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Merge branch 'master' of git://git.qemu.org/qemu
[qemu/mdroth.git] / target-i386 / cpuid.c
blob1e8bcff65dbaeb9112ccda0146ebd82b38fcec68
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", "kvmclock", "kvm_asyncpf", 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 static const char *svm_feature_name[] = {
83 "npt", "lbrv", "svm_lock", "nrip_save",
84 "tsc_scale", "vmcb_clean", "flushbyasid", "decodeassists",
85 NULL, NULL, "pause_filter", NULL,
86 "pfthreshold", NULL, NULL, NULL,
87 NULL, NULL, NULL, NULL,
88 NULL, NULL, NULL, NULL,
89 NULL, NULL, NULL, NULL,
90 NULL, NULL, NULL, NULL,
91 };
92
93 /* collects per-function cpuid data
94 */
95 typedef struct model_features_t {
96 uint32_t *guest_feat;
97 uint32_t *host_feat;
98 uint32_t check_feat;
99 const char **flag_names;
100 uint32_t cpuid;
101 } model_features_t;
102
103 int check_cpuid = 0;
104 int enforce_cpuid = 0;
105
106 void host_cpuid(uint32_t function, uint32_t count,
107 uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
108 {
109 #if defined(CONFIG_KVM)
110 uint32_t vec[4];
111
112 #ifdef __x86_64__
113 asm volatile("cpuid"
114 : "=a"(vec[0]), "=b"(vec[1]),
115 "=c"(vec[2]), "=d"(vec[3])
116 : "0"(function), "c"(count) : "cc");
117 #else
118 asm volatile("pusha \n\t"
119 "cpuid \n\t"
120 "mov %%eax, 0(%2) \n\t"
121 "mov %%ebx, 4(%2) \n\t"
122 "mov %%ecx, 8(%2) \n\t"
123 "mov %%edx, 12(%2) \n\t"
124 "popa"
125 : : "a"(function), "c"(count), "S"(vec)
126 : "memory", "cc");
127 #endif
128
129 if (eax)
130 *eax = vec[0];
131 if (ebx)
132 *ebx = vec[1];
133 if (ecx)
134 *ecx = vec[2];
135 if (edx)
136 *edx = vec[3];
137 #endif
138 }
139
140 #define iswhite(c) ((c) && ((c) <= ' ' || '~' < (c)))
141
142 /* general substring compare of *[s1..e1) and *[s2..e2). sx is start of
143 * a substring. ex if !NULL points to the first char after a substring,
144 * otherwise the string is assumed to sized by a terminating nul.
145 * Return lexical ordering of *s1:*s2.
146 */
147 static int sstrcmp(const char *s1, const char *e1, const char *s2,
148 const char *e2)
149 {
150 for (;;) {
151 if (!*s1 || !*s2 || *s1 != *s2)
152 return (*s1 - *s2);
153 ++s1, ++s2;
154 if (s1 == e1 && s2 == e2)
155 return (0);
156 else if (s1 == e1)
157 return (*s2);
158 else if (s2 == e2)
159 return (*s1);
160 }
161 }
162
163 /* compare *[s..e) to *altstr. *altstr may be a simple string or multiple
164 * '|' delimited (possibly empty) strings in which case search for a match
165 * within the alternatives proceeds left to right. Return 0 for success,
166 * non-zero otherwise.
167 */
168 static int altcmp(const char *s, const char *e, const char *altstr)
169 {
170 const char *p, *q;
171
172 for (q = p = altstr; ; ) {
173 while (*p && *p != '|')
174 ++p;
175 if ((q == p && !*s) || (q != p && !sstrcmp(s, e, q, p)))
176 return (0);
177 if (!*p)
178 return (1);
179 else
180 q = ++p;
181 }
182 }
183
184 /* search featureset for flag *[s..e), if found set corresponding bit in
185 * *pval and return true, otherwise return false
186 */
187 static bool lookup_feature(uint32_t *pval, const char *s, const char *e,
188 const char **featureset)
189 {
190 uint32_t mask;
191 const char **ppc;
192 bool found = false;
193
194 for (mask = 1, ppc = featureset; mask; mask <<= 1, ++ppc) {
195 if (*ppc && !altcmp(s, e, *ppc)) {
196 *pval |= mask;
197 found = true;
198 }
199 }
200 return found;
201 }
202
203 static void add_flagname_to_bitmaps(const char *flagname, uint32_t *features,
204 uint32_t *ext_features,
205 uint32_t *ext2_features,
206 uint32_t *ext3_features,
207 uint32_t *kvm_features,
208 uint32_t *svm_features)
209 {
210 if (!lookup_feature(features, flagname, NULL, feature_name) &&
211 !lookup_feature(ext_features, flagname, NULL, ext_feature_name) &&
212 !lookup_feature(ext2_features, flagname, NULL, ext2_feature_name) &&
213 !lookup_feature(ext3_features, flagname, NULL, ext3_feature_name) &&
214 !lookup_feature(kvm_features, flagname, NULL, kvm_feature_name) &&
215 !lookup_feature(svm_features, flagname, NULL, svm_feature_name))
216 fprintf(stderr, "CPU feature %s not found\n", flagname);
217 }
218
219 typedef struct x86_def_t {
220 struct x86_def_t *next;
221 const char *name;
222 uint32_t level;
223 uint32_t vendor1, vendor2, vendor3;
224 int family;
225 int model;
226 int stepping;
227 int tsc_khz;
228 uint32_t features, ext_features, ext2_features, ext3_features;
229 uint32_t kvm_features, svm_features;
230 uint32_t xlevel;
231 char model_id[48];
232 int vendor_override;
233 uint32_t flags;
234 /* Store the results of Centaur's CPUID instructions */
235 uint32_t ext4_features;
236 uint32_t xlevel2;
237 } x86_def_t;
238
239 #define I486_FEATURES (CPUID_FP87 | CPUID_VME | CPUID_PSE)
240 #define PENTIUM_FEATURES (I486_FEATURES | CPUID_DE | CPUID_TSC | \
241 CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_MMX | CPUID_APIC)
242 #define PENTIUM2_FEATURES (PENTIUM_FEATURES | CPUID_PAE | CPUID_SEP | \
243 CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | CPUID_PAT | \
244 CPUID_PSE36 | CPUID_FXSR)
245 #define PENTIUM3_FEATURES (PENTIUM2_FEATURES | CPUID_SSE)
246 #define PPRO_FEATURES (CPUID_FP87 | CPUID_DE | CPUID_PSE | CPUID_TSC | \
