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, 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 /* maintains list of cpu model definitions
 234  */
 235 static x86_def_t *x86_defs = {NULL};
 236
 237 /* built-in cpu model definitions (deprecated)
 238  */
 239 static x86_def_t builtin_x86_defs[] = {
 240 #ifdef TARGET_X86_64
 241     {
 242         .name = "qemu64",
 243         .level = 4,
 244         .vendor1 = CPUID_VENDOR_AMD_1,
 245         .vendor2 = CPUID_VENDOR_AMD_2,
 246         .vendor3 = CPUID_VENDOR_AMD_3,
 247         .family = 6,
 248         .model = 2,
 249         .stepping = 3,
 250         .features = PPRO_FEATURES |
 251         /* these features are needed for Win64 and aren't fully implemented */
 252             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
 253         /* this feature is needed for Solaris and isn't fully implemented */
 254             CPUID_PSE36,
 255         .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16 | CPUID_EXT_POPCNT,
 256         .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
 257             CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
 258         .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
 259             CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
 260         .xlevel = 0x8000000A,
 261         .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
 262     },
 263     {
 264         .name = "phenom",
 265         .level = 5,
 266         .vendor1 = CPUID_VENDOR_AMD_1,
 267         .vendor2 = CPUID_VENDOR_AMD_2,
 268         .vendor3 = CPUID_VENDOR_AMD_3,
 269         .family = 16,
 270         .model = 2,
 271         .stepping = 3,
 272         /* Missing: CPUID_VME, CPUID_HT */
 273         .features = PPRO_FEATURES |
 274             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
 275             CPUID_PSE36,
 276         .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_CX16 |
 277             CPUID_EXT_POPCNT,
 278         /* Missing: CPUID_EXT2_PDPE1GB, CPUID_EXT2_RDTSCP */
 279         .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
 280             CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX |
 281             CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT | CPUID_EXT2_MMXEXT |
 282             CPUID_EXT2_FFXSR,
 283         /* Missing: CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
 284                     CPUID_EXT3_CR8LEG,
 285                     CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
 286                     CPUID_EXT3_OSVW, CPUID_EXT3_IBS */
 287         .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
 288             CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
 289         .xlevel = 0x8000001A,
 290         .model_id = "AMD Phenom(tm) 9550 Quad-Core Processor"
 291     },
 292     {
 293         .name = "core2duo",
 294         .level = 10,
 295         .family = 6,
 296         .model = 15,
 297         .stepping = 11,
 298         /* The original CPU also implements these features:
 299                CPUID_VME, CPUID_DTS, CPUID_ACPI, CPUID_SS, CPUID_HT,
 300                CPUID_TM, CPUID_PBE */
 301         .features = PPRO_FEATURES |
 302             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
 303             CPUID_PSE36,
 304         /* The original CPU also implements these ext features:
 305                CPUID_EXT_DTES64, CPUID_EXT_DSCPL, CPUID_EXT_VMX, CPUID_EXT_EST,
 306                CPUID_EXT_TM2, CPUID_EXT_CX16, CPUID_EXT_XTPR, CPUID_EXT_PDCM */
 307         .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3,
 308         .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
 309         .ext3_features = CPUID_EXT3_LAHF_LM,
 310         .xlevel = 0x80000008,
 311         .model_id = "Intel(R) Core(TM)2 Duo CPU     T7700  @ 2.40GHz",
 312     },
 313     {
 314         .name = "kvm64",
 315         .level = 5,
 316         .vendor1 = CPUID_VENDOR_INTEL_1,
 317         .vendor2 = CPUID_VENDOR_INTEL_2,
 318         .vendor3 = CPUID_VENDOR_INTEL_3,
 319         .family = 15,
 320         .model = 6,
 321         .stepping = 1,
 322         /* Missing: CPUID_VME, CPUID_HT */
 323         .features = PPRO_FEATURES |
 324             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
 325             CPUID_PSE36,
 326         /* Missing: CPUID_EXT_POPCNT, CPUID_EXT_MONITOR */
 327         .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16,
 328         /* Missing: CPUID_EXT2_PDPE1GB, CPUID_EXT2_RDTSCP */
 329         .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
 330             CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
