cpuid.c 44.6 KB
Newer Older
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
/*
 *  i386 CPUID helper functions
 *
 *  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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>

#include "cpu.h"
#include "kvm.h"

#include "qemu-option.h"
#include "qemu-config.h"

/* feature flags taken from "Intel Processor Identification and the CPUID
 * Instruction" and AMD's "CPUID Specification".  In cases of disagreement
 * between feature naming conventions, aliases may be added.
 */
static const char *feature_name[] = {
    "fpu", "vme", "de", "pse",
    "tsc", "msr", "pae", "mce",
    "cx8", "apic", NULL, "sep",
    "mtrr", "pge", "mca", "cmov",
    "pat", "pse36", "pn" /* Intel psn */, "clflush" /* Intel clfsh */,
    NULL, "ds" /* Intel dts */, "acpi", "mmx",
    "fxsr", "sse", "sse2", "ss",
    "ht" /* Intel htt */, "tm", "ia64", "pbe",
};
static const char *ext_feature_name[] = {
45
46
    "pni|sse3" /* Intel,AMD sse3 */, "pclmuldq", "dtes64", "monitor",
    "ds_cpl", "vmx", "smx", "est",
47
    "tm2", "ssse3", "cid", NULL,
48
    "fma", "cx16", "xtpr", "pdcm",
49
    NULL, NULL, "dca", "sse4.1|sse4_1",
50
51
52
    "sse4.2|sse4_2", "x2apic", "movbe", "popcnt",
    NULL, "aes", "xsave", "osxsave",
    "avx", NULL, NULL, "hypervisor",
53
54
55
56
57
58
59
60
61
62
63
64
65
66
};
static const char *ext2_feature_name[] = {
    "fpu", "vme", "de", "pse",
    "tsc", "msr", "pae", "mce",
    "cx8" /* AMD CMPXCHG8B */, "apic", NULL, "syscall",
    "mtrr", "pge", "mca", "cmov",
    "pat", "pse36", NULL, NULL /* Linux mp */,
    "nx" /* Intel xd */, NULL, "mmxext", "mmx",
    "fxsr", "fxsr_opt" /* AMD ffxsr */, "pdpe1gb" /* AMD Page1GB */, "rdtscp",
    NULL, "lm" /* Intel 64 */, "3dnowext", "3dnow",
};
static const char *ext3_feature_name[] = {
    "lahf_lm" /* AMD LahfSahf */, "cmp_legacy", "svm", "extapic" /* AMD ExtApicSpace */,
    "cr8legacy" /* AMD AltMovCr8 */, "abm", "sse4a", "misalignsse",
67
    "3dnowprefetch", "osvw", "ibs", "xop",
68
    "skinit", "wdt", NULL, NULL,
69
    "fma4", NULL, "cvt16", "nodeid_msr",
70
71
72
73
74
75
    NULL, NULL, NULL, NULL,
    NULL, NULL, NULL, NULL,
    NULL, NULL, NULL, NULL,
};

static const char *kvm_feature_name[] = {
76
    "kvmclock", "kvm_nopiodelay", "kvm_mmu", "kvmclock", "kvm_asyncpf", NULL, NULL, NULL,
77
78
79
80
81
    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
};

Joerg Roedel's avatar
Joerg Roedel committed
82
83
84
85
86
87
88
89
90
91
92
static const char *svm_feature_name[] = {
    "npt", "lbrv", "svm_lock", "nrip_save",
    "tsc_scale", "vmcb_clean",  "flushbyasid", "decodeassists",
    NULL, NULL, "pause_filter", NULL,
    "pfthreshold", NULL, NULL, NULL,
    NULL, NULL, NULL, NULL,
    NULL, NULL, NULL, NULL,
    NULL, NULL, NULL, NULL,
    NULL, NULL, NULL, NULL,
};

93
94
95
96
97
98
99
100
101
102
103
104
105
/* collects per-function cpuid data
 */
typedef struct model_features_t {
    uint32_t *guest_feat;
    uint32_t *host_feat;
    uint32_t check_feat;
    const char **flag_names;
    uint32_t cpuid;
    } model_features_t;

int check_cpuid = 0;
int enforce_cpuid = 0;

106
107
void host_cpuid(uint32_t function, uint32_t count,
                uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
108
109
110
{
#if defined(CONFIG_KVM)
    if (eax)
111
        *eax = kvm_arch_get_supported_cpuid(kvm_state, function, count, R_EAX);
112
    if (ebx)
113
        *ebx = kvm_arch_get_supported_cpuid(kvm_state, function, count, R_EBX);
114
    if (ecx)
115
        *ecx = kvm_arch_get_supported_cpuid(kvm_state, function, count, R_ECX);
116
    if (edx)
117
        *edx = kvm_arch_get_supported_cpuid(kvm_state, function, count, R_EDX);
118
119
#endif
}
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

#define iswhite(c) ((c) && ((c) <= ' ' || '~' < (c)))

/* general substring compare of *[s1..e1) and *[s2..e2).  sx is start of
 * a substring.  ex if !NULL points to the first char after a substring,
 * otherwise the string is assumed to sized by a terminating nul.
 * Return lexical ordering of *s1:*s2.
 */
static int sstrcmp(const char *s1, const char *e1, const char *s2,
    const char *e2)
{
    for (;;) {
        if (!*s1 || !*s2 || *s1 != *s2)
            return (*s1 - *s2);
        ++s1, ++s2;
        if (s1 == e1 && s2 == e2)
            return (0);
        else if (s1 == e1)
            return (*s2);
        else if (s2 == e2)
            return (*s1);
    }
}

/* compare *[s..e) to *altstr.  *altstr may be a simple string or multiple
 * '|' delimited (possibly empty) strings in which case search for a match
 * within the alternatives proceeds left to right.  Return 0 for success,
 * non-zero otherwise.
 */
static int altcmp(const char *s, const char *e, const char *altstr)
{
    const char *p, *q;

    for (q = p = altstr; ; ) {
        while (*p && *p != '|')
            ++p;
        if ((q == p && !*s) || (q != p && !sstrcmp(s, e, q, p)))
            return (0);
        if (!*p)
            return (1);
        else
            q = ++p;
    }
}

/* search featureset for flag *[s..e), if found set corresponding bit in
166
 * *pval and return true, otherwise return false
167
 */
168
169
static bool lookup_feature(uint32_t *pval, const char *s, const char *e,
                           const char **featureset)
170
171
172
{
    uint32_t mask;
    const char **ppc;
173
    bool found = false;
174

