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Set cpuid definition to 0 before initializing it
[qemu/mdroth.git] / target-i386 / cpuid.c
blob3fcf78f093abbdcc9a5cc4f74ddde14f332efc2e
1 /*
2 * i386 CPUID helper functions
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
19 #include <stdlib.h>
20 #include <stdio.h>
21 #include <string.h>
22 #include <inttypes.h>
23
24 #include "cpu.h"
25 #include "kvm.h"
26
27 #include "qemu-option.h"
28 #include "qemu-config.h"
29
30 /* feature flags taken from "Intel Processor Identification and the CPUID
31 * Instruction" and AMD's "CPUID Specification". In cases of disagreement
32 * between feature naming conventions, aliases may be added.
33 */
34 static const char *feature_name[] = {
35 "fpu", "vme", "de", "pse",
36 "tsc", "msr", "pae", "mce",
37 "cx8", "apic", NULL, "sep",
38 "mtrr", "pge", "mca", "cmov",
39 "pat", "pse36", "pn" /* Intel psn */, "clflush" /* Intel clfsh */,
40 NULL, "ds" /* Intel dts */, "acpi", "mmx",
41 "fxsr", "sse", "sse2", "ss",
42 "ht" /* Intel htt */, "tm", "ia64", "pbe",
43 };
44 static const char *ext_feature_name[] = {
45 "pni|sse3" /* Intel,AMD sse3 */, "pclmuldq", "dtes64", "monitor",
46 "ds_cpl", "vmx", "smx", "est",
47 "tm2", "ssse3", "cid", NULL,
48 "fma", "cx16", "xtpr", "pdcm",
49 NULL, NULL, "dca", "sse4.1|sse4_1",
50 "sse4.2|sse4_2", "x2apic", "movbe", "popcnt",
51 NULL, "aes", "xsave", "osxsave",
52 "avx", NULL, NULL, "hypervisor",
53 };
54 static const char *ext2_feature_name[] = {
55 "fpu", "vme", "de", "pse",
56 "tsc", "msr", "pae", "mce",
57 "cx8" /* AMD CMPXCHG8B */, "apic", NULL, "syscall",
58 "mtrr", "pge", "mca", "cmov",
59 "pat", "pse36", NULL, NULL /* Linux mp */,
60 "nx" /* Intel xd */, NULL, "mmxext", "mmx",
61 "fxsr", "fxsr_opt" /* AMD ffxsr */, "pdpe1gb" /* AMD Page1GB */, "rdtscp",
62 NULL, "lm" /* Intel 64 */, "3dnowext", "3dnow",
63 };
64 static const char *ext3_feature_name[] = {
65 "lahf_lm" /* AMD LahfSahf */, "cmp_legacy", "svm", "extapic" /* AMD ExtApicSpace */,
66 "cr8legacy" /* AMD AltMovCr8 */, "abm", "sse4a", "misalignsse",
67 "3dnowprefetch", "osvw", "ibs", "xop",
68 "skinit", "wdt", NULL, NULL,
69 "fma4", NULL, "cvt16", "nodeid_msr",
70 NULL, NULL, NULL, NULL,
71 NULL, NULL, NULL, NULL,
72 NULL, NULL, NULL, NULL,
73 };
74
75 static const char *kvm_feature_name[] = {
76 "kvmclock", "kvm_nopiodelay", "kvm_mmu", NULL, NULL, NULL, NULL, NULL,
77 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
78 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
79 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,
96 uint32_t *eax, uint32_t *ebx,
97 uint32_t *ecx, uint32_t *edx)
98 {
99 #if defined(CONFIG_KVM)
100 uint32_t vec[4];
101
102 #ifdef __x86_64__
103 asm volatile("cpuid"
104 : "=a"(vec[0]), "=b"(vec[1]),
105 "=c"(vec[2]), "=d"(vec[3])
106 : "0"(function), "c"(count) : "cc");
107 #else
108 asm volatile("pusha \n\t"
109 "cpuid \n\t"
110 "mov %%eax, 0(%2) \n\t"
111 "mov %%ebx, 4(%2) \n\t"
112 "mov %%ecx, 8(%2) \n\t"
113 "mov %%edx, 12(%2) \n\t"
114 "popa"
115 : : "a"(function), "c"(count), "S"(vec)
116 : "memory", "cc");
117 #endif
118
119 if (eax)
120 *eax = vec[0];
121 if (ebx)
122 *ebx = vec[1];
123 if (ecx)
124 *ecx = vec[2];
125 if (edx)
126 *edx = vec[3];
127 #endif
128 }
129
130 #define iswhite(c) ((c) && ((c) <= ' ' || '~' < (c)))
131
132 /* general substring compare of *[s1..e1) and *[s2..e2). sx is start of
133 * a substring. ex if !NULL points to the first char after a substring,
134 * otherwise the string is assumed to sized by a terminating nul.
135 * Return lexical ordering of *s1:*s2.
136 */
137 static int sstrcmp(const char *s1, const char *e1, const char *s2,
138 const char *e2)
139 {
140 for (;;) {
141 if (!*s1 || !*s2 || *s1 != *s2)
142 return (*s1 - *s2);
143 ++s1, ++s2;
144 if (s1 == e1 && s2 == e2)
145 return (0);
146 else if (s1 == e1)
147 return (*s2);
148 else if (s2 == e2)
149 return (*s1);
150 }
151 }
152
153 /* compare *[s..e) to *altstr. *altstr may be a simple string or multiple
154 * '|' delimited (possibly empty) strings in which case search for a match
155 * within the alternatives proceeds left to right. Return 0 for success,
156 * non-zero otherwise.