 331         /* Missing: CPUID_EXT3_LAHF_LM, CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
 332                     CPUID_EXT3_CR8LEG, CPUID_EXT3_ABM, CPUID_EXT3_SSE4A,
 333                     CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
 334                     CPUID_EXT3_OSVW, CPUID_EXT3_IBS, CPUID_EXT3_SVM */
 335         .ext3_features = 0,
 336         .xlevel = 0x80000008,
 337         .model_id = "Common KVM processor"
 338     },
 339 #endif
 340     {
 341         .name = "qemu32",
 342         .level = 4,
 343         .family = 6,
 344         .model = 3,
 345         .stepping = 3,
 346         .features = PPRO_FEATURES,
 347         .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_POPCNT,
 348         .xlevel = 0,
 349         .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
 350     },
 351     {
 352         .name = "coreduo",
 353         .level = 10,
 354         .family = 6,
 355         .model = 14,
 356         .stepping = 8,
 357         /* The original CPU also implements these features:
 358                CPUID_DTS, CPUID_ACPI, CPUID_SS, CPUID_HT,
 359                CPUID_TM, CPUID_PBE */
 360         .features = PPRO_FEATURES | CPUID_VME |
 361             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA,
 362         /* The original CPU also implements these ext features:
 363                CPUID_EXT_VMX, CPUID_EXT_EST, CPUID_EXT_TM2, CPUID_EXT_XTPR,
 364                CPUID_EXT_PDCM */
 365         .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR,
 366         .ext2_features = CPUID_EXT2_NX,
 367         .xlevel = 0x80000008,
 368         .model_id = "Genuine Intel(R) CPU           T2600  @ 2.16GHz",
 369     },
 370     {
 371         .name = "486",
 372         .level = 0,
 373         .family = 4,
 374         .model = 0,
 375         .stepping = 0,
 376         .features = I486_FEATURES,
 377         .xlevel = 0,
 378     },
 379     {
 380         .name = "pentium",
 381         .level = 1,
 382         .family = 5,
 383         .model = 4,
 384         .stepping = 3,
 385         .features = PENTIUM_FEATURES,
 386         .xlevel = 0,
 387     },
 388     {
 389         .name = "pentium2",
 390         .level = 2,
 391         .family = 6,
 392         .model = 5,
 393         .stepping = 2,
 394         .features = PENTIUM2_FEATURES,
 395         .xlevel = 0,
 396     },
 397     {
 398         .name = "pentium3",
 399         .level = 2,
 400         .family = 6,
 401         .model = 7,
 402         .stepping = 3,
 403         .features = PENTIUM3_FEATURES,
 404         .xlevel = 0,
 405     },
 406     {
 407         .name = "athlon",
 408         .level = 2,
 409         .vendor1 = CPUID_VENDOR_AMD_1,
 410         .vendor2 = CPUID_VENDOR_AMD_2,
 411         .vendor3 = CPUID_VENDOR_AMD_3,
 412         .family = 6,
 413         .model = 2,
 414         .stepping = 3,
 415         .features = PPRO_FEATURES | CPUID_PSE36 | CPUID_VME | CPUID_MTRR | CPUID_MCA,
 416         .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) | CPUID_EXT2_MMXEXT | CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT,
 417         .xlevel = 0x80000008,
 418         /* XXX: put another string ? */
 419         .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
 420     },
 421     {
 422         .name = "n270",
 423         /* original is on level 10 */
 424         .level = 5,
 425         .family = 6,
 426         .model = 28,
 427         .stepping = 2,
 428         .features = PPRO_FEATURES |
 429             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_VME,
 430             /* Missing: CPUID_DTS | CPUID_ACPI | CPUID_SS |
 431              * CPUID_HT | CPUID_TM | CPUID_PBE */
 432             /* Some CPUs got no CPUID_SEP */
 433         .ext_features = CPUID_EXT_MONITOR |
 434             CPUID_EXT_SSE3 /* PNI */ | CPUID_EXT_SSSE3,
 435             /* Missing: CPUID_EXT_DSCPL | CPUID_EXT_EST |
 436              * CPUID_EXT_TM2 | CPUID_EXT_XTPR */
 437         .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) | CPUID_EXT2_NX,
 438         /* Missing: .ext3_features = CPUID_EXT3_LAHF_LM */
 439         .xlevel = 0x8000000A,
 440         .model_id = "Intel(R) Atom(TM) CPU N270   @ 1.60GHz",
 441     },
 442 };
 443
 444 static int cpu_x86_fill_model_id(char *str)
 445 {
 446     uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
 447     int i;
 448
 449     for (i = 0; i < 3; i++) {
 450         host_cpuid(0x80000002 + i, 0, &eax, &ebx, &ecx, &edx);
 451         memcpy(str + i * 16 +  0, &eax, 4);
 452         memcpy(str + i * 16 +  4, &ebx, 4);
 453         memcpy(str + i * 16 +  8, &ecx, 4);
 454         memcpy(str + i * 16 + 12, &edx, 4);
