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", "kvmclock", "kvm_asyncpf", NULL, NULL, NULL,
  77     NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  78     NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  79     NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  80 };
  81
  82 static const char *svm_feature_name[] = {
  83     "npt", "lbrv", "svm_lock", "nrip_save",
  84     "tsc_scale", "vmcb_clean",  "flushbyasid", "decodeassists",
  85     NULL, NULL, "pause_filter", NULL,
  86     "pfthreshold", NULL, NULL, NULL,
  87     NULL, NULL, NULL, NULL,
  88     NULL, NULL, NULL, NULL,
  89     NULL, NULL, NULL, NULL,
  90     NULL, NULL, NULL, NULL,
  91 };
  92
  93 /* collects per-function cpuid data
  94  */
  95 typedef struct model_features_t {
  96     uint32_t *guest_feat;
  97     uint32_t *host_feat;
  98     uint32_t check_feat;
  99     const char **flag_names;
 100     uint32_t cpuid;
 101     } model_features_t;
 102
 103 int check_cpuid = 0;
 104 int enforce_cpuid = 0;
 105
 106 void host_cpuid(uint32_t function, uint32_t count,
 107                 uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
 108 {
 109 #if defined(CONFIG_KVM)
 110     uint32_t vec[4];
 111
 112 #ifdef __x86_64__
 113     asm volatile("cpuid"
 114                  : "=a"(vec[0]), "=b"(vec[1]),
 115                    "=c"(vec[2]), "=d"(vec[3])
 116                  : "0"(function), "c"(count) : "cc");
 117 #else
 118     asm volatile("pusha \n\t"
 119                  "cpuid \n\t"
 120                  "mov %%eax, 0(%2) \n\t"
 121                  "mov %%ebx, 4(%2) \n\t"
 122                  "mov %%ecx, 8(%2) \n\t"
 123                  "mov %%edx, 12(%2) \n\t"
 124                  "popa"
 125                  : : "a"(function), "c"(count), "S"(vec)
 126                  : "memory", "cc");
 127 #endif
 128
 129     if (eax)
 130         *eax = vec[0];
 131     if (ebx)
 132         *ebx = vec[1];
 133     if (ecx)
 134         *ecx = vec[2];
 135     if (edx)
 136         *edx = vec[3];
 137 #endif
 138 }
 139
 140 #define iswhite(c) ((c) && ((c) <= ' ' || '~' < (c)))
 141
 142 /* general substring compare of *[s1..e1) and *[s2..e2).  sx is start of
 143  * a substring.  ex if !NULL points to the first char after a substring,
 144  * otherwise the string is assumed to sized by a terminating nul.
 145  * Return lexical ordering of *s1:*s2.
 146  */
 147 static int sstrcmp(const char *s1, const char *e1, const char *s2,
 148     const char *e2)
 149 {
 150     for (;;) {
 151         if (!*s1 || !*s2 || *s1 != *s2)
 152             return (*s1 - *s2);
 153         ++s1, ++s2;
 154         if (s1 == e1 && s2 == e2)
 155             return (0);
 156         else if (s1 == e1)
 157             return (*s2);
 158         else if (s2 == e2)
 159             return (*s1);
 160     }
 161 }
 162
 163 /* compare *[s..e) to *altstr.  *altstr may be a simple string or multiple
 164  * '|' delimited (possibly empty) strings in which case search for a match
 165  * within the alternatives proceeds left to right.  Return 0 for success,
 166  * non-zero otherwise.
 167  */
 168 static int altcmp(const char *s, const char *e, const char *altstr)
 169 {
 170     const char *p, *q;
 171
 172     for (q = p = altstr; ; ) {
 173         while (*p && *p != '|')
 174             ++p;
 175         if ((q == p && !*s) || (q != p && !sstrcmp(s, e, q, p)))
 176             return (0);
 177         if (!*p)
 178             return (1);
 179         else
 180             q = ++p;
 181     }
 182 }
 183
 184 /* search featureset for flag *[s..e), if found set corresponding bit in
 185  * *pval and return true, otherwise return false
 186  */
 187 static bool lookup_feature(uint32_t *pval, const char *s, const char *e,
 188                            const char **featureset)
 189 {
 190     uint32_t mask;
 191     const char **ppc;
 192     bool found = false;
 193
 194     for (mask = 1, ppc = featureset; mask; mask <<= 1, ++ppc) {
 195         if (*ppc && !altcmp(s, e, *ppc)) {
 196             *pval |= mask;
 197             found = true;
 198         }
 199     }
 200     return found;
 201 }
 202
 203 static void add_flagname_to_bitmaps(const char *flagname, uint32_t *features,
 204                                     uint32_t *ext_features,
 205                                     uint32_t *ext2_features,
 206                                     uint32_t *ext3_features,
 207                                     uint32_t *kvm_features,
 208                                     uint32_t *svm_features)
 209 {
 210     if (!lookup_feature(features, flagname, NULL, feature_name) &&
 211         !lookup_feature(ext_features, flagname, NULL, ext_feature_name) &&
 212         !lookup_feature(ext2_features, flagname, NULL, ext2_feature_name) &&
 213         !lookup_feature(ext3_features, flagname, NULL, ext3_feature_name) &&
 214         !lookup_feature(kvm_features, flagname, NULL, kvm_feature_name) &&
 215         !lookup_feature(svm_features, flagname, NULL, svm_feature_name))
 216             fprintf(stderr, "CPU feature %s not found\n", flagname);
 217 }
 218
 219 typedef struct x86_def_t {
 220     struct x86_def_t *next;
 221     const char *name;
 222     uint32_t level;
 223     uint32_t vendor1, vendor2, vendor3;
 224     int family;
 225     int model;
 226     int stepping;
 227     int tsc_khz;
 228     uint32_t features, ext_features, ext2_features, ext3_features;
 229     uint32_t kvm_features, svm_features;
 230     uint32_t xlevel;
 231     char model_id[48];
 232     int vendor_override;
 233     uint32_t flags;
 234     /* Store the results of Centaur's CPUID instructions */
 235     uint32_t ext4_features;
 236     uint32_t xlevel2;
 237 } x86_def_t;
 238
 239 #define I486_FEATURES (CPUID_FP87 | CPUID_VME | CPUID_PSE)
 240 #define PENTIUM_FEATURES (I486_FEATURES | CPUID_DE | CPUID_TSC | \
 241           CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_MMX | CPUID_APIC)
 242 #define PENTIUM2_FEATURES (PENTIUM_FEATURES | CPUID_PAE | CPUID_SEP | \
 243           CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | CPUID_PAT | \
 244           CPUID_PSE36 | CPUID_FXSR)
 245 #define PENTIUM3_FEATURES (PENTIUM2_FEATURES | CPUID_SSE)
 246 #define PPRO_FEATURES (CPUID_FP87 | CPUID_DE | CPUID_PSE | CPUID_TSC | \
 247           CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_PGE | CPUID_CMOV | \
