aboutsummaryrefslogtreecommitdiff
path: root/target-i386/misc_helper.c
blob: 460257f6bc4579257a978f248b3b9afa75c2064f (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
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
/*
 *  x86 misc helpers
 *
 *  Copyright (c) 2003 Fabrice Bellard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/helper-proto.h"
#include "exec/cpu_ldst.h"
#include "exec/address-spaces.h"

void helper_outb(CPUX86State *env, uint32_t port, uint32_t data)
{
#ifdef CONFIG_USER_ONLY
    fprintf(stderr, "outb: port=0x%04x, data=%02x\n", port, data);
#else
    address_space_stb(&address_space_io, port, data,
                      cpu_get_mem_attrs(env), NULL);
#endif
}

target_ulong helper_inb(CPUX86State *env, uint32_t port)
{
#ifdef CONFIG_USER_ONLY
    fprintf(stderr, "inb: port=0x%04x\n", port);
    return 0;
#else
    return address_space_ldub(&address_space_io, port,
                              cpu_get_mem_attrs(env), NULL);
#endif
}

void helper_outw(CPUX86State *env, uint32_t port, uint32_t data)
{
#ifdef CONFIG_USER_ONLY
    fprintf(stderr, "outw: port=0x%04x, data=%04x\n", port, data);
#else
    address_space_stw(&address_space_io, port, data,
                      cpu_get_mem_attrs(env), NULL);
#endif
}

target_ulong helper_inw(CPUX86State *env, uint32_t port)
{
#ifdef CONFIG_USER_ONLY
    fprintf(stderr, "inw: port=0x%04x\n", port);
    return 0;
#else
    return address_space_lduw(&address_space_io, port,
                              cpu_get_mem_attrs(env), NULL);
#endif
}

void helper_outl(CPUX86State *env, uint32_t port, uint32_t data)
{
#ifdef CONFIG_USER_ONLY
    fprintf(stderr, "outw: port=0x%04x, data=%08x\n", port, data);
#else
    address_space_stl(&address_space_io, port, data,
                      cpu_get_mem_attrs(env), NULL);
#endif
}

target_ulong helper_inl(CPUX86State *env, uint32_t port)
{
#ifdef CONFIG_USER_ONLY
    fprintf(stderr, "inl: port=0x%04x\n", port);
    return 0;
#else
    return address_space_ldl(&address_space_io, port,
                             cpu_get_mem_attrs(env), NULL);
#endif
}

void helper_into(CPUX86State *env, int next_eip_addend)
{
    int eflags;

    eflags = cpu_cc_compute_all(env, CC_OP);
    if (eflags & CC_O) {
        raise_interrupt(env, EXCP04_INTO, 1, 0, next_eip_addend);
    }
}

void helper_cpuid(CPUX86State *env)
{
    uint32_t eax, ebx, ecx, edx;

    cpu_svm_check_intercept_param(env, SVM_EXIT_CPUID, 0);

    cpu_x86_cpuid(env, (uint32_t)env->regs[R_EAX], (uint32_t)env->regs[R_ECX],
                  &eax, &ebx, &ecx, &edx);
    env->regs[R_EAX] = eax;
    env->regs[R_EBX] = ebx;
    env->regs[R_ECX] = ecx;
    env->regs[R_EDX] = edx;
}

#if defined(CONFIG_USER_ONLY)
target_ulong helper_read_crN(CPUX86State *env, int reg)
{
    return 0;
}

void helper_write_crN(CPUX86State *env, int reg, target_ulong t0)
{
}
#else
target_ulong helper_read_crN(CPUX86State *env, int reg)
{
    target_ulong val;

    cpu_svm_check_intercept_param(env, SVM_EXIT_READ_CR0 + reg, 0);
    switch (reg) {
    default:
        val = env->cr[reg];
        break;
    case 8:
        if (!(env->hflags2 & HF2_VINTR_MASK)) {
            val = cpu_get_apic_tpr(x86_env_get_cpu(env)->apic_state);
        } else {
            val = env->v_tpr;
        }
        break;
    }
    return val;
}

