target-i386/cpuid.c

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