 248           CPUID_PAT | CPUID_FXSR | CPUID_MMX | CPUID_SSE | CPUID_SSE2 | \
 249           CPUID_PAE | CPUID_SEP | CPUID_APIC)
 250 #define EXT2_FEATURE_MASK 0x0183F3FF
 251
 252 #define TCG_FEATURES (CPUID_FP87 | CPUID_PSE | CPUID_TSC | CPUID_MSR | \
 253           CPUID_PAE | CPUID_MCE | CPUID_CX8 | CPUID_APIC | CPUID_SEP | \
 254           CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | CPUID_PAT | \
 255           CPUID_PSE36 | CPUID_CLFLUSH | CPUID_ACPI | CPUID_MMX | \
 256           CPUID_FXSR | CPUID_SSE | CPUID_SSE2 | CPUID_SS)
 257           /* partly implemented:
 258           CPUID_MTRR, CPUID_MCA, CPUID_CLFLUSH (needed for Win64)
 259           CPUID_PSE36 (needed for Solaris) */
 260           /* missing:
 261           CPUID_VME, CPUID_DTS, CPUID_SS, CPUID_HT, CPUID_TM, CPUID_PBE */
 262 #define TCG_EXT_FEATURES (CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | \
 263           CPUID_EXT_CX16 | CPUID_EXT_POPCNT | \
 264           CPUID_EXT_HYPERVISOR)
 265           /* missing:
 266           CPUID_EXT_DTES64, CPUID_EXT_DSCPL, CPUID_EXT_VMX, CPUID_EXT_EST,
 267           CPUID_EXT_TM2, CPUID_EXT_XTPR, CPUID_EXT_PDCM, CPUID_EXT_XSAVE */
 268 #define TCG_EXT2_FEATURES ((TCG_FEATURES & EXT2_FEATURE_MASK) | \
 269           CPUID_EXT2_NX | CPUID_EXT2_MMXEXT | CPUID_EXT2_RDTSCP | \
 270           CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT)
 271           /* missing:
 272           CPUID_EXT2_PDPE1GB */
 273 #define TCG_EXT3_FEATURES (CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM | \
 274           CPUID_EXT3_CR8LEG | CPUID_EXT3_ABM | CPUID_EXT3_SSE4A)
 275 #define TCG_SVM_FEATURES 0
 276
 277 /* maintains list of cpu model definitions
 278  */
 279 static x86_def_t *x86_defs = {NULL};
 280
 281 /* built-in cpu model definitions (deprecated)
 282  */
 283 static x86_def_t builtin_x86_defs[] = {
 284     {
 285         .name = "qemu64",
 286         .level = 4,
 287         .vendor1 = CPUID_VENDOR_AMD_1,
 288         .vendor2 = CPUID_VENDOR_AMD_2,
 289         .vendor3 = CPUID_VENDOR_AMD_3,
 290         .family = 6,
 291         .model = 2,
 292         .stepping = 3,
 293         .features = PPRO_FEATURES |
 294             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
 295             CPUID_PSE36,
 296         .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16 | CPUID_EXT_POPCNT,
 297         .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
 298             CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
 299         .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
 300             CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
 301         .xlevel = 0x8000000A,
 302         .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
 303     },
 304     {
 305         .name = "phenom",
 306         .level = 5,
 307         .vendor1 = CPUID_VENDOR_AMD_1,
 308         .vendor2 = CPUID_VENDOR_AMD_2,
 309         .vendor3 = CPUID_VENDOR_AMD_3,
 310         .family = 16,
 311         .model = 2,
 312         .stepping = 3,
 313         .features = PPRO_FEATURES |
 314             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
 315             CPUID_PSE36 | CPUID_VME | CPUID_HT,
 316         .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_CX16 |
 317             CPUID_EXT_POPCNT,
 318         .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
 319             CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX |
 320             CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT | CPUID_EXT2_MMXEXT |
 321             CPUID_EXT2_FFXSR | CPUID_EXT2_PDPE1GB | CPUID_EXT2_RDTSCP,
 322         /* Missing: CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
 323                     CPUID_EXT3_CR8LEG,
 324                     CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
 325                     CPUID_EXT3_OSVW, CPUID_EXT3_IBS */
 326         .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
 327             CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
 328         .svm_features = CPUID_SVM_NPT | CPUID_SVM_LBRV,
 329         .xlevel = 0x8000001A,
 330         .model_id = "AMD Phenom(tm) 9550 Quad-Core Processor"
 331     },
 332     {
 333         .name = "core2duo",
 334         .level = 10,
 335         .family = 6,
 336         .model = 15,
 337         .stepping = 11,
 338         .features = PPRO_FEATURES |
 339             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
 340             CPUID_PSE36 | CPUID_VME | CPUID_DTS | CPUID_ACPI | CPUID_SS |
 341             CPUID_HT | CPUID_TM | CPUID_PBE,
 342         .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
 343             CPUID_EXT_DTES64 | CPUID_EXT_DSCPL | CPUID_EXT_VMX | CPUID_EXT_EST |
 344             CPUID_EXT_TM2 | CPUID_EXT_CX16 | CPUID_EXT_XTPR | CPUID_EXT_PDCM,
 345         .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
 346         .ext3_features = CPUID_EXT3_LAHF_LM,
 347         .xlevel = 0x80000008,
 348         .model_id = "Intel(R) Core(TM)2 Duo CPU     T7700  @ 2.40GHz",
 349     },
 350     {
 351         .name = "kvm64",
 352         .level = 5,
 353         .vendor1 = CPUID_VENDOR_INTEL_1,
 354         .vendor2 = CPUID_VENDOR_INTEL_2,
 355         .vendor3 = CPUID_VENDOR_INTEL_3,
 356         .family = 15,
 357         .model = 6,
 358         .stepping = 1,
 359         /* Missing: CPUID_VME, CPUID_HT */
 360         .features = PPRO_FEATURES |
 361             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
 362             CPUID_PSE36,
 363         /* Missing: CPUID_EXT_POPCNT, CPUID_EXT_MONITOR */
 364         .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16,
 365         /* Missing: CPUID_EXT2_PDPE1GB, CPUID_EXT2_RDTSCP */
 366         .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
 367             CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
 368         /* Missing: CPUID_EXT3_LAHF_LM, CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
 369                     CPUID_EXT3_CR8LEG, CPUID_EXT3_ABM, CPUID_EXT3_SSE4A,
 370                     CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
 371                     CPUID_EXT3_OSVW, CPUID_EXT3_IBS, CPUID_EXT3_SVM */
 372         .ext3_features = 0,
 373         .xlevel = 0x80000008,
 374         .model_id = "Common KVM processor"
 375     },
 376     {