247 CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_PGE | CPUID_CMOV | \
248 CPUID_PAT | CPUID_FXSR | CPUID_MMX | CPUID_SSE | CPUID_SSE2 | \
249 CPUID_PAE | CPUID_SEP | CPUID_APIC)
250 #define EXT2_FEATURE_MASK 0x0183F3FF
251
252 #define TCG_FEATURES (CPUID_FP87 | CPUID_PSE | CPUID_TSC | CPUID_MSR | \
253 CPUID_PAE | CPUID_MCE | CPUID_CX8 | CPUID_APIC | CPUID_SEP | \
254 CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | CPUID_PAT | \
255 CPUID_PSE36 | CPUID_CLFLUSH | CPUID_ACPI | CPUID_MMX | \
256 CPUID_FXSR | CPUID_SSE | CPUID_SSE2 | CPUID_SS)
257 /* partly implemented:
258 CPUID_MTRR, CPUID_MCA, CPUID_CLFLUSH (needed for Win64)
259 CPUID_PSE36 (needed for Solaris) */
260 /* missing:
261 CPUID_VME, CPUID_DTS, CPUID_SS, CPUID_HT, CPUID_TM, CPUID_PBE */
262 #define TCG_EXT_FEATURES (CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | \
263 CPUID_EXT_CX16 | CPUID_EXT_POPCNT | \
264 CPUID_EXT_HYPERVISOR)
265 /* missing:
266 CPUID_EXT_DTES64, CPUID_EXT_DSCPL, CPUID_EXT_VMX, CPUID_EXT_EST,
267 CPUID_EXT_TM2, CPUID_EXT_XTPR, CPUID_EXT_PDCM, CPUID_EXT_XSAVE */
268 #define TCG_EXT2_FEATURES ((TCG_FEATURES & EXT2_FEATURE_MASK) | \
269 CPUID_EXT2_NX | CPUID_EXT2_MMXEXT | CPUID_EXT2_RDTSCP | \
270 CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT)
271 /* missing:
272 CPUID_EXT2_PDPE1GB */
273 #define TCG_EXT3_FEATURES (CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM | \
274 CPUID_EXT3_CR8LEG | CPUID_EXT3_ABM | CPUID_EXT3_SSE4A)
275 #define TCG_SVM_FEATURES 0
276
277 /* maintains list of cpu model definitions
278 */
279 static x86_def_t *x86_defs = {NULL};
280
281 /* built-in cpu model definitions (deprecated)
282 */
283 static x86_def_t builtin_x86_defs[] = {
284 {
285 .name = "qemu64",
286 .level = 4,
287 .vendor1 = CPUID_VENDOR_AMD_1,
288 .vendor2 = CPUID_VENDOR_AMD_2,
289 .vendor3 = CPUID_VENDOR_AMD_3,
290 .family = 6,
291 .model = 2,
292 .stepping = 3,
293 .features = PPRO_FEATURES |
294 CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
295 CPUID_PSE36,
296 .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16 | CPUID_EXT_POPCNT,
297 .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
298 CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
299 .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
300 CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
301 .xlevel = 0x8000000A,
302 .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
303 },
304 {
305 .name = "phenom",
306 .level = 5,
307 .vendor1 = CPUID_VENDOR_AMD_1,
308 .vendor2 = CPUID_VENDOR_AMD_2,
309 .vendor3 = CPUID_VENDOR_AMD_3,
310 .family = 16,
311 .model = 2,
312 .stepping = 3,
313 .features = PPRO_FEATURES |
314 CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
315 CPUID_PSE36 | CPUID_VME | CPUID_HT,
316 .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_CX16 |
317 CPUID_EXT_POPCNT,
318 .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
319 CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX |
320 CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT | CPUID_EXT2_MMXEXT |
321 CPUID_EXT2_FFXSR | CPUID_EXT2_PDPE1GB | CPUID_EXT2_RDTSCP,
322 /* Missing: CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
323 CPUID_EXT3_CR8LEG,
324 CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
325 CPUID_EXT3_OSVW, CPUID_EXT3_IBS */
326 .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
327 CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
328 .svm_features = CPUID_SVM_NPT | CPUID_SVM_LBRV,
329 .xlevel = 0x8000001A,
330 .model_id = "AMD Phenom(tm) 9550 Quad-Core Processor"
331 },
332 {
333 .name = "core2duo",
334 .level = 10,
335 .family = 6,
336 .model = 15,
337 .stepping = 11,
338 .features = PPRO_FEATURES |
339 CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
340 CPUID_PSE36 | CPUID_VME | CPUID_DTS | CPUID_ACPI | CPUID_SS |
341 CPUID_HT | CPUID_TM | CPUID_PBE,
342 .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
343 CPUID_EXT_DTES64 | CPUID_EXT_DSCPL | CPUID_EXT_VMX | CPUID_EXT_EST |
344 CPUID_EXT_TM2 | CPUID_EXT_CX16 | CPUID_EXT_XTPR | CPUID_EXT_PDCM,
345 .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
346 .ext3_features = CPUID_EXT3_LAHF_LM,
347 .xlevel = 0x80000008,
348 .model_id = "Intel(R) Core(TM)2 Duo CPU T7700 @ 2.40GHz",
349 },
350 {
351 .name = "kvm64",
352 .level = 5,
353 .vendor1 = CPUID_VENDOR_INTEL_1,
354 .vendor2 = CPUID_VENDOR_INTEL_2,
355 .vendor3 = CPUID_VENDOR_INTEL_3,
356 .family = 15,
357 .model = 6,
358 .stepping = 1,
359 /* Missing: CPUID_VME, CPUID_HT */
360 .features = PPRO_FEATURES |
361 CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
362 CPUID_PSE36,
363 /* Missing: CPUID_EXT_POPCNT, CPUID_EXT_MONITOR */
364 .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16,
365 /* Missing: CPUID_EXT2_PDPE1GB, CPUID_EXT2_RDTSCP */
366 .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
367 CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
368 /* Missing: CPUID_EXT3_LAHF_LM, CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
369 CPUID_EXT3_CR8LEG, CPUID_EXT3_ABM, CPUID_EXT3_SSE4A,
370 CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
371 CPUID_EXT3_OSVW, CPUID_EXT3_IBS, CPUID_EXT3_SVM */
372 .ext3_features = 0,
