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1
/*
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 *  i386 CPUID helper functions
3
 *
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 *  Copyright (c) 2003 Fabrice Bellard
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
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 */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
23

    
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#include "cpu.h"
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#include "kvm.h"
26

    
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#include "qemu-option.h"
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#include "qemu-config.h"
29

    
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/* feature flags taken from "Intel Processor Identification and the CPUID
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 * Instruction" and AMD's "CPUID Specification".  In cases of disagreement
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 * between feature naming conventions, aliases may be added.
33
 */
34
static const char *feature_name[] = {
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    "fpu", "vme", "de", "pse",
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    "tsc", "msr", "pae", "mce",
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    "cx8", "apic", NULL, "sep",
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    "mtrr", "pge", "mca", "cmov",
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    "pat", "pse36", "pn" /* Intel psn */, "clflush" /* Intel clfsh */,
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    NULL, "ds" /* Intel dts */, "acpi", "mmx",
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    "fxsr", "sse", "sse2", "ss",
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    "ht" /* Intel htt */, "tm", "ia64", "pbe",
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};
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static const char *ext_feature_name[] = {
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    "pni|sse3" /* Intel,AMD sse3 */, NULL, NULL, "monitor",
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    "ds_cpl", "vmx", NULL /* Linux smx */, "est",
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    "tm2", "ssse3", "cid", NULL,
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    NULL, "cx16", "xtpr", NULL,
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    NULL, NULL, "dca", "sse4.1|sse4_1",
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    "sse4.2|sse4_2", "x2apic", NULL, "popcnt",
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    NULL, NULL, NULL, NULL,
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    NULL, NULL, NULL, "hypervisor",
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};
54
static const char *ext2_feature_name[] = {
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    "fpu", "vme", "de", "pse",
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    "tsc", "msr", "pae", "mce",
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    "cx8" /* AMD CMPXCHG8B */, "apic", NULL, "syscall",
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    "mtrr", "pge", "mca", "cmov",
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    "pat", "pse36", NULL, NULL /* Linux mp */,
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    "nx" /* Intel xd */, NULL, "mmxext", "mmx",
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    "fxsr", "fxsr_opt" /* AMD ffxsr */, "pdpe1gb" /* AMD Page1GB */, "rdtscp",
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    NULL, "lm" /* Intel 64 */, "3dnowext", "3dnow",
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};
64
static const char *ext3_feature_name[] = {
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    "lahf_lm" /* AMD LahfSahf */, "cmp_legacy", "svm", "extapic" /* AMD ExtApicSpace */,
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    "cr8legacy" /* AMD AltMovCr8 */, "abm", "sse4a", "misalignsse",
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    "3dnowprefetch", "osvw", NULL /* Linux ibs */, NULL,
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    "skinit", "wdt", NULL, NULL,
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    NULL, NULL, NULL, NULL,
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    NULL, NULL, NULL, NULL,
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    NULL, NULL, NULL, NULL,
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    NULL, NULL, NULL, NULL,
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};
74

    
75
static const char *kvm_feature_name[] = {
76
    "kvmclock", "kvm_nopiodelay", "kvm_mmu", NULL, NULL, NULL, NULL, NULL,
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    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
80
};
81

    
82
/* collects per-function cpuid data
83
 */
84
typedef struct model_features_t {
85
    uint32_t *guest_feat;
86
    uint32_t *host_feat;
87
    uint32_t check_feat;
88
    const char **flag_names;
89
    uint32_t cpuid;
90
    } model_features_t;
91

    
92
int check_cpuid = 0;
93
int enforce_cpuid = 0;
94

    
95
static void host_cpuid(uint32_t function, uint32_t count, uint32_t *eax,
96
                       uint32_t *ebx, uint32_t *ecx, uint32_t *edx);
97

    
98
#define iswhite(c) ((c) && ((c) <= ' ' || '~' < (c)))
99

    
100
/* general substring compare of *[s1..e1) and *[s2..e2).  sx is start of
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 * a substring.  ex if !NULL points to the first char after a substring,
102
 * otherwise the string is assumed to sized by a terminating nul.
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 * Return lexical ordering of *s1:*s2.
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 */
105
static int sstrcmp(const char *s1, const char *e1, const char *s2,
106
    const char *e2)
107
{
108
    for (;;) {
109
        if (!*s1 || !*s2 || *s1 != *s2)
110
            return (*s1 - *s2);
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        ++s1, ++s2;
112
        if (s1 == e1 && s2 == e2)
113
            return (0);
114
        else if (s1 == e1)
115
            return (*s2);
116
        else if (s2 == e2)
117
            return (*s1);
118
    }
119
}
120

    
121
/* compare *[s..e) to *altstr.  *altstr may be a simple string or multiple
122
 * '|' delimited (possibly empty) strings in which case search for a match
123
 * within the alternatives proceeds left to right.  Return 0 for success,
124
 * non-zero otherwise.
125
 */
126
static int altcmp(const char *s, const char *e, const char *altstr)
127
{
128
    const char *p, *q;
129

    
130
    for (q = p = altstr; ; ) {
131
        while (*p && *p != '|')
132
            ++p;
133
        if ((q == p && !*s) || (q != p && !sstrcmp(s, e, q, p)))
134
            return (0);
135
        if (!*p)
136
            return (1);
137
        else
138
            q = ++p;
139
    }
140
}
141

    
142
/* search featureset for flag *[s..e), if found set corresponding bit in
143
 * *pval and return success, otherwise return zero
144
 */
145
static int lookup_feature(uint32_t *pval, const char *s, const char *e,
146
    const char **featureset)
147
{
148
    uint32_t mask;
149
    const char **ppc;
150

    
151
    for (mask = 1, ppc = featureset; mask; mask <<= 1, ++ppc)
152
        if (*ppc && !altcmp(s, e, *ppc)) {
153
            *pval |= mask;
154
            break;
155
        }
156
    return (mask ? 1 : 0);
157
}
158