157 */
158 static int altcmp(const char *s, const char *e, const char *altstr)
159 {
160 const char *p, *q;
161
162 for (q = p = altstr; ; ) {
163 while (*p && *p != '|')
164 ++p;
165 if ((q == p && !*s) || (q != p && !sstrcmp(s, e, q, p)))
166 return (0);
167 if (!*p)
168 return (1);
169 else
170 q = ++p;
171 }
172 }
173
174 /* search featureset for flag *[s..e), if found set corresponding bit in
175 * *pval and return success, otherwise return zero
176 */
177 static int lookup_feature(uint32_t *pval, const char *s, const char *e,
178 const char **featureset)
179 {
180 uint32_t mask;
181 const char **ppc;
182
183 for (mask = 1, ppc = featureset; mask; mask <<= 1, ++ppc)
184 if (*ppc && !altcmp(s, e, *ppc)) {
185 *pval |= mask;
186 break;
187 }
188 return (mask ? 1 : 0);
189 }
190
191 static void add_flagname_to_bitmaps(const char *flagname, uint32_t *features,
192 uint32_t *ext_features,
193 uint32_t *ext2_features,
194 uint32_t *ext3_features,
195 uint32_t *kvm_features)
196 {
197 if (!lookup_feature(features, flagname, NULL, feature_name) &&
198 !lookup_feature(ext_features, flagname, NULL, ext_feature_name) &&
199 !lookup_feature(ext2_features, flagname, NULL, ext2_feature_name) &&
200 !lookup_feature(ext3_features, flagname, NULL, ext3_feature_name) &&
201 !lookup_feature(kvm_features, flagname, NULL, kvm_feature_name))
202 fprintf(stderr, "CPU feature %s not found\n", flagname);
203 }
204
205 typedef struct x86_def_t {
206 struct x86_def_t *next;
207 const char *name;
208 uint32_t level;
209 uint32_t vendor1, vendor2, vendor3;
210 int family;
211 int model;
212 int stepping;
213 uint32_t features, ext_features, ext2_features, ext3_features, kvm_features;
214 uint32_t xlevel;
215 char model_id[48];
216 int vendor_override;
217 uint32_t flags;
218 } x86_def_t;
219
220 #define I486_FEATURES (CPUID_FP87 | CPUID_VME | CPUID_PSE)
221 #define PENTIUM_FEATURES (I486_FEATURES | CPUID_DE | CPUID_TSC | \
222 CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_MMX | CPUID_APIC)
223 #define PENTIUM2_FEATURES (PENTIUM_FEATURES | CPUID_PAE | CPUID_SEP | \
224 CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | CPUID_PAT | \
225 CPUID_PSE36 | CPUID_FXSR)
226 #define PENTIUM3_FEATURES (PENTIUM2_FEATURES | CPUID_SSE)
227 #define PPRO_FEATURES (CPUID_FP87 | CPUID_DE | CPUID_PSE | CPUID_TSC | \
228 CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_PGE | CPUID_CMOV | \
229 CPUID_PAT | CPUID_FXSR | CPUID_MMX | CPUID_SSE | CPUID_SSE2 | \
230 CPUID_PAE | CPUID_SEP | CPUID_APIC)
231 #define EXT2_FEATURE_MASK 0x0183F3FF
232
233 #define TCG_FEATURES (CPUID_FP87 | CPUID_PSE | CPUID_TSC | CPUID_MSR | \
234 CPUID_PAE | CPUID_MCE | CPUID_CX8 | CPUID_APIC | CPUID_SEP | \
235 CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | CPUID_PAT | \
236 CPUID_PSE36 | CPUID_CLFLUSH | CPUID_ACPI | CPUID_MMX | \
237 CPUID_FXSR | CPUID_SSE | CPUID_SSE2 | CPUID_SS)
238 /* partly implemented:
239 CPUID_MTRR, CPUID_MCA, CPUID_CLFLUSH (needed for Win64)
240 CPUID_PSE36 (needed for Solaris) */
241 /* missing:
242 CPUID_VME, CPUID_DTS, CPUID_SS, CPUID_HT, CPUID_TM, CPUID_PBE */
243 #define TCG_EXT_FEATURES (CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | \
244 CPUID_EXT_CX16 | CPUID_EXT_POPCNT | \
245 CPUID_EXT_HYPERVISOR)
246 /* missing:
247 CPUID_EXT_DTES64, CPUID_EXT_DSCPL, CPUID_EXT_VMX, CPUID_EXT_EST,
248 CPUID_EXT_TM2, CPUID_EXT_XTPR, CPUID_EXT_PDCM, CPUID_EXT_XSAVE */
249 #define TCG_EXT2_FEATURES ((TCG_FEATURES & EXT2_FEATURE_MASK) | \
250 CPUID_EXT2_NX | CPUID_EXT2_MMXEXT | CPUID_EXT2_RDTSCP | \
251 CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT)
252 /* missing:
253 CPUID_EXT2_PDPE1GB */
254 #define TCG_EXT3_FEATURES (CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM | \
255 CPUID_EXT3_CR8LEG | CPUID_EXT3_ABM | CPUID_EXT3_SSE4A)
256
257 /* maintains list of cpu model definitions
258 */
259 static x86_def_t *x86_defs = {NULL};
260
261 /* built-in cpu model definitions (deprecated)
262 */
263 static x86_def_t builtin_x86_defs[] = {
264 {
265 .name = "qemu64",
266 .level = 4,
267 .vendor1 = CPUID_VENDOR_AMD_1,
268 .vendor2 = CPUID_VENDOR_AMD_2,
269 .vendor3 = CPUID_VENDOR_AMD_3,
270 .family = 6,
271 .model = 2,
272 .stepping = 3,
273 .features = PPRO_FEATURES |
274 CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
275 CPUID_PSE36,
276 .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16 | CPUID_EXT_POPCNT,
277 .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
278 CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
279 .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
280 CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
281 .xlevel = 0x8000000A,
282 .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
283 },
284 {
285 .name = "phenom",
