (env->fpus_vmstate & 0x3800) == 0);
    return guess_mmx && env->fpregs_format_vmstate == 0;
}

static bool fpregs_is_0_no_mmx(void *opaque, int version_id)
{
    CPUState *env = opaque;
    int guess_mmx;

    guess_mmx = ((env->fptag_vmstate == 0xff) &&
                 (env->fpus_vmstate & 0x3800) == 0);
    return !guess_mmx && env->fpregs_format_vmstate == 0;
}

#define VMSTATE_FP_REGS(_field, _state, _n)                               \
    VMSTATE_ARRAY_TEST(_field, _state, _n, fpregs_is_1, vmstate_fpreg, FPReg), \
    VMSTATE_ARRAY_TEST(_field, _state, _n, fpregs_is_0_mmx, vmstate_fpreg_0_mmx, FPReg), \
    VMSTATE_ARRAY_TEST(_field, _state, _n, fpregs_is_0_no_mmx, vmstate_fpreg_0_no_mmx, FPReg)

#endif /* USE_X86LDOUBLE */

static bool version_is_5(void *opaque, int version_id)
{
    return version_id == 5;
}

#ifdef TARGET_X86_64
static bool less_than_7(void *opaque, int version_id)
{
    return version_id < 7;
}

static int get_uint64_as_uint32(QEMUFile *f, void *pv, size_t size)
{
    uint64_t *v = pv;
    *v = qemu_get_be32(f);
    return 0;
}

static void put_uint64_as_uint32(QEMUFile *f, void *pv, size_t size)
{
    uint64_t *v = pv;
    qemu_put_be32(f, *v);
}

static const VMStateInfo vmstate_hack_uint64_as_uint32 = {
    .name = "uint64_as_uint32",
    .get  = get_uint64_as_uint32,
    .put  = put_uint64_as_uint32,
};

#define VMSTATE_HACK_UINT32(_f, _s, _t)                                  \
    VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_hack_uint64_as_uint32, uint64_t)
#endif

static void cpu_pre_save(void *opaque)
{
    CPUState *env = opaque;
    int i;

    /* FPU */
    env->fpus_vmstate = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
    env->fptag_vmstate = 0;
    for(i = 0; i < 8; i++) {
        env->fptag_vmstate |= ((!env->fptags[i]) << i);
    }

#ifdef USE_X86LDOUBLE
    env->fpregs_format_vmstate = 0;
#else
    env->fpregs_format_vmstate = 1;
#endif
}

static int cpu_post_load(void *opaque, int version_id)
{
    CPUState *env = opaque;
    int i;

    /* XXX: restore FPU round state */
    env->fpstt = (env->fpus_vmstate >> 11) & 7;
    env->fpus = env->fpus_vmstate & ~0x3800;
    env->fptag_vmstate ^= 0xff;
    for(i = 0; i < 8; i++) {
        env->fptags[i] = (env->fptag_vmstate >> i) & 1;
    }

    cpu_breakpoint_remove_all(env, BP_CPU);
    cpu_watchpoint_remove_all(env, BP_CPU);
    for (i = 0; i < 4; i++)
        hw_breakpoint_insert(env, i);

    tlb_flush(env, 1);
    return 0;
}

static bool async_pf_msr_needed(void *opaque)
{
    CPUState *cpu = opaque;

    return cpu->async_pf_en_msr != 0;
}

static const VMStateDescription vmstate_async_pf_msr = {
    .name = "cpu/async_pf_msr",
    .version_id = 1,
    .minimum_version_id = 1,
    .minimum_version_id_old = 1,
    .fields      = (VMStateField []) {
        VMSTATE_UINT64(async_pf_en_msr, CPUState),
        VMSTATE_END_OF_LIST()
    }
};

static const VMStateDescription vmstate_cpu = {
    .name = "cpu",
    .version_id = CPU_SAVE_VERSION,
    .minimum_version_id = 3,
    .minimum_version_id_old = 3,
    .pre_save = cpu_pre_save,
    .post_load = cpu_post_load,
    .fields      = (VMStateField []) {
        VMSTATE_UINTTL_ARRAY(regs, CPUState, CPU_NB_REGS),
        VMSTATE_UINTTL(eip, CPUState),
        VMSTATE_UINTTL(eflags, CPUState),
        VMSTATE_UINT32(hflags, CPUState),
        /* FPU */
        VMSTATE_UINT16(fpuc, CPUState),
        VMSTATE_UINT16(fpus_vmstate, CPUState),
        VMSTATE_UINT16(fptag_vmstate, CPUState),
        VMSTATE_UINT16(fpregs_format_vmstate, CPUState),
        VMSTATE_FP_REGS(fpregs, CPUState, 8),

        VMSTATE_SEGMENT_ARRAY(segs, CPUState, 6),
        VMSTATE_SEGMENT(ldt, CPUState),
        VMSTATE_SEGMENT(tr, CPUState),
        VMSTATE_SEGMENT(gdt, CPUState),
        VMSTATE_SEGMENT(idt, CPUState),