    
159
static void add_flagname_to_bitmaps(const char *flagname, uint32_t *features,
160
                                    uint32_t *ext_features,
161
                                    uint32_t *ext2_features,
162
                                    uint32_t *ext3_features,
163
                                    uint32_t *kvm_features)
164
{
165
    if (!lookup_feature(features, flagname, NULL, feature_name) &&
166
        !lookup_feature(ext_features, flagname, NULL, ext_feature_name) &&
167
        !lookup_feature(ext2_features, flagname, NULL, ext2_feature_name) &&
168
        !lookup_feature(ext3_features, flagname, NULL, ext3_feature_name) &&
169
        !lookup_feature(kvm_features, flagname, NULL, kvm_feature_name))
170
            fprintf(stderr, "CPU feature %s not found\n", flagname);
171
}
172

    
173
typedef struct x86_def_t {
174
    struct x86_def_t *next;
175
    const char *name;
176
    uint32_t level;
177
    uint32_t vendor1, vendor2, vendor3;
178
    int family;
179
    int model;
180
    int stepping;
181
    uint32_t features, ext_features, ext2_features, ext3_features, kvm_features;
182
    uint32_t xlevel;
183
    char model_id[48];
184
    int vendor_override;
185
    uint32_t flags;
186
} x86_def_t;
187

    
188
#define I486_FEATURES (CPUID_FP87 | CPUID_VME | CPUID_PSE)
189
#define PENTIUM_FEATURES (I486_FEATURES | CPUID_DE | CPUID_TSC | \
190
          CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_MMX | CPUID_APIC)
191
#define PENTIUM2_FEATURES (PENTIUM_FEATURES | CPUID_PAE | CPUID_SEP | \
192
          CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | CPUID_PAT | \
193
          CPUID_PSE36 | CPUID_FXSR)
194
#define PENTIUM3_FEATURES (PENTIUM2_FEATURES | CPUID_SSE)
195
#define PPRO_FEATURES (CPUID_FP87 | CPUID_DE | CPUID_PSE | CPUID_TSC | \
196
          CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_PGE | CPUID_CMOV | \
197
          CPUID_PAT | CPUID_FXSR | CPUID_MMX | CPUID_SSE | CPUID_SSE2 | \
198
          CPUID_PAE | CPUID_SEP | CPUID_APIC)
199

    
200
/* maintains list of cpu model definitions
201
 */
202
static x86_def_t *x86_defs = {NULL};
203