175
    for (mask = 1, ppc = featureset; mask; mask <<= 1, ++ppc) {
176
177
        if (*ppc && !altcmp(s, e, *ppc)) {
            *pval |= mask;
178
            found = true;
179
        }
180
181
    }
    return found;
182
183
184
185
186
187
}

static void add_flagname_to_bitmaps(const char *flagname, uint32_t *features,
                                    uint32_t *ext_features,
                                    uint32_t *ext2_features,
                                    uint32_t *ext3_features,
Joerg Roedel's avatar
Joerg Roedel committed
188
189
                                    uint32_t *kvm_features,
                                    uint32_t *svm_features)
190
191
192
193
194
{
    if (!lookup_feature(features, flagname, NULL, feature_name) &&
        !lookup_feature(ext_features, flagname, NULL, ext_feature_name) &&
        !lookup_feature(ext2_features, flagname, NULL, ext2_feature_name) &&
        !lookup_feature(ext3_features, flagname, NULL, ext3_feature_name) &&
Joerg Roedel's avatar
Joerg Roedel committed
195
196
        !lookup_feature(kvm_features, flagname, NULL, kvm_feature_name) &&
        !lookup_feature(svm_features, flagname, NULL, svm_feature_name))
197
198
199
200
201
202
203
204
205
206
207
            fprintf(stderr, "CPU feature %s not found\n", flagname);
}

typedef struct x86_def_t {
    struct x86_def_t *next;
    const char *name;
    uint32_t level;
    uint32_t vendor1, vendor2, vendor3;
    int family;
    int model;
    int stepping;
208
    int tsc_khz;
Joerg Roedel's avatar
Joerg Roedel committed
209
210
    uint32_t features, ext_features, ext2_features, ext3_features;
    uint32_t kvm_features, svm_features;
211
212
213
214
    uint32_t xlevel;
    char model_id[48];
    int vendor_override;
    uint32_t flags;
215
216
217
    /* Store the results of Centaur's CPUID instructions */
    uint32_t ext4_features;
    uint32_t xlevel2;
218
219
220
221
222
223
224
225
226
227
228
229
230
} x86_def_t;

#define I486_FEATURES (CPUID_FP87 | CPUID_VME | CPUID_PSE)
#define PENTIUM_FEATURES (I486_FEATURES | CPUID_DE | CPUID_TSC | \
          CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_MMX | CPUID_APIC)
#define PENTIUM2_FEATURES (PENTIUM_FEATURES | CPUID_PAE | CPUID_SEP | \
          CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | CPUID_PAT | \
          CPUID_PSE36 | CPUID_FXSR)
#define PENTIUM3_FEATURES (PENTIUM2_FEATURES | CPUID_SSE)
#define PPRO_FEATURES (CPUID_FP87 | CPUID_DE | CPUID_PSE | CPUID_TSC | \
          CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_PGE | CPUID_CMOV | \
          CPUID_PAT | CPUID_FXSR | CPUID_MMX | CPUID_SSE | CPUID_SSE2 | \
          CPUID_PAE | CPUID_SEP | CPUID_APIC)
231
#define EXT2_FEATURE_MASK 0x0183F3FF
232

233
234
235
236
237
#define TCG_FEATURES (CPUID_FP87 | CPUID_PSE | CPUID_TSC | CPUID_MSR | \
          CPUID_PAE | CPUID_MCE | CPUID_CX8 | CPUID_APIC | CPUID_SEP | \
          CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | CPUID_PAT | \
          CPUID_PSE36 | CPUID_CLFLUSH | CPUID_ACPI | CPUID_MMX | \
          CPUID_FXSR | CPUID_SSE | CPUID_SSE2 | CPUID_SS)
238
239
240
241
242
          /* partly implemented:
          CPUID_MTRR, CPUID_MCA, CPUID_CLFLUSH (needed for Win64)
          CPUID_PSE36 (needed for Solaris) */
          /* missing:
          CPUID_VME, CPUID_DTS, CPUID_SS, CPUID_HT, CPUID_TM, CPUID_PBE */
243
#define TCG_EXT_FEATURES (CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | \
Andi Kleen's avatar
Andi Kleen committed
244
          CPUID_EXT_CX16 | CPUID_EXT_POPCNT | \
245
          CPUID_EXT_HYPERVISOR)
246
247
          /* missing:
          CPUID_EXT_DTES64, CPUID_EXT_DSCPL, CPUID_EXT_VMX, CPUID_EXT_EST,
Andi Kleen's avatar
Andi Kleen committed
248
          CPUID_EXT_TM2, CPUID_EXT_XTPR, CPUID_EXT_PDCM, CPUID_EXT_XSAVE */
249
250
251
#define TCG_EXT2_FEATURES ((TCG_FEATURES & EXT2_FEATURE_MASK) | \
          CPUID_EXT2_NX | CPUID_EXT2_MMXEXT | CPUID_EXT2_RDTSCP | \
          CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT)
252
253
          /* missing:
          CPUID_EXT2_PDPE1GB */
254
255
#define TCG_EXT3_FEATURES (CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM | \
          CPUID_EXT3_CR8LEG | CPUID_EXT3_ABM | CPUID_EXT3_SSE4A)
Joerg Roedel's avatar
Joerg Roedel committed
256
#define TCG_SVM_FEATURES 0
257

258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
/* maintains list of cpu model definitions
 */
static x86_def_t *x86_defs = {NULL};