        VMSTATE_UINT32(sysenter_cs, CPUState),
#ifdef TARGET_X86_64
        /* Hack: In v7 size changed from 32 to 64 bits on x86_64 */
        VMSTATE_HACK_UINT32(sysenter_esp, CPUState, less_than_7),
        VMSTATE_HACK_UINT32(sysenter_eip, CPUState, less_than_7),
        VMSTATE_UINTTL_V(sysenter_esp, CPUState, 7),
        VMSTATE_UINTTL_V(sysenter_eip, CPUState, 7),
#else
        VMSTATE_UINTTL(sysenter_esp, CPUState),
        VMSTATE_UINTTL(sysenter_eip, CPUState),
#endif

        VMSTATE_UINTTL(cr[0], CPUState),
        VMSTATE_UINTTL(cr[2], CPUState),
        VMSTATE_UINTTL(cr[3], CPUState),
        VMSTATE_UINTTL(cr[4], CPUState),
        VMSTATE_UINTTL_ARRAY(dr, CPUState, 8),
        /* MMU */
        VMSTATE_INT32(a20_mask, CPUState),
        /* XMM */
        VMSTATE_UINT32(mxcsr, CPUState),
        VMSTATE_XMM_REGS(xmm_regs, CPUState, CPU_NB_REGS),

#ifdef TARGET_X86_64
        VMSTATE_UINT64(efer, CPUState),
        VMSTATE_UINT64(star, CPUState),
        VMSTATE_UINT64(lstar, CPUState),
        VMSTATE_UINT64(cstar, CPUState),
        VMSTATE_UINT64(fmask, CPUState),
        VMSTATE_UINT64(kernelgsbase, CPUState),
#endif
        VMSTATE_UINT32_V(smbase, CPUState, 4),

        VMSTATE_UINT64_V(pat, CPUState, 5),
        VMSTATE_UINT32_V(hflags2, CPUState, 5),

        VMSTATE_UINT32_TEST(halted, CPUState, version_is_5),
        VMSTATE_UINT64_V(vm_hsave, CPUState, 5),
        VMSTATE_UINT64_V(vm_vmcb, CPUState, 5),
        VMSTATE_UINT64_V(tsc_offset, CPUState, 5),
        VMSTATE_UINT64_V(intercept, CPUState, 5),
        VMSTATE_UINT16_V(intercept_cr_read, CPUState, 5),
        VMSTATE_UINT16_V(intercept_cr_write, CPUState, 5),
        VMSTATE_UINT16_V(intercept_dr_read, CPUState, 5),
        VMSTATE_UINT16_V(intercept_dr_write, CPUState, 5),
        VMSTATE_UINT32_V(intercept_exceptions, CPUState, 5),
        VMSTATE_UINT8_V(v_tpr, CPUState, 5),
        /* MTRRs */
        VMSTATE_UINT64_ARRAY_V(mtrr_fixed, CPUState, 11, 8),
        VMSTATE_UINT64_V(mtrr_deftype, CPUState, 8),
        VMSTATE_MTRR_VARS(mtrr_var, CPUState, 8, 8),
        /* KVM-related states */
        VMSTATE_INT32_V(interrupt_injected, CPUState, 9),
        VMSTATE_UINT32_V(mp_state, CPUState, 9),
        VMSTATE_UINT64_V(tsc, CPUState, 9),
        VMSTATE_INT32_V(exception_injected, CPUState, 11),
        VMSTATE_UINT8_V(soft_interrupt, CPUState, 11),
        VMSTATE_UINT8_V(nmi_injected, CPUState, 11),
        VMSTATE_UINT8_V(nmi_pending, CPUState, 11),
        VMSTATE_UINT8_V(has_error_code, CPUState, 11),
        VMSTATE_UINT32_V(sipi_vector, CPUState, 11),
        /* MCE */
        VMSTATE_UINT64_V(mcg_cap, CPUState, 10),
        VMSTATE_UINT64_V(mcg_status, CPUState, 10),
        VMSTATE_UINT64_V(mcg_ctl, CPUState, 10),
        VMSTATE_UINT64_ARRAY_V(mce_banks, CPUState, MCE_BANKS_DEF *4, 10),
        /* rdtscp */
        VMSTATE_UINT64_V(tsc_aux, CPUState, 11),
        /* KVM pvclock msr */
        VMSTATE_UINT64_V(system_time_msr, CPUState, 11),
        VMSTATE_UINT64_V(wall_clock_msr, CPUState, 11),
        /* XSAVE related fields */
        VMSTATE_UINT64_V(xcr0, CPUState, 12),
        VMSTATE_UINT64_V(xstate_bv, CPUState, 12),
        VMSTATE_YMMH_REGS_VARS(ymmh_regs, CPUState, CPU_NB_REGS, 12),
        VMSTATE_END_OF_LIST()
        /* The above list is not sorted /wrt version numbers, watch out! */
    },
    .subsections = (VMStateSubsection []) {
        {
            .vmsd = &vmstate_async_pf_msr,
            .needed = async_pf_msr_needed,
        } , {
            /* empty */
        }
    }
};

void cpu_save(QEMUFile *f, void *opaque)
{
    vmstate_save_state(f, &vmstate_cpu, opaque);
}

int cpu_load(QEMUFile *f, void *opaque, int version_id)
{
    return vmstate_load_state(f, &vmstate_cpu, opaque, version_id);
}
OpenPOWER on IntegriCloud