286 .level = 5,
287 .vendor1 = CPUID_VENDOR_AMD_1,
288 .vendor2 = CPUID_VENDOR_AMD_2,
289 .vendor3 = CPUID_VENDOR_AMD_3,
290 .family = 16,
291 .model = 2,
292 .stepping = 3,
293 .features = PPRO_FEATURES |
294 CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
295 CPUID_PSE36 | CPUID_VME | CPUID_HT,
296 .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_CX16 |
297 CPUID_EXT_POPCNT,
298 .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
299 CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX |
300 CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT | CPUID_EXT2_MMXEXT |
301 CPUID_EXT2_FFXSR | CPUID_EXT2_PDPE1GB | CPUID_EXT2_RDTSCP,
302 /* Missing: CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
303 CPUID_EXT3_CR8LEG,
304 CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
305 CPUID_EXT3_OSVW, CPUID_EXT3_IBS */
306 .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
307 CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
308 .xlevel = 0x8000001A,
309 .model_id = "AMD Phenom(tm) 9550 Quad-Core Processor"
310 },
311 {
312 .name = "core2duo",
313 .level = 10,
314 .family = 6,
315 .model = 15,
316 .stepping = 11,
317 .features = PPRO_FEATURES |
318 CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
319 CPUID_PSE36 | CPUID_VME | CPUID_DTS | CPUID_ACPI | CPUID_SS |
320 CPUID_HT | CPUID_TM | CPUID_PBE,
321 .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
322 CPUID_EXT_DTES64 | CPUID_EXT_DSCPL | CPUID_EXT_VMX | CPUID_EXT_EST |
323 CPUID_EXT_TM2 | CPUID_EXT_CX16 | CPUID_EXT_XTPR | CPUID_EXT_PDCM,
324 .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
325 .ext3_features = CPUID_EXT3_LAHF_LM,
326 .xlevel = 0x80000008,
327 .model_id = "Intel(R) Core(TM)2 Duo CPU T7700 @ 2.40GHz",
328 },
329 {
330 .name = "kvm64",
331 .level = 5,
332 .vendor1 = CPUID_VENDOR_INTEL_1,
333 .vendor2 = CPUID_VENDOR_INTEL_2,
334 .vendor3 = CPUID_VENDOR_INTEL_3,
335 .family = 15,
336 .model = 6,
337 .stepping = 1,
338 /* Missing: CPUID_VME, CPUID_HT */
339 .features = PPRO_FEATURES |
340 CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
341 CPUID_PSE36,
342 /* Missing: CPUID_EXT_POPCNT, CPUID_EXT_MONITOR */
343 .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16,
344 /* Missing: CPUID_EXT2_PDPE1GB, CPUID_EXT2_RDTSCP */
345 .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
346 CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
347 /* Missing: CPUID_EXT3_LAHF_LM, CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
348 CPUID_EXT3_CR8LEG, CPUID_EXT3_ABM, CPUID_EXT3_SSE4A,
349 CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
350 CPUID_EXT3_OSVW, CPUID_EXT3_IBS, CPUID_EXT3_SVM */
351 .ext3_features = 0,
352 .xlevel = 0x80000008,
353 .model_id = "Common KVM processor"
354 },
355 {
356 .name = "qemu32",
357 .level = 4,
358 .family = 6,
359 .model = 3,
360 .stepping = 3,
361 .features = PPRO_FEATURES,
362 .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_POPCNT,
363 .xlevel = 0x80000004,
364 .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
365 },
366 {
367 .name = "kvm32",
368 .level = 5,
369 .family = 15,
370 .model = 6,
371 .stepping = 1,
372 .features = PPRO_FEATURES |
373 CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_PSE36,
374 .ext_features = CPUID_EXT_SSE3,
375 .ext2_features = PPRO_FEATURES & EXT2_FEATURE_MASK,
376 .ext3_features = 0,
377 .xlevel = 0x80000008,
378 .model_id = "Common 32-bit KVM processor"
379 },
380 {
381 .name = "coreduo",
382 .level = 10,
383 .family = 6,
384 .model = 14,
385 .stepping = 8,
386 .features = PPRO_FEATURES | CPUID_VME |
387 CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_DTS | CPUID_ACPI |
388 CPUID_SS | CPUID_HT | CPUID_TM | CPUID_PBE,
389 .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_VMX |
390 CPUID_EXT_EST | CPUID_EXT_TM2 | CPUID_EXT_XTPR | CPUID_EXT_PDCM,
391 .ext2_features = CPUID_EXT2_NX,
392 .xlevel = 0x80000008,
393 .model_id = "Genuine Intel(R) CPU T2600 @ 2.16GHz",
394 },
395 {
396 .name = "486",
397 .level = 1,
398 .family = 4,
399 .model = 0,
400 .stepping = 0,
401 .features = I486_FEATURES,
402 .xlevel = 0,
403 },
404 {
405 .name = "pentium",
406 .level = 1,
407 .family = 5,
408 .model = 4,
409 .stepping = 3,
410 .features = PENTIUM_FEATURES,
411 .xlevel = 0,
412 },
413 {
414 .name = "pentium2",
415 .level = 2,
416 .family = 6,
417 .model = 5,
418 .stepping = 2,
419 .features = PENTIUM2_FEATURES,
420 .xlevel = 0,
421 },
422 {
423 .name = "pentium3",
424 .level = 2,
425 .family = 6,
426 .model = 7,
427 .stepping = 3,
428 .features = PENTIUM3_FEATURES,
429 .xlevel = 0,
430 },
431 {
432 .name = "athlon",
433 .level = 2,
434 .vendor1 = CPUID_VENDOR_AMD_1,
435 .vendor2 = CPUID_VENDOR_AMD_2,
436 .vendor3 = CPUID_VENDOR_AMD_3,
437 .family = 6,