void helper_write_crN(CPUX86State *env, int reg, target_ulong t0)
{
    cpu_svm_check_intercept_param(env, SVM_EXIT_WRITE_CR0 + reg, 0);
    switch (reg) {
    case 0:
        cpu_x86_update_cr0(env, t0);
        break;
    case 3:
        cpu_x86_update_cr3(env, t0);
        break;
    case 4:
        cpu_x86_update_cr4(env, t0);
        break;
    case 8:
        if (!(env->hflags2 & HF2_VINTR_MASK)) {
            cpu_set_apic_tpr(x86_env_get_cpu(env)->apic_state, t0);
        }
        env->v_tpr = t0 & 0x0f;
        break;
    default:
        env->cr[reg] = t0;
        break;
    }
}
#endif

void helper_lmsw(CPUX86State *env, target_ulong t0)
{
    /* only 4 lower bits of CR0 are modified. PE cannot be set to zero
       if already set to one. */
    t0 = (env->cr[0] & ~0xe) | (t0 & 0xf);
    helper_write_crN(env, 0, t0);
}

void helper_invlpg(CPUX86State *env, target_ulong addr)
{
    X86CPU *cpu = x86_env_get_cpu(env);

    cpu_svm_check_intercept_param(env, SVM_EXIT_INVLPG, 0);
    tlb_flush_page(CPU(cpu), addr);
}

void helper_rdtsc(CPUX86State *env)
{
    uint64_t val;

    if ((env->cr[4] & CR4_TSD_MASK) && ((env->hflags & HF_CPL_MASK) != 0)) {
        raise_exception_ra(env, EXCP0D_GPF, GETPC());
    }
    cpu_svm_check_intercept_param(env, SVM_EXIT_RDTSC, 0);

    val = cpu_get_tsc(env) + env->tsc_offset;
    env->regs[R_EAX] = (uint32_t)(val);
    env->regs[R_EDX] = (uint32_t)(val >> 32);
}

void helper_rdtscp(CPUX86State *env)
{
    helper_rdtsc(env);
    env->regs[R_ECX] = (uint32_t)(env->tsc_aux);
}

void helper_rdpmc(CPUX86State *env)
{
    if ((env->cr[4] & CR4_PCE_MASK) && ((env->hflags & HF_CPL_MASK) != 0)) {
        raise_exception_ra(env, EXCP0D_GPF, GETPC());
    }
    cpu_svm_check_intercept_param(env, SVM_EXIT_RDPMC, 0);

    /* currently unimplemented */
    qemu_log_mask(LOG_UNIMP, "x86: unimplemented rdpmc\n");
    raise_exception_err(env, EXCP06_ILLOP, 0);
}

#if defined(CONFIG_USER_ONLY)
void helper_wrmsr(CPUX86State *env)
{
}

void helper_rdmsr(CPUX86State *env)
{
}
#else
void helper_wrmsr(CPUX86State *env)
{
    uint64_t val;

    cpu_svm_check_intercept_param(env, SVM_EXIT_MSR, 1);

    val = ((uint32_t)env->regs[R_EAX]) |
        ((uint64_t)((uint32_t)env->regs[R_EDX]) << 32);

    switch ((uint32_t)env->regs[R_ECX]) {
    case MSR_IA32_SYSENTER_CS:
        env->sysenter_cs = val & 0xffff;
        break;
    case MSR_IA32_SYSENTER_ESP:
        env->sysenter_esp = val;
        break;
    case MSR_IA32_SYSENTER_EIP:
        env->sysenter_eip = val;
        break;
    case MSR_IA32_APICBASE:
        cpu_set_apic_base(x86_env_get_cpu(env)->apic_state, val);
        break;
    case MSR_EFER:
        {
            uint64_t update_mask;