 455     }
 456     return 0;
 457 }
 458
 459 static int cpu_x86_fill_host(x86_def_t *x86_cpu_def)
 460 {
 461     uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
 462
 463     x86_cpu_def->name = "host";
 464     host_cpuid(0x0, 0, &eax, &ebx, &ecx, &edx);
 465     x86_cpu_def->level = eax;
 466     x86_cpu_def->vendor1 = ebx;
 467     x86_cpu_def->vendor2 = edx;
 468     x86_cpu_def->vendor3 = ecx;
 469
 470     host_cpuid(0x1, 0, &eax, &ebx, &ecx, &edx);
 471     x86_cpu_def->family = ((eax >> 8) & 0x0F) + ((eax >> 20) & 0xFF);
 472     x86_cpu_def->model = ((eax >> 4) & 0x0F) | ((eax & 0xF0000) >> 12);
 473     x86_cpu_def->stepping = eax & 0x0F;
 474     x86_cpu_def->ext_features = ecx;
 475     x86_cpu_def->features = edx;
 476
 477     host_cpuid(0x80000000, 0, &eax, &ebx, &ecx, &edx);
 478     x86_cpu_def->xlevel = eax;
 479
 480     host_cpuid(0x80000001, 0, &eax, &ebx, &ecx, &edx);
 481     x86_cpu_def->ext2_features = edx;
 482     x86_cpu_def->ext3_features = ecx;
 483     cpu_x86_fill_model_id(x86_cpu_def->model_id);
 484     x86_cpu_def->vendor_override = 0;
 485
 486     return 0;
 487 }
 488
 489 static int unavailable_host_feature(struct model_features_t *f, uint32_t mask)
 490 {
 491     int i;
 492
 493     for (i = 0; i < 32; ++i)
 494         if (1 << i & mask) {
 495             fprintf(stderr, "warning: host cpuid %04x_%04x lacks requested"
 496                 " flag '%s' [0x%08x]\n",
 497                 f->cpuid >> 16, f->cpuid & 0xffff,
 498                 f->flag_names[i] ? f->flag_names[i] : "[reserved]", mask);
 499             break;
 500         }
 501     return 0;
 502 }
 503
 504 /* best effort attempt to inform user requested cpu flags aren't making
 505  * their way to the guest.  Note: ft[].check_feat ideally should be
 506  * specified via a guest_def field to suppress report of extraneous flags.
 507  */
 508 static int check_features_against_host(x86_def_t *guest_def)
 509 {
 510     x86_def_t host_def;
 511     uint32_t mask;
 512     int rv, i;
 513     struct model_features_t ft[] = {
 514         {&guest_def->features, &host_def.features,
 515             ~0, feature_name, 0x00000000},
 516         {&guest_def->ext_features, &host_def.ext_features,
 517             ~CPUID_EXT_HYPERVISOR, ext_feature_name, 0x00000001},
 518         {&guest_def->ext2_features, &host_def.ext2_features,
 519             ~PPRO_FEATURES, ext2_feature_name, 0x80000000},
 520         {&guest_def->ext3_features, &host_def.ext3_features,
 521             ~CPUID_EXT3_SVM, ext3_feature_name, 0x80000001}};
 522
 523     cpu_x86_fill_host(&host_def);
 524     for (rv = 0, i = 0; i < sizeof (ft) / sizeof (ft[0]); ++i)
 525         for (mask = 1; mask; mask <<= 1)
 526             if (ft[i].check_feat & mask && *ft[i].guest_feat & mask &&
 527                 !(*ft[i].host_feat & mask)) {
 528                     unavailable_host_feature(&ft[i], mask);
 529                     rv = 1;
 530                 }
 531     return rv;
 532 }
 533
 534 static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model)
 535 {
 536     unsigned int i;
 537     x86_def_t *def;
 538
 539     char *s = strdup(cpu_model);
 540     char *featurestr, *name = strtok(s, ",");
 541     uint32_t plus_features = 0, plus_ext_features = 0, plus_ext2_features = 0, plus_ext3_features = 0, plus_kvm_features = 0;
 542     uint32_t minus_features = 0, minus_ext_features = 0, minus_ext2_features = 0, minus_ext3_features = 0, minus_kvm_features = 0;
 543     uint32_t numvalue;
 544
 545     for (def = x86_defs; def; def = def->next)
 546         if (!strcmp(name, def->name))
 547             break;
 548     if (kvm_enabled() && strcmp(name, "host") == 0) {
 549         cpu_x86_fill_host(x86_cpu_def);
 550     } else if (!def) {
 551         goto error;
 552     } else {
 553         memcpy(x86_cpu_def, def, sizeof(*def));
 554     }
 555
 556     plus_kvm_features = ~0; /* not supported bits will be filtered out later */
 557
 558     add_flagname_to_bitmaps("hypervisor", &plus_features,
 559         &plus_ext_features, &plus_ext2_features, &plus_ext3_features,
 560         &plus_kvm_features);
 561
 562     featurestr = strtok(NULL, ",");
 563
 564     while (featurestr) {
 565         char *val;
 566         if (featurestr[0] == '+') {
 567             add_flagname_to_bitmaps(featurestr + 1, &plus_features, &plus_ext_features, &plus_ext2_features, &plus_ext3_features, &plus_kvm_features);
 568         } else if (featurestr[0] == '-') {
 569             add_flagname_to_bitmaps(featurestr + 1, &minus_features, &minus_ext_features, &minus_ext2_features, &minus_ext3_features, &minus_kvm_features);