/* built-in cpu model definitions (deprecated)
 */
static x86_def_t builtin_x86_defs[] = {
    {
        .name = "qemu64",
        .level = 4,
        .vendor1 = CPUID_VENDOR_AMD_1,
        .vendor2 = CPUID_VENDOR_AMD_2,
        .vendor3 = CPUID_VENDOR_AMD_3,
        .family = 6,
        .model = 2,
        .stepping = 3,
        .features = PPRO_FEATURES |
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
            CPUID_PSE36,
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16 | CPUID_EXT_POPCNT,
278
        .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
        .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
            CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
        .xlevel = 0x8000000A,
        .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
    },
    {
        .name = "phenom",
        .level = 5,
        .vendor1 = CPUID_VENDOR_AMD_1,
        .vendor2 = CPUID_VENDOR_AMD_2,
        .vendor3 = CPUID_VENDOR_AMD_3,
        .family = 16,
        .model = 2,
        .stepping = 3,
        .features = PPRO_FEATURES |
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
296
            CPUID_PSE36 | CPUID_VME | CPUID_HT,
297
298
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_CX16 |
            CPUID_EXT_POPCNT,
299
        .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
300
301
            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX |
            CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT | CPUID_EXT2_MMXEXT |
302
            CPUID_EXT2_FFXSR | CPUID_EXT2_PDPE1GB | CPUID_EXT2_RDTSCP,
303
304
305
306
307
308
        /* Missing: CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
                    CPUID_EXT3_CR8LEG,
                    CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
                    CPUID_EXT3_OSVW, CPUID_EXT3_IBS */
        .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
            CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
Joerg Roedel's avatar
Joerg Roedel committed
309
        .svm_features = CPUID_SVM_NPT | CPUID_SVM_LBRV,
310
311
312
313
314
315
316
317
318
319
320
        .xlevel = 0x8000001A,
        .model_id = "AMD Phenom(tm) 9550 Quad-Core Processor"
    },
    {
        .name = "core2duo",
        .level = 10,
        .family = 6,
        .model = 15,
        .stepping = 11,
        .features = PPRO_FEATURES |
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
321
322
323
324
325
            CPUID_PSE36 | CPUID_VME | CPUID_DTS | CPUID_ACPI | CPUID_SS |
            CPUID_HT | CPUID_TM | CPUID_PBE,
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
            CPUID_EXT_DTES64 | CPUID_EXT_DSCPL | CPUID_EXT_VMX | CPUID_EXT_EST |
            CPUID_EXT_TM2 | CPUID_EXT_CX16 | CPUID_EXT_XTPR | CPUID_EXT_PDCM,
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
        .ext3_features = CPUID_EXT3_LAHF_LM,
        .xlevel = 0x80000008,
        .model_id = "Intel(R) Core(TM)2 Duo CPU     T7700  @ 2.40GHz",
    },
    {
        .name = "kvm64",
        .level = 5,
        .vendor1 = CPUID_VENDOR_INTEL_1,
        .vendor2 = CPUID_VENDOR_INTEL_2,
        .vendor3 = CPUID_VENDOR_INTEL_3,
        .family = 15,
        .model = 6,
        .stepping = 1,
        /* Missing: CPUID_VME, CPUID_HT */
        .features = PPRO_FEATURES |
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
            CPUID_PSE36,
        /* Missing: CPUID_EXT_POPCNT, CPUID_EXT_MONITOR */
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16,
        /* Missing: CPUID_EXT2_PDPE1GB, CPUID_EXT2_RDTSCP */
347
        .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
        /* Missing: CPUID_EXT3_LAHF_LM, CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
                    CPUID_EXT3_CR8LEG, CPUID_EXT3_ABM, CPUID_EXT3_SSE4A,
                    CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
                    CPUID_EXT3_OSVW, CPUID_EXT3_IBS, CPUID_EXT3_SVM */
        .ext3_features = 0,
        .xlevel = 0x80000008,
        .model_id = "Common KVM processor"
    },
    {
        .name = "qemu32",
        .level = 4,
        .family = 6,
        .model = 3,
        .stepping = 3,
        .features = PPRO_FEATURES,
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_POPCNT,
Andre Przywara's avatar
Andre Przywara committed
365
        .xlevel = 0x80000004,
366
367
        .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
    },
368
369
370
371
372
373
374
375
376
377
378
379
380
381
    {
        .name = "kvm32",
        .level = 5,
        .family = 15,
        .model = 6,
        .stepping = 1,
        .features = PPRO_FEATURES |
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_PSE36,
        .ext_features = CPUID_EXT_SSE3,
        .ext2_features = PPRO_FEATURES & EXT2_FEATURE_MASK,
        .ext3_features = 0,
        .xlevel = 0x80000008,
        .model_id = "Common 32-bit KVM processor"
    },
382
383
384
385
386
387
388
    {
        .name = "coreduo",
        .level = 10,
        .family = 6,
        .model = 14,
        .stepping = 8,
        .features = PPRO_FEATURES | CPUID_VME |
389
390
391
392
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_DTS | CPUID_ACPI |
            CPUID_SS | CPUID_HT | CPUID_TM | CPUID_PBE,
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_VMX |
            CPUID_EXT_EST | CPUID_EXT_TM2 | CPUID_EXT_XTPR | CPUID_EXT_PDCM,
393
394
395
396
397
398
        .ext2_features = CPUID_EXT2_NX,
        .xlevel = 0x80000008,
        .model_id = "Genuine Intel(R) CPU           T2600  @ 2.16GHz",
    },
    {
        .name = "486",
Andre Przywara's avatar
Andre Przywara committed
399
        .level = 1,
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
        .family = 4,
        .model = 0,
        .stepping = 0,
        .features = I486_FEATURES,
        .xlevel = 0,
    },
    {
        .name = "pentium",
        .level = 1,
        .family = 5,
        .model = 4,
        .stepping = 3,
        .features = PENTIUM_FEATURES,
        .xlevel = 0,
    },
    {
        .name = "pentium2",
        .level = 2,
        .family = 6,
        .model = 5,
        .stepping = 2,
        .features = PENTIUM2_FEATURES,
        .xlevel = 0,
    },
    {
        .name = "pentium3",
        .level = 2,
        .family = 6,
        .model = 7,
        .stepping = 3,
        .features = PENTIUM3_FEATURES,
        .xlevel = 0,
    },
    {
        .name = "athlon",
        .level = 2,
        .vendor1 = CPUID_VENDOR_AMD_1,
        .vendor2 = CPUID_VENDOR_AMD_2,
        .vendor3 = CPUID_VENDOR_AMD_3,
        .family = 6,
        .model = 2,
        .stepping = 3,
        .features = PPRO_FEATURES | CPUID_PSE36 | CPUID_VME | CPUID_MTRR | CPUID_MCA,
443
        .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) | CPUID_EXT2_MMXEXT | CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT,
444
445
446
447
448
449
450
451
452
453
454
455
        .xlevel = 0x80000008,
        /* XXX: put another string ? */
        .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
    },
    {
        .name = "n270",
        /* original is on level 10 */
        .level = 5,
        .family = 6,
        .model = 28,
        .stepping = 2,
        .features = PPRO_FEATURES |
456
457
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_VME | CPUID_DTS |
            CPUID_ACPI | CPUID_SS | CPUID_HT | CPUID_TM | CPUID_PBE,
458
            /* Some CPUs got no CPUID_SEP */
459
460
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
            CPUID_EXT_DSCPL | CPUID_EXT_EST | CPUID_EXT_TM2 | CPUID_EXT_XTPR,
461
        .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) | CPUID_EXT2_NX,
462
        .ext3_features = CPUID_EXT3_LAHF_LM,
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
        .xlevel = 0x8000000A,
        .model_id = "Intel(R) Atom(TM) CPU N270   @ 1.60GHz",
    },
};

static int cpu_x86_fill_model_id(char *str)
{
    uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
    int i;