373 .xlevel = 0x80000008,
374 .model_id = "Common KVM processor"
375 },
376 {
377 .name = "qemu32",
378 .level = 4,
379 .family = 6,
380 .model = 3,
381 .stepping = 3,
382 .features = PPRO_FEATURES,
383 .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_POPCNT,
384 .xlevel = 0x80000004,
385 .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
386 },
387 {
388 .name = "kvm32",
389 .level = 5,
390 .family = 15,
391 .model = 6,
392 .stepping = 1,
393 .features = PPRO_FEATURES |
394 CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_PSE36,
395 .ext_features = CPUID_EXT_SSE3,
396 .ext2_features = PPRO_FEATURES & EXT2_FEATURE_MASK,
397 .ext3_features = 0,
398 .xlevel = 0x80000008,
399 .model_id = "Common 32-bit KVM processor"
400 },
401 {
402 .name = "coreduo",
403 .level = 10,
404 .family = 6,
405 .model = 14,
406 .stepping = 8,
407 .features = PPRO_FEATURES | CPUID_VME |
408 CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_DTS | CPUID_ACPI |
409 CPUID_SS | CPUID_HT | CPUID_TM | CPUID_PBE,
410 .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_VMX |
411 CPUID_EXT_EST | CPUID_EXT_TM2 | CPUID_EXT_XTPR | CPUID_EXT_PDCM,
412 .ext2_features = CPUID_EXT2_NX,
413 .xlevel = 0x80000008,
414 .model_id = "Genuine Intel(R) CPU T2600 @ 2.16GHz",
415 },
416 {
417 .name = "486",
418 .level = 1,
419 .family = 4,
420 .model = 0,
421 .stepping = 0,
422 .features = I486_FEATURES,
423 .xlevel = 0,
424 },
425 {
426 .name = "pentium",
427 .level = 1,
428 .family = 5,
429 .model = 4,
430 .stepping = 3,
431 .features = PENTIUM_FEATURES,
432 .xlevel = 0,
433 },
434 {
435 .name = "pentium2",
436 .level = 2,
437 .family = 6,
438 .model = 5,
439 .stepping = 2,
440 .features = PENTIUM2_FEATURES,
441 .xlevel = 0,
442 },
443 {
444 .name = "pentium3",
445 .level = 2,
446 .family = 6,
447 .model = 7,
448 .stepping = 3,
449 .features = PENTIUM3_FEATURES,
450 .xlevel = 0,
451 },
452 {
453 .name = "athlon",
454 .level = 2,
455 .vendor1 = CPUID_VENDOR_AMD_1,
456 .vendor2 = CPUID_VENDOR_AMD_2,
457 .vendor3 = CPUID_VENDOR_AMD_3,
458 .family = 6,
459 .model = 2,
460 .stepping = 3,
461 .features = PPRO_FEATURES | CPUID_PSE36 | CPUID_VME | CPUID_MTRR | CPUID_MCA,
462 .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) | CPUID_EXT2_MMXEXT | CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT,
463 .xlevel = 0x80000008,
464 /* XXX: put another string ? */
465 .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
466 },
467 {
468 .name = "n270",
469 /* original is on level 10 */
470 .level = 5,
471 .family = 6,
472 .model = 28,
473 .stepping = 2,
474 .features = PPRO_FEATURES |
475 CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_VME | CPUID_DTS |
476 CPUID_ACPI | CPUID_SS | CPUID_HT | CPUID_TM | CPUID_PBE,
477 /* Some CPUs got no CPUID_SEP */
478 .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
479 CPUID_EXT_DSCPL | CPUID_EXT_EST | CPUID_EXT_TM2 | CPUID_EXT_XTPR,
480 .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) | CPUID_EXT2_NX,
481 .ext3_features = CPUID_EXT3_LAHF_LM,
482 .xlevel = 0x8000000A,
483 .model_id = "Intel(R) Atom(TM) CPU N270 @ 1.60GHz",
484 },
485 };
486
487 static int cpu_x86_fill_model_id(char *str)
488 {
489 uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
490 int i;
491
492 for (i = 0; i < 3; i++) {
493 host_cpuid(0x80000002 + i, 0, &eax, &ebx, &ecx, &edx);
494 memcpy(str + i * 16 + 0, &eax, 4);
495 memcpy(str + i * 16 + 4, &ebx, 4);
496 memcpy(str + i * 16 + 8, &ecx, 4);
497 memcpy(str + i * 16 + 12, &edx, 4);
498 }
499 return 0;
500 }
501
502 static int cpu_x86_fill_host(x86_def_t *x86_cpu_def)
503 {
504 uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
505
506 x86_cpu_def->name = "host";
507 host_cpuid(0x0, 0, &eax, &ebx, &ecx, &edx);
508 x86_cpu_def->level = eax;
509 x86_cpu_def->vendor1 = ebx;
510 x86_cpu_def->vendor2 = edx;
511 x86_cpu_def->vendor3 = ecx;
512
513 host_cpuid(0x1, 0, &eax, &ebx, &ecx, &edx);
514 x86_cpu_def->family = ((eax >> 8) & 0x0F) + ((eax >> 20) & 0xFF);
515 x86_cpu_def->model = ((eax >> 4) & 0x0F) | ((eax & 0xF0000) >> 12);
516 x86_cpu_def->stepping = eax & 0x0F;
517 x86_cpu_def->ext_features = ecx;
518 x86_cpu_def->features = edx;
519
520 host_cpuid(0x80000000, 0, &eax, &ebx, &ecx, &edx);
521 x86_cpu_def->xlevel = eax;
522
523 host_cpuid(0x80000001, 0, &eax, &ebx, &ecx, &edx);
524 x86_cpu_def->ext2_features = edx;
525 x86_cpu_def->ext3_features = ecx;
526 cpu_x86_fill_model_id(x86_cpu_def->model_id);
527 x86_cpu_def->vendor_override = 0;
528
529 /* Call Centaur's CPUID instruction. */
530 if (x86_cpu_def->vendor1 == CPUID_VENDOR_VIA_1 &&
531 x86_cpu_def->vendor2 == CPUID_VENDOR_VIA_2 &&
532 x86_cpu_def->vendor3 == CPUID_VENDOR_VIA_3) {
533 host_cpuid(0xC0000000, 0, &eax, &ebx, &ecx, &edx);
534 if (eax >= 0xC0000001) {
535 /* Support VIA max extended level */
536 x86_cpu_def->xlevel2 = eax;
537 host_cpuid(0xC0000001, 0, &eax, &ebx, &ecx, &edx);
538 x86_cpu_def->ext4_features = edx;
539 }
540 }
541
542 /*
543 * Every SVM feature requires emulation support in KVM - so we can't just
544 * read the host features here. KVM might even support SVM features not
545 * available on the host hardware. Just set all bits and mask out the
546 * unsupported ones later.