 570         } else if ((val = strchr(featurestr, '='))) {
 571             *val = 0; val++;
 572             if (!strcmp(featurestr, "family")) {
 573                 char *err;
 574                 numvalue = strtoul(val, &err, 0);
 575                 if (!*val || *err) {
 576                     fprintf(stderr, "bad numerical value %s\n", val);
 577                     goto error;
 578                 }
 579                 x86_cpu_def->family = numvalue;
 580             } else if (!strcmp(featurestr, "model")) {
 581                 char *err;
 582                 numvalue = strtoul(val, &err, 0);
 583                 if (!*val || *err || numvalue > 0xff) {
 584                     fprintf(stderr, "bad numerical value %s\n", val);
 585                     goto error;
 586                 }
 587                 x86_cpu_def->model = numvalue;
 588             } else if (!strcmp(featurestr, "stepping")) {
 589                 char *err;
 590                 numvalue = strtoul(val, &err, 0);
 591                 if (!*val || *err || numvalue > 0xf) {
 592                     fprintf(stderr, "bad numerical value %s\n", val);
 593                     goto error;
 594                 }
 595                 x86_cpu_def->stepping = numvalue ;
 596             } else if (!strcmp(featurestr, "level")) {
 597                 char *err;
 598                 numvalue = strtoul(val, &err, 0);
 599                 if (!*val || *err) {
 600                     fprintf(stderr, "bad numerical value %s\n", val);
 601                     goto error;
 602                 }
 603                 x86_cpu_def->level = numvalue;
 604             } else if (!strcmp(featurestr, "xlevel")) {
 605                 char *err;
 606                 numvalue = strtoul(val, &err, 0);
 607                 if (!*val || *err) {
 608                     fprintf(stderr, "bad numerical value %s\n", val);
 609                     goto error;
 610                 }
 611                 if (numvalue < 0x80000000) {
 612                         numvalue += 0x80000000;
 613                 }
 614                 x86_cpu_def->xlevel = numvalue;
 615             } else if (!strcmp(featurestr, "vendor")) {
 616                 if (strlen(val) != 12) {
 617                     fprintf(stderr, "vendor string must be 12 chars long\n");
 618                     goto error;
 619                 }
 620                 x86_cpu_def->vendor1 = 0;
 621                 x86_cpu_def->vendor2 = 0;
 622                 x86_cpu_def->vendor3 = 0;
 623                 for(i = 0; i < 4; i++) {
 624                     x86_cpu_def->vendor1 |= ((uint8_t)val[i    ]) << (8 * i);
 625                     x86_cpu_def->vendor2 |= ((uint8_t)val[i + 4]) << (8 * i);
 626                     x86_cpu_def->vendor3 |= ((uint8_t)val[i + 8]) << (8 * i);
 627                 }
 628                 x86_cpu_def->vendor_override = 1;
 629             } else if (!strcmp(featurestr, "model_id")) {
 630                 pstrcpy(x86_cpu_def->model_id, sizeof(x86_cpu_def->model_id),
 631                         val);
 632             } else {
 633                 fprintf(stderr, "unrecognized feature %s\n", featurestr);
 634                 goto error;
 635             }
 636         } else if (!strcmp(featurestr, "check")) {
 637             check_cpuid = 1;
 638         } else if (!strcmp(featurestr, "enforce")) {
 639             check_cpuid = enforce_cpuid = 1;
 640         } else {
 641             fprintf(stderr, "feature string `%s' not in format (+feature|-feature|feature=xyz)\n", featurestr);
 642             goto error;
 643         }
 644         featurestr = strtok(NULL, ",");
 645     }
 646     x86_cpu_def->features |= plus_features;
 647     x86_cpu_def->ext_features |= plus_ext_features;
 648     x86_cpu_def->ext2_features |= plus_ext2_features;
 649     x86_cpu_def->ext3_features |= plus_ext3_features;
 650     x86_cpu_def->kvm_features |= plus_kvm_features;
 651     x86_cpu_def->features &= ~minus_features;
 652     x86_cpu_def->ext_features &= ~minus_ext_features;
 653     x86_cpu_def->ext2_features &= ~minus_ext2_features;
 654     x86_cpu_def->ext3_features &= ~minus_ext3_features;
 655     x86_cpu_def->kvm_features &= ~minus_kvm_features;
 656     if (check_cpuid) {
 657         if (check_features_against_host(x86_cpu_def) && enforce_cpuid)
 658             goto error;
 659     }
 660     free(s);
 661     return 0;
 662
 663 error:
 664     free(s);
 665     return -1;
 666 }
 667
 668 /* generate a composite string into buf of all cpuid names in featureset
 669  * selected by fbits.  indicate truncation at bufsize in the event of overflow.
 670  * if flags, suppress names undefined in featureset.