    for (i = 0; i < 3; i++) {
        host_cpuid(0x80000002 + i, 0, &eax, &ebx, &ecx, &edx);
        memcpy(str + i * 16 +  0, &eax, 4);
        memcpy(str + i * 16 +  4, &ebx, 4);
        memcpy(str + i * 16 +  8, &ecx, 4);
        memcpy(str + i * 16 + 12, &edx, 4);
    }
    return 0;
}

static int cpu_x86_fill_host(x86_def_t *x86_cpu_def)
{
    uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;

    x86_cpu_def->name = "host";
    host_cpuid(0x0, 0, &eax, &ebx, &ecx, &edx);
    x86_cpu_def->level = eax;
    x86_cpu_def->vendor1 = ebx;
    x86_cpu_def->vendor2 = edx;
    x86_cpu_def->vendor3 = ecx;

    host_cpuid(0x1, 0, &eax, &ebx, &ecx, &edx);
    x86_cpu_def->family = ((eax >> 8) & 0x0F) + ((eax >> 20) & 0xFF);
    x86_cpu_def->model = ((eax >> 4) & 0x0F) | ((eax & 0xF0000) >> 12);
    x86_cpu_def->stepping = eax & 0x0F;
    x86_cpu_def->ext_features = ecx;
    x86_cpu_def->features = edx;

    host_cpuid(0x80000000, 0, &eax, &ebx, &ecx, &edx);
    x86_cpu_def->xlevel = eax;

    host_cpuid(0x80000001, 0, &eax, &ebx, &ecx, &edx);
    x86_cpu_def->ext2_features = edx;
    x86_cpu_def->ext3_features = ecx;
    cpu_x86_fill_model_id(x86_cpu_def->model_id);
    x86_cpu_def->vendor_override = 0;

510
511
512
513
514
515
516
517
518
519
520
521
    /* Call Centaur's CPUID instruction. */
    if (x86_cpu_def->vendor1 == CPUID_VENDOR_VIA_1 &&
        x86_cpu_def->vendor2 == CPUID_VENDOR_VIA_2 &&
        x86_cpu_def->vendor3 == CPUID_VENDOR_VIA_3) {
        host_cpuid(0xC0000000, 0, &eax, &ebx, &ecx, &edx);
        if (eax >= 0xC0000001) {
            /* Support VIA max extended level */
            x86_cpu_def->xlevel2 = eax;
            host_cpuid(0xC0000001, 0, &eax, &ebx, &ecx, &edx);
            x86_cpu_def->ext4_features = edx;
        }
    }
Joerg Roedel's avatar
Joerg Roedel committed
522
523
524
525
526
527
528
529
530

    /*
     * Every SVM feature requires emulation support in KVM - so we can't just
     * read the host features here. KVM might even support SVM features not
     * available on the host hardware. Just set all bits and mask out the
     * unsupported ones later.
     */
    x86_cpu_def->svm_features = -1;

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
    return 0;
}

static int unavailable_host_feature(struct model_features_t *f, uint32_t mask)
{
    int i;

    for (i = 0; i < 32; ++i)
        if (1 << i & mask) {
            fprintf(stderr, "warning: host cpuid %04x_%04x lacks requested"
                " flag '%s' [0x%08x]\n",
                f->cpuid >> 16, f->cpuid & 0xffff,
                f->flag_names[i] ? f->flag_names[i] : "[reserved]", mask);
            break;
        }
    return 0;
}

/* best effort attempt to inform user requested cpu flags aren't making
 * their way to the guest.  Note: ft[].check_feat ideally should be
 * specified via a guest_def field to suppress report of extraneous flags.
 */
static int check_features_against_host(x86_def_t *guest_def)
{
    x86_def_t host_def;
    uint32_t mask;
    int rv, i;
    struct model_features_t ft[] = {
        {&guest_def->features, &host_def.features,
            ~0, feature_name, 0x00000000},
        {&guest_def->ext_features, &host_def.ext_features,
            ~CPUID_EXT_HYPERVISOR, ext_feature_name, 0x00000001},
        {&guest_def->ext2_features, &host_def.ext2_features,
            ~PPRO_FEATURES, ext2_feature_name, 0x80000000},
        {&guest_def->ext3_features, &host_def.ext3_features,
            ~CPUID_EXT3_SVM, ext3_feature_name, 0x80000001}};

    cpu_x86_fill_host(&host_def);
Blue Swirl's avatar
Blue Swirl committed
569
    for (rv = 0, i = 0; i < ARRAY_SIZE(ft); ++i)
570
571
572
573
574
575
576
577
578
579
580
581
582
583
        for (mask = 1; mask; mask <<= 1)
            if (ft[i].check_feat & mask && *ft[i].guest_feat & mask &&
                !(*ft[i].host_feat & mask)) {
                    unavailable_host_feature(&ft[i], mask);
                    rv = 1;
                }
    return rv;
}

static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model)
{
    unsigned int i;
    x86_def_t *def;

584
    char *s = g_strdup(cpu_model);
585
    char *featurestr, *name = strtok(s, ",");
Joerg Roedel's avatar
Joerg Roedel committed
586
587
588
589
590
591
592
593
    /* Features to be added*/
    uint32_t plus_features = 0, plus_ext_features = 0;
    uint32_t plus_ext2_features = 0, plus_ext3_features = 0;
    uint32_t plus_kvm_features = 0, plus_svm_features = 0;
    /* Features to be removed */
    uint32_t minus_features = 0, minus_ext_features = 0;
    uint32_t minus_ext2_features = 0, minus_ext3_features = 0;
    uint32_t minus_kvm_features = 0, minus_svm_features = 0;
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
    uint32_t numvalue;

    for (def = x86_defs; def; def = def->next)
        if (!strcmp(name, def->name))
            break;
    if (kvm_enabled() && strcmp(name, "host") == 0) {
        cpu_x86_fill_host(x86_cpu_def);
    } else if (!def) {
        goto error;
    } else {
        memcpy(x86_cpu_def, def, sizeof(*def));
    }

    plus_kvm_features = ~0; /* not supported bits will be filtered out later */

    add_flagname_to_bitmaps("hypervisor", &plus_features,
        &plus_ext_features, &plus_ext2_features, &plus_ext3_features,
Joerg Roedel's avatar
Joerg Roedel committed
611
        &plus_kvm_features, &plus_svm_features);
612
613
614
615
616
617

    featurestr = strtok(NULL, ",");