    
204
/* built-in cpu model definitions (deprecated)
205
 */
206
static x86_def_t builtin_x86_defs[] = {
207
#ifdef TARGET_X86_64
208
    {
209
        .name = "qemu64",
210
        .level = 4,
211
        .vendor1 = CPUID_VENDOR_AMD_1,
212
        .vendor2 = CPUID_VENDOR_AMD_2,
213
        .vendor3 = CPUID_VENDOR_AMD_3,
214
        .family = 6,
215
        .model = 2,
216
        .stepping = 3,
217
        .features = PPRO_FEATURES |
218
        /* these features are needed for Win64 and aren't fully implemented */
219
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
220
        /* this feature is needed for Solaris and isn't fully implemented */
221
            CPUID_PSE36,
222
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16 | CPUID_EXT_POPCNT,
223
        .ext2_features = (PPRO_FEATURES & 0x0183F3FF) |
224
            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
225
        .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
226
            CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
227
        .xlevel = 0x8000000A,
228
        .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
229
    },
230
    {
231
        .name = "phenom",
232
        .level = 5,
233
        .vendor1 = CPUID_VENDOR_AMD_1,
234
        .vendor2 = CPUID_VENDOR_AMD_2,
235
        .vendor3 = CPUID_VENDOR_AMD_3,
236
        .family = 16,
237
        .model = 2,
238
        .stepping = 3,
239
        /* Missing: CPUID_VME, CPUID_HT */
240
        .features = PPRO_FEATURES |
241
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
242
            CPUID_PSE36,
243
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_CX16 |
244
            CPUID_EXT_POPCNT,
245
        /* Missing: CPUID_EXT2_PDPE1GB, CPUID_EXT2_RDTSCP */
246
        .ext2_features = (PPRO_FEATURES & 0x0183F3FF) |
247
            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX |
248
            CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT | CPUID_EXT2_MMXEXT |
249
            CPUID_EXT2_FFXSR,
250
        /* Missing: CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
251
                    CPUID_EXT3_CR8LEG,
252
                    CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
253
                    CPUID_EXT3_OSVW, CPUID_EXT3_IBS */
254
        .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
255
            CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
256
        .xlevel = 0x8000001A,
257
        .model_id = "AMD Phenom(tm) 9550 Quad-Core Processor"
258
    },
259
    {
260
        .name = "core2duo",
261
        .level = 10,
262
        .family = 6,
263
        .model = 15,
264
        .stepping = 11,
265
        /* The original CPU also implements these features:
266
               CPUID_VME, CPUID_DTS, CPUID_ACPI, CPUID_SS, CPUID_HT,
267
               CPUID_TM, CPUID_PBE */
268
        .features = PPRO_FEATURES |
269
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
270
            CPUID_PSE36,
271
        /* The original CPU also implements these ext features:
272
               CPUID_EXT_DTES64, CPUID_EXT_DSCPL, CPUID_EXT_VMX, CPUID_EXT_EST,
273
               CPUID_EXT_TM2, CPUID_EXT_CX16, CPUID_EXT_XTPR, CPUID_EXT_PDCM */
274
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3,
275
        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
276
        .ext3_features = CPUID_EXT3_LAHF_LM,
277
        .xlevel = 0x80000008,
278
        .model_id = "Intel(R) Core(TM)2 Duo CPU     T7700  @ 2.40GHz",
279
    },
280
    {
281
        .name = "kvm64",
282
        .level = 5,
283
        .vendor1 = CPUID_VENDOR_INTEL_1,
284
        .vendor2 = CPUID_VENDOR_INTEL_2,
285
        .vendor3 = CPUID_VENDOR_INTEL_3,
286
        .family = 15,
287
        .model = 6,
288
        .stepping = 1,
289
        /* Missing: CPUID_VME, CPUID_HT */
290
        .features = PPRO_FEATURES |
291
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
292
            CPUID_PSE36,
293
        /* Missing: CPUID_EXT_POPCNT, CPUID_EXT_MONITOR */
294
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16,
295
        /* Missing: CPUID_EXT2_PDPE1GB, CPUID_EXT2_RDTSCP */
296
        .ext2_features = (PPRO_FEATURES & 0x0183F3FF) |
297
            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
298
        /* Missing: CPUID_EXT3_LAHF_LM, CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
299
                    CPUID_EXT3_CR8LEG, CPUID_EXT3_ABM, CPUID_EXT3_SSE4A,
300
                    CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
301
                    CPUID_EXT3_OSVW, CPUID_EXT3_IBS, CPUID_EXT3_SVM */
302
        .ext3_features = 0,
303
        .xlevel = 0x80000008,
304
        .model_id = "Common KVM processor"
305
    },
306
#endif
307
    {
308
        .name = "qemu32",
309
        .level = 4,
310
        .family = 6,
311
        .model = 3,
312
        .stepping = 3,
313
        .features = PPRO_FEATURES,
314
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_POPCNT,
315
        .xlevel = 0,
316
        .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
317
    },
318
    {
319
        .name = "coreduo",
320
        .level = 10,
321
        .family = 6,
322
        .model = 14,
323
        .stepping = 8,
324
        /* The original CPU also implements these features:
325
               CPUID_DTS, CPUID_ACPI, CPUID_SS, CPUID_HT,
326
               CPUID_TM, CPUID_PBE */
327
        .features = PPRO_FEATURES | CPUID_VME |
328
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA,
329
        /* The original CPU also implements these ext features:
330
               CPUID_EXT_VMX, CPUID_EXT_EST, CPUID_EXT_TM2, CPUID_EXT_XTPR,
331
               CPUID_EXT_PDCM */
332
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR,
333
        .ext2_features = CPUID_EXT2_NX,
334
        .xlevel = 0x80000008,
335
        .model_id = "Genuine Intel(R) CPU           T2600  @ 2.16GHz",
336
    },
337
    {
338
        .name = "486",
339
        .level = 0,
340
        .family = 4,
341
        .model = 0,
342
        .stepping = 0,
343
        .features = I486_FEATURES,
344
        .xlevel = 0,
345
    },
346
    {
347
        .name = "pentium",
348
        .level = 1,
349
        .family = 5,
350
        .model = 4,
351
        .stepping = 3,
352
        .features = PENTIUM_FEATURES,
353
        .xlevel = 0,
354
    },
355
    {
356
        .name = "pentium2",
357
        .level = 2,
358
        .family = 6,
359
        .model = 5,
360
        .stepping = 2,
361
        .features = PENTIUM2_FEATURES,
362
        .xlevel = 0,
363
    },
364
    {
365
        .name = "pentium3",
366
        .level = 2,
367
        .family = 6,
368
        .model = 7,
369
        .stepping = 3,
370
        .features = PENTIUM3_FEATURES,
371
        .xlevel = 0,
372
    },
373
    {
374
        .name = "athlon",
375
        .level = 2,
376
        .vendor1 = CPUID_VENDOR_AMD_1,
377
        .vendor2 = CPUID_VENDOR_AMD_2,
378
        .vendor3 = CPUID_VENDOR_AMD_3,
379
        .family = 6,
380
        .model = 2,
381
        .stepping = 3,
382
        .features = PPRO_FEATURES | CPUID_PSE36 | CPUID_VME | CPUID_MTRR | CPUID_MCA,
383
        .ext2_features = (PPRO_FEATURES & 0x0183F3FF) | CPUID_EXT2_MMXEXT | CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT,
384
        .xlevel = 0x80000008,
385
        /* XXX: put another string ? */
386
        .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
387
    },
388
    {
389
        .name = "n270",
390
        /* original is on level 10 */
391
        .level = 5,
392
        .family = 6,
393
        .model = 28,
394
        .stepping = 2,
395
        .features = PPRO_FEATURES |
396
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_VME,
397
            /* Missing: CPUID_DTS | CPUID_ACPI | CPUID_SS |
398
             * CPUID_HT | CPUID_TM | CPUID_PBE */
399
            /* Some CPUs got no CPUID_SEP */
400
        .ext_features = CPUID_EXT_MONITOR |
401
            CPUID_EXT_SSE3 /* PNI */ | CPUID_EXT_SSSE3,
402
            /* Missing: CPUID_EXT_DSCPL | CPUID_EXT_EST |
403
             * CPUID_EXT_TM2 | CPUID_EXT_XTPR */
404
        .ext2_features = (PPRO_FEATURES & 0x0183F3FF) | CPUID_EXT2_NX,
405
        /* Missing: .ext3_features = CPUID_EXT3_LAHF_LM */
406
        .xlevel = 0x8000000A,
407
        .model_id = "Intel(R) Atom(TM) CPU N270   @ 1.60GHz",
408
    },
409
};
410

    
411
static int cpu_x86_fill_model_id(char *str)
412
{
413
    uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
414
    int i;
415

    
416
    for (i = 0; i < 3; i++) {
417
        host_cpuid(0x80000002 + i, 0, &eax, &ebx, &ecx, &edx);
418
        memcpy(str + i * 16 +  0, &eax, 4);
419
        memcpy(str + i * 16 +  4, &ebx, 4);
420
        memcpy(str + i * 16 +  8, &ecx, 4);
421
        memcpy(str + i * 16 + 12, &edx, 4);
422
    }
423
    return 0;
424
}
425

    
426
static int cpu_x86_fill_host(x86_def_t *x86_cpu_def)
427
{
428
    uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
429

    
430
    x86_cpu_def->name = "host";
431
    host_cpuid(0x0, 0, &eax, &ebx, &ecx, &edx);
432
    x86_cpu_def->level = eax;
433
    x86_cpu_def->vendor1 = ebx;
434
    x86_cpu_def->vendor2 = edx;
435
    x86_cpu_def->vendor3 = ecx;
436