            update_mask = 0;
            if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_SYSCALL) {
                update_mask |= MSR_EFER_SCE;
            }
            if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM) {
                update_mask |= MSR_EFER_LME;
            }
            if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_FFXSR) {
                update_mask |= MSR_EFER_FFXSR;
            }
            if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_NX) {
                update_mask |= MSR_EFER_NXE;
            }
            if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) {
                update_mask |= MSR_EFER_SVME;
            }
            if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_FFXSR) {
                update_mask |= MSR_EFER_FFXSR;
            }
            cpu_load_efer(env, (env->efer & ~update_mask) |
                          (val & update_mask));
        }
        break;
    case MSR_STAR:
        env->star = val;
        break;
    case MSR_PAT:
        env->pat = val;
        break;
    case MSR_VM_HSAVE_PA:
        env->vm_hsave = val;
        break;
#ifdef TARGET_X86_64
    case MSR_LSTAR:
        env->lstar = val;
        break;
    case MSR_CSTAR:
        env->cstar = val;
        break;
    case MSR_FMASK:
        env->fmask = val;
        break;
    case MSR_FSBASE:
        env->segs[R_FS].base = val;
        break;
    case MSR_GSBASE:
        env->segs[R_GS].base = val;
        break;
    case MSR_KERNELGSBASE:
        env->kernelgsbase = val;
        break;
#endif
    case MSR_MTRRphysBase(0):
    case MSR_MTRRphysBase(1):
    case MSR_MTRRphysBase(2):
    case MSR_MTRRphysBase(3):
    case MSR_MTRRphysBase(4):
    case MSR_MTRRphysBase(5):
    case MSR_MTRRphysBase(6):
    case MSR_MTRRphysBase(7):
        env->mtrr_var[((uint32_t)env->regs[R_ECX] -
                       MSR_MTRRphysBase(0)) / 2].base = val;
        break;
    case MSR_MTRRphysMask(0):
    case MSR_MTRRphysMask(1):
    case MSR_MTRRphysMask(2):
    case MSR_MTRRphysMask(3):
    case MSR_MTRRphysMask(4):
    case MSR_MTRRphysMask(5):
    case MSR_MTRRphysMask(6):
    case MSR_MTRRphysMask(7):
        env->mtrr_var[((uint32_t)env->regs[R_ECX] -
                       MSR_MTRRphysMask(0)) / 2].mask = val;
        break;
    case MSR_MTRRfix64K_00000:
        env->mtrr_fixed[(uint32_t)env->regs[R_ECX] -
                        MSR_MTRRfix64K_00000] = val;
        break;
    case MSR_MTRRfix16K_80000:
    case MSR_MTRRfix16K_A0000:
        env->mtrr_fixed[(uint32_t)env->regs[R_ECX] -
                        MSR_MTRRfix16K_80000 + 1] = val;
        break;
    case MSR_MTRRfix4K_C0000:
    case MSR_MTRRfix4K_C8000:
    case MSR_MTRRfix4K_D0000:
    case MSR_MTRRfix4K_D8000:
    case MSR_MTRRfix4K_E0000:
    case MSR_MTRRfix4K_E8000:
    case MSR_MTRRfix4K_F0000:
    case MSR_MTRRfix4K_F8000:
        env->mtrr_fixed[(uint32_t)env->regs[R_ECX] -
                        MSR_MTRRfix4K_C0000 + 3] = val;
        break;
    case MSR_MTRRdefType:
        env->mtrr_deftype = val;
        break;
    case MSR_MCG_STATUS:
        env->mcg_status = val;
        break;
    case MSR_MCG_CTL:
        if ((env->mcg_cap & MCG_CTL_P)
            && (val == 0 || val == ~(uint64_t)0)) {
            env->mcg_ctl = val;
        }
        break;
    case MSR_TSC_AUX:
        env->tsc_aux = val;
        break;
    case MSR_IA32_MISC_ENABLE:
        env->msr_ia32_misc_enable = val;
        break;
    default:
        if ((uint32_t)env->regs[R_ECX] >= MSR_MC0_CTL
            && (uint32_t)env->regs[R_ECX] < MSR_MC0_CTL +
            (4 * env->mcg_cap & 0xff)) {
            uint32_t offset = (uint32_t)env->regs[R_ECX] - MSR_MC0_CTL;
            if ((offset & 0x3) != 0
                || (val == 0 || val == ~(uint64_t)0)) {
                env->mce_banks[offset] = val;
            }
            break;
        }
        /* XXX: exception? */
        break;
    }
}