    while (featurestr) {
        char *val;
        if (featurestr[0] == '+') {
Joerg Roedel's avatar
Joerg Roedel committed
618
619
620
621
            add_flagname_to_bitmaps(featurestr + 1, &plus_features,
                            &plus_ext_features, &plus_ext2_features,
                            &plus_ext3_features, &plus_kvm_features,
                            &plus_svm_features);
622
        } else if (featurestr[0] == '-') {
Joerg Roedel's avatar
Joerg Roedel committed
623
624
625
626
            add_flagname_to_bitmaps(featurestr + 1, &minus_features,
                            &minus_ext_features, &minus_ext2_features,
                            &minus_ext3_features, &minus_kvm_features,
                            &minus_svm_features);
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
        } else if ((val = strchr(featurestr, '='))) {
            *val = 0; val++;
            if (!strcmp(featurestr, "family")) {
                char *err;
                numvalue = strtoul(val, &err, 0);
                if (!*val || *err) {
                    fprintf(stderr, "bad numerical value %s\n", val);
                    goto error;
                }
                x86_cpu_def->family = numvalue;
            } else if (!strcmp(featurestr, "model")) {
                char *err;
                numvalue = strtoul(val, &err, 0);
                if (!*val || *err || numvalue > 0xff) {
                    fprintf(stderr, "bad numerical value %s\n", val);
                    goto error;
                }
                x86_cpu_def->model = numvalue;
            } else if (!strcmp(featurestr, "stepping")) {
                char *err;
                numvalue = strtoul(val, &err, 0);
                if (!*val || *err || numvalue > 0xf) {
                    fprintf(stderr, "bad numerical value %s\n", val);
                    goto error;
                }
                x86_cpu_def->stepping = numvalue ;
            } else if (!strcmp(featurestr, "level")) {
                char *err;
                numvalue = strtoul(val, &err, 0);
                if (!*val || *err) {
                    fprintf(stderr, "bad numerical value %s\n", val);
                    goto error;
                }
                x86_cpu_def->level = numvalue;
            } else if (!strcmp(featurestr, "xlevel")) {
                char *err;
                numvalue = strtoul(val, &err, 0);
                if (!*val || *err) {
                    fprintf(stderr, "bad numerical value %s\n", val);
                    goto error;
                }
                if (numvalue < 0x80000000) {
Aurelien Jarno's avatar
Aurelien Jarno committed
669
                    numvalue += 0x80000000;
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
                }
                x86_cpu_def->xlevel = numvalue;
            } else if (!strcmp(featurestr, "vendor")) {
                if (strlen(val) != 12) {
                    fprintf(stderr, "vendor string must be 12 chars long\n");
                    goto error;
                }
                x86_cpu_def->vendor1 = 0;
                x86_cpu_def->vendor2 = 0;
                x86_cpu_def->vendor3 = 0;
                for(i = 0; i < 4; i++) {
                    x86_cpu_def->vendor1 |= ((uint8_t)val[i    ]) << (8 * i);
                    x86_cpu_def->vendor2 |= ((uint8_t)val[i + 4]) << (8 * i);
                    x86_cpu_def->vendor3 |= ((uint8_t)val[i + 8]) << (8 * i);
                }
                x86_cpu_def->vendor_override = 1;
            } else if (!strcmp(featurestr, "model_id")) {
                pstrcpy(x86_cpu_def->model_id, sizeof(x86_cpu_def->model_id),
                        val);
689
690
691
692
693
694
695
696
697
698
699
            } else if (!strcmp(featurestr, "tsc_freq")) {
                int64_t tsc_freq;
                char *err;

                tsc_freq = strtosz_suffix_unit(val, &err,
                                               STRTOSZ_DEFSUFFIX_B, 1000);
                if (!*val || *err) {
                    fprintf(stderr, "bad numerical value %s\n", val);
                    goto error;
                }
                x86_cpu_def->tsc_khz = tsc_freq / 1000;
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
            } else {
                fprintf(stderr, "unrecognized feature %s\n", featurestr);
                goto error;
            }
        } else if (!strcmp(featurestr, "check")) {
            check_cpuid = 1;
        } else if (!strcmp(featurestr, "enforce")) {
            check_cpuid = enforce_cpuid = 1;
        } else {
            fprintf(stderr, "feature string `%s' not in format (+feature|-feature|feature=xyz)\n", featurestr);
            goto error;
        }
        featurestr = strtok(NULL, ",");
    }
    x86_cpu_def->features |= plus_features;
    x86_cpu_def->ext_features |= plus_ext_features;
    x86_cpu_def->ext2_features |= plus_ext2_features;
    x86_cpu_def->ext3_features |= plus_ext3_features;
    x86_cpu_def->kvm_features |= plus_kvm_features;
Joerg Roedel's avatar
Joerg Roedel committed
719
    x86_cpu_def->svm_features |= plus_svm_features;
720
721
722
723
724
    x86_cpu_def->features &= ~minus_features;
    x86_cpu_def->ext_features &= ~minus_ext_features;
    x86_cpu_def->ext2_features &= ~minus_ext2_features;
    x86_cpu_def->ext3_features &= ~minus_ext3_features;
    x86_cpu_def->kvm_features &= ~minus_kvm_features;
Joerg Roedel's avatar
Joerg Roedel committed
725
    x86_cpu_def->svm_features &= ~minus_svm_features;
726
727
728
729
    if (check_cpuid) {
        if (check_features_against_host(x86_cpu_def) && enforce_cpuid)
            goto error;
    }
730
    g_free(s);
731
732
733
    return 0;

error:
734
    g_free(s);
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
    return -1;
}

/* generate a composite string into buf of all cpuid names in featureset
 * selected by fbits.  indicate truncation at bufsize in the event of overflow.
 * if flags, suppress names undefined in featureset.
 */
static void listflags(char *buf, int bufsize, uint32_t fbits,
    const char **featureset, uint32_t flags)
{
    const char **p = &featureset[31];
    char *q, *b, bit;
    int nc;

    b = 4 <= bufsize ? buf + (bufsize -= 3) - 1 : NULL;
    *buf = '\0';
    for (q = buf, bit = 31; fbits && bufsize; --p, fbits &= ~(1 << bit), --bit)
        if (fbits & 1 << bit && (*p || !flags)) {
            if (*p)
                nc = snprintf(q, bufsize, "%s%s", q == buf ? "" : " ", *p);
            else
                nc = snprintf(q, bufsize, "%s[%d]", q == buf ? "" : " ", bit);
            if (bufsize <= nc) {
                if (b) {
                    memcpy(b, "...", sizeof("..."));
                }
                return;
            }
            q += nc;
            bufsize -= nc;
        }
}