    
437
    host_cpuid(0x1, 0, &eax, &ebx, &ecx, &edx);
438
    x86_cpu_def->family = ((eax >> 8) & 0x0F) + ((eax >> 20) & 0xFF);
439
    x86_cpu_def->model = ((eax >> 4) & 0x0F) | ((eax & 0xF0000) >> 12);
440
    x86_cpu_def->stepping = eax & 0x0F;
441
    x86_cpu_def->ext_features = ecx;
442
    x86_cpu_def->features = edx;
443

    
444
    host_cpuid(0x80000000, 0, &eax, &ebx, &ecx, &edx);
445
    x86_cpu_def->xlevel = eax;
446

    
447
    host_cpuid(0x80000001, 0, &eax, &ebx, &ecx, &edx);
448
    x86_cpu_def->ext2_features = edx;
449
    x86_cpu_def->ext3_features = ecx;
450
    cpu_x86_fill_model_id(x86_cpu_def->model_id);
451
    x86_cpu_def->vendor_override = 0;
452

    
453
    return 0;
454
}
455

    
456
static int unavailable_host_feature(struct model_features_t *f, uint32_t mask)
457
{
458
    int i;
459

    
460
    for (i = 0; i < 32; ++i)
461
        if (1 << i & mask) {
462
            fprintf(stderr, "warning: host cpuid %04x_%04x lacks requested"
463
                " flag '%s' [0x%08x]\n",
464
                f->cpuid >> 16, f->cpuid & 0xffff,
465
                f->flag_names[i] ? f->flag_names[i] : "[reserved]", mask);
466
            break;
467
        }
468
    return 0;
469
}
470

    
471
/* best effort attempt to inform user requested cpu flags aren't making
472
 * their way to the guest.  Note: ft[].check_feat ideally should be
473
 * specified via a guest_def field to suppress report of extraneous flags.
474
 */
475
static int check_features_against_host(x86_def_t *guest_def)
476
{
477
    x86_def_t host_def;
478
    uint32_t mask;
479
    int rv, i;
480
    struct model_features_t ft[] = {
481
        {&guest_def->features, &host_def.features,
482
            ~0, feature_name, 0x00000000},
483
        {&guest_def->ext_features, &host_def.ext_features,
484
            ~CPUID_EXT_HYPERVISOR, ext_feature_name, 0x00000001},
485
        {&guest_def->ext2_features, &host_def.ext2_features,
486
            ~PPRO_FEATURES, ext2_feature_name, 0x80000000},
487
        {&guest_def->ext3_features, &host_def.ext3_features,
488
            ~CPUID_EXT3_SVM, ext3_feature_name, 0x80000001}};
489

    
490
    cpu_x86_fill_host(&host_def);
491
    for (rv = 0, i = 0; i < sizeof (ft) / sizeof (ft[0]); ++i)
492
        for (mask = 1; mask; mask <<= 1)
493
            if (ft[i].check_feat & mask && *ft[i].guest_feat & mask &&
494
                !(*ft[i].host_feat & mask)) {
495
                    unavailable_host_feature(&ft[i], mask);
496
                    rv = 1;
497
                }
498
    return rv;
499
}
500

    
501
static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model)
502
{
503
    unsigned int i;
504
    x86_def_t *def;
505

    
506
    char *s = strdup(cpu_model);
507
    char *featurestr, *name = strtok(s, ",");
508
    uint32_t plus_features = 0, plus_ext_features = 0, plus_ext2_features = 0, plus_ext3_features = 0, plus_kvm_features = 0;
509
    uint32_t minus_features = 0, minus_ext_features = 0, minus_ext2_features = 0, minus_ext3_features = 0, minus_kvm_features = 0;
510
    uint32_t numvalue;
511

    
512
    for (def = x86_defs; def; def = def->next)
513
        if (!strcmp(name, def->name))
514
            break;
515
    if (kvm_enabled() && strcmp(name, "host") == 0) {
516
        cpu_x86_fill_host(x86_cpu_def);
517
    } else if (!def) {
518
        goto error;
519
    } else {
520
        memcpy(x86_cpu_def, def, sizeof(*def));
521
    }
522

    
523
    plus_kvm_features = ~0; /* not supported bits will be filtered out later */
524

    
525
    add_flagname_to_bitmaps("hypervisor", &plus_features,
526
        &plus_ext_features, &plus_ext2_features, &plus_ext3_features,
527
        &plus_kvm_features);
528