438 .model = 2,
439 .stepping = 3,
440 .features = PPRO_FEATURES | CPUID_PSE36 | CPUID_VME | CPUID_MTRR | CPUID_MCA,
441 .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) | CPUID_EXT2_MMXEXT | CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT,
442 .xlevel = 0x80000008,
443 /* XXX: put another string ? */
444 .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
445 },
446 {
447 .name = "n270",
448 /* original is on level 10 */
449 .level = 5,
450 .family = 6,
451 .model = 28,
452 .stepping = 2,
453 .features = PPRO_FEATURES |
454 CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_VME | CPUID_DTS |
455 CPUID_ACPI | CPUID_SS | CPUID_HT | CPUID_TM | CPUID_PBE,
456 /* Some CPUs got no CPUID_SEP */
457 .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
458 CPUID_EXT_DSCPL | CPUID_EXT_EST | CPUID_EXT_TM2 | CPUID_EXT_XTPR,
459 .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) | CPUID_EXT2_NX,
460 .ext3_features = CPUID_EXT3_LAHF_LM,
461 .xlevel = 0x8000000A,
462 .model_id = "Intel(R) Atom(TM) CPU N270 @ 1.60GHz",
463 },
464 };
465
466 static int cpu_x86_fill_model_id(char *str)
467 {
468 uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
469 int i;
470
471 for (i = 0; i < 3; i++) {
472 host_cpuid(0x80000002 + i, 0, &eax, &ebx, &ecx, &edx);
473 memcpy(str + i * 16 + 0, &eax, 4);
474 memcpy(str + i * 16 + 4, &ebx, 4);
475 memcpy(str + i * 16 + 8, &ecx, 4);
476 memcpy(str + i * 16 + 12, &edx, 4);
477 }
478 return 0;
479 }
480
481 static int cpu_x86_fill_host(x86_def_t *x86_cpu_def)
482 {
483 uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
484
485 x86_cpu_def->name = "host";
486 host_cpuid(0x0, 0, &eax, &ebx, &ecx, &edx);
487 x86_cpu_def->level = eax;
488 x86_cpu_def->vendor1 = ebx;
489 x86_cpu_def->vendor2 = edx;
490 x86_cpu_def->vendor3 = ecx;
491
492 host_cpuid(0x1, 0, &eax, &ebx, &ecx, &edx);
493 x86_cpu_def->family = ((eax >> 8) & 0x0F) + ((eax >> 20) & 0xFF);
494 x86_cpu_def->model = ((eax >> 4) & 0x0F) | ((eax & 0xF0000) >> 12);
495 x86_cpu_def->stepping = eax & 0x0F;
496 x86_cpu_def->ext_features = ecx;
497 x86_cpu_def->features = edx;
498
499 host_cpuid(0x80000000, 0, &eax, &ebx, &ecx, &edx);
500 x86_cpu_def->xlevel = eax;
501
502 host_cpuid(0x80000001, 0, &eax, &ebx, &ecx, &edx);
503 x86_cpu_def->ext2_features = edx;
504 x86_cpu_def->ext3_features = ecx;
505 cpu_x86_fill_model_id(x86_cpu_def->model_id);
506 x86_cpu_def->vendor_override = 0;
507
508 return 0;
509 }
510
511 static int unavailable_host_feature(struct model_features_t *f, uint32_t mask)
512 {
513 int i;
514
515 for (i = 0; i < 32; ++i)
516 if (1 << i & mask) {
517 fprintf(stderr, "warning: host cpuid %04x_%04x lacks requested"
518 " flag '%s' [0x%08x]\n",
519 f->cpuid >> 16, f->cpuid & 0xffff,
520 f->flag_names[i] ? f->flag_names[i] : "[reserved]", mask);
521 break;
522 }
523 return 0;
524 }
525
526 /* best effort attempt to inform user requested cpu flags aren't making
527 * their way to the guest. Note: ft[].check_feat ideally should be
528 * specified via a guest_def field to suppress report of extraneous flags.
529 */
530 static int check_features_against_host(x86_def_t *guest_def)
531 {
532 x86_def_t host_def;
533 uint32_t mask;
534 int rv, i;
535 struct model_features_t ft[] = {
536 {&guest_def->features, &host_def.features,
537 ~0, feature_name, 0x00000000},
538 {&guest_def->ext_features, &host_def.ext_features,
539 ~CPUID_EXT_HYPERVISOR, ext_feature_name, 0x00000001},
540 {&guest_def->ext2_features, &host_def.ext2_features,
541 ~PPRO_FEATURES, ext2_feature_name, 0x80000000},
542 {&guest_def->ext3_features, &host_def.ext3_features,
543 ~CPUID_EXT3_SVM, ext3_feature_name, 0x80000001}};
544
545 cpu_x86_fill_host(&host_def);
546 for (rv = 0, i = 0; i < ARRAY_SIZE(ft); ++i)
547 for (mask = 1; mask; mask <<= 1)
548 if (ft[i].check_feat & mask && *ft[i].guest_feat & mask &&
549 !(*ft[i].host_feat & mask)) {
550 unavailable_host_feature(&ft[i], mask);
551 rv = 1;
552 }
553 return rv;
554 }
555
556 static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model)
557 {
558 unsigned int i;
559 x86_def_t *def;
560
561 char *s = strdup(cpu_model);
562 char *featurestr, *name = strtok(s, ",");
563 uint32_t plus_features = 0, plus_ext_features = 0, plus_ext2_features = 0, plus_ext3_features = 0, plus_kvm_features = 0;
564 uint32_t minus_features = 0, minus_ext_features = 0, minus_ext2_features = 0, minus_ext3_features = 0, minus_kvm_features = 0;
565 uint32_t numvalue;
566
567 for (def = x86_defs; def; def = def->next)
568 if (!strcmp(name, def->name))
569 break;
570 if (kvm_enabled() && strcmp(name, "host") == 0) {
571 cpu_x86_fill_host(x86_cpu_def);
572 } else if (!def) {
573 goto error;
574 } else {
575 memcpy(x86_cpu_def, def, sizeof(*def));
576 }
577