/* generate CPU information:
 * -?        list model names
 * -?model   list model names/IDs
 * -?dump    output all model (x86_def_t) data
 * -?cpuid   list all recognized cpuid flag names
 */
774
void x86_cpu_list(FILE *f, fprintf_function cpu_fprintf, const char *optarg)
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
{
    unsigned char model = !strcmp("?model", optarg);
    unsigned char dump = !strcmp("?dump", optarg);
    unsigned char cpuid = !strcmp("?cpuid", optarg);
    x86_def_t *def;
    char buf[256];

    if (cpuid) {
        (*cpu_fprintf)(f, "Recognized CPUID flags:\n");
        listflags(buf, sizeof (buf), (uint32_t)~0, feature_name, 1);
        (*cpu_fprintf)(f, "  f_edx: %s\n", buf);
        listflags(buf, sizeof (buf), (uint32_t)~0, ext_feature_name, 1);
        (*cpu_fprintf)(f, "  f_ecx: %s\n", buf);
        listflags(buf, sizeof (buf), (uint32_t)~0, ext2_feature_name, 1);
        (*cpu_fprintf)(f, "  extf_edx: %s\n", buf);
        listflags(buf, sizeof (buf), (uint32_t)~0, ext3_feature_name, 1);
        (*cpu_fprintf)(f, "  extf_ecx: %s\n", buf);
        return;
    }
    for (def = x86_defs; def; def = def->next) {
        snprintf(buf, sizeof (buf), def->flags ? "[%s]": "%s", def->name);
        if (model || dump) {
            (*cpu_fprintf)(f, "x86 %16s  %-48s\n", buf, def->model_id);
        } else {
            (*cpu_fprintf)(f, "x86 %16s\n", buf);
        }
        if (dump) {
            memcpy(buf, &def->vendor1, sizeof (def->vendor1));
            memcpy(buf + 4, &def->vendor2, sizeof (def->vendor2));
            memcpy(buf + 8, &def->vendor3, sizeof (def->vendor3));
            buf[12] = '\0';
            (*cpu_fprintf)(f,
                "  family %d model %d stepping %d level %d xlevel 0x%x"
                " vendor \"%s\"\n",
                def->family, def->model, def->stepping, def->level,
                def->xlevel, buf);
            listflags(buf, sizeof (buf), def->features, feature_name, 0);
            (*cpu_fprintf)(f, "  feature_edx %08x (%s)\n", def->features,
                buf);
            listflags(buf, sizeof (buf), def->ext_features, ext_feature_name,
                0);
            (*cpu_fprintf)(f, "  feature_ecx %08x (%s)\n", def->ext_features,
                buf);
            listflags(buf, sizeof (buf), def->ext2_features, ext2_feature_name,
                0);
            (*cpu_fprintf)(f, "  extfeature_edx %08x (%s)\n",
                def->ext2_features, buf);
            listflags(buf, sizeof (buf), def->ext3_features, ext3_feature_name,
                0);
            (*cpu_fprintf)(f, "  extfeature_ecx %08x (%s)\n",
                def->ext3_features, buf);
            (*cpu_fprintf)(f, "\n");
        }
    }
829
830
831
    if (kvm_enabled()) {
        (*cpu_fprintf)(f, "x86 %16s\n", "[host]");
    }
832
833
834
835
836
837
}

int cpu_x86_register (CPUX86State *env, const char *cpu_model)
{
    x86_def_t def1, *def = &def1;

838
839
    memset(def, 0, sizeof(*def));

840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
    if (cpu_x86_find_by_name(def, cpu_model) < 0)
        return -1;
    if (def->vendor1) {
        env->cpuid_vendor1 = def->vendor1;
        env->cpuid_vendor2 = def->vendor2;
        env->cpuid_vendor3 = def->vendor3;
    } else {
        env->cpuid_vendor1 = CPUID_VENDOR_INTEL_1;
        env->cpuid_vendor2 = CPUID_VENDOR_INTEL_2;
        env->cpuid_vendor3 = CPUID_VENDOR_INTEL_3;
    }
    env->cpuid_vendor_override = def->vendor_override;
    env->cpuid_level = def->level;
    if (def->family > 0x0f)
        env->cpuid_version = 0xf00 | ((def->family - 0x0f) << 20);
    else
        env->cpuid_version = def->family << 8;
    env->cpuid_version |= ((def->model & 0xf) << 4) | ((def->model >> 4) << 16);
    env->cpuid_version |= def->stepping;
    env->cpuid_features = def->features;
    env->cpuid_ext_features = def->ext_features;
    env->cpuid_ext2_features = def->ext2_features;
862
    env->cpuid_ext3_features = def->ext3_features;
863
864
    env->cpuid_xlevel = def->xlevel;
    env->cpuid_kvm_features = def->kvm_features;
Joerg Roedel's avatar
Joerg Roedel committed
865
    env->cpuid_svm_features = def->svm_features;
866
867
    env->cpuid_ext4_features = def->ext4_features;
    env->cpuid_xlevel2 = def->xlevel2;
868
    env->tsc_khz = def->tsc_khz;
869
870
871
872
873
874
875
876
877
    if (!kvm_enabled()) {
        env->cpuid_features &= TCG_FEATURES;
        env->cpuid_ext_features &= TCG_EXT_FEATURES;
        env->cpuid_ext2_features &= (TCG_EXT2_FEATURES
#ifdef TARGET_X86_64
            | CPUID_EXT2_SYSCALL | CPUID_EXT2_LM
#endif
            );
        env->cpuid_ext3_features &= TCG_EXT3_FEATURES;
Joerg Roedel's avatar
Joerg Roedel committed
878
        env->cpuid_svm_features &= TCG_SVM_FEATURES;
879
    }
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
    {
        const char *model_id = def->model_id;
        int c, len, i;
        if (!model_id)
            model_id = "";
        len = strlen(model_id);
        for(i = 0; i < 48; i++) {
            if (i >= len)
                c = '\0';
            else
                c = (uint8_t)model_id[i];
            env->cpuid_model[i >> 2] |= c << (8 * (i & 3));
        }
    }
    return 0;
}

#if !defined(CONFIG_USER_ONLY)
/* copy vendor id string to 32 bit register, nul pad as needed
 */
static void cpyid(const char *s, uint32_t *id)
{
    char *d = (char *)id;
    char i;

    for (i = sizeof (*id); i--; )
        *d++ = *s ? *s++ : '\0';
}

/* interpret radix and convert from string to arbitrary scalar,
 * otherwise flag failure
 */
#define setscalar(pval, str, perr)                      \
{                                                       \
    char *pend;                                         \
    unsigned long ul;                                   \
                                                        \
    ul = strtoul(str, &pend, 0);                        \
    *str && !*pend ? (*pval = ul) : (*perr = 1);        \
}