    
529
    featurestr = strtok(NULL, ",");
530

    
531
    while (featurestr) {
532
        char *val;
533
        if (featurestr[0] == '+') {
534
            add_flagname_to_bitmaps(featurestr + 1, &plus_features, &plus_ext_features, &plus_ext2_features, &plus_ext3_features, &plus_kvm_features);
535
        } else if (featurestr[0] == '-') {
536
            add_flagname_to_bitmaps(featurestr + 1, &minus_features, &minus_ext_features, &minus_ext2_features, &minus_ext3_features, &minus_kvm_features);
537
        } else if ((val = strchr(featurestr, '='))) {
538
            *val = 0; val++;
539
            if (!strcmp(featurestr, "family")) {
540
                char *err;
541
                numvalue = strtoul(val, &err, 0);
542
                if (!*val || *err) {
543
                    fprintf(stderr, "bad numerical value %s\n", val);
544
                    goto error;
545
                }
546
                x86_cpu_def->family = numvalue;
547
            } else if (!strcmp(featurestr, "model")) {
548
                char *err;
549
                numvalue = strtoul(val, &err, 0);
550
                if (!*val || *err || numvalue > 0xff) {
551
                    fprintf(stderr, "bad numerical value %s\n", val);
552
                    goto error;
553
                }
554
                x86_cpu_def->model = numvalue;
555
            } else if (!strcmp(featurestr, "stepping")) {
556
                char *err;
557
                numvalue = strtoul(val, &err, 0);
558
                if (!*val || *err || numvalue > 0xf) {
559
                    fprintf(stderr, "bad numerical value %s\n", val);
560
                    goto error;
561
                }
562
                x86_cpu_def->stepping = numvalue ;
563
            } else if (!strcmp(featurestr, "level")) {
564
                char *err;
565
                numvalue = strtoul(val, &err, 0);
566
                if (!*val || *err) {
567
                    fprintf(stderr, "bad numerical value %s\n", val);
568
                    goto error;
569
                }
570
                x86_cpu_def->level = numvalue;
571
            } else if (!strcmp(featurestr, "xlevel")) {
572
                char *err;
573
                numvalue = strtoul(val, &err, 0);
574
                if (!*val || *err) {
575
                    fprintf(stderr, "bad numerical value %s\n", val);
576
                    goto error;
577
                }
578
                if (numvalue < 0x80000000) {
579
                        numvalue += 0x80000000;
580
                }
581
                x86_cpu_def->xlevel = numvalue;
582
            } else if (!strcmp(featurestr, "vendor")) {
583
                if (strlen(val) != 12) {
584
                    fprintf(stderr, "vendor string must be 12 chars long\n");
585
                    goto error;
586
                }
587
                x86_cpu_def->vendor1 = 0;
588
                x86_cpu_def->vendor2 = 0;
589
                x86_cpu_def->vendor3 = 0;
590
                for(i = 0; i < 4; i++) {
591
                    x86_cpu_def->vendor1 |= ((uint8_t)val[i    ]) << (8 * i);
592
                    x86_cpu_def->vendor2 |= ((uint8_t)val[i + 4]) << (8 * i);
593
                    x86_cpu_def->vendor3 |= ((uint8_t)val[i + 8]) << (8 * i);
594
                }
595
                x86_cpu_def->vendor_override = 1;
596
            } else if (!strcmp(featurestr, "model_id")) {
597
                pstrcpy(x86_cpu_def->model_id, sizeof(x86_cpu_def->model_id),
598
                        val);
599
            } else {
600
                fprintf(stderr, "unrecognized feature %s\n", featurestr);
601
                goto error;
602
            }
603
        } else if (!strcmp(featurestr, "check")) {
604
            check_cpuid = 1;
605
        } else if (!strcmp(featurestr, "enforce")) {
606
            check_cpuid = enforce_cpuid = 1;
607
        } else {
608
            fprintf(stderr, "feature string `%s' not in format (+feature|-feature|feature=xyz)\n", featurestr);
609
            goto error;
610
        }
611
        featurestr = strtok(NULL, ",");
612
    }
613
    x86_cpu_def->features |= plus_features;
614
    x86_cpu_def->ext_features |= plus_ext_features;
615
    x86_cpu_def->ext2_features |= plus_ext2_features;
616
    x86_cpu_def->ext3_features |= plus_ext3_features;
617
    x86_cpu_def->kvm_features |= plus_kvm_features;
618
    x86_cpu_def->features &= ~minus_features;
619
    x86_cpu_def->ext_features &= ~minus_ext_features;
620
    x86_cpu_def->ext2_features &= ~minus_ext2_features;
621
    x86_cpu_def->ext3_features &= ~minus_ext3_features;
622
    x86_cpu_def->kvm_features &= ~minus_kvm_features;
623
    if (check_cpuid) {
624
        if (check_features_against_host(x86_cpu_def) && enforce_cpuid)
625
            goto error;
626
    }
627
    free(s);
628
    return 0;
629

    
630
error:
631
    free(s);
632
    return -1;
633
}
634

    
635
/* generate a composite string into buf of all cpuid names in featureset
636
 * selected by fbits.  indicate truncation at bufsize in the event of overflow.
637
 * if flags, suppress names undefined in featureset.
638
 */
639
static void listflags(char *buf, int bufsize, uint32_t fbits,
640
    const char **featureset, uint32_t flags)
641
{
642
    const char **p = &featureset[31];
643
    char *q, *b, bit;
644
    int nc;
645

    
646
    b = 4 <= bufsize ? buf + (bufsize -= 3) - 1 : NULL;
647
    *buf = '\0';
648
    for (q = buf, bit = 31; fbits && bufsize; --p, fbits &= ~(1 << bit), --bit)
649
        if (fbits & 1 << bit && (*p || !flags)) {
650
            if (*p)
651
                nc = snprintf(q, bufsize, "%s%s", q == buf ? "" : " ", *p);
652
            else
653
                nc = snprintf(q, bufsize, "%s[%d]", q == buf ? "" : " ", bit);
654
            if (bufsize <= nc) {
655
                if (b) {
656
                    memcpy(b, "...", sizeof("..."));
657
                }
658
                return;
659
            }
660
            q += nc;
661
            bufsize -= nc;
662
        }
663
}
664

    
665
/* generate CPU information:
666
 * -?        list model names
667
 * -?model   list model names/IDs
668
 * -?dump    output all model (x86_def_t) data
669
 * -?cpuid   list all recognized cpuid flag names
670
 */
671
void x86_cpu_list (FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
672
                  const char *optarg)
673
{
674
    unsigned char model = !strcmp("?model", optarg);
675
    unsigned char dump = !strcmp("?dump", optarg);
676
    unsigned char cpuid = !strcmp("?cpuid", optarg);
677
    x86_def_t *def;
678
    char buf[256];
679