 671  */
 672 static void listflags(char *buf, int bufsize, uint32_t fbits,
 673     const char **featureset, uint32_t flags)
 674 {
 675     const char **p = &featureset[31];
 676     char *q, *b, bit;
 677     int nc;
 678
 679     b = 4 <= bufsize ? buf + (bufsize -= 3) - 1 : NULL;
 680     *buf = '\0';
 681     for (q = buf, bit = 31; fbits && bufsize; --p, fbits &= ~(1 << bit), --bit)
 682         if (fbits & 1 << bit && (*p || !flags)) {
 683             if (*p)
 684                 nc = snprintf(q, bufsize, "%s%s", q == buf ? "" : " ", *p);
 685             else
 686                 nc = snprintf(q, bufsize, "%s[%d]", q == buf ? "" : " ", bit);
 687             if (bufsize <= nc) {
 688                 if (b) {
 689                     memcpy(b, "...", sizeof("..."));
 690                 }
 691                 return;
 692             }
 693             q += nc;
 694             bufsize -= nc;
 695         }
 696 }
 697
 698 /* generate CPU information:
 699  * -?        list model names
 700  * -?model   list model names/IDs
 701  * -?dump    output all model (x86_def_t) data
 702  * -?cpuid   list all recognized cpuid flag names
 703  */
 704 void x86_cpu_list (FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
 705                   const char *optarg)
 706 {
 707     unsigned char model = !strcmp("?model", optarg);
 708     unsigned char dump = !strcmp("?dump", optarg);
 709     unsigned char cpuid = !strcmp("?cpuid", optarg);
 710     x86_def_t *def;
 711     char buf[256];
 712
 713     if (cpuid) {
 714         (*cpu_fprintf)(f, "Recognized CPUID flags:\n");
 715         listflags(buf, sizeof (buf), (uint32_t)~0, feature_name, 1);
 716         (*cpu_fprintf)(f, "  f_edx: %s\n", buf);
 717         listflags(buf, sizeof (buf), (uint32_t)~0, ext_feature_name, 1);
 718         (*cpu_fprintf)(f, "  f_ecx: %s\n", buf);
 719         listflags(buf, sizeof (buf), (uint32_t)~0, ext2_feature_name, 1);
 720         (*cpu_fprintf)(f, "  extf_edx: %s\n", buf);
 721         listflags(buf, sizeof (buf), (uint32_t)~0, ext3_feature_name, 1);
 722         (*cpu_fprintf)(f, "  extf_ecx: %s\n", buf);
 723         return;
 724     }
 725     for (def = x86_defs; def; def = def->next) {
 726         snprintf(buf, sizeof (buf), def->flags ? "[%s]": "%s", def->name);
 727         if (model || dump) {
 728             (*cpu_fprintf)(f, "x86 %16s  %-48s\n", buf, def->model_id);
 729         } else {
 730             (*cpu_fprintf)(f, "x86 %16s\n", buf);
 731         }
 732         if (dump) {
 733             memcpy(buf, &def->vendor1, sizeof (def->vendor1));
 734             memcpy(buf + 4, &def->vendor2, sizeof (def->vendor2));
 735             memcpy(buf + 8, &def->vendor3, sizeof (def->vendor3));
 736             buf[12] = '\0';
 737             (*cpu_fprintf)(f,
 738                 "  family %d model %d stepping %d level %d xlevel 0x%x"
 739                 " vendor \"%s\"\n",
 740                 def->family, def->model, def->stepping, def->level,
 741                 def->xlevel, buf);
 742             listflags(buf, sizeof (buf), def->features, feature_name, 0);
 743             (*cpu_fprintf)(f, "  feature_edx %08x (%s)\n", def->features,
 744                 buf);
 745             listflags(buf, sizeof (buf), def->ext_features, ext_feature_name,
 746                 0);
 747             (*cpu_fprintf)(f, "  feature_ecx %08x (%s)\n", def->ext_features,
 748                 buf);
 749             listflags(buf, sizeof (buf), def->ext2_features, ext2_feature_name,
 750                 0);
 751             (*cpu_fprintf)(f, "  extfeature_edx %08x (%s)\n",
 752                 def->ext2_features, buf);
 753             listflags(buf, sizeof (buf), def->ext3_features, ext3_feature_name,
 754                 0);
 755             (*cpu_fprintf)(f, "  extfeature_ecx %08x (%s)\n",
 756                 def->ext3_features, buf);
 757             (*cpu_fprintf)(f, "\n");
 758         }
 759     }
 760 }
 761
 762 int cpu_x86_register (CPUX86State *env, const char *cpu_model)
 763 {
 764     x86_def_t def1, *def = &def1;
 765
 766     if (cpu_x86_find_by_name(def, cpu_model) < 0)
 767         return -1;
 768     if (def->vendor1) {
 769         env->cpuid_vendor1 = def->vendor1;
 770         env->cpuid_vendor2 = def->vendor2;
 771         env->cpuid_vendor3 = def->vendor3;
 772     } else {
 773         env->cpuid_vendor1 = CPUID_VENDOR_INTEL_1;