/* map cpuid options to feature bits, otherwise return failure
 * (option tags in *str are delimited by whitespace)
 */
static void setfeatures(uint32_t *pval, const char *str,
    const char **featureset, int *perr)
{
    const char *p, *q;

    for (q = p = str; *p || *q; q = p) {
        while (iswhite(*p))
            q = ++p;
        while (*p && !iswhite(*p))
            ++p;
        if (!*q && !*p)
            return;
        if (!lookup_feature(pval, q, p, featureset)) {
            fprintf(stderr, "error: feature \"%.*s\" not available in set\n",
                (int)(p - q), q);
            *perr = 1;
            return;
        }
    }
}

/* map config file options to x86_def_t form
 */
static int cpudef_setfield(const char *name, const char *str, void *opaque)
{
    x86_def_t *def = opaque;
    int err = 0;

    if (!strcmp(name, "name")) {
953
        g_free((void *)def->name);
954
        def->name = g_strdup(str);
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
    } else if (!strcmp(name, "model_id")) {
        strncpy(def->model_id, str, sizeof (def->model_id));
    } else if (!strcmp(name, "level")) {
        setscalar(&def->level, str, &err)
    } else if (!strcmp(name, "vendor")) {
        cpyid(&str[0], &def->vendor1);
        cpyid(&str[4], &def->vendor2);
        cpyid(&str[8], &def->vendor3);
    } else if (!strcmp(name, "family")) {
        setscalar(&def->family, str, &err)
    } else if (!strcmp(name, "model")) {
        setscalar(&def->model, str, &err)
    } else if (!strcmp(name, "stepping")) {
        setscalar(&def->stepping, str, &err)
    } else if (!strcmp(name, "feature_edx")) {
        setfeatures(&def->features, str, feature_name, &err);
    } else if (!strcmp(name, "feature_ecx")) {
        setfeatures(&def->ext_features, str, ext_feature_name, &err);
    } else if (!strcmp(name, "extfeature_edx")) {
        setfeatures(&def->ext2_features, str, ext2_feature_name, &err);
    } else if (!strcmp(name, "extfeature_ecx")) {
        setfeatures(&def->ext3_features, str, ext3_feature_name, &err);
    } else if (!strcmp(name, "xlevel")) {
        setscalar(&def->xlevel, str, &err)
    } else {
        fprintf(stderr, "error: unknown option [%s = %s]\n", name, str);
        return (1);
    }
    if (err) {
        fprintf(stderr, "error: bad option value [%s = %s]\n", name, str);
        return (1);
    }
    return (0);
}

/* register config file entry as x86_def_t
 */
static int cpudef_register(QemuOpts *opts, void *opaque)
{
994
    x86_def_t *def = g_malloc0(sizeof (x86_def_t));
995
996
997
998
999
1000

    qemu_opt_foreach(opts, cpudef_setfield, def, 1);
    def->next = x86_defs;
    x86_defs = def;
    return (0);
}
1001
1002
1003
1004
1005
1006

void cpu_clear_apic_feature(CPUX86State *env)
{
    env->cpuid_features &= ~CPUID_APIC;
}

1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
#endif /* !CONFIG_USER_ONLY */

/* register "cpudef" models defined in configuration file.  Here we first
 * preload any built-in definitions
 */
void x86_cpudef_setup(void)
{
    int i;

    for (i = 0; i < ARRAY_SIZE(builtin_x86_defs); ++i) {
        builtin_x86_defs[i].next = x86_defs;
        builtin_x86_defs[i].flags = 1;
        x86_defs = &builtin_x86_defs[i];
    }
#if !defined(CONFIG_USER_ONLY)
1022
    qemu_opts_foreach(qemu_find_opts("cpudef"), cpudef_register, NULL, 0);
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
#endif
}

static void get_cpuid_vendor(CPUX86State *env, uint32_t *ebx,
                             uint32_t *ecx, uint32_t *edx)
{
    *ebx = env->cpuid_vendor1;
    *edx = env->cpuid_vendor2;
    *ecx = env->cpuid_vendor3;

    /* sysenter isn't supported on compatibility mode on AMD, syscall
     * isn't supported in compatibility mode on Intel.
     * Normally we advertise the actual cpu vendor, but you can override
     * this if you want to use KVM's sysenter/syscall emulation
     * in compatibility mode and when doing cross vendor migration
     */
Andre Przywara's avatar
Andre Przywara committed
1039
    if (kvm_enabled() && ! env->cpuid_vendor_override) {
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
        host_cpuid(0, 0, NULL, ebx, ecx, edx);
    }
}

void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
                   uint32_t *eax, uint32_t *ebx,
                   uint32_t *ecx, uint32_t *edx)
{
    /* test if maximum index reached */
    if (index & 0x80000000) {
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
        if (index > env->cpuid_xlevel) {
            if (env->cpuid_xlevel2 > 0) {
                /* Handle the Centaur's CPUID instruction. */
                if (index > env->cpuid_xlevel2) {
                    index = env->cpuid_xlevel2;
                } else if (index < 0xC0000000) {
                    index = env->cpuid_xlevel;
                }
            } else {
                index =  env->cpuid_xlevel;
            }
        }
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
    } else {
        if (index > env->cpuid_level)
            index = env->cpuid_level;
    }

    switch(index) {
    case 0:
        *eax = env->cpuid_level;
        get_cpuid_vendor(env, ebx, ecx, edx);
        break;
    case 1:
        *eax = env->cpuid_version;
        *ebx = (env->cpuid_apic_id << 24) | 8 << 8; /* CLFLUSH size in quad words, Linux wants it. */
        *ecx = env->cpuid_ext_features;
        *edx = env->cpuid_features;
        if (env->nr_cores * env->nr_threads > 1) {
            *ebx |= (env->nr_cores * env->nr_threads) << 16;
            *edx |= 1 << 28;    /* HTT bit */
        }
        break;
    case 2:
        /* cache info: needed for Pentium Pro compatibility */
        *eax = 1;
        *ebx = 0;
        *ecx = 0;
        *edx = 0x2c307d;
        break;
    case 4:
        /* cache info: needed for Core compatibility */
        if (env->nr_cores > 1) {
Aurelien Jarno's avatar
Aurelien Jarno committed
1092
            *eax = (env->nr_cores - 1) << 26;
1093
        } else {
Aurelien Jarno's avatar
Aurelien Jarno committed
1094
            *eax = 0;
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
        }
        switch (count) {
            case 0: /* L1 dcache info */
                *eax |= 0x0000121;
                *ebx = 0x1c0003f;
                *ecx = 0x000003f;
                *edx = 0x0000001;
                break;
            case 1: /* L1 icache info */
                *eax |= 0x0000122;
                *ebx = 0x1c0003f;
                *ecx = 0x000003f;
                *edx = 0x0000001;
                break;
            case 2: /* L2 cache info */
                *eax |= 0x0000143;
                if (env->nr_threads > 1) {
                    *eax |= (env->nr_threads - 1) << 14;
                }
                *ebx = 0x3c0003f;
                *ecx = 0x0000fff;
                *edx = 0x0000001;
                break;
            default: /* end of info */
                *eax = 0;
                *ebx = 0;
                *ecx = 0;
                *edx = 0;
                break;
        }
        break;
    case 5:
        /* mwait info: needed for Core compatibility */
        *eax = 0; /* Smallest monitor-line size in bytes */
        *ebx = 0; /* Largest monitor-line size in bytes */
        *ecx = CPUID_MWAIT_EMX | CPUID_MWAIT_IBE;
        *edx = 0;
        break;
    case 6:
        /* Thermal and Power Leaf */
        *eax = 0;
        *ebx = 0;
        *ecx = 0;
        *edx = 0;
        break;
Yang, Wei Y's avatar
Yang, Wei Y committed
1140
1141
    case 7:
        if (kvm_enabled()) {
1142
1143
1144
1145
1146
1147
            KVMState *s = env->kvm_state;