    
680
    if (cpuid) {
681
        (*cpu_fprintf)(f, "Recognized CPUID flags:\n");
682
        listflags(buf, sizeof (buf), (uint32_t)~0, feature_name, 1);
683
        (*cpu_fprintf)(f, "  f_edx: %s\n", buf);
684
        listflags(buf, sizeof (buf), (uint32_t)~0, ext_feature_name, 1);
685
        (*cpu_fprintf)(f, "  f_ecx: %s\n", buf);
686
        listflags(buf, sizeof (buf), (uint32_t)~0, ext2_feature_name, 1);
687
        (*cpu_fprintf)(f, "  extf_edx: %s\n", buf);
688
        listflags(buf, sizeof (buf), (uint32_t)~0, ext3_feature_name, 1);
689
        (*cpu_fprintf)(f, "  extf_ecx: %s\n", buf);
690
        return;
691
    }
692
    for (def = x86_defs; def; def = def->next) {
693
        snprintf(buf, sizeof (buf), def->flags ? "[%s]": "%s", def->name);
694
        if (model || dump) {
695
            (*cpu_fprintf)(f, "x86 %16s  %-48s\n", buf, def->model_id);
696
        } else {
697
            (*cpu_fprintf)(f, "x86 %16s\n", buf);
698
        }
699
        if (dump) {
700
            memcpy(buf, &def->vendor1, sizeof (def->vendor1));
701
            memcpy(buf + 4, &def->vendor2, sizeof (def->vendor2));
702
            memcpy(buf + 8, &def->vendor3, sizeof (def->vendor3));
703
            buf[12] = '\0';
704
            (*cpu_fprintf)(f,
705
                "  family %d model %d stepping %d level %d xlevel 0x%x"
706
                " vendor \"%s\"\n",
707
                def->family, def->model, def->stepping, def->level,
708
                def->xlevel, buf);
709
            listflags(buf, sizeof (buf), def->features, feature_name, 0);
710
            (*cpu_fprintf)(f, "  feature_edx %08x (%s)\n", def->features,
711
                buf);
712
            listflags(buf, sizeof (buf), def->ext_features, ext_feature_name,
713
                0);
714
            (*cpu_fprintf)(f, "  feature_ecx %08x (%s)\n", def->ext_features,
715
                buf);
716
            listflags(buf, sizeof (buf), def->ext2_features, ext2_feature_name,
717
                0);
718
            (*cpu_fprintf)(f, "  extfeature_edx %08x (%s)\n",
719
                def->ext2_features, buf);
720
            listflags(buf, sizeof (buf), def->ext3_features, ext3_feature_name,
721
                0);
722
            (*cpu_fprintf)(f, "  extfeature_ecx %08x (%s)\n",
723
                def->ext3_features, buf);
724
            (*cpu_fprintf)(f, "\n");
725
        }
726
    }
727
}
728

    
729
int cpu_x86_register (CPUX86State *env, const char *cpu_model)
730
{
731
    x86_def_t def1, *def = &def1;
732

    
733
    if (cpu_x86_find_by_name(def, cpu_model) < 0)
734
        return -1;
735
    if (def->vendor1) {
736
        env->cpuid_vendor1 = def->vendor1;
737
        env->cpuid_vendor2 = def->vendor2;
738
        env->cpuid_vendor3 = def->vendor3;
739
    } else {
740
        env->cpuid_vendor1 = CPUID_VENDOR_INTEL_1;
741
        env->cpuid_vendor2 = CPUID_VENDOR_INTEL_2;
742
        env->cpuid_vendor3 = CPUID_VENDOR_INTEL_3;
743
    }
744
    env->cpuid_vendor_override = def->vendor_override;
745
    env->cpuid_level = def->level;
746
    if (def->family > 0x0f)
747
        env->cpuid_version = 0xf00 | ((def->family - 0x0f) << 20);
748
    else
749
        env->cpuid_version = def->family << 8;
750
    env->cpuid_version |= ((def->model & 0xf) << 4) | ((def->model >> 4) << 16);
751
    env->cpuid_version |= def->stepping;
752
    env->cpuid_features = def->features;
753
    env->pat = 0x0007040600070406ULL;
754
    env->cpuid_ext_features = def->ext_features;
755
    env->cpuid_ext2_features = def->ext2_features;
756
    env->cpuid_xlevel = def->xlevel;
757
    env->cpuid_kvm_features = def->kvm_features;
758
    {
759
        const char *model_id = def->model_id;
760
        int c, len, i;
761
        if (!model_id)
762
            model_id = "";
763
        len = strlen(model_id);
764
        for(i = 0; i < 48; i++) {
765
            if (i >= len)
766
                c = '\0';
767
            else
768
                c = (uint8_t)model_id[i];
769
            env->cpuid_model[i >> 2] |= c << (8 * (i & 3));
770
        }
771
    }
772
    return 0;
773
}
774

    
775
#if !defined(CONFIG_USER_ONLY)
776
/* copy vendor id string to 32 bit register, nul pad as needed
777
 */
778
static void cpyid(const char *s, uint32_t *id)
779
{
780
    char *d = (char *)id;
781
    char i;
782

    
783
    for (i = sizeof (*id); i--; )
784
        *d++ = *s ? *s++ : '\0';
785
}
786

    
787
/* interpret radix and convert from string to arbitrary scalar,
788
 * otherwise flag failure
789
 */
790
#define setscalar(pval, str, perr)                      \
791
{                                                       \
792
    char *pend;                                         \
793
    unsigned long ul;                                   \
794
                                                        \
795
    ul = strtoul(str, &pend, 0);                        \
796
    *str && !*pend ? (*pval = ul) : (*perr = 1);        \
797
}
798

    
799
/* map cpuid options to feature bits, otherwise return failure
800
 * (option tags in *str are delimited by whitespace)
801
 */
802
static void setfeatures(uint32_t *pval, const char *str,
803
    const char **featureset, int *perr)
804
{
805
    const char *p, *q;
806

    
807
    for (q = p = str; *p || *q; q = p) {
808
        while (iswhite(*p))
809
            q = ++p;
810
        while (*p && !iswhite(*p))
811
            ++p;
812
        if (!*q && !*p)
813
            return;
814
        if (!lookup_feature(pval, q, p, featureset)) {
815
            fprintf(stderr, "error: feature \"%.*s\" not available in set\n",
816
                (int)(p - q), q);
817
            *perr = 1;
818
            return;
819
        }
820
    }
821
}
822

    
823
/* map config file options to x86_def_t form
824
 */
825
static int cpudef_setfield(const char *name, const char *str, void *opaque)
826
{
827
    x86_def_t *def = opaque;
828
    int err = 0;
829