void helper_rdmsr(CPUX86State *env)
{
    uint64_t val;

    cpu_svm_check_intercept_param(env, SVM_EXIT_MSR, 0);

    switch ((uint32_t)env->regs[R_ECX]) {
    case MSR_IA32_SYSENTER_CS:
        val = env->sysenter_cs;
        break;
    case MSR_IA32_SYSENTER_ESP:
        val = env->sysenter_esp;
        break;
    case MSR_IA32_SYSENTER_EIP:
        val = env->sysenter_eip;
        break;
    case MSR_IA32_APICBASE:
        val = cpu_get_apic_base(x86_env_get_cpu(env)->apic_state);
        break;
    case MSR_EFER:
        val = env->efer;
        break;
    case MSR_STAR:
        val = env->star;
        break;
    case MSR_PAT:
        val = env->pat;
        break;
    case MSR_VM_HSAVE_PA:
        val = env->vm_hsave;
        break;
    case MSR_IA32_PERF_STATUS:
        /* tsc_increment_by_tick */
        val = 1000ULL;
        /* CPU multiplier */
        val |= (((uint64_t)4ULL) << 40);
        break;
#ifdef TARGET_X86_64
    case MSR_LSTAR:
        val = env->lstar;
        break;
    case MSR_CSTAR:
        val = env->cstar;
        break;
    case MSR_FMASK:
        val = env->fmask;
        break;
    case MSR_FSBASE:
        val = env->segs[R_FS].base;
        break;
    case MSR_GSBASE:
        val = env->segs[R_GS].base;
        break;
    case MSR_KERNELGSBASE:
        val = env->kernelgsbase;
        break;
    case MSR_TSC_AUX:
        val = env->tsc_aux;
        break;
#endif
    case MSR_MTRRphysBase(0):
    case MSR_MTRRphysBase(1):
    case MSR_MTRRphysBase(2):
    case MSR_MTRRphysBase(3):
    case MSR_MTRRphysBase(4):
    case MSR_MTRRphysBase(5):
    case MSR_MTRRphysBase(6):
    case MSR_MTRRphysBase(7):
        val = env->mtrr_var[((uint32_t)env->regs[R_ECX] -
                             MSR_MTRRphysBase(0)) / 2].base;
        break;
    case MSR_MTRRphysMask(0):
    case MSR_MTRRphysMask(1):
    case MSR_MTRRphysMask(2):
    case MSR_MTRRphysMask(3):
    case MSR_MTRRphysMask(4):
    case MSR_MTRRphysMask(5):
    case MSR_MTRRphysMask(6):
    case MSR_MTRRphysMask(7):
        val = env->mtrr_var[((uint32_t)env->regs[R_ECX] -
                             MSR_MTRRphysMask(0)) / 2].mask;
        break;
    case MSR_MTRRfix64K_00000:
        val = env->mtrr_fixed[0];
        break;
    case MSR_MTRRfix16K_80000:
    case MSR_MTRRfix16K_A0000:
        val = env->mtrr_fixed[(uint32_t)env->regs[R_ECX] -
                              MSR_MTRRfix16K_80000 + 1];
        break;
    case MSR_MTRRfix4K_C0000:
    case MSR_MTRRfix4K_C8000:
    case MSR_MTRRfix4K_D0000:
    case MSR_MTRRfix4K_D8000:
    case MSR_MTRRfix4K_E0000:
    case MSR_MTRRfix4K_E8000:
    case MSR_MTRRfix4K_F0000:
    case MSR_MTRRfix4K_F8000:
        val = env->mtrr_fixed[(uint32_t)env->regs[R_ECX] -
                              MSR_MTRRfix4K_C0000 + 3];
        break;
    case MSR_MTRRdefType:
        val = env->mtrr_deftype;
        break;
    case MSR_MTRRcap:
        if (env->features[FEAT_1_EDX] & CPUID_MTRR) {
            val = MSR_MTRRcap_VCNT | MSR_MTRRcap_FIXRANGE_SUPPORT |
                MSR_MTRRcap_WC_SUPPORTED;
        } else {
            /* XXX: exception? */
            val = 0;
        }
        break;
    case MSR_MCG_CAP:
        val = env->mcg_cap;
        break;
    case MSR_MCG_CTL:
        if (env->mcg_cap & MCG_CTL_P) {
            val = env->mcg_ctl;
        } else {
            val = 0;
        }
        break;
    case MSR_MCG_STATUS:
        val = env->mcg_status;
        break;
    case MSR_IA32_MISC_ENABLE:
        val = env->msr_ia32_misc_enable;
        break;
    default:
        if ((uint32_t)env->regs[R_ECX] >= MSR_MC0_CTL
            && (uint32_t)env->regs[R_ECX] < MSR_MC0_CTL +
            (4 * env->mcg_cap & 0xff)) {
            uint32_t offset = (uint32_t)env->regs[R_ECX] - MSR_MC0_CTL;
            val = env->mce_banks[offset];
            break;
        }
        /* XXX: exception? */
        val = 0;
        break;
    }
    env->regs[R_EAX] = (uint32_t)(val);
    env->regs[R_EDX] = (uint32_t)(val >> 32);
}
#endif