547 */
548 x86_cpu_def->svm_features = -1;
549
550 return 0;
551 }
552
553 static int unavailable_host_feature(struct model_features_t *f, uint32_t mask)
554 {
555 int i;
556
557 for (i = 0; i < 32; ++i)
558 if (1 << i & mask) {
559 fprintf(stderr, "warning: host cpuid %04x_%04x lacks requested"
560 " flag '%s' [0x%08x]\n",
561 f->cpuid >> 16, f->cpuid & 0xffff,
562 f->flag_names[i] ? f->flag_names[i] : "[reserved]", mask);
563 break;
564 }
565 return 0;
566 }
567
568 /* best effort attempt to inform user requested cpu flags aren't making
569 * their way to the guest. Note: ft[].check_feat ideally should be
570 * specified via a guest_def field to suppress report of extraneous flags.
571 */
572 static int check_features_against_host(x86_def_t *guest_def)
573 {
574 x86_def_t host_def;
575 uint32_t mask;
576 int rv, i;
577 struct model_features_t ft[] = {
578 {&guest_def->features, &host_def.features,
579 ~0, feature_name, 0x00000000},
580 {&guest_def->ext_features, &host_def.ext_features,
581 ~CPUID_EXT_HYPERVISOR, ext_feature_name, 0x00000001},
582 {&guest_def->ext2_features, &host_def.ext2_features,
583 ~PPRO_FEATURES, ext2_feature_name, 0x80000000},
584 {&guest_def->ext3_features, &host_def.ext3_features,
585 ~CPUID_EXT3_SVM, ext3_feature_name, 0x80000001}};
586
587 cpu_x86_fill_host(&host_def);
588 for (rv = 0, i = 0; i < ARRAY_SIZE(ft); ++i)
589 for (mask = 1; mask; mask <<= 1)
590 if (ft[i].check_feat & mask && *ft[i].guest_feat & mask &&
591 !(*ft[i].host_feat & mask)) {
592 unavailable_host_feature(&ft[i], mask);
593 rv = 1;
594 }
595 return rv;
596 }
597
598 static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model)
599 {
600 unsigned int i;
601 x86_def_t *def;
602
603 char *s = strdup(cpu_model);
604 char *featurestr, *name = strtok(s, ",");
605 /* Features to be added*/
606 uint32_t plus_features = 0, plus_ext_features = 0;
607 uint32_t plus_ext2_features = 0, plus_ext3_features = 0;
608 uint32_t plus_kvm_features = 0, plus_svm_features = 0;
609 /* Features to be removed */
610 uint32_t minus_features = 0, minus_ext_features = 0;
611 uint32_t minus_ext2_features = 0, minus_ext3_features = 0;
612 uint32_t minus_kvm_features = 0, minus_svm_features = 0;
613 uint32_t numvalue;
614
615 for (def = x86_defs; def; def = def->next)
616 if (!strcmp(name, def->name))
617 break;
618 if (kvm_enabled() && strcmp(name, "host") == 0) {
619 cpu_x86_fill_host(x86_cpu_def);
620 } else if (!def) {
621 goto error;
622 } else {
623 memcpy(x86_cpu_def, def, sizeof(*def));
624 }
625
626 plus_kvm_features = ~0; /* not supported bits will be filtered out later */
627
628 add_flagname_to_bitmaps("hypervisor", &plus_features,
629 &plus_ext_features, &plus_ext2_features, &plus_ext3_features,
630 &plus_kvm_features, &plus_svm_features);
631
632 featurestr = strtok(NULL, ",");
633
634 while (featurestr) {
635 char *val;
636 if (featurestr[0] == '+') {
637 add_flagname_to_bitmaps(featurestr + 1, &plus_features,
638 &plus_ext_features, &plus_ext2_features,
639 &plus_ext3_features, &plus_kvm_features,
640 &plus_svm_features);
641 } else if (featurestr[0] == '-') {
642 add_flagname_to_bitmaps(featurestr + 1, &minus_features,
643 &minus_ext_features, &minus_ext2_features,
644 &minus_ext3_features, &minus_kvm_features,
645 &minus_svm_features);
646 } else if ((val = strchr(featurestr, '='))) {
647 *val = 0; val++;
648 if (!strcmp(featurestr, "family")) {
649 char *err;
650 numvalue = strtoul(val, &err, 0);
651 if (!*val || *err) {
652 fprintf(stderr, "bad numerical value %s\n", val);
653 goto error;
654 }
655 x86_cpu_def->family = numvalue;
656 } else if (!strcmp(featurestr, "model")) {
657 char *err;
658 numvalue = strtoul(val, &err, 0);
659 if (!*val || *err || numvalue > 0xff) {
660 fprintf(stderr, "bad numerical value %s\n", val);
661 goto error;
662 }
663 x86_cpu_def->model = numvalue;
664 } else if (!strcmp(featurestr, "stepping")) {
665 char *err;
666 numvalue = strtoul(val, &err, 0);
667 if (!*val || *err || numvalue > 0xf) {
668 fprintf(stderr, "bad numerical value %s\n", val);
669 goto error;
670 }
671 x86_cpu_def->stepping = numvalue ;
672 } else if (!strcmp(featurestr, "level")) {
673 char *err;
674 numvalue = strtoul(val, &err, 0);
675 if (!*val || *err) {
676 fprintf(stderr, "bad numerical value %s\n", val);
677 goto error;
678 }
679 x86_cpu_def->level = numvalue;
680 } else if (!strcmp(featurestr, "xlevel")) {
681 char *err;
682 numvalue = strtoul(val, &err, 0);
683 if (!*val || *err) {
684 fprintf(stderr, "bad numerical value %s\n", val);
685 goto error;
686 }
687 if (numvalue < 0x80000000) {
688 numvalue += 0x80000000;
689 }
690 x86_cpu_def->xlevel = numvalue;
691 } else if (!strcmp(featurestr, "vendor")) {
692 if (strlen(val) != 12) {