578 plus_kvm_features = ~0; /* not supported bits will be filtered out later */
579
580 add_flagname_to_bitmaps("hypervisor", &plus_features,
581 &plus_ext_features, &plus_ext2_features, &plus_ext3_features,
582 &plus_kvm_features);
583
584 featurestr = strtok(NULL, ",");
585
586 while (featurestr) {
587 char *val;
588 if (featurestr[0] == '+') {
589 add_flagname_to_bitmaps(featurestr + 1, &plus_features, &plus_ext_features, &plus_ext2_features, &plus_ext3_features, &plus_kvm_features);
590 } else if (featurestr[0] == '-') {
591 add_flagname_to_bitmaps(featurestr + 1, &minus_features, &minus_ext_features, &minus_ext2_features, &minus_ext3_features, &minus_kvm_features);
592 } else if ((val = strchr(featurestr, '='))) {
593 *val = 0; val++;
594 if (!strcmp(featurestr, "family")) {
595 char *err;
596 numvalue = strtoul(val, &err, 0);
597 if (!*val || *err) {
598 fprintf(stderr, "bad numerical value %s\n", val);
599 goto error;
600 }
601 x86_cpu_def->family = numvalue;
602 } else if (!strcmp(featurestr, "model")) {
603 char *err;
604 numvalue = strtoul(val, &err, 0);
605 if (!*val || *err || numvalue > 0xff) {
606 fprintf(stderr, "bad numerical value %s\n", val);
607 goto error;
608 }
609 x86_cpu_def->model = numvalue;
610 } else if (!strcmp(featurestr, "stepping")) {
611 char *err;
612 numvalue = strtoul(val, &err, 0);
613 if (!*val || *err || numvalue > 0xf) {
614 fprintf(stderr, "bad numerical value %s\n", val);
615 goto error;
616 }
617 x86_cpu_def->stepping = numvalue ;
618 } else if (!strcmp(featurestr, "level")) {
619 char *err;
620 numvalue = strtoul(val, &err, 0);
621 if (!*val || *err) {
622 fprintf(stderr, "bad numerical value %s\n", val);
623 goto error;
624 }
625 x86_cpu_def->level = numvalue;
626 } else if (!strcmp(featurestr, "xlevel")) {
627 char *err;
628 numvalue = strtoul(val, &err, 0);
629 if (!*val || *err) {
630 fprintf(stderr, "bad numerical value %s\n", val);
631 goto error;
632 }
633 if (numvalue < 0x80000000) {
634 numvalue += 0x80000000;
635 }
636 x86_cpu_def->xlevel = numvalue;
637 } else if (!strcmp(featurestr, "vendor")) {
638 if (strlen(val) != 12) {
639 fprintf(stderr, "vendor string must be 12 chars long\n");
640 goto error;
641 }
642 x86_cpu_def->vendor1 = 0;
643 x86_cpu_def->vendor2 = 0;
644 x86_cpu_def->vendor3 = 0;
645 for(i = 0; i < 4; i++) {
646 x86_cpu_def->vendor1 |= ((uint8_t)val[i ]) << (8 * i);
647 x86_cpu_def->vendor2 |= ((uint8_t)val[i + 4]) << (8 * i);
648 x86_cpu_def->vendor3 |= ((uint8_t)val[i + 8]) << (8 * i);
649 }
650 x86_cpu_def->vendor_override = 1;
651 } else if (!strcmp(featurestr, "model_id")) {
652 pstrcpy(x86_cpu_def->model_id, sizeof(x86_cpu_def->model_id),
653 val);
654 } else {
655 fprintf(stderr, "unrecognized feature %s\n", featurestr);
656 goto error;
657 }
658 } else if (!strcmp(featurestr, "check")) {
659 check_cpuid = 1;
660 } else if (!strcmp(featurestr, "enforce")) {
661 check_cpuid = enforce_cpuid = 1;
662 } else {
663 fprintf(stderr, "feature string `%s' not in format (+feature|-feature|feature=xyz)\n", featurestr);
664 goto error;
665 }
666 featurestr = strtok(NULL, ",");
667 }
668 x86_cpu_def->features |= plus_features;
669 x86_cpu_def->ext_features |= plus_ext_features;
670 x86_cpu_def->ext2_features |= plus_ext2_features;
671 x86_cpu_def->ext3_features |= plus_ext3_features;
672 x86_cpu_def->kvm_features |= plus_kvm_features;
673 x86_cpu_def->features &= ~minus_features;
674 x86_cpu_def->ext_features &= ~minus_ext_features;
675 x86_cpu_def->ext2_features &= ~minus_ext2_features;
676 x86_cpu_def->ext3_features &= ~minus_ext3_features;
677 x86_cpu_def->kvm_features &= ~minus_kvm_features;
678 if (check_cpuid) {
679 if (check_features_against_host(x86_cpu_def) && enforce_cpuid)
680 goto error;
681 }
682 free(s);
683 return 0;
684
685 error:
686 free(s);
687 return -1;
688 }
689
690 /* generate a composite string into buf of all cpuid names in featureset
691 * selected by fbits. indicate truncation at bufsize in the event of overflow.
692 * if flags, suppress names undefined in featureset.
693 */
694 static void listflags(char *buf, int bufsize, uint32_t fbits,
695 const char **featureset, uint32_t flags)
696 {
697 const char **p = &featureset[31];
698 char *q, *b, bit;
699 int nc;
700
701 b = 4 <= bufsize ? buf + (bufsize -= 3) - 1 : NULL;
702 *buf = '\0';
703 for (q = buf, bit = 31; fbits && bufsize; --p, fbits &= ~(1 << bit), --bit)
704 if (fbits & 1 << bit && (*p || !flags)) {
705 if (*p)
706 nc = snprintf(q, bufsize, "%s%s", q == buf ? "" : " ", *p);
707 else
708 nc = snprintf(q, bufsize, "%s[%d]", q == buf ? "" : " ", bit);
709 if (bufsize <= nc) {
710 if (b) {
711 memcpy(b, "...", sizeof("..."));
712 }
713 return;
714 }
715 q += nc;
716 bufsize -= nc;
717 }
718 }
719
720 /* generate CPU information:
721 * -? list model names
722 * -?model list model names/IDs
723 * -?dump output all model (x86_def_t) data
724 * -?cpuid list all recognized cpuid flag names
725 */
726 void x86_cpu_list (FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
727 const char *optarg)
728 {
729 unsigned char model = !strcmp("?model", optarg);
730 unsigned char dump = !strcmp("?dump", optarg);
731 unsigned char cpuid = !strcmp("?cpuid", optarg);
732 x86_def_t *def;
733 char buf[256];
734
735 if (cpuid) {
736 (*cpu_fprintf)(f, "Recognized CPUID flags:\n");
737 listflags(buf, sizeof (buf), (uint32_t)~0, feature_name, 1);
738 (*cpu_fprintf)(f, " f_edx: %s\n", buf);
739 listflags(buf, sizeof (buf), (uint32_t)~0, ext_feature_name, 1);
740 (*cpu_fprintf)(f, " f_ecx: %s\n", buf);
741 listflags(buf, sizeof (buf), (uint32_t)~0, ext2_feature_name, 1);
742 (*cpu_fprintf)(f, " extf_edx: %s\n", buf);
743 listflags(buf, sizeof (buf), (uint32_t)~0, ext3_feature_name, 1);
744 (*cpu_fprintf)(f, " extf_ecx: %s\n", buf);
745 return;
746 }
747 for (def = x86_defs; def; def = def->next) {
748 snprintf(buf, sizeof (buf), def->flags ? "[%s]": "%s", def->name);
749 if (model || dump) {
750 (*cpu_fprintf)(f, "x86 %16s %-48s\n", buf, def->model_id);
751 } else {
752 (*cpu_fprintf)(f, "x86 %16s\n", buf);
753 }
754 if (dump) {
755 memcpy(buf, &def->vendor1, sizeof (def->vendor1));
756 memcpy(buf + 4, &def->vendor2, sizeof (def->vendor2));
757 memcpy(buf + 8, &def->vendor3, sizeof (def->vendor3));
758 buf[12] = '\0';
759 (*cpu_fprintf)(f,
760 " family %d model %d stepping %d level %d xlevel 0x%x"
761 " vendor \"%s\"\n",
762 def->family, def->model, def->stepping, def->level,
763 def->xlevel, buf);
764 listflags(buf, sizeof (buf), def->features, feature_name, 0);
765 (*cpu_fprintf)(f, " feature_edx %08x (%s)\n", def->features,
766 buf);
767 listflags(buf, sizeof (buf), def->ext_features, ext_feature_name,
768 0);
769 (*cpu_fprintf)(f, " feature_ecx %08x (%s)\n", def->ext_features,
770 buf);
771 listflags(buf, sizeof (buf), def->ext2_features, ext2_feature_name,
772 0);
773 (*cpu_fprintf)(f, " extfeature_edx %08x (%s)\n",
774 def->ext2_features, buf);
775 listflags(buf, sizeof (buf), def->ext3_features, ext3_feature_name,
776 0);
777 (*cpu_fprintf)(f, " extfeature_ecx %08x (%s)\n",
778 def->ext3_features, buf);
779 (*cpu_fprintf)(f, "\n");
780 }
781 }
782 if (kvm_enabled()) {
783 (*cpu_fprintf)(f, "x86 %16s\n", "[host]");
784 }
785 }
786
787 int cpu_x86_register (CPUX86State *env, const char *cpu_model)
788 {
789 x86_def_t def1, *def = &def1;
790
791 memset(def, 0, sizeof(*def));
792
793 if (cpu_x86_find_by_name(def, cpu_model) < 0)
794 return -1;
795 if (def->vendor1) {
796 env->cpuid_vendor1 = def->vendor1;
797 env->cpuid_vendor2 = def->vendor2;
798 env->cpuid_vendor3 = def->vendor3;
799 } else {
800 env->cpuid_vendor1 = CPUID_VENDOR_INTEL_1;
801 env->cpuid_vendor2 = CPUID_VENDOR_INTEL_2;
802 env->cpuid_vendor3 = CPUID_VENDOR_INTEL_3;
803 }
804 env->cpuid_vendor_override = def->vendor_override;
805 env->cpuid_level = def->level;
806 if (def->family > 0x0f)
807 env->cpuid_version = 0xf00 | ((def->family - 0x0f) << 20);
808 else
809 env->cpuid_version = def->family << 8;
810 env->cpuid_version |= ((def->model & 0xf) << 4) | ((def->model >> 4) << 16);
811 env->cpuid_version |= def->stepping;
812 env->cpuid_features = def->features;
813 env->pat = 0x0007040600070406ULL;
814 env->cpuid_ext_features = def->ext_features;
815 env->cpuid_ext2_features = def->ext2_features;
816 env->cpuid_ext3_features = def->ext3_features;
817 env->cpuid_xlevel = def->xlevel;
818 env->cpuid_kvm_features = def->kvm_features;
819 if (!kvm_enabled()) {
820 env->cpuid_features &= TCG_FEATURES;
821 env->cpuid_ext_features &= TCG_EXT_FEATURES;
822 env->cpuid_ext2_features &= (TCG_EXT2_FEATURES
823 #ifdef TARGET_X86_64
824 | CPUID_EXT2_SYSCALL | CPUID_EXT2_LM
825 #endif
826 );
827 env->cpuid_ext3_features &= TCG_EXT3_FEATURES;
828 }
829 {
830 const char *model_id = def->model_id;
831 int c, len, i;
832 if (!model_id)
833 model_id = "";
834 len = strlen(model_id);
835 for(i = 0; i < 48; i++) {
836 if (i >= len)
837 c = '\0';
838 else
839 c = (uint8_t)model_id[i];
840 env->cpuid_model[i >> 2] |= c << (8 * (i & 3));
841 }
842 }
843 return 0;
844 }
845
846 #if !defined(CONFIG_USER_ONLY)
847 /* copy vendor id string to 32 bit register, nul pad as needed
848 */
849 static void cpyid(const char *s, uint32_t *id)
850 {
851 char *d = (char *)id;
852 char i;
853
854 for (i = sizeof (*id); i--; )
855 *d++ = *s ? *s++ : '\0';
856 }
857
858 /* interpret radix and convert from string to arbitrary scalar,
859 * otherwise flag failure
860 */
861 #define setscalar(pval, str, perr) \
862 { \
863 char *pend; \
864 unsigned long ul; \
865 \
866 ul = strtoul(str, &pend, 0); \