 377         .name = "qemu32",
 378         .level = 4,
 379         .family = 6,
 380         .model = 3,
 381         .stepping = 3,
 382         .features = PPRO_FEATURES,
 383         .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_POPCNT,
 384         .xlevel = 0x80000004,
 385         .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
 386     },
 387     {
 388         .name = "kvm32",
 389         .level = 5,
 390         .family = 15,
 391         .model = 6,
 392         .stepping = 1,
 393         .features = PPRO_FEATURES |
 394             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_PSE36,
 395         .ext_features = CPUID_EXT_SSE3,
 396         .ext2_features = PPRO_FEATURES & EXT2_FEATURE_MASK,
 397         .ext3_features = 0,
 398         .xlevel = 0x80000008,
 399         .model_id = "Common 32-bit KVM processor"
 400     },
 401     {
 402         .name = "coreduo",
 403         .level = 10,
 404         .family = 6,
 405         .model = 14,
 406         .stepping = 8,
 407         .features = PPRO_FEATURES | CPUID_VME |
 408             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_DTS | CPUID_ACPI |
 409             CPUID_SS | CPUID_HT | CPUID_TM | CPUID_PBE,
 410         .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_VMX |
 411             CPUID_EXT_EST | CPUID_EXT_TM2 | CPUID_EXT_XTPR | CPUID_EXT_PDCM,
 412         .ext2_features = CPUID_EXT2_NX,
 413         .xlevel = 0x80000008,
 414         .model_id = "Genuine Intel(R) CPU           T2600  @ 2.16GHz",
 415     },
 416     {
 417         .name = "486",
 418         .level = 1,
 419         .family = 4,
 420         .model = 0,
 421         .stepping = 0,
 422         .features = I486_FEATURES,
 423         .xlevel = 0,
 424     },
 425     {
 426         .name = "pentium",
 427         .level = 1,
 428         .family = 5,
 429         .model = 4,
 430         .stepping = 3,
 431         .features = PENTIUM_FEATURES,
 432         .xlevel = 0,
 433     },
 434     {
 435         .name = "pentium2",
 436         .level = 2,
 437         .family = 6,
 438         .model = 5,
 439         .stepping = 2,
 440         .features = PENTIUM2_FEATURES,
 441         .xlevel = 0,
 442     },
 443     {
 444         .name = "pentium3",
 445         .level = 2,
 446         .family = 6,
 447         .model = 7,
 448         .stepping = 3,
 449         .features = PENTIUM3_FEATURES,
 450         .xlevel = 0,
 451     },
 452     {
 453         .name = "athlon",
 454         .level = 2,
 455         .vendor1 = CPUID_VENDOR_AMD_1,
 456         .vendor2 = CPUID_VENDOR_AMD_2,
 457         .vendor3 = CPUID_VENDOR_AMD_3,
 458         .family = 6,
 459         .model = 2,
 460         .stepping = 3,
 461         .features = PPRO_FEATURES | CPUID_PSE36 | CPUID_VME | CPUID_MTRR | CPUID_MCA,
 462         .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) | CPUID_EXT2_MMXEXT | CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT,
 463         .xlevel = 0x80000008,
 464         /* XXX: put another string ? */
 465         .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
 466     },
 467     {
 468         .name = "n270",
 469         /* original is on level 10 */
 470         .level = 5,
 471         .family = 6,
 472         .model = 28,
 473         .stepping = 2,
 474         .features = PPRO_FEATURES |
 475             CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_VME | CPUID_DTS |
 476             CPUID_ACPI | CPUID_SS | CPUID_HT | CPUID_TM | CPUID_PBE,
 477             /* Some CPUs got no CPUID_SEP */
 478         .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
 479             CPUID_EXT_DSCPL | CPUID_EXT_EST | CPUID_EXT_TM2 | CPUID_EXT_XTPR,
 480         .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) | CPUID_EXT2_NX,
 481         .ext3_features = CPUID_EXT3_LAHF_LM,
 482         .xlevel = 0x8000000A,
 483         .model_id = "Intel(R) Atom(TM) CPU N270   @ 1.60GHz",
 484     },
 485 };
 486
 487 static int cpu_x86_fill_model_id(char *str)
 488 {
 489     uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
 490     int i;
 491
 492     for (i = 0; i < 3; i++) {
 493         host_cpuid(0x80000002 + i, 0, &eax, &ebx, &ecx, &edx);
 494         memcpy(str + i * 16 +  0, &eax, 4);
 495         memcpy(str + i * 16 +  4, &ebx, 4);
 496         memcpy(str + i * 16 +  8, &ecx, 4);
 497         memcpy(str + i * 16 + 12, &edx, 4);
 498     }
 499     return 0;
 500 }
 501
 502 static int cpu_x86_fill_host(x86_def_t *x86_cpu_def)
 503 {
 504     uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
 505
 506     x86_cpu_def->name = "host";
 507     host_cpuid(0x0, 0, &eax, &ebx, &ecx, &edx);
 508     x86_cpu_def->level = eax;
 509     x86_cpu_def->vendor1 = ebx;
 510     x86_cpu_def->vendor2 = edx;
 511     x86_cpu_def->vendor3 = ecx;
 512
 513     host_cpuid(0x1, 0, &eax, &ebx, &ecx, &edx);
 514     x86_cpu_def->family = ((eax >> 8) & 0x0F) + ((eax >> 20) & 0xFF);
 515     x86_cpu_def->model = ((eax >> 4) & 0x0F) | ((eax & 0xF0000) >> 12);
 516     x86_cpu_def->stepping = eax & 0x0F;
 517     x86_cpu_def->ext_features = ecx;
 518     x86_cpu_def->features = edx;
 519
 520     host_cpuid(0x80000000, 0, &eax, &ebx, &ecx, &edx);
 521     x86_cpu_def->xlevel = eax;
 522
 523     host_cpuid(0x80000001, 0, &eax, &ebx, &ecx, &edx);
 524     x86_cpu_def->ext2_features = edx;
 525     x86_cpu_def->ext3_features = ecx;
 526     cpu_x86_fill_model_id(x86_cpu_def->model_id);
 527     x86_cpu_def->vendor_override = 0;
 528
 529     /* Call Centaur's CPUID instruction. */
 530     if (x86_cpu_def->vendor1 == CPUID_VENDOR_VIA_1 &&
 531         x86_cpu_def->vendor2 == CPUID_VENDOR_VIA_2 &&
 532         x86_cpu_def->vendor3 == CPUID_VENDOR_VIA_3) {
 533         host_cpuid(0xC0000000, 0, &eax, &ebx, &ecx, &edx);
 534         if (eax >= 0xC0000001) {
 535             /* Support VIA max extended level */
 536             x86_cpu_def->xlevel2 = eax;
 537             host_cpuid(0xC0000001, 0, &eax, &ebx, &ecx, &edx);
 538             x86_cpu_def->ext4_features = edx;
 539         }
 540     }
 541
 542     /*
 543      * Every SVM feature requires emulation support in KVM - so we can't just
 544      * read the host features here. KVM might even support SVM features not
 545      * available on the host hardware. Just set all bits and mask out the
 546      * unsupported ones later.