693 fprintf(stderr, "vendor string must be 12 chars long\n");
694 goto error;
695 }
696 x86_cpu_def->vendor1 = 0;
697 x86_cpu_def->vendor2 = 0;
698 x86_cpu_def->vendor3 = 0;
699 for(i = 0; i < 4; i++) {
700 x86_cpu_def->vendor1 |= ((uint8_t)val[i ]) << (8 * i);
701 x86_cpu_def->vendor2 |= ((uint8_t)val[i + 4]) << (8 * i);
702 x86_cpu_def->vendor3 |= ((uint8_t)val[i + 8]) << (8 * i);
703 }
704 x86_cpu_def->vendor_override = 1;
705 } else if (!strcmp(featurestr, "model_id")) {
706 pstrcpy(x86_cpu_def->model_id, sizeof(x86_cpu_def->model_id),
707 val);
708 } else if (!strcmp(featurestr, "tsc_freq")) {
709 int64_t tsc_freq;
710 char *err;
711
712 tsc_freq = strtosz_suffix_unit(val, &err,
713 STRTOSZ_DEFSUFFIX_B, 1000);
714 if (!*val || *err) {
715 fprintf(stderr, "bad numerical value %s\n", val);
716 goto error;
717 }
718 x86_cpu_def->tsc_khz = tsc_freq / 1000;
719 } else {
720 fprintf(stderr, "unrecognized feature %s\n", featurestr);
721 goto error;
722 }
723 } else if (!strcmp(featurestr, "check")) {
724 check_cpuid = 1;
725 } else if (!strcmp(featurestr, "enforce")) {
726 check_cpuid = enforce_cpuid = 1;
727 } else {
728 fprintf(stderr, "feature string `%s' not in format (+feature|-feature|feature=xyz)\n", featurestr);
729 goto error;
730 }
731 featurestr = strtok(NULL, ",");
732 }
733 x86_cpu_def->features |= plus_features;
734 x86_cpu_def->ext_features |= plus_ext_features;
735 x86_cpu_def->ext2_features |= plus_ext2_features;
736 x86_cpu_def->ext3_features |= plus_ext3_features;
737 x86_cpu_def->kvm_features |= plus_kvm_features;
738 x86_cpu_def->svm_features |= plus_svm_features;
739 x86_cpu_def->features &= ~minus_features;
740 x86_cpu_def->ext_features &= ~minus_ext_features;
741 x86_cpu_def->ext2_features &= ~minus_ext2_features;
742 x86_cpu_def->ext3_features &= ~minus_ext3_features;
743 x86_cpu_def->kvm_features &= ~minus_kvm_features;
744 x86_cpu_def->svm_features &= ~minus_svm_features;
745 if (check_cpuid) {
746 if (check_features_against_host(x86_cpu_def) && enforce_cpuid)
747 goto error;
748 }
749 free(s);
750 return 0;
751
752 error:
753 free(s);
754 return -1;
755 }
756
757 /* generate a composite string into buf of all cpuid names in featureset
758 * selected by fbits. indicate truncation at bufsize in the event of overflow.
759 * if flags, suppress names undefined in featureset.
760 */
761 static void listflags(char *buf, int bufsize, uint32_t fbits,
762 const char **featureset, uint32_t flags)
763 {
764 const char **p = &featureset[31];
765 char *q, *b, bit;
766 int nc;
767
768 b = 4 <= bufsize ? buf + (bufsize -= 3) - 1 : NULL;
769 *buf = '\0';
770 for (q = buf, bit = 31; fbits && bufsize; --p, fbits &= ~(1 << bit), --bit)
771 if (fbits & 1 << bit && (*p || !flags)) {
772 if (*p)
773 nc = snprintf(q, bufsize, "%s%s", q == buf ? "" : " ", *p);
774 else
775 nc = snprintf(q, bufsize, "%s[%d]", q == buf ? "" : " ", bit);
776 if (bufsize <= nc) {
777 if (b) {
778 memcpy(b, "...", sizeof("..."));
779 }
780 return;
781 }
782 q += nc;
783 bufsize -= nc;
784 }
785 }
786
787 /* generate CPU information:
788 * -? list model names
789 * -?model list model names/IDs
790 * -?dump output all model (x86_def_t) data
791 * -?cpuid list all recognized cpuid flag names
792 */
793 void x86_cpu_list(FILE *f, fprintf_function cpu_fprintf, const char *optarg)
794 {
795 unsigned char model = !strcmp("?model", optarg);
796 unsigned char dump = !strcmp("?dump", optarg);
797 unsigned char cpuid = !strcmp("?cpuid", optarg);
798 x86_def_t *def;
799 char buf[256];
800
801 if (cpuid) {
802 (*cpu_fprintf)(f, "Recognized CPUID flags:\n");
803 listflags(buf, sizeof (buf), (uint32_t)~0, feature_name, 1);
804 (*cpu_fprintf)(f, " f_edx: %s\n", buf);
805 listflags(buf, sizeof (buf), (uint32_t)~0, ext_feature_name, 1);
806 (*cpu_fprintf)(f, " f_ecx: %s\n", buf);
807 listflags(buf, sizeof (buf), (uint32_t)~0, ext2_feature_name, 1);
808 (*cpu_fprintf)(f, " extf_edx: %s\n", buf);
809 listflags(buf, sizeof (buf), (uint32_t)~0, ext3_feature_name, 1);
810 (*cpu_fprintf)(f, " extf_ecx: %s\n", buf);
811 return;
812 }
813 for (def = x86_defs; def; def = def->next) {
814 snprintf(buf, sizeof (buf), def->flags ? "[%s]": "%s", def->name);
815 if (model || dump) {
816 (*cpu_fprintf)(f, "x86 %16s %-48s\n", buf, def->model_id);
817 } else {
818 (*cpu_fprintf)(f, "x86 %16s\n", buf);
819 }
820 if (dump) {
821 memcpy(buf, &def->vendor1, sizeof (def->vendor1));
822 memcpy(buf + 4, &def->vendor2, sizeof (def->vendor2));
823 memcpy(buf + 8, &def->vendor3, sizeof (def->vendor3));
824 buf[12] = '\0';
825 (*cpu_fprintf)(f,
826 " family %d model %d stepping %d level %d xlevel 0x%x"
827 " vendor \"%s\"\n",
828 def->family, def->model, def->stepping, def->level,