    
830
    if (!strcmp(name, "name")) {
831
        def->name = strdup(str);
832
    } else if (!strcmp(name, "model_id")) {
833
        strncpy(def->model_id, str, sizeof (def->model_id));
834
    } else if (!strcmp(name, "level")) {
835
        setscalar(&def->level, str, &err)
836
    } else if (!strcmp(name, "vendor")) {
837
        cpyid(&str[0], &def->vendor1);
838
        cpyid(&str[4], &def->vendor2);
839
        cpyid(&str[8], &def->vendor3);
840
    } else if (!strcmp(name, "family")) {
841
        setscalar(&def->family, str, &err)
842
    } else if (!strcmp(name, "model")) {
843
        setscalar(&def->model, str, &err)
844
    } else if (!strcmp(name, "stepping")) {
845
        setscalar(&def->stepping, str, &err)
846
    } else if (!strcmp(name, "feature_edx")) {
847
        setfeatures(&def->features, str, feature_name, &err);
848
    } else if (!strcmp(name, "feature_ecx")) {
849
        setfeatures(&def->ext_features, str, ext_feature_name, &err);
850
    } else if (!strcmp(name, "extfeature_edx")) {
851
        setfeatures(&def->ext2_features, str, ext2_feature_name, &err);
852
    } else if (!strcmp(name, "extfeature_ecx")) {
853
        setfeatures(&def->ext3_features, str, ext3_feature_name, &err);
854
    } else if (!strcmp(name, "xlevel")) {
855
        setscalar(&def->xlevel, str, &err)
856
    } else {
857
        fprintf(stderr, "error: unknown option [%s = %s]\n", name, str);
858
        return (1);
859
    }
860
    if (err) {
861
        fprintf(stderr, "error: bad option value [%s = %s]\n", name, str);
862
        return (1);
863
    }
864
    return (0);
865
}
866

    
867
/* register config file entry as x86_def_t
868
 */
869
static int cpudef_register(QemuOpts *opts, void *opaque)
870
{
871
    x86_def_t *def = qemu_mallocz(sizeof (x86_def_t));
872

    
873
    qemu_opt_foreach(opts, cpudef_setfield, def, 1);
874
    def->next = x86_defs;
875
    x86_defs = def;
876
    return (0);
877
}
878
#endif /* !CONFIG_USER_ONLY */
879

    
880
/* register "cpudef" models defined in configuration file.  Here we first
881
 * preload any built-in definitions
882
 */
883
void x86_cpudef_setup(void)
884
{
885
    int i;
886

    
887
    for (i = 0; i < ARRAY_SIZE(builtin_x86_defs); ++i) {
888
        builtin_x86_defs[i].next = x86_defs;
889
        builtin_x86_defs[i].flags = 1;
890
        x86_defs = &builtin_x86_defs[i];
891
    }
892
#if !defined(CONFIG_USER_ONLY)
893
    qemu_opts_foreach(&qemu_cpudef_opts, cpudef_register, NULL, 0);
894
#endif
895
}
896

    
897
static void host_cpuid(uint32_t function, uint32_t count,
898
                       uint32_t *eax, uint32_t *ebx,
899
                       uint32_t *ecx, uint32_t *edx)
900
{
901
#if defined(CONFIG_KVM)
902
    uint32_t vec[4];
903

    
904
#ifdef __x86_64__
905
    asm volatile("cpuid"
906
                 : "=a"(vec[0]), "=b"(vec[1]),
907
                   "=c"(vec[2]), "=d"(vec[3])
908
                 : "0"(function), "c"(count) : "cc");
909
#else
910
    asm volatile("pusha \n\t"
911
                 "cpuid \n\t"
912
                 "mov %%eax, 0(%2) \n\t"
913
                 "mov %%ebx, 4(%2) \n\t"
914
                 "mov %%ecx, 8(%2) \n\t"
915
                 "mov %%edx, 12(%2) \n\t"
916
                 "popa"
917
                 : : "a"(function), "c"(count), "S"(vec)
918
                 : "memory", "cc");
919
#endif
920

    
921
    if (eax)
922
        *eax = vec[0];
923
    if (ebx)
924
        *ebx = vec[1];
925
    if (ecx)
926
        *ecx = vec[2];
927
    if (edx)
928
        *edx = vec[3];
929
#endif
930
}
931

    
932
static void get_cpuid_vendor(CPUX86State *env, uint32_t *ebx,
933
                             uint32_t *ecx, uint32_t *edx)
934
{
935
    *ebx = env->cpuid_vendor1;
936
    *edx = env->cpuid_vendor2;
937
    *ecx = env->cpuid_vendor3;
938

    
939
    /* sysenter isn't supported on compatibility mode on AMD, syscall
940
     * isn't supported in compatibility mode on Intel.
941
     * Normally we advertise the actual cpu vendor, but you can override
942
     * this if you want to use KVM's sysenter/syscall emulation
943
     * in compatibility mode and when doing cross vendor migration
944
     */
945
    if (kvm_enabled() && env->cpuid_vendor_override) {
946
        host_cpuid(0, 0, NULL, ebx, ecx, edx);
947
    }
948
}
949

    
950
void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
951
                   uint32_t *eax, uint32_t *ebx,
952
                   uint32_t *ecx, uint32_t *edx)
953
{
954
    /* test if maximum index reached */
955
    if (index & 0x80000000) {
956
        if (index > env->cpuid_xlevel)
957
            index = env->cpuid_level;
958
    } else {
959
        if (index > env->cpuid_level)
960
            index = env->cpuid_level;
961
    }
962