 547      */
 548     x86_cpu_def->svm_features = -1;
 549
 550     return 0;
 551 }
 552
 553 static int unavailable_host_feature(struct model_features_t *f, uint32_t mask)
 554 {
 555     int i;
 556
 557     for (i = 0; i < 32; ++i)
 558         if (1 << i & mask) {
 559             fprintf(stderr, "warning: host cpuid %04x_%04x lacks requested"
 560                 " flag '%s' [0x%08x]\n",
 561                 f->cpuid >> 16, f->cpuid & 0xffff,
 562                 f->flag_names[i] ? f->flag_names[i] : "[reserved]", mask);
 563             break;
 564         }
 565     return 0;
 566 }
 567
 568 /* best effort attempt to inform user requested cpu flags aren't making
 569  * their way to the guest.  Note: ft[].check_feat ideally should be
 570  * specified via a guest_def field to suppress report of extraneous flags.
 571  */
 572 static int check_features_against_host(x86_def_t *guest_def)
 573 {
 574     x86_def_t host_def;
 575     uint32_t mask;
 576     int rv, i;
 577     struct model_features_t ft[] = {
 578         {&guest_def->features, &host_def.features,
 579             ~0, feature_name, 0x00000000},
 580         {&guest_def->ext_features, &host_def.ext_features,
 581             ~CPUID_EXT_HYPERVISOR, ext_feature_name, 0x00000001},
 582         {&guest_def->ext2_features, &host_def.ext2_features,
 583             ~PPRO_FEATURES, ext2_feature_name, 0x80000000},
 584         {&guest_def->ext3_features, &host_def.ext3_features,
 585             ~CPUID_EXT3_SVM, ext3_feature_name, 0x80000001}};
 586
 587     cpu_x86_fill_host(&host_def);
 588     for (rv = 0, i = 0; i < ARRAY_SIZE(ft); ++i)
 589         for (mask = 1; mask; mask <<= 1)
 590             if (ft[i].check_feat & mask && *ft[i].guest_feat & mask &&
 591                 !(*ft[i].host_feat & mask)) {
 592                     unavailable_host_feature(&ft[i], mask);
 593                     rv = 1;
 594                 }
 595     return rv;
 596 }
 597
 598 static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model)
 599 {
 600     unsigned int i;
 601     x86_def_t *def;
 602
 603     char *s = g_strdup(cpu_model);
 604     char *featurestr, *name = strtok(s, ",");
 605     /* Features to be added*/
 606     uint32_t plus_features = 0, plus_ext_features = 0;
 607     uint32_t plus_ext2_features = 0, plus_ext3_features = 0;
 608     uint32_t plus_kvm_features = 0, plus_svm_features = 0;
 609     /* Features to be removed */
 610     uint32_t minus_features = 0, minus_ext_features = 0;
 611     uint32_t minus_ext2_features = 0, minus_ext3_features = 0;
 612     uint32_t minus_kvm_features = 0, minus_svm_features = 0;
 613     uint32_t numvalue;
 614
 615     for (def = x86_defs; def; def = def->next)
 616         if (name && !strcmp(name, def->name))
 617             break;
 618     if (kvm_enabled() && name && strcmp(name, "host") == 0) {
 619         cpu_x86_fill_host(x86_cpu_def);
 620     } else if (!def) {
 621         goto error;
 622     } else {
 623         memcpy(x86_cpu_def, def, sizeof(*def));
 624     }
 625
 626     plus_kvm_features = ~0; /* not supported bits will be filtered out later */
 627
 628     add_flagname_to_bitmaps("hypervisor", &plus_features,
 629         &plus_ext_features, &plus_ext2_features, &plus_ext3_features,
 630         &plus_kvm_features, &plus_svm_features);
 631
 632     featurestr = strtok(NULL, ",");
 633
 634     while (featurestr) {
 635         char *val;
 636         if (featurestr[0] == '+') {
 637             add_flagname_to_bitmaps(featurestr + 1, &plus_features,
 638                             &plus_ext_features, &plus_ext2_features,
 639                             &plus_ext3_features, &plus_kvm_features,
 640                             &plus_svm_features);
 641         } else if (featurestr[0] == '-') {
 642             add_flagname_to_bitmaps(featurestr + 1, &minus_features,
 643                             &minus_ext_features, &minus_ext2_features,
 644                             &minus_ext3_features, &minus_kvm_features,
 645                             &minus_svm_features);
 646         } else if ((val = strchr(featurestr, '='))) {
 647             *val = 0; val++;
 648             if (!strcmp(featurestr, "family")) {
 649                 char *err;
 650                 numvalue = strtoul(val, &err, 0);
 651                 if (!*val || *err) {
 652                     fprintf(stderr, "bad numerical value %s\n", val);
 653                     goto error;
 654                 }
 655                 x86_cpu_def->family = numvalue;
 656             } else if (!strcmp(featurestr, "model")) {
 657                 char *err;
 658                 numvalue = strtoul(val, &err, 0);
 659                 if (!*val || *err || numvalue > 0xff) {
 660                     fprintf(stderr, "bad numerical value %s\n", val);
 661                     goto error;
 662                 }
 663                 x86_cpu_def->model = numvalue;
 664             } else if (!strcmp(featurestr, "stepping")) {
 665                 char *err;
 666                 numvalue = strtoul(val, &err, 0);
 667                 if (!*val || *err || numvalue > 0xf) {
 668                     fprintf(stderr, "bad numerical value %s\n", val);
 669                     goto error;
 670                 }
 671                 x86_cpu_def->stepping = numvalue ;
 672             } else if (!strcmp(featurestr, "level")) {
 673                 char *err;
 674                 numvalue = strtoul(val, &err, 0);
 675                 if (!*val || *err) {
 676                     fprintf(stderr, "bad numerical value %s\n", val);
 677                     goto error;
 678                 }
 679                 x86_cpu_def->level = numvalue;
 680             } else if (!strcmp(featurestr, "xlevel")) {
 681                 char *err;
 682                 numvalue = strtoul(val, &err, 0);
 683                 if (!*val || *err) {
 684                     fprintf(stderr, "bad numerical value %s\n", val);
 685                     goto error;
 686                 }
 687                 if (numvalue < 0x80000000) {
 688                     numvalue += 0x80000000;