 774         env->cpuid_vendor2 = CPUID_VENDOR_INTEL_2;
 775         env->cpuid_vendor3 = CPUID_VENDOR_INTEL_3;
 776     }
 777     env->cpuid_vendor_override = def->vendor_override;
 778     env->cpuid_level = def->level;
 779     if (def->family > 0x0f)
 780         env->cpuid_version = 0xf00 | ((def->family - 0x0f) << 20);
 781     else
 782         env->cpuid_version = def->family << 8;
 783     env->cpuid_version |= ((def->model & 0xf) << 4) | ((def->model >> 4) << 16);
 784     env->cpuid_version |= def->stepping;
 785     env->cpuid_features = def->features;
 786     env->pat = 0x0007040600070406ULL;
 787     env->cpuid_ext_features = def->ext_features;
 788     env->cpuid_ext2_features = def->ext2_features;
 789     env->cpuid_ext3_features = def->ext3_features;
 790     env->cpuid_xlevel = def->xlevel;
 791     env->cpuid_kvm_features = def->kvm_features;
 792     {
 793         const char *model_id = def->model_id;
 794         int c, len, i;
 795         if (!model_id)
 796             model_id = "";
 797         len = strlen(model_id);
 798         for(i = 0; i < 48; i++) {
 799             if (i >= len)
 800                 c = '\0';
 801             else
 802                 c = (uint8_t)model_id[i];
 803             env->cpuid_model[i >> 2] |= c << (8 * (i & 3));
 804         }
 805     }
 806     return 0;
 807 }
 808
 809 #if !defined(CONFIG_USER_ONLY)
 810 /* copy vendor id string to 32 bit register, nul pad as needed
 811  */
 812 static void cpyid(const char *s, uint32_t *id)
 813 {
 814     char *d = (char *)id;
 815     char i;
 816
 817     for (i = sizeof (*id); i--; )
 818         *d++ = *s ? *s++ : '\0';
 819 }
 820
 821 /* interpret radix and convert from string to arbitrary scalar,
 822  * otherwise flag failure
 823  */
 824 #define setscalar(pval, str, perr)                      \
 825 {                                                       \
 826     char *pend;                                         \
 827     unsigned long ul;                                   \
 828                                                         \
 829     ul = strtoul(str, &pend, 0);                        \
 830     *str && !*pend ? (*pval = ul) : (*perr = 1);        \
 831 }
 832
 833 /* map cpuid options to feature bits, otherwise return failure
 834  * (option tags in *str are delimited by whitespace)
 835  */
 836 static void setfeatures(uint32_t *pval, const char *str,
 837     const char **featureset, int *perr)
 838 {
 839     const char *p, *q;
 840
 841     for (q = p = str; *p || *q; q = p) {
 842         while (iswhite(*p))
 843             q = ++p;
 844         while (*p && !iswhite(*p))
 845             ++p;
 846         if (!*q && !*p)
 847             return;
 848         if (!lookup_feature(pval, q, p, featureset)) {
 849             fprintf(stderr, "error: feature \"%.*s\" not available in set\n",
 850                 (int)(p - q), q);
 851             *perr = 1;
 852             return;
 853         }
 854     }
 855 }
 856
 857 /* map config file options to x86_def_t form
 858  */
 859 static int cpudef_setfield(const char *name, const char *str, void *opaque)
 860 {
 861     x86_def_t *def = opaque;
 862     int err = 0;
 863
 864     if (!strcmp(name, "name")) {
 865         def->name = strdup(str);
 866     } else if (!strcmp(name, "model_id")) {
 867         strncpy(def->model_id, str, sizeof (def->model_id));
 868     } else if (!strcmp(name, "level")) {
 869         setscalar(&def->level, str, &err)
 870     } else if (!strcmp(name, "vendor")) {
 871         cpyid(&str[0], &def->vendor1);
 872         cpyid(&str[4], &def->vendor2);
 873         cpyid(&str[8], &def->vendor3);
 874     } else if (!strcmp(name, "family")) {
 875         setscalar(&def->family, str, &err)
 876     } else if (!strcmp(name, "model")) {
 877         setscalar(&def->model, str, &err)
 878     } else if (!strcmp(name, "stepping")) {
 879         setscalar(&def->stepping, str, &err)
 880     } else if (!strcmp(name, "feature_edx")) {
 881         setfeatures(&def->features, str, feature_name, &err);
 882     } else if (!strcmp(name, "feature_ecx")) {
 883         setfeatures(&def->ext_features, str, ext_feature_name, &err);
 884     } else if (!strcmp(name, "extfeature_edx")) {
 885         setfeatures(&def->ext2_features, str, ext2_feature_name, &err);
 886     } else if (!strcmp(name, "extfeature_ecx")) {
 887         setfeatures(&def->ext3_features, str, ext3_feature_name, &err);