829 def->xlevel, buf);
830 listflags(buf, sizeof (buf), def->features, feature_name, 0);
831 (*cpu_fprintf)(f, " feature_edx %08x (%s)\n", def->features,
832 buf);
833 listflags(buf, sizeof (buf), def->ext_features, ext_feature_name,
834 0);
835 (*cpu_fprintf)(f, " feature_ecx %08x (%s)\n", def->ext_features,
836 buf);
837 listflags(buf, sizeof (buf), def->ext2_features, ext2_feature_name,
838 0);
839 (*cpu_fprintf)(f, " extfeature_edx %08x (%s)\n",
840 def->ext2_features, buf);
841 listflags(buf, sizeof (buf), def->ext3_features, ext3_feature_name,
842 0);
843 (*cpu_fprintf)(f, " extfeature_ecx %08x (%s)\n",
844 def->ext3_features, buf);
845 (*cpu_fprintf)(f, "\n");
846 }
847 }
848 if (kvm_enabled()) {
849 (*cpu_fprintf)(f, "x86 %16s\n", "[host]");
850 }
851 }
852
853 int cpu_x86_register (CPUX86State *env, const char *cpu_model)
854 {
855 x86_def_t def1, *def = &def1;
856
857 memset(def, 0, sizeof(*def));
858
859 if (cpu_x86_find_by_name(def, cpu_model) < 0)
860 return -1;
861 if (def->vendor1) {
862 env->cpuid_vendor1 = def->vendor1;
863 env->cpuid_vendor2 = def->vendor2;
864 env->cpuid_vendor3 = def->vendor3;
865 } else {
866 env->cpuid_vendor1 = CPUID_VENDOR_INTEL_1;
867 env->cpuid_vendor2 = CPUID_VENDOR_INTEL_2;
868 env->cpuid_vendor3 = CPUID_VENDOR_INTEL_3;
869 }
870 env->cpuid_vendor_override = def->vendor_override;
871 env->cpuid_level = def->level;
872 if (def->family > 0x0f)
873 env->cpuid_version = 0xf00 | ((def->family - 0x0f) << 20);
874 else
875 env->cpuid_version = def->family << 8;
876 env->cpuid_version |= ((def->model & 0xf) << 4) | ((def->model >> 4) << 16);
877 env->cpuid_version |= def->stepping;
878 env->cpuid_features = def->features;
879 env->cpuid_ext_features = def->ext_features;
880 env->cpuid_ext2_features = def->ext2_features;
881 env->cpuid_ext3_features = def->ext3_features;
882 env->cpuid_xlevel = def->xlevel;
883 env->cpuid_kvm_features = def->kvm_features;
884 env->cpuid_svm_features = def->svm_features;
885 env->cpuid_ext4_features = def->ext4_features;
886 env->cpuid_xlevel2 = def->xlevel2;
887 env->tsc_khz = def->tsc_khz;
888 if (!kvm_enabled()) {
889 env->cpuid_features &= TCG_FEATURES;
890 env->cpuid_ext_features &= TCG_EXT_FEATURES;
891 env->cpuid_ext2_features &= (TCG_EXT2_FEATURES
892 #ifdef TARGET_X86_64
893 | CPUID_EXT2_SYSCALL | CPUID_EXT2_LM
894 #endif
895 );
896 env->cpuid_ext3_features &= TCG_EXT3_FEATURES;
897 env->cpuid_svm_features &= TCG_SVM_FEATURES;
898 }
899 {
900 const char *model_id = def->model_id;
901 int c, len, i;
902 if (!model_id)
903 model_id = "";
904 len = strlen(model_id);
905 for(i = 0; i < 48; i++) {
906 if (i >= len)
907 c = '\0';
908 else
909 c = (uint8_t)model_id[i];
910 env->cpuid_model[i >> 2] |= c << (8 * (i & 3));
911 }
912 }
913 return 0;
914 }
915
916 #if !defined(CONFIG_USER_ONLY)
917 /* copy vendor id string to 32 bit register, nul pad as needed
918 */
919 static void cpyid(const char *s, uint32_t *id)
920 {
921 char *d = (char *)id;
922 char i;
923
924 for (i = sizeof (*id); i--; )
925 *d++ = *s ? *s++ : '\0';
926 }
927
928 /* interpret radix and convert from string to arbitrary scalar,
929 * otherwise flag failure
930 */
931 #define setscalar(pval, str, perr) \
932 { \
933 char *pend; \
934 unsigned long ul; \
935 \
936 ul = strtoul(str, &pend, 0); \
937 *str && !*pend ? (*pval = ul) : (*perr = 1); \
938 }
939
940 /* map cpuid options to feature bits, otherwise return failure
941 * (option tags in *str are delimited by whitespace)
942 */
943 static void setfeatures(uint32_t *pval, const char *str,
944 const char **featureset, int *perr)
945 {
946 const char *p, *q;
947
948 for (q = p = str; *p || *q; q = p) {
949 while (iswhite(*p))
950 q = ++p;
951 while (*p && !iswhite(*p))
952 ++p;
953 if (!*q && !*p)
954 return;
955 if (!lookup_feature(pval, q, p, featureset)) {
956 fprintf(stderr, "error: feature \"%.*s\" not available in set\n",
957 (int)(p - q), q);
958 *perr = 1;
959 return;
960 }
961 }
962 }
963
964 /* map config file options to x86_def_t form
965 */
966 static int cpudef_setfield(const char *name, const char *str, void *opaque)
967 {
968 x86_def_t *def = opaque;
969 int err = 0;
970
971 if (!strcmp(name, "name")) {
972 def->name = strdup(str);
973 } else if (!strcmp(name, "model_id")) {
974 strncpy(def->model_id, str, sizeof (def->model_id));
975 } else if (!strcmp(name, "level")) {
976 setscalar(&def->level, str, &err)
977 } else if (!strcmp(name, "vendor")) {
978 cpyid(&str[0], &def->vendor1);
979 cpyid(&str[4], &def->vendor2);
980 cpyid(&str[8], &def->vendor3);
981 } else if (!strcmp(name, "family")) {
982 setscalar(&def->family, str, &err)
983 } else if (!strcmp(name, "model")) {
984 setscalar(&def->model, str, &err)