 689                 }
 690                 x86_cpu_def->xlevel = numvalue;
 691             } else if (!strcmp(featurestr, "vendor")) {
 692                 if (strlen(val) != 12) {
 693                     fprintf(stderr, "vendor string must be 12 chars long\n");
 694                     goto error;
 695                 }
 696                 x86_cpu_def->vendor1 = 0;
 697                 x86_cpu_def->vendor2 = 0;
 698                 x86_cpu_def->vendor3 = 0;
 699                 for(i = 0; i < 4; i++) {
 700                     x86_cpu_def->vendor1 |= ((uint8_t)val[i    ]) << (8 * i);
 701                     x86_cpu_def->vendor2 |= ((uint8_t)val[i + 4]) << (8 * i);
 702                     x86_cpu_def->vendor3 |= ((uint8_t)val[i + 8]) << (8 * i);
 703                 }
 704                 x86_cpu_def->vendor_override = 1;
 705             } else if (!strcmp(featurestr, "model_id")) {
 706                 pstrcpy(x86_cpu_def->model_id, sizeof(x86_cpu_def->model_id),
 707                         val);
 708             } else if (!strcmp(featurestr, "tsc_freq")) {
 709                 int64_t tsc_freq;
 710                 char *err;
 711
 712                 tsc_freq = strtosz_suffix_unit(val, &err,
 713                                                STRTOSZ_DEFSUFFIX_B, 1000);
 714                 if (tsc_freq < 0 || *err) {
 715                     fprintf(stderr, "bad numerical value %s\n", val);
 716                     goto error;
 717                 }
 718                 x86_cpu_def->tsc_khz = tsc_freq / 1000;
 719             } else {
 720                 fprintf(stderr, "unrecognized feature %s\n", featurestr);
 721                 goto error;
 722             }
 723         } else if (!strcmp(featurestr, "check")) {
 724             check_cpuid = 1;
 725         } else if (!strcmp(featurestr, "enforce")) {
 726             check_cpuid = enforce_cpuid = 1;
 727         } else {
 728             fprintf(stderr, "feature string `%s' not in format (+feature|-feature|feature=xyz)\n", featurestr);
 729             goto error;
 730         }
 731         featurestr = strtok(NULL, ",");
 732     }
 733     x86_cpu_def->features |= plus_features;
 734     x86_cpu_def->ext_features |= plus_ext_features;
 735     x86_cpu_def->ext2_features |= plus_ext2_features;
 736     x86_cpu_def->ext3_features |= plus_ext3_features;
 737     x86_cpu_def->kvm_features |= plus_kvm_features;
 738     x86_cpu_def->svm_features |= plus_svm_features;
 739     x86_cpu_def->features &= ~minus_features;
 740     x86_cpu_def->ext_features &= ~minus_ext_features;
 741     x86_cpu_def->ext2_features &= ~minus_ext2_features;
 742     x86_cpu_def->ext3_features &= ~minus_ext3_features;
 743     x86_cpu_def->kvm_features &= ~minus_kvm_features;
 744     x86_cpu_def->svm_features &= ~minus_svm_features;
 745     if (check_cpuid) {
 746         if (check_features_against_host(x86_cpu_def) && enforce_cpuid)
 747             goto error;
 748     }
 749     g_free(s);
 750     return 0;
 751
 752 error:
 753     g_free(s);
 754     return -1;
 755 }
 756
 757 /* generate a composite string into buf of all cpuid names in featureset
 758  * selected by fbits.  indicate truncation at bufsize in the event of overflow.
 759  * if flags, suppress names undefined in featureset.
 760  */
 761 static void listflags(char *buf, int bufsize, uint32_t fbits,
 762     const char **featureset, uint32_t flags)
 763 {
 764     const char **p = &featureset[31];
 765     char *q, *b, bit;
 766     int nc;
 767
 768     b = 4 <= bufsize ? buf + (bufsize -= 3) - 1 : NULL;
 769     *buf = '\0';
 770     for (q = buf, bit = 31; fbits && bufsize; --p, fbits &= ~(1 << bit), --bit)
 771         if (fbits & 1 << bit && (*p || !flags)) {
 772             if (*p)
 773                 nc = snprintf(q, bufsize, "%s%s", q == buf ? "" : " ", *p);
 774             else
 775                 nc = snprintf(q, bufsize, "%s[%d]", q == buf ? "" : " ", bit);
 776             if (bufsize <= nc) {
 777                 if (b) {
 778                     memcpy(b, "...", sizeof("..."));
 779                 }
 780                 return;
 781             }
 782             q += nc;
 783             bufsize -= nc;
 784         }
 785 }
 786
 787 /* generate CPU information:
 788  * -?        list model names
 789  * -?model   list model names/IDs
 790  * -?dump    output all model (x86_def_t) data
 791  * -?cpuid   list all recognized cpuid flag names
 792  */
 793 void x86_cpu_list(FILE *f, fprintf_function cpu_fprintf, const char *optarg)
 794 {
 795     unsigned char model = !strcmp("?model", optarg);
 796     unsigned char dump = !strcmp("?dump", optarg);
 797     unsigned char cpuid = !strcmp("?cpuid", optarg);
 798     x86_def_t *def;
 799     char buf[256];
 800
 801     if (cpuid) {
 802         (*cpu_fprintf)(f, "Recognized CPUID flags:\n");
 803         listflags(buf, sizeof (buf), (uint32_t)~0, feature_name, 1);
 804         (*cpu_fprintf)(f, "  f_edx: %s\n", buf);
 805         listflags(buf, sizeof (buf), (uint32_t)~0, ext_feature_name, 1);
 806         (*cpu_fprintf)(f, "  f_ecx: %s\n", buf);
 807         listflags(buf, sizeof (buf), (uint32_t)~0, ext2_feature_name, 1);
 808         (*cpu_fprintf)(f, "  extf_edx: %s\n", buf);
 809         listflags(buf, sizeof (buf), (uint32_t)~0, ext3_feature_name, 1);
 810         (*cpu_fprintf)(f, "  extf_ecx: %s\n", buf);
 811         return;
 812     }
 813     for (def = x86_defs; def; def = def->next) {
 814         snprintf(buf, sizeof (buf), def->flags ? "[%s]": "%s", def->name);
 815         if (model || dump) {
 816             (*cpu_fprintf)(f, "x86 %16s  %-48s\n", buf, def->model_id);
 817         } else {
 818             (*cpu_fprintf)(f, "x86 %16s\n", buf);
 819         }
 820         if (dump) {
 821             memcpy(buf, &def->vendor1, sizeof (def->vendor1));
 822             memcpy(buf + 4, &def->vendor2, sizeof (def->vendor2));
 823             memcpy(buf + 8, &def->vendor3, sizeof (def->vendor3));
 824             buf[12] = '\0';
 825             (*cpu_fprintf)(f,