static void do_pause(X86CPU *cpu)
{
    CPUState *cs = CPU(cpu);

    /* Just let another CPU run.  */
    cs->exception_index = EXCP_INTERRUPT;
    cpu_loop_exit(cs);
}

static void do_hlt(X86CPU *cpu)
{
    CPUState *cs = CPU(cpu);
    CPUX86State *env = &cpu->env;

    env->hflags &= ~HF_INHIBIT_IRQ_MASK; /* needed if sti is just before */
    cs->halted = 1;
    cs->exception_index = EXCP_HLT;
    cpu_loop_exit(cs);
}

void helper_hlt(CPUX86State *env, int next_eip_addend)
{
    X86CPU *cpu = x86_env_get_cpu(env);

    cpu_svm_check_intercept_param(env, SVM_EXIT_HLT, 0);
    env->eip += next_eip_addend;

    do_hlt(cpu);
}

void helper_monitor(CPUX86State *env, target_ulong ptr)
{
    if ((uint32_t)env->regs[R_ECX] != 0) {
        raise_exception_ra(env, EXCP0D_GPF, GETPC());
    }
    /* XXX: store address? */
    cpu_svm_check_intercept_param(env, SVM_EXIT_MONITOR, 0);
}

void helper_mwait(CPUX86State *env, int next_eip_addend)
{
    CPUState *cs;
    X86CPU *cpu;

    if ((uint32_t)env->regs[R_ECX] != 0) {
        raise_exception_ra(env, EXCP0D_GPF, GETPC());
    }
    cpu_svm_check_intercept_param(env, SVM_EXIT_MWAIT, 0);
    env->eip += next_eip_addend;

    cpu = x86_env_get_cpu(env);
    cs = CPU(cpu);
    /* XXX: not complete but not completely erroneous */
    if (cs->cpu_index != 0 || CPU_NEXT(cs) != NULL) {
        do_pause(cpu);
    } else {
        do_hlt(cpu);
    }
}

void helper_pause(CPUX86State *env, int next_eip_addend)
{
    X86CPU *cpu = x86_env_get_cpu(env);

    cpu_svm_check_intercept_param(env, SVM_EXIT_PAUSE, 0);
    env->eip += next_eip_addend;

    do_pause(cpu);
}

void helper_debug(CPUX86State *env)
{
    CPUState *cs = CPU(x86_env_get_cpu(env));

    cs->exception_index = EXCP_DEBUG;
    cpu_loop_exit(cs);
}