            *eax = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EAX);
            *ebx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EBX);
            *ecx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_ECX);
            *edx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EDX);
Yang, Wei Y's avatar
Yang, Wei Y committed
1148
1149
1150
1151
1152
1153
1154
        } else {
            *eax = 0;
            *ebx = 0;
            *ecx = 0;
            *edx = 0;
        }
        break;
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
    case 9:
        /* Direct Cache Access Information Leaf */
        *eax = 0; /* Bits 0-31 in DCA_CAP MSR */
        *ebx = 0;
        *ecx = 0;
        *edx = 0;
        break;
    case 0xA:
        /* Architectural Performance Monitoring Leaf */
        *eax = 0;
        *ebx = 0;
        *ecx = 0;
        *edx = 0;
        break;
Sheng Yang's avatar
Sheng Yang committed
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
    case 0xD:
        /* Processor Extended State */
        if (!(env->cpuid_ext_features & CPUID_EXT_XSAVE)) {
            *eax = 0;
            *ebx = 0;
            *ecx = 0;
            *edx = 0;
            break;
        }
        if (kvm_enabled()) {
1179
1180
1181
1182
1183
1184
            KVMState *s = env->kvm_state;

            *eax = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EAX);
            *ebx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EBX);
            *ecx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_ECX);
            *edx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EDX);
Sheng Yang's avatar
Sheng Yang committed
1185
1186
1187
1188
1189
1190
1191
        } else {
            *eax = 0;
            *ebx = 0;
            *ecx = 0;
            *edx = 0;
        }
        break;
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
    case 0x80000000:
        *eax = env->cpuid_xlevel;
        *ebx = env->cpuid_vendor1;
        *edx = env->cpuid_vendor2;
        *ecx = env->cpuid_vendor3;
        break;
    case 0x80000001:
        *eax = env->cpuid_version;
        *ebx = 0;
        *ecx = env->cpuid_ext3_features;
        *edx = env->cpuid_ext2_features;

        /* The Linux kernel checks for the CMPLegacy bit and
         * discards multiple thread information if it is set.
         * So dont set it here for Intel to make Linux guests happy.
         */
        if (env->nr_cores * env->nr_threads > 1) {
            uint32_t tebx, tecx, tedx;
            get_cpuid_vendor(env, &tebx, &tecx, &tedx);
            if (tebx != CPUID_VENDOR_INTEL_1 ||
                tedx != CPUID_VENDOR_INTEL_2 ||
                tecx != CPUID_VENDOR_INTEL_3) {
                *ecx |= 1 << 1;    /* CmpLegacy bit */
            }
        }
        break;
    case 0x80000002:
    case 0x80000003:
    case 0x80000004:
        *eax = env->cpuid_model[(index - 0x80000002) * 4 + 0];
        *ebx = env->cpuid_model[(index - 0x80000002) * 4 + 1];
        *ecx = env->cpuid_model[(index - 0x80000002) * 4 + 2];
        *edx = env->cpuid_model[(index - 0x80000002) * 4 + 3];
        break;
    case 0x80000005:
        /* cache info (L1 cache) */
        *eax = 0x01ff01ff;
        *ebx = 0x01ff01ff;
        *ecx = 0x40020140;
        *edx = 0x40020140;
        break;
    case 0x80000006:
        /* cache info (L2 cache) */
        *eax = 0;
        *ebx = 0x42004200;
        *ecx = 0x02008140;
        *edx = 0;
        break;
    case 0x80000008:
        /* virtual & phys address size in low 2 bytes. */
/* XXX: This value must match the one used in the MMU code. */
        if (env->cpuid_ext2_features & CPUID_EXT2_LM) {
            /* 64 bit processor */
/* XXX: The physical address space is limited to 42 bits in exec.c. */
            *eax = 0x00003028;	/* 48 bits virtual, 40 bits physical */
        } else {
            if (env->cpuid_features & CPUID_PSE36)
                *eax = 0x00000024; /* 36 bits physical */
            else
                *eax = 0x00000020; /* 32 bits physical */
        }
        *ebx = 0;
        *ecx = 0;
        *edx = 0;
        if (env->nr_cores * env->nr_threads > 1) {
            *ecx |= (env->nr_cores * env->nr_threads) - 1;
        }
        break;
    case 0x8000000A:
Joerg Roedel's avatar
Joerg Roedel committed
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
	if (env->cpuid_ext3_features & CPUID_EXT3_SVM) {
		*eax = 0x00000001; /* SVM Revision */
		*ebx = 0x00000010; /* nr of ASIDs */
		*ecx = 0;
		*edx = env->cpuid_svm_features; /* optional features */
	} else {
		*eax = 0;
		*ebx = 0;
		*ecx = 0;
		*edx = 0;
	}
1272
        break;
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
    case 0xC0000000:
        *eax = env->cpuid_xlevel2;
        *ebx = 0;
        *ecx = 0;
        *edx = 0;
        break;
    case 0xC0000001:
        /* Support for VIA CPU's CPUID instruction */
        *eax = env->cpuid_version;
        *ebx = 0;
        *ecx = 0;
        *edx = env->cpuid_ext4_features;
        break;
    case 0xC0000002:
    case 0xC0000003:
    case 0xC0000004:
        /* Reserved for the future, and now filled with zero */
        *eax = 0;
        *ebx = 0;
        *ecx = 0;
        *edx = 0;
        break;
1295
1296
1297
1298
1299
1300
1301
1302
1303
    default:
        /* reserved values: zero */
        *eax = 0;
        *ebx = 0;
        *ecx = 0;
        *edx = 0;
        break;
    }
}