 826                 "  family %d model %d stepping %d level %d xlevel 0x%x"
 827                 " vendor \"%s\"\n",
 828                 def->family, def->model, def->stepping, def->level,
 829                 def->xlevel, buf);
 830             listflags(buf, sizeof (buf), def->features, feature_name, 0);
 831             (*cpu_fprintf)(f, "  feature_edx %08x (%s)\n", def->features,
 832                 buf);
 833             listflags(buf, sizeof (buf), def->ext_features, ext_feature_name,
 834                 0);
 835             (*cpu_fprintf)(f, "  feature_ecx %08x (%s)\n", def->ext_features,
 836                 buf);
 837             listflags(buf, sizeof (buf), def->ext2_features, ext2_feature_name,
 838                 0);
 839             (*cpu_fprintf)(f, "  extfeature_edx %08x (%s)\n",
 840                 def->ext2_features, buf);
 841             listflags(buf, sizeof (buf), def->ext3_features, ext3_feature_name,
 842                 0);
 843             (*cpu_fprintf)(f, "  extfeature_ecx %08x (%s)\n",
 844                 def->ext3_features, buf);
 845             (*cpu_fprintf)(f, "\n");
 846         }
 847     }
 848     if (kvm_enabled()) {
 849         (*cpu_fprintf)(f, "x86 %16s\n", "[host]");
 850     }
 851 }
 852
 853 int cpu_x86_register (CPUX86State *env, const char *cpu_model)
 854 {
 855     x86_def_t def1, *def = &def1;
 856
 857     memset(def, 0, sizeof(*def));
 858
 859     if (cpu_x86_find_by_name(def, cpu_model) < 0)
 860         return -1;
 861     if (def->vendor1) {
 862         env->cpuid_vendor1 = def->vendor1;
 863         env->cpuid_vendor2 = def->vendor2;
 864         env->cpuid_vendor3 = def->vendor3;
 865     } else {
 866         env->cpuid_vendor1 = CPUID_VENDOR_INTEL_1;
 867         env->cpuid_vendor2 = CPUID_VENDOR_INTEL_2;
 868         env->cpuid_vendor3 = CPUID_VENDOR_INTEL_3;
 869     }
 870     env->cpuid_vendor_override = def->vendor_override;
 871     env->cpuid_level = def->level;
 872     if (def->family > 0x0f)
 873         env->cpuid_version = 0xf00 | ((def->family - 0x0f) << 20);
 874     else
 875         env->cpuid_version = def->family << 8;
 876     env->cpuid_version |= ((def->model & 0xf) << 4) | ((def->model >> 4) << 16);
 877     env->cpuid_version |= def->stepping;
 878     env->cpuid_features = def->features;
 879     env->cpuid_ext_features = def->ext_features;
 880     env->cpuid_ext2_features = def->ext2_features;
 881     env->cpuid_ext3_features = def->ext3_features;
 882     env->cpuid_xlevel = def->xlevel;
 883     env->cpuid_kvm_features = def->kvm_features;
 884     env->cpuid_svm_features = def->svm_features;
 885     env->cpuid_ext4_features = def->ext4_features;
 886     env->cpuid_xlevel2 = def->xlevel2;
 887     env->tsc_khz = def->tsc_khz;
 888     if (!kvm_enabled()) {
 889         env->cpuid_features &= TCG_FEATURES;
 890         env->cpuid_ext_features &= TCG_EXT_FEATURES;
 891         env->cpuid_ext2_features &= (TCG_EXT2_FEATURES
 892 #ifdef TARGET_X86_64
 893             | CPUID_EXT2_SYSCALL | CPUID_EXT2_LM
 894 #endif
 895             );
 896         env->cpuid_ext3_features &= TCG_EXT3_FEATURES;
 897         env->cpuid_svm_features &= TCG_SVM_FEATURES;
 898     }
 899     {
 900         const char *model_id = def->model_id;
 901         int c, len, i;
 902         if (!model_id)
 903             model_id = "";
 904         len = strlen(model_id);
 905         for(i = 0; i < 48; i++) {
 906             if (i >= len)
 907                 c = '\0';
 908             else
 909                 c = (uint8_t)model_id[i];
 910             env->cpuid_model[i >> 2] |= c << (8 * (i & 3));
 911         }
 912     }
 913     return 0;
 914 }
 915
 916 #if !defined(CONFIG_USER_ONLY)
 917 /* copy vendor id string to 32 bit register, nul pad as needed
 918  */
 919 static void cpyid(const char *s, uint32_t *id)
 920 {
 921     char *d = (char *)id;
 922     char i;
 923
 924     for (i = sizeof (*id); i--; )
 925         *d++ = *s ? *s++ : '\0';
 926 }
 927
 928 /* interpret radix and convert from string to arbitrary scalar,
 929  * otherwise flag failure
 930  */
 931 #define setscalar(pval, str, perr)                      \
 932 {                                                       \
 933     char *pend;                                         \
 934     unsigned long ul;                                   \
 935                                                         \
 936     ul = strtoul(str, &pend, 0);                        \
 937     *str && !*pend ? (*pval = ul) : (*perr = 1);        \
 938 }
 939
 940 /* map cpuid options to feature bits, otherwise return failure
 941  * (option tags in *str are delimited by whitespace)
 942  */
 943 static void setfeatures(uint32_t *pval, const char *str,
 944     const char **featureset, int *perr)
 945 {
 946     const char *p, *q;
 947
 948     for (q = p = str; *p || *q; q = p) {
 949         while (iswhite(*p))
 950             q = ++p;
 951         while (*p && !iswhite(*p))
 952             ++p;
 953         if (!*q && !*p)
 954             return;
 955         if (!lookup_feature(pval, q, p, featureset)) {
 956             fprintf(stderr, "error: feature \"%.*s\" not available in set\n",
 957                 (int)(p - q), q);
 958             *perr = 1;
 959             return;
 960         }
 961     }
 962 }
 963
 964 /* map config file options to x86_def_t form
 965  */
 966 static int cpudef_setfield(const char *name, const char *str, void *opaque)
 967 {
 968     x86_def_t *def = opaque;
 969     int err = 0;
 970
 971     if (!strcmp(name, "name")) {
 972         g_free((void *)def->name);
 973         def->name = g_strdup(str);
 974     } else if (!strcmp(name, "model_id")) {
 975         strncpy(def->model_id, str, sizeof (def->model_id));
 976     } else if (!strcmp(name, "level")) {
 977         setscalar(&def->level, str, &err)
 978     } else if (!strcmp(name, "vendor")) {
 979         cpyid(&str[0], &def->vendor1);
 980         cpyid(&str[4], &def->vendor2);
 981         cpyid(&str[8], &def->vendor3);
 982     } else if (!strcmp(name, "family")) {
 983         setscalar(&def->family, str, &err)