    
963
    switch(index) {
964
    case 0:
965
        *eax = env->cpuid_level;
966
        get_cpuid_vendor(env, ebx, ecx, edx);
967
        break;
968
    case 1:
969
        *eax = env->cpuid_version;
970
        *ebx = (env->cpuid_apic_id << 24) | 8 << 8; /* CLFLUSH size in quad words, Linux wants it. */
971
        *ecx = env->cpuid_ext_features;
972
        *edx = env->cpuid_features;
973
        if (env->nr_cores * env->nr_threads > 1) {
974
            *ebx |= (env->nr_cores * env->nr_threads) << 16;
975
            *edx |= 1 << 28;    /* HTT bit */
976
        }
977
        break;
978
    case 2:
979
        /* cache info: needed for Pentium Pro compatibility */
980
        *eax = 1;
981
        *ebx = 0;
982
        *ecx = 0;
983
        *edx = 0x2c307d;
984
        break;
985
    case 4:
986
        /* cache info: needed for Core compatibility */
987
        if (env->nr_cores > 1) {
988
                *eax = (env->nr_cores - 1) << 26;
989
        } else {
990
                *eax = 0;
991
        }
992
        switch (count) {
993
            case 0: /* L1 dcache info */
994
                *eax |= 0x0000121;
995
                *ebx = 0x1c0003f;
996
                *ecx = 0x000003f;
997
                *edx = 0x0000001;
998
                break;
999
            case 1: /* L1 icache info */
1000
                *eax |= 0x0000122;
1001
                *ebx = 0x1c0003f;
1002
                *ecx = 0x000003f;
1003
                *edx = 0x0000001;
1004
                break;
1005
            case 2: /* L2 cache info */
1006
                *eax |= 0x0000143;
1007
                if (env->nr_threads > 1) {
1008
                    *eax |= (env->nr_threads - 1) << 14;
1009
                }
1010
                *ebx = 0x3c0003f;
1011
                *ecx = 0x0000fff;
1012
                *edx = 0x0000001;
1013
                break;
1014
            default: /* end of info */
1015
                *eax = 0;
1016
                *ebx = 0;
1017
                *ecx = 0;
1018
                *edx = 0;
1019
                break;
1020
        }
1021
        break;
1022
    case 5:
1023
        /* mwait info: needed for Core compatibility */
1024
        *eax = 0; /* Smallest monitor-line size in bytes */
1025
        *ebx = 0; /* Largest monitor-line size in bytes */
1026
        *ecx = CPUID_MWAIT_EMX | CPUID_MWAIT_IBE;
1027
        *edx = 0;
1028
        break;
1029
    case 6:
1030
        /* Thermal and Power Leaf */
1031
        *eax = 0;
1032
        *ebx = 0;
1033
        *ecx = 0;
1034
        *edx = 0;
1035
        break;
1036
    case 9:
1037
        /* Direct Cache Access Information Leaf */
1038
        *eax = 0; /* Bits 0-31 in DCA_CAP MSR */
1039
        *ebx = 0;
1040
        *ecx = 0;
1041
        *edx = 0;
1042
        break;
1043
    case 0xA:
1044
        /* Architectural Performance Monitoring Leaf */
1045
        *eax = 0;
1046
        *ebx = 0;
1047
        *ecx = 0;
1048
        *edx = 0;
1049
        break;
1050
    case 0x80000000:
1051
        *eax = env->cpuid_xlevel;
1052
        *ebx = env->cpuid_vendor1;
1053
        *edx = env->cpuid_vendor2;
1054
        *ecx = env->cpuid_vendor3;
1055
        break;
1056
    case 0x80000001:
1057
        *eax = env->cpuid_version;
1058
        *ebx = 0;
1059
        *ecx = env->cpuid_ext3_features;
1060
        *edx = env->cpuid_ext2_features;
1061

    
1062
        /* The Linux kernel checks for the CMPLegacy bit and
1063
         * discards multiple thread information if it is set.
1064
         * So dont set it here for Intel to make Linux guests happy.
1065
         */
1066
        if (env->nr_cores * env->nr_threads > 1) {
1067
            uint32_t tebx, tecx, tedx;
1068
            get_cpuid_vendor(env, &tebx, &tecx, &tedx);
1069
            if (tebx != CPUID_VENDOR_INTEL_1 ||
1070
                tedx != CPUID_VENDOR_INTEL_2 ||
1071
                tecx != CPUID_VENDOR_INTEL_3) {
1072
                *ecx |= 1 << 1;    /* CmpLegacy bit */
1073
            }
1074
        }
1075

    
1076
        if (kvm_enabled()) {
1077
            /* Nested SVM not yet supported in upstream QEMU */
1078
            *ecx &= ~CPUID_EXT3_SVM;
1079
        }
1080
        break;
1081
    case 0x80000002:
1082
    case 0x80000003:
1083
    case 0x80000004:
1084
        *eax = env->cpuid_model[(index - 0x80000002) * 4 + 0];
1085
        *ebx = env->cpuid_model[(index - 0x80000002) * 4 + 1];
1086
        *ecx = env->cpuid_model[(index - 0x80000002) * 4 + 2];
1087
        *edx = env->cpuid_model[(index - 0x80000002) * 4 + 3];
1088
        break;
1089
    case 0x80000005:
1090
        /* cache info (L1 cache) */
1091
        *eax = 0x01ff01ff;
1092
        *ebx = 0x01ff01ff;
1093
        *ecx = 0x40020140;
1094
        *edx = 0x40020140;
1095
        break;
1096
    case 0x80000006:
1097
        /* cache info (L2 cache) */
1098
        *eax = 0;
1099
        *ebx = 0x42004200;
1100
        *ecx = 0x02008140;
1101
        *edx = 0;
1102
        break;
1103
    case 0x80000008:
1104
        /* virtual & phys address size in low 2 bytes. */
1105
/* XXX: This value must match the one used in the MMU code. */
1106
        if (env->cpuid_ext2_features & CPUID_EXT2_LM) {
1107
            /* 64 bit processor */
1108
/* XXX: The physical address space is limited to 42 bits in exec.c. */
1109
            *eax = 0x00003028;        /* 48 bits virtual, 40 bits physical */
1110
        } else {
1111
            if (env->cpuid_features & CPUID_PSE36)
1112
                *eax = 0x00000024; /* 36 bits physical */
1113
            else
1114
                *eax = 0x00000020; /* 32 bits physical */
1115
        }
1116
        *ebx = 0;
1117
        *ecx = 0;
1118
        *edx = 0;
1119
        if (env->nr_cores * env->nr_threads > 1) {
1120
            *ecx |= (env->nr_cores * env->nr_threads) - 1;
1121
        }
1122
        break;
1123
    case 0x8000000A:
1124
        *eax = 0x00000001; /* SVM Revision */
1125
        *ebx = 0x00000010; /* nr of ASIDs */
1126
        *ecx = 0;
1127
        *edx = 0; /* optional features */
1128
        break;
1129
    default:
1130
        /* reserved values: zero */
1131
        *eax = 0;
1132
        *ebx = 0;
1133
        *ecx = 0;
1134
        *edx = 0;
1135
        break;
1136
    }
1137
}