985 } else if (!strcmp(name, "stepping")) {
986 setscalar(&def->stepping, str, &err)
987 } else if (!strcmp(name, "feature_edx")) {
988 setfeatures(&def->features, str, feature_name, &err);
989 } else if (!strcmp(name, "feature_ecx")) {
990 setfeatures(&def->ext_features, str, ext_feature_name, &err);
991 } else if (!strcmp(name, "extfeature_edx")) {
992 setfeatures(&def->ext2_features, str, ext2_feature_name, &err);
993 } else if (!strcmp(name, "extfeature_ecx")) {
994 setfeatures(&def->ext3_features, str, ext3_feature_name, &err);
995 } else if (!strcmp(name, "xlevel")) {
996 setscalar(&def->xlevel, str, &err)
997 } else {
998 fprintf(stderr, "error: unknown option [%s = %s]\n", name, str);
999 return (1);
1000 }
1001 if (err) {
1002 fprintf(stderr, "error: bad option value [%s = %s]\n", name, str);
1003 return (1);
1004 }
1005 return (0);
1006 }
1007
1008 /* register config file entry as x86_def_t
1009 */
1010 static int cpudef_register(QemuOpts *opts, void *opaque)
1011 {
1012 x86_def_t *def = g_malloc0(sizeof (x86_def_t));
1013
1014 qemu_opt_foreach(opts, cpudef_setfield, def, 1);
1015 def->next = x86_defs;
1016 x86_defs = def;
1017 return (0);
1018 }
1019
1020 void cpu_clear_apic_feature(CPUX86State *env)
1021 {
1022 env->cpuid_features &= ~CPUID_APIC;
1023 }
1024
1025 #endif /* !CONFIG_USER_ONLY */
1026
1027 /* register "cpudef" models defined in configuration file. Here we first
1028 * preload any built-in definitions
1029 */
1030 void x86_cpudef_setup(void)
1031 {
1032 int i;
1033
1034 for (i = 0; i < ARRAY_SIZE(builtin_x86_defs); ++i) {
1035 builtin_x86_defs[i].next = x86_defs;
1036 builtin_x86_defs[i].flags = 1;
1037 x86_defs = &builtin_x86_defs[i];
1038 }
1039 #if !defined(CONFIG_USER_ONLY)
1040 qemu_opts_foreach(qemu_find_opts("cpudef"), cpudef_register, NULL, 0);
1041 #endif
1042 }
1043
1044 static void get_cpuid_vendor(CPUX86State *env, uint32_t *ebx,
1045 uint32_t *ecx, uint32_t *edx)
1046 {
1047 *ebx = env->cpuid_vendor1;
1048 *edx = env->cpuid_vendor2;
1049 *ecx = env->cpuid_vendor3;
1050
1051 /* sysenter isn't supported on compatibility mode on AMD, syscall
1052 * isn't supported in compatibility mode on Intel.
1053 * Normally we advertise the actual cpu vendor, but you can override
1054 * this if you want to use KVM's sysenter/syscall emulation
1055 * in compatibility mode and when doing cross vendor migration
1056 */
1057 if (kvm_enabled() && ! env->cpuid_vendor_override) {
1058 host_cpuid(0, 0, NULL, ebx, ecx, edx);
1059 }
1060 }
1061
1062 void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
1063 uint32_t *eax, uint32_t *ebx,
1064 uint32_t *ecx, uint32_t *edx)
1065 {
1066 /* test if maximum index reached */
1067 if (index & 0x80000000) {
1068 if (index > env->cpuid_xlevel) {
1069 if (env->cpuid_xlevel2 > 0) {
1070 /* Handle the Centaur's CPUID instruction. */
1071 if (index > env->cpuid_xlevel2) {
1072 index = env->cpuid_xlevel2;
1073 } else if (index < 0xC0000000) {
1074 index = env->cpuid_xlevel;
1075 }
1076 } else {
1077 index = env->cpuid_xlevel;
1078 }
1079 }
1080 } else {
1081 if (index > env->cpuid_level)
1082 index = env->cpuid_level;
1083 }
1084
1085 switch(index) {
1086 case 0:
1087 *eax = env->cpuid_level;
1088 get_cpuid_vendor(env, ebx, ecx, edx);
1089 break;
1090 case 1:
1091 *eax = env->cpuid_version;
1092 *ebx = (env->cpuid_apic_id << 24) | 8 << 8; /* CLFLUSH size in quad words, Linux wants it. */
1093 *ecx = env->cpuid_ext_features;
1094 *edx = env->cpuid_features;
1095 if (env->nr_cores * env->nr_threads > 1) {
1096 *ebx |= (env->nr_cores * env->nr_threads) << 16;
1097 *edx |= 1 << 28; /* HTT bit */
1098 }
1099 break;
1100 case 2:
1101 /* cache info: needed for Pentium Pro compatibility */
1102 *eax = 1;
1103 *ebx = 0;
1104 *ecx = 0;
1105 *edx = 0x2c307d;
1106 break;
1107 case 4:
1108 /* cache info: needed for Core compatibility */
1109 if (env->nr_cores > 1) {
1110 *eax = (env->nr_cores - 1) << 26;
1111 } else {
1112 *eax = 0;
1113 }
1114 switch (count) {
1115 case 0: /* L1 dcache info */
1116 *eax |= 0x0000121;
1117 *ebx = 0x1c0003f;
1118 *ecx = 0x000003f;
1119 *edx = 0x0000001;
1120 break;
1121 case 1: /* L1 icache info */
1122 *eax |= 0x0000122;
1123 *ebx = 0x1c0003f;
1124 *ecx = 0x000003f;
1125 *edx = 0x0000001;
1126 break;
1127 case 2: /* L2 cache info */
1128 *eax |= 0x0000143;
1129 if (env->nr_threads > 1) {
1130 *eax |= (env->nr_threads - 1) << 14;
1131 }
1132 *ebx = 0x3c0003f;
1133 *ecx = 0x0000fff;
1134 *edx = 0x0000001;
1135 break;
1136 default: /* end of info */
1137 *eax = 0;
1138 *ebx = 0;
1139 *ecx = 0;
1140 *edx = 0;
1141 break;
1142 }
1143 break;
1144 case 5:
1145 /* mwait info: needed for Core compatibility */
1146 *eax = 0; /* Smallest monitor-line size in bytes */