 984     } else if (!strcmp(name, "model")) {
 985         setscalar(&def->model, str, &err)
 986     } else if (!strcmp(name, "stepping")) {
 987         setscalar(&def->stepping, str, &err)
 988     } else if (!strcmp(name, "feature_edx")) {
 989         setfeatures(&def->features, str, feature_name, &err);
 990     } else if (!strcmp(name, "feature_ecx")) {
 991         setfeatures(&def->ext_features, str, ext_feature_name, &err);
 992     } else if (!strcmp(name, "extfeature_edx")) {
 993         setfeatures(&def->ext2_features, str, ext2_feature_name, &err);
 994     } else if (!strcmp(name, "extfeature_ecx")) {
 995         setfeatures(&def->ext3_features, str, ext3_feature_name, &err);
 996     } else if (!strcmp(name, "xlevel")) {
 997         setscalar(&def->xlevel, str, &err)
 998     } else {
 999         fprintf(stderr, "error: unknown option [%s = %s]\n", name, str);
1000         return (1);
1001     }
1002     if (err) {
1003         fprintf(stderr, "error: bad option value [%s = %s]\n", name, str);
1004         return (1);
1005     }
1006     return (0);
1007 }
1008
1009 /* register config file entry as x86_def_t
1010  */
1011 static int cpudef_register(QemuOpts *opts, void *opaque)
1012 {
1013     x86_def_t *def = g_malloc0(sizeof (x86_def_t));
1014
1015     qemu_opt_foreach(opts, cpudef_setfield, def, 1);
1016     def->next = x86_defs;
1017     x86_defs = def;
1018     return (0);
1019 }
1020
1021 void cpu_clear_apic_feature(CPUX86State *env)
1022 {
1023     env->cpuid_features &= ~CPUID_APIC;
1024 }
1025
1026 #endif /* !CONFIG_USER_ONLY */
1027
1028 /* register "cpudef" models defined in configuration file.  Here we first
1029  * preload any built-in definitions
1030  */
1031 void x86_cpudef_setup(void)
1032 {
1033     int i;
1034
1035     for (i = 0; i < ARRAY_SIZE(builtin_x86_defs); ++i) {
1036         builtin_x86_defs[i].next = x86_defs;
1037         builtin_x86_defs[i].flags = 1;
1038         x86_defs = &builtin_x86_defs[i];
1039     }
1040 #if !defined(CONFIG_USER_ONLY)
1041     qemu_opts_foreach(qemu_find_opts("cpudef"), cpudef_register, NULL, 0);
1042 #endif
1043 }
1044
1045 static void get_cpuid_vendor(CPUX86State *env, uint32_t *ebx,
1046                              uint32_t *ecx, uint32_t *edx)
1047 {
1048     *ebx = env->cpuid_vendor1;
1049     *edx = env->cpuid_vendor2;
1050     *ecx = env->cpuid_vendor3;
1051
1052     /* sysenter isn't supported on compatibility mode on AMD, syscall
1053      * isn't supported in compatibility mode on Intel.
1054      * Normally we advertise the actual cpu vendor, but you can override
1055      * this if you want to use KVM's sysenter/syscall emulation
1056      * in compatibility mode and when doing cross vendor migration
1057      */
1058     if (kvm_enabled() && ! env->cpuid_vendor_override) {
1059         host_cpuid(0, 0, NULL, ebx, ecx, edx);
1060     }
1061 }
1062
1063 void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
1064                    uint32_t *eax, uint32_t *ebx,
1065                    uint32_t *ecx, uint32_t *edx)
1066 {
1067     /* test if maximum index reached */
1068     if (index & 0x80000000) {
1069         if (index > env->cpuid_xlevel) {
1070             if (env->cpuid_xlevel2 > 0) {
1071                 /* Handle the Centaur's CPUID instruction. */
1072                 if (index > env->cpuid_xlevel2) {
1073                     index = env->cpuid_xlevel2;
1074                 } else if (index < 0xC0000000) {
1075                     index = env->cpuid_xlevel;
1076                 }
1077             } else {
1078                 index =  env->cpuid_xlevel;
1079             }
1080         }
1081     } else {
1082         if (index > env->cpuid_level)
1083             index = env->cpuid_level;
1084     }
1085
1086     switch(index) {
1087     case 0:
1088         *eax = env->cpuid_level;
1089         get_cpuid_vendor(env, ebx, ecx, edx);
1090         break;
1091     case 1:
1092         *eax = env->cpuid_version;
1093         *ebx = (env->cpuid_apic_id << 24) | 8 << 8; /* CLFLUSH size in quad words, Linux wants it. */
1094         *ecx = env->cpuid_ext_features;
1095         *edx = env->cpuid_features;
1096         if (env->nr_cores * env->nr_threads > 1) {
1097             *ebx |= (env->nr_cores * env->nr_threads) << 16;
1098             *edx |= 1 << 28;    /* HTT bit */
1099         }
1100         break;
1101     case 2:
1102         /* cache info: needed for Pentium Pro compatibility */
1103         *eax = 1;
1104         *ebx = 0;
1105         *ecx = 0;
1106         *edx = 0x2c307d;
1107         break;
1108     case 4:
1109         /* cache info: needed for Core compatibility */
1110         if (env->nr_cores > 1) {
1111             *eax = (env->nr_cores - 1) << 26;
1112         } else {
1113             *eax = 0;
1114         }
1115         switch (count) {
1116             case 0: /* L1 dcache info */
1117                 *eax |= 0x0000121;
1118                 *ebx = 0x1c0003f;
1119                 *ecx = 0x000003f;
1120                 *edx = 0x0000001;
1121                 break;
1122             case 1: /* L1 icache info */
1123                 *eax |= 0x0000122;
1124                 *ebx = 0x1c0003f;
1125                 *ecx = 0x000003f;
1126                 *edx = 0x0000001;
1127                 break;
1128             case 2: /* L2 cache info */
1129                 *eax |= 0x0000143;
1130                 if (env->nr_threads > 1) {
1131                     *eax |= (env->nr_threads - 1) << 14;
1132                 }
1133                 *ebx = 0x3c0003f;
1134                 *ecx = 0x0000fff;
1135                 *edx = 0x0000001;
1136                 break;
1137             default: /* end of info */
1138                 *eax = 0;
1139                 *ebx = 0;
1140                 *ecx = 0;
1141                 *edx = 0;
1142                 break;
1143         }
1144         break;
1145     case 5:
1146         /* mwait info: needed for Core compatibility */
1147         *eax = 0; /* Smallest monitor-line size in bytes */
1148         *ebx = 0; /* Largest monitor-line size in bytes */