 888     } else if (!strcmp(name, "xlevel")) {
 889         setscalar(&def->xlevel, str, &err)
 890     } else {
 891         fprintf(stderr, "error: unknown option [%s = %s]\n", name, str);
 892         return (1);
 893     }
 894     if (err) {
 895         fprintf(stderr, "error: bad option value [%s = %s]\n", name, str);
 896         return (1);
 897     }
 898     return (0);
 899 }
 900
 901 /* register config file entry as x86_def_t
 902  */
 903 static int cpudef_register(QemuOpts *opts, void *opaque)
 904 {
 905     x86_def_t *def = qemu_mallocz(sizeof (x86_def_t));
 906
 907     qemu_opt_foreach(opts, cpudef_setfield, def, 1);
 908     def->next = x86_defs;
 909     x86_defs = def;
 910     return (0);
 911 }
 912 #endif /* !CONFIG_USER_ONLY */
 913
 914 /* register "cpudef" models defined in configuration file.  Here we first
 915  * preload any built-in definitions
 916  */
 917 void x86_cpudef_setup(void)
 918 {
 919     int i;
 920
 921     for (i = 0; i < ARRAY_SIZE(builtin_x86_defs); ++i) {
 922         builtin_x86_defs[i].next = x86_defs;
 923         builtin_x86_defs[i].flags = 1;
 924         x86_defs = &builtin_x86_defs[i];
 925     }
 926 #if !defined(CONFIG_USER_ONLY)
 927     qemu_opts_foreach(&qemu_cpudef_opts, cpudef_register, NULL, 0);
 928 #endif
 929 }
 930
 931 static void get_cpuid_vendor(CPUX86State *env, uint32_t *ebx,
 932                              uint32_t *ecx, uint32_t *edx)
 933 {
 934     *ebx = env->cpuid_vendor1;
 935     *edx = env->cpuid_vendor2;
 936     *ecx = env->cpuid_vendor3;
 937
 938     /* sysenter isn't supported on compatibility mode on AMD, syscall
 939      * isn't supported in compatibility mode on Intel.
 940      * Normally we advertise the actual cpu vendor, but you can override
 941      * this if you want to use KVM's sysenter/syscall emulation
 942      * in compatibility mode and when doing cross vendor migration
 943      */
 944     if (kvm_enabled() && env->cpuid_vendor_override) {
 945         host_cpuid(0, 0, NULL, ebx, ecx, edx);
 946     }
 947 }
 948
 949 void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
 950                    uint32_t *eax, uint32_t *ebx,
 951                    uint32_t *ecx, uint32_t *edx)
 952 {
 953     /* test if maximum index reached */
 954     if (index & 0x80000000) {
 955         if (index > env->cpuid_xlevel)
 956             index = env->cpuid_level;
 957     } else {
 958         if (index > env->cpuid_level)
 959             index = env->cpuid_level;
 960     }
 961
 962     switch(index) {
 963     case 0:
 964         *eax = env->cpuid_level;
 965         get_cpuid_vendor(env, ebx, ecx, edx);
 966         break;
 967     case 1:
 968         *eax = env->cpuid_version;
 969         *ebx = (env->cpuid_apic_id << 24) | 8 << 8; /* CLFLUSH size in quad words, Linux wants it. */
 970         *ecx = env->cpuid_ext_features;
 971         *edx = env->cpuid_features;
 972         if (env->nr_cores * env->nr_threads > 1) {
 973             *ebx |= (env->nr_cores * env->nr_threads) << 16;
 974             *edx |= 1 << 28;    /* HTT bit */
 975         }
 976         break;
 977     case 2:
 978         /* cache info: needed for Pentium Pro compatibility */
 979         *eax = 1;
 980         *ebx = 0;
 981         *ecx = 0;
 982         *edx = 0x2c307d;
 983         break;
 984     case 4:
 985         /* cache info: needed for Core compatibility */
 986         if (env->nr_cores > 1) {
 987                 *eax = (env->nr_cores - 1) << 26;
 988         } else {
 989                 *eax = 0;
 990         }
 991         switch (count) {
 992             case 0: /* L1 dcache info */
 993                 *eax |= 0x0000121;
 994                 *ebx = 0x1c0003f;
 995                 *ecx = 0x000003f;
 996                 *edx = 0x0000001;
 997                 break;
 998             case 1: /* L1 icache info */
 999                 *eax |= 0x0000122;
1000                 *ebx = 0x1c0003f;
1001                 *ecx = 0x000003f;
1002                 *edx = 0x0000001;
1003                 break;
1004             case 2: /* L2 cache info */
1005                 *eax |= 0x0000143;
1006                 if (env->nr_threads > 1) {
1007                     *eax |= (env->nr_threads - 1) << 14;
1008                 }
1009                 *ebx = 0x3c0003f;
1010                 *ecx = 0x0000fff;
1011                 *edx = 0x0000001;