1147 *ebx = 0; /* Largest monitor-line size in bytes */
1148 *ecx = CPUID_MWAIT_EMX | CPUID_MWAIT_IBE;
1149 *edx = 0;
1150 break;
1151 case 6:
1152 /* Thermal and Power Leaf */
1153 *eax = 0;
1154 *ebx = 0;
1155 *ecx = 0;
1156 *edx = 0;
1157 break;
1158 case 7:
1159 if (kvm_enabled()) {
1160 KVMState *s = env->kvm_state;
1161
1162 *eax = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EAX);
1163 *ebx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EBX);
1164 *ecx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_ECX);
1165 *edx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EDX);
1166 } else {
1167 *eax = 0;
1168 *ebx = 0;
1169 *ecx = 0;
1170 *edx = 0;
1171 }
1172 break;
1173 case 9:
1174 /* Direct Cache Access Information Leaf */
1175 *eax = 0; /* Bits 0-31 in DCA_CAP MSR */
1176 *ebx = 0;
1177 *ecx = 0;
1178 *edx = 0;
1179 break;
1180 case 0xA:
1181 /* Architectural Performance Monitoring Leaf */
1182 *eax = 0;
1183 *ebx = 0;
1184 *ecx = 0;
1185 *edx = 0;
1186 break;
1187 case 0xD:
1188 /* Processor Extended State */
1189 if (!(env->cpuid_ext_features & CPUID_EXT_XSAVE)) {
1190 *eax = 0;
1191 *ebx = 0;
1192 *ecx = 0;
1193 *edx = 0;
1194 break;
1195 }
1196 if (kvm_enabled()) {
1197 KVMState *s = env->kvm_state;
1198
1199 *eax = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EAX);
1200 *ebx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EBX);
1201 *ecx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_ECX);
1202 *edx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EDX);
1203 } else {
1204 *eax = 0;
1205 *ebx = 0;
1206 *ecx = 0;
1207 *edx = 0;
1208 }
1209 break;
1210 case 0x80000000:
1211 *eax = env->cpuid_xlevel;
1212 *ebx = env->cpuid_vendor1;
1213 *edx = env->cpuid_vendor2;
1214 *ecx = env->cpuid_vendor3;
1215 break;
1216 case 0x80000001:
1217 *eax = env->cpuid_version;
1218 *ebx = 0;
1219 *ecx = env->cpuid_ext3_features;
1220 *edx = env->cpuid_ext2_features;
1221
1222 /* The Linux kernel checks for the CMPLegacy bit and
1223 * discards multiple thread information if it is set.
1224 * So dont set it here for Intel to make Linux guests happy.
1225 */
1226 if (env->nr_cores * env->nr_threads > 1) {
1227 uint32_t tebx, tecx, tedx;
1228 get_cpuid_vendor(env, &tebx, &tecx, &tedx);
1229 if (tebx != CPUID_VENDOR_INTEL_1 ||
1230 tedx != CPUID_VENDOR_INTEL_2 ||
1231 tecx != CPUID_VENDOR_INTEL_3) {
1232 *ecx |= 1 << 1; /* CmpLegacy bit */
1233 }
1234 }
1235 break;
1236 case 0x80000002:
1237 case 0x80000003:
1238 case 0x80000004:
1239 *eax = env->cpuid_model[(index - 0x80000002) * 4 + 0];
1240 *ebx = env->cpuid_model[(index - 0x80000002) * 4 + 1];
1241 *ecx = env->cpuid_model[(index - 0x80000002) * 4 + 2];
1242 *edx = env->cpuid_model[(index - 0x80000002) * 4 + 3];
1243 break;
1244 case 0x80000005:
1245 /* cache info (L1 cache) */
1246 *eax = 0x01ff01ff;
1247 *ebx = 0x01ff01ff;
1248 *ecx = 0x40020140;
1249 *edx = 0x40020140;
1250 break;
1251 case 0x80000006:
1252 /* cache info (L2 cache) */
1253 *eax = 0;
1254 *ebx = 0x42004200;
1255 *ecx = 0x02008140;
1256 *edx = 0;
1257 break;
1258 case 0x80000008:
1259 /* virtual & phys address size in low 2 bytes. */
1260 /* XXX: This value must match the one used in the MMU code. */
1261 if (env->cpuid_ext2_features & CPUID_EXT2_LM) {
1262 /* 64 bit processor */
1263 /* XXX: The physical address space is limited to 42 bits in exec.c. */
1264 *eax = 0x00003028; /* 48 bits virtual, 40 bits physical */
1265 } else {
1266 if (env->cpuid_features & CPUID_PSE36)
1267 *eax = 0x00000024; /* 36 bits physical */
1268 else
1269 *eax = 0x00000020; /* 32 bits physical */
1270 }
1271 *ebx = 0;
1272 *ecx = 0;
1273 *edx = 0;
1274 if (env->nr_cores * env->nr_threads > 1) {
1275 *ecx |= (env->nr_cores * env->nr_threads) - 1;
1276 }
1277 break;
1278 case 0x8000000A:
1279 if (env->cpuid_ext3_features & CPUID_EXT3_SVM) {
1280 *eax = 0x00000001; /* SVM Revision */
1281 *ebx = 0x00000010; /* nr of ASIDs */
1282 *ecx = 0;
1283 *edx = env->cpuid_svm_features; /* optional features */
1284 } else {
1285 *eax = 0;
1286 *ebx = 0;
1287 *ecx = 0;
1288 *edx = 0;
1289 }
1290 break;
1291 case 0xC0000000:
1292 *eax = env->cpuid_xlevel2;
1293 *ebx = 0;
1294 *ecx = 0;
1295 *edx = 0;
1296 break;
1297 case 0xC0000001:
1298 /* Support for VIA CPU's CPUID instruction */
1299 *eax = env->cpuid_version;
1300 *ebx = 0;
1301 *ecx = 0;
1302 *edx = env->cpuid_ext4_features;
1303 break;
1304 case 0xC0000002:
1305 case 0xC0000003:
1306 case 0xC0000004:
1307 /* Reserved for the future, and now filled with zero */
1308 *eax = 0;
1309 *ebx = 0;
1310 *ecx = 0;
1311 *edx = 0;
1312 break;
1313 default:
1314 /* reserved values: zero */
1315 *eax = 0;
1316 *ebx = 0;
1317 *ecx = 0;
1318 *edx = 0;
1319 break;
1320 }
1321 }
various patches