1149         *ecx = CPUID_MWAIT_EMX | CPUID_MWAIT_IBE;
1150         *edx = 0;
1151         break;
1152     case 6:
1153         /* Thermal and Power Leaf */
1154         *eax = 0;
1155         *ebx = 0;
1156         *ecx = 0;
1157         *edx = 0;
1158         break;
1159     case 7:
1160         if (kvm_enabled()) {
1161             KVMState *s = env->kvm_state;
1162
1163             *eax = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EAX);
1164             *ebx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EBX);
1165             *ecx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_ECX);
1166             *edx = kvm_arch_get_supported_cpuid(s, 0x7, count, R_EDX);
1167         } else {
1168             *eax = 0;
1169             *ebx = 0;
1170             *ecx = 0;
1171             *edx = 0;
1172         }
1173         break;
1174     case 9:
1175         /* Direct Cache Access Information Leaf */
1176         *eax = 0; /* Bits 0-31 in DCA_CAP MSR */
1177         *ebx = 0;
1178         *ecx = 0;
1179         *edx = 0;
1180         break;
1181     case 0xA:
1182         /* Architectural Performance Monitoring Leaf */
1183         *eax = 0;
1184         *ebx = 0;
1185         *ecx = 0;
1186         *edx = 0;
1187         break;
1188     case 0xD:
1189         /* Processor Extended State */
1190         if (!(env->cpuid_ext_features & CPUID_EXT_XSAVE)) {
1191             *eax = 0;
1192             *ebx = 0;
1193             *ecx = 0;
1194             *edx = 0;
1195             break;
1196         }
1197         if (kvm_enabled()) {
1198             KVMState *s = env->kvm_state;
1199
1200             *eax = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EAX);
1201             *ebx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EBX);
1202             *ecx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_ECX);
1203             *edx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EDX);
1204         } else {
1205             *eax = 0;
1206             *ebx = 0;
1207             *ecx = 0;
1208             *edx = 0;
1209         }
1210         break;
1211     case 0x80000000:
1212         *eax = env->cpuid_xlevel;
1213         *ebx = env->cpuid_vendor1;
1214         *edx = env->cpuid_vendor2;
1215         *ecx = env->cpuid_vendor3;
1216         break;
1217     case 0x80000001:
1218         *eax = env->cpuid_version;
1219         *ebx = 0;
1220         *ecx = env->cpuid_ext3_features;
1221         *edx = env->cpuid_ext2_features;
1222
1223         /* The Linux kernel checks for the CMPLegacy bit and
1224          * discards multiple thread information if it is set.
1225          * So dont set it here for Intel to make Linux guests happy.
1226          */
1227         if (env->nr_cores * env->nr_threads > 1) {
1228             uint32_t tebx, tecx, tedx;
1229             get_cpuid_vendor(env, &tebx, &tecx, &tedx);
1230             if (tebx != CPUID_VENDOR_INTEL_1 ||
1231                 tedx != CPUID_VENDOR_INTEL_2 ||
1232                 tecx != CPUID_VENDOR_INTEL_3) {
1233                 *ecx |= 1 << 1;    /* CmpLegacy bit */
1234             }
1235         }
1236         break;
1237     case 0x80000002:
1238     case 0x80000003:
1239     case 0x80000004:
1240         *eax = env->cpuid_model[(index - 0x80000002) * 4 + 0];
1241         *ebx = env->cpuid_model[(index - 0x80000002) * 4 + 1];
1242         *ecx = env->cpuid_model[(index - 0x80000002) * 4 + 2];
1243         *edx = env->cpuid_model[(index - 0x80000002) * 4 + 3];
1244         break;
1245     case 0x80000005:
1246         /* cache info (L1 cache) */
1247         *eax = 0x01ff01ff;
1248         *ebx = 0x01ff01ff;
1249         *ecx = 0x40020140;
1250         *edx = 0x40020140;
1251         break;
1252     case 0x80000006:
1253         /* cache info (L2 cache) */
1254         *eax = 0;
1255         *ebx = 0x42004200;
1256         *ecx = 0x02008140;
1257         *edx = 0;
1258         break;
1259     case 0x80000008:
1260         /* virtual & phys address size in low 2 bytes. */
1261 /* XXX: This value must match the one used in the MMU code. */
1262         if (env->cpuid_ext2_features & CPUID_EXT2_LM) {
1263             /* 64 bit processor */
1264 /* XXX: The physical address space is limited to 42 bits in exec.c. */
1265             *eax = 0x00003028;  /* 48 bits virtual, 40 bits physical */
1266         } else {
1267             if (env->cpuid_features & CPUID_PSE36)
1268                 *eax = 0x00000024; /* 36 bits physical */
1269             else
1270                 *eax = 0x00000020; /* 32 bits physical */
1271         }
1272         *ebx = 0;
1273         *ecx = 0;
1274         *edx = 0;
1275         if (env->nr_cores * env->nr_threads > 1) {
1276             *ecx |= (env->nr_cores * env->nr_threads) - 1;
1277         }
1278         break;
1279     case 0x8000000A:
1280         if (env->cpuid_ext3_features & CPUID_EXT3_SVM) {
1281                 *eax = 0x00000001; /* SVM Revision */
1282                 *ebx = 0x00000010; /* nr of ASIDs */
1283                 *ecx = 0;
1284                 *edx = env->cpuid_svm_features; /* optional features */
1285         } else {
1286                 *eax = 0;
1287                 *ebx = 0;
1288                 *ecx = 0;
1289                 *edx = 0;
1290         }
1291         break;
1292     case 0xC0000000:
1293         *eax = env->cpuid_xlevel2;
1294         *ebx = 0;
1295         *ecx = 0;
1296         *edx = 0;
1297         break;
1298     case 0xC0000001:
1299         /* Support for VIA CPU's CPUID instruction */
1300         *eax = env->cpuid_version;
1301         *ebx = 0;
1302         *ecx = 0;
1303         *edx = env->cpuid_ext4_features;
1304         break;
1305     case 0xC0000002:
1306     case 0xC0000003:
1307     case 0xC0000004:
1308         /* Reserved for the future, and now filled with zero */
1309         *eax = 0;
1310         *ebx = 0;
1311         *ecx = 0;
1312         *edx = 0;
1313         break;
1314     default:
1315         /* reserved values: zero */
1316         *eax = 0;
1317         *ebx = 0;
1318         *ecx = 0;
1319         *edx = 0;
1320         break;
1321     }
1322 }