867 *str && !*pend ? (*pval = ul) : (*perr = 1); \
868 }
869
870 /* map cpuid options to feature bits, otherwise return failure
871 * (option tags in *str are delimited by whitespace)
872 */
873 static void setfeatures(uint32_t *pval, const char *str,
874 const char **featureset, int *perr)
875 {
876 const char *p, *q;
877
878 for (q = p = str; *p || *q; q = p) {
879 while (iswhite(*p))
880 q = ++p;
881 while (*p && !iswhite(*p))
882 ++p;
883 if (!*q && !*p)
884 return;
885 if (!lookup_feature(pval, q, p, featureset)) {
886 fprintf(stderr, "error: feature \"%.*s\" not available in set\n",
887 (int)(p - q), q);
888 *perr = 1;
889 return;
890 }
891 }
892 }
893
894 /* map config file options to x86_def_t form
895 */
896 static int cpudef_setfield(const char *name, const char *str, void *opaque)
897 {
898 x86_def_t *def = opaque;
899 int err = 0;
900
901 if (!strcmp(name, "name")) {
902 def->name = strdup(str);
903 } else if (!strcmp(name, "model_id")) {
904 strncpy(def->model_id, str, sizeof (def->model_id));
905 } else if (!strcmp(name, "level")) {
906 setscalar(&def->level, str, &err)
907 } else if (!strcmp(name, "vendor")) {
908 cpyid(&str[0], &def->vendor1);
909 cpyid(&str[4], &def->vendor2);
910 cpyid(&str[8], &def->vendor3);
911 } else if (!strcmp(name, "family")) {
912 setscalar(&def->family, str, &err)
913 } else if (!strcmp(name, "model")) {
914 setscalar(&def->model, str, &err)
915 } else if (!strcmp(name, "stepping")) {
916 setscalar(&def->stepping, str, &err)
917 } else if (!strcmp(name, "feature_edx")) {
918 setfeatures(&def->features, str, feature_name, &err);
919 } else if (!strcmp(name, "feature_ecx")) {
920 setfeatures(&def->ext_features, str, ext_feature_name, &err);
921 } else if (!strcmp(name, "extfeature_edx")) {
922 setfeatures(&def->ext2_features, str, ext2_feature_name, &err);
923 } else if (!strcmp(name, "extfeature_ecx")) {
924 setfeatures(&def->ext3_features, str, ext3_feature_name, &err);
925 } else if (!strcmp(name, "xlevel")) {
926 setscalar(&def->xlevel, str, &err)
927 } else {
928 fprintf(stderr, "error: unknown option [%s = %s]\n", name, str);
929 return (1);
930 }
931 if (err) {
932 fprintf(stderr, "error: bad option value [%s = %s]\n", name, str);
933 return (1);
934 }
935 return (0);
936 }
937
938 /* register config file entry as x86_def_t
939 */
940 static int cpudef_register(QemuOpts *opts, void *opaque)
941 {
942 x86_def_t *def = qemu_mallocz(sizeof (x86_def_t));
943
944 qemu_opt_foreach(opts, cpudef_setfield, def, 1);
945 def->next = x86_defs;
946 x86_defs = def;
947 return (0);
948 }
949
950 void cpu_clear_apic_feature(CPUX86State *env)
951 {
952 env->cpuid_features &= ~CPUID_APIC;
953 }
954
955 #endif /* !CONFIG_USER_ONLY */
956
957 /* register "cpudef" models defined in configuration file. Here we first
958 * preload any built-in definitions
959 */
960 void x86_cpudef_setup(void)
961 {
962 int i;
963
964 for (i = 0; i < ARRAY_SIZE(builtin_x86_defs); ++i) {
965 builtin_x86_defs[i].next = x86_defs;
966 builtin_x86_defs[i].flags = 1;
967 x86_defs = &builtin_x86_defs[i];
968 }
969 #if !defined(CONFIG_USER_ONLY)
970 qemu_opts_foreach(qemu_find_opts("cpudef"), cpudef_register, NULL, 0);
971 #endif
972 }
973
974 static void get_cpuid_vendor(CPUX86State *env, uint32_t *ebx,
975 uint32_t *ecx, uint32_t *edx)
976 {
977 *ebx = env->cpuid_vendor1;
978 *edx = env->cpuid_vendor2;
979 *ecx = env->cpuid_vendor3;
980
981 /* sysenter isn't supported on compatibility mode on AMD, syscall
982 * isn't supported in compatibility mode on Intel.
983 * Normally we advertise the actual cpu vendor, but you can override
984 * this if you want to use KVM's sysenter/syscall emulation
985 * in compatibility mode and when doing cross vendor migration
986 */
987 if (kvm_enabled() && ! env->cpuid_vendor_override) {
988 host_cpuid(0, 0, NULL, ebx, ecx, edx);
989 }
990 }
991
992 void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
993 uint32_t *eax, uint32_t *ebx,
994 uint32_t *ecx, uint32_t *edx)
995 {
996 /* test if maximum index reached */
997 if (index & 0x80000000) {
998 if (index > env->cpuid_xlevel)
999 index = env->cpuid_level;
1000 } else {
1001 if (index > env->cpuid_level)
1002 index = env->cpuid_level;
1003 }
1004
1005 switch(index) {
1006 case 0:
1007 *eax = env->cpuid_level;
1008 get_cpuid_vendor(env, ebx, ecx, edx);
1009 break;
1010 case 1:
1011 *eax = env->cpuid_version;
1012 *ebx = (env->cpuid_apic_id << 24) | 8 << 8; /* CLFLUSH size in quad words, Linux wants it. */
1013 *ecx = env->cpuid_ext_features;
1014 *edx = env->cpuid_features;
1015 if (env->nr_cores * env->nr_threads > 1) {
1016 *ebx |= (env->nr_cores * env->nr_threads) << 16;
1017 *edx |= 1 << 28; /* HTT bit */
1018 }
1019 break;
1020 case 2:
1021 /* cache info: needed for Pentium Pro compatibility */
1022 *eax = 1;
1023 *ebx = 0;
1024 *ecx = 0;
1025 *edx = 0x2c307d;
1026 break;
1027 case 4:
1028 /* cache info: needed for Core compatibility */
1029 if (env->nr_cores > 1) {
1030 *eax = (env->nr_cores - 1) << 26;
1031 } else {
1032 *eax = 0;
1033 }
1034 switch (count) {
1035 case 0: /* L1 dcache info */
1036 *eax |= 0x0000121;
1037 *ebx = 0x1c0003f;
1038 *ecx = 0x000003f;
1039 *edx = 0x0000001;
1040 break;
1041 case 1: /* L1 icache info */
1042 *eax |= 0x0000122;
1043 *ebx = 0x1c0003f;
1044 *ecx = 0x000003f;
1045 *edx = 0x0000001;
1046 break;
1047 case 2: /* L2 cache info */
1048 *eax |= 0x0000143;
1049 if (env->nr_threads > 1) {
1050 *eax |= (env->nr_threads - 1) << 14;
1051 }
1052 *ebx = 0x3c0003f;
1053 *ecx = 0x0000fff;
1054 *edx = 0x0000001;
1055 break;
1056 default: /* end of info */
1057 *eax = 0;
1058 *ebx = 0;
1059 *ecx = 0;
1060 *edx = 0;
1061 break;
1062 }
1063 break;
1064 case 5:
1065 /* mwait info: needed for Core compatibility */
1066 *eax = 0; /* Smallest monitor-line size in bytes */
1067 *ebx = 0; /* Largest monitor-line size in bytes */
1068 *ecx = CPUID_MWAIT_EMX | CPUID_MWAIT_IBE;
1069 *edx = 0;
1070 break;
1071 case 6:
1072 /* Thermal and Power Leaf */
1073 *eax = 0;
1074 *ebx = 0;
1075 *ecx = 0;
1076 *edx = 0;
1077 break;
1078 case 9:
1079 /* Direct Cache Access Information Leaf */
1080 *eax = 0; /* Bits 0-31 in DCA_CAP MSR */
1081 *ebx = 0;
1082 *ecx = 0;
1083 *edx = 0;
1084 break;
1085 case 0xA:
1086 /* Architectural Performance Monitoring Leaf */
1087 *eax = 0;
1088 *ebx = 0;
1089 *ecx = 0;
1090 *edx = 0;
1091 break;
1092 case 0xD:
1093 /* Processor Extended State */
1094 if (!(env->cpuid_ext_features & CPUID_EXT_XSAVE)) {
1095 *eax = 0;
1096 *ebx = 0;
1097 *ecx = 0;
1098 *edx = 0;
1099 break;
1100 }
1101 if (kvm_enabled()) {
1102 *eax = kvm_arch_get_supported_cpuid(env, 0xd, count, R_EAX);
1103 *ebx = kvm_arch_get_supported_cpuid(env, 0xd, count, R_EBX);
1104 *ecx = kvm_arch_get_supported_cpuid(env, 0xd, count, R_ECX);
1105 *edx = kvm_arch_get_supported_cpuid(env, 0xd, count, R_EDX);
1106 } else {
1107 *eax = 0;
1108 *ebx = 0;
1109 *ecx = 0;
1110 *edx = 0;
1111 }
1112 break;
1113 case 0x80000000:
1114 *eax = env->cpuid_xlevel;
1115 *ebx = env->cpuid_vendor1;
1116 *edx = env->cpuid_vendor2;
1117 *ecx = env->cpuid_vendor3;
1118 break;
1119 case 0x80000001:
1120 *eax = env->cpuid_version;
1121 *ebx = 0;
1122 *ecx = env->cpuid_ext3_features;
1123 *edx = env->cpuid_ext2_features;
1124
1125 /* The Linux kernel checks for the CMPLegacy bit and
1126 * discards multiple thread information if it is set.
1127 * So dont set it here for Intel to make Linux guests happy.
1128 */
1129 if (env->nr_cores * env->nr_threads > 1) {
1130 uint32_t tebx, tecx, tedx;
1131 get_cpuid_vendor(env, &tebx, &tecx, &tedx);
1132 if (tebx != CPUID_VENDOR_INTEL_1 ||
1133 tedx != CPUID_VENDOR_INTEL_2 ||
1134 tecx != CPUID_VENDOR_INTEL_3) {
1135 *ecx |= 1 << 1; /* CmpLegacy bit */
1136 }
1137 }
1138
1139 if (kvm_enabled()) {
1140 /* Nested SVM not yet supported in upstream QEMU */
1141 *ecx &= ~CPUID_EXT3_SVM;
1142 }
1143 break;
1144 case 0x80000002:
1145 case 0x80000003:
1146 case 0x80000004:
1147 *eax = env->cpuid_model[(index - 0x80000002) * 4 + 0];
1148 *ebx = env->cpuid_model[(index - 0x80000002) * 4 + 1];
1149 *ecx = env->cpuid_model[(index - 0x80000002) * 4 + 2];
1150 *edx = env->cpuid_model[(index - 0x80000002) * 4 + 3];
1151 break;
1152 case 0x80000005:
1153 /* cache info (L1 cache) */
1154 *eax = 0x01ff01ff;
1155 *ebx = 0x01ff01ff;
1156 *ecx = 0x40020140;
1157 *edx = 0x40020140;
1158 break;
1159 case 0x80000006:
1160 /* cache info (L2 cache) */
1161 *eax = 0;
1162 *ebx = 0x42004200;
1163 *ecx = 0x02008140;
1164 *edx = 0;
1165 break;
1166 case 0x80000008:
1167 /* virtual & phys address size in low 2 bytes. */
1168 /* XXX: This value must match the one used in the MMU code. */
1169 if (env->cpuid_ext2_features & CPUID_EXT2_LM) {
1170 /* 64 bit processor */
1171 /* XXX: The physical address space is limited to 42 bits in exec.c. */
1172 *eax = 0x00003028; /* 48 bits virtual, 40 bits physical */
1173 } else {
1174 if (env->cpuid_features & CPUID_PSE36)
1175 *eax = 0x00000024; /* 36 bits physical */
1176 else
1177 *eax = 0x00000020; /* 32 bits physical */
1178 }
1179 *ebx = 0;
1180 *ecx = 0;
1181 *edx = 0;
1182 if (env->nr_cores * env->nr_threads > 1) {
1183 *ecx |= (env->nr_cores * env->nr_threads) - 1;
1184 }
1185 break;
1186 case 0x8000000A:
1187 *eax = 0x00000001; /* SVM Revision */
1188 *ebx = 0x00000010; /* nr of ASIDs */
1189 *ecx = 0;
1190 *edx = 0; /* optional features */
1191 break;
1192 default:
1193 /* reserved values: zero */
1194 *eax = 0;
1195 *ebx = 0;
1196 *ecx = 0;
1197 *edx = 0;
1198 break;
1199 }
1200 }
various patches