1012                 break;
1013             default: /* end of info */
1014                 *eax = 0;
1015                 *ebx = 0;
1016                 *ecx = 0;
1017                 *edx = 0;
1018                 break;
1019         }
1020         break;
1021     case 5:
1022         /* mwait info: needed for Core compatibility */
1023         *eax = 0; /* Smallest monitor-line size in bytes */
1024         *ebx = 0; /* Largest monitor-line size in bytes */
1025         *ecx = CPUID_MWAIT_EMX | CPUID_MWAIT_IBE;
1026         *edx = 0;
1027         break;
1028     case 6:
1029         /* Thermal and Power Leaf */
1030         *eax = 0;
1031         *ebx = 0;
1032         *ecx = 0;
1033         *edx = 0;
1034         break;
1035     case 9:
1036         /* Direct Cache Access Information Leaf */
1037         *eax = 0; /* Bits 0-31 in DCA_CAP MSR */
1038         *ebx = 0;
1039         *ecx = 0;
1040         *edx = 0;
1041         break;
1042     case 0xA:
1043         /* Architectural Performance Monitoring Leaf */
1044         *eax = 0;
1045         *ebx = 0;
1046         *ecx = 0;
1047         *edx = 0;
1048         break;
1049     case 0x80000000:
1050         *eax = env->cpuid_xlevel;
1051         *ebx = env->cpuid_vendor1;
1052         *edx = env->cpuid_vendor2;
1053         *ecx = env->cpuid_vendor3;
1054         break;
1055     case 0x80000001:
1056         *eax = env->cpuid_version;
1057         *ebx = 0;
1058         *ecx = env->cpuid_ext3_features;
1059         *edx = env->cpuid_ext2_features;
1060
1061         /* The Linux kernel checks for the CMPLegacy bit and
1062          * discards multiple thread information if it is set.
1063          * So dont set it here for Intel to make Linux guests happy.
1064          */
1065         if (env->nr_cores * env->nr_threads > 1) {
1066             uint32_t tebx, tecx, tedx;
1067             get_cpuid_vendor(env, &tebx, &tecx, &tedx);
1068             if (tebx != CPUID_VENDOR_INTEL_1 ||
1069                 tedx != CPUID_VENDOR_INTEL_2 ||
1070                 tecx != CPUID_VENDOR_INTEL_3) {
1071                 *ecx |= 1 << 1;    /* CmpLegacy bit */
1072             }
1073         }
1074
1075         if (kvm_enabled()) {
1076             /* Nested SVM not yet supported in upstream QEMU */
1077             *ecx &= ~CPUID_EXT3_SVM;
1078         }
1079         break;
1080     case 0x80000002:
1081     case 0x80000003:
1082     case 0x80000004:
1083         *eax = env->cpuid_model[(index - 0x80000002) * 4 + 0];
1084         *ebx = env->cpuid_model[(index - 0x80000002) * 4 + 1];
1085         *ecx = env->cpuid_model[(index - 0x80000002) * 4 + 2];
1086         *edx = env->cpuid_model[(index - 0x80000002) * 4 + 3];
1087         break;
1088     case 0x80000005:
1089         /* cache info (L1 cache) */
1090         *eax = 0x01ff01ff;
1091         *ebx = 0x01ff01ff;
1092         *ecx = 0x40020140;
1093         *edx = 0x40020140;
1094         break;
1095     case 0x80000006:
1096         /* cache info (L2 cache) */
1097         *eax = 0;
1098         *ebx = 0x42004200;
1099         *ecx = 0x02008140;
1100         *edx = 0;
1101         break;
1102     case 0x80000008:
1103         /* virtual & phys address size in low 2 bytes. */
1104 /* XXX: This value must match the one used in the MMU code. */
1105         if (env->cpuid_ext2_features & CPUID_EXT2_LM) {
1106             /* 64 bit processor */
1107 /* XXX: The physical address space is limited to 42 bits in exec.c. */
1108             *eax = 0x00003028;  /* 48 bits virtual, 40 bits physical */
1109         } else {
1110             if (env->cpuid_features & CPUID_PSE36)
1111                 *eax = 0x00000024; /* 36 bits physical */
1112             else
1113                 *eax = 0x00000020; /* 32 bits physical */
1114         }
1115         *ebx = 0;
1116         *ecx = 0;
1117         *edx = 0;
1118         if (env->nr_cores * env->nr_threads > 1) {
1119             *ecx |= (env->nr_cores * env->nr_threads) - 1;
1120         }
1121         break;
1122     case 0x8000000A:
1123         *eax = 0x00000001; /* SVM Revision */
1124         *ebx = 0x00000010; /* nr of ASIDs */
1125         *ecx = 0;
1126         *edx = 0; /* optional features */
1127         break;
1128     default:
1129         /* reserved values: zero */
1130         *eax = 0;
1131         *ebx = 0;
1132         *ecx = 0;
1133         *edx = 0;
1134         break;
1135     }
1136 }