Annotation of qemu/target-i386/cpuid.c, revision 1.1.1.4

1.1       root        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[] = {
1.1.1.3   root       76:     "kvmclock", "kvm_nopiodelay", "kvm_mmu", "kvmclock", "kvm_asyncpf", NULL, NULL, NULL,
1.1       root       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: 
1.1.1.2   root       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: 
1.1       root       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: 
1.1.1.2   root      106: void host_cpuid(uint32_t function, uint32_t count,
                    107:                 uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx)
1.1       root      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
1.1.1.3   root      185:  * *pval and return true, otherwise return false
1.1       root      186:  */
1.1.1.3   root      187: static bool lookup_feature(uint32_t *pval, const char *s, const char *e,
                    188:                            const char **featureset)
1.1       root      189: {
                    190:     uint32_t mask;
                    191:     const char **ppc;
1.1.1.3   root      192:     bool found = false;
1.1       root      193: 
1.1.1.3   root      194:     for (mask = 1, ppc = featureset; mask; mask <<= 1, ++ppc) {
1.1       root      195:         if (*ppc && !altcmp(s, e, *ppc)) {
                    196:             *pval |= mask;
1.1.1.3   root      197:             found = true;
1.1       root      198:         }
1.1.1.3   root      199:     }
                    200:     return found;
1.1       root      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,
1.1.1.2   root      207:                                     uint32_t *kvm_features,
                    208:                                     uint32_t *svm_features)
1.1       root      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) &&
1.1.1.2   root      214:         !lookup_feature(kvm_features, flagname, NULL, kvm_feature_name) &&
                    215:         !lookup_feature(svm_features, flagname, NULL, svm_feature_name))
1.1       root      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;
1.1.1.4 ! root      227:     int tsc_khz;
1.1.1.2   root      228:     uint32_t features, ext_features, ext2_features, ext3_features;
                    229:     uint32_t kvm_features, svm_features;
1.1       root      230:     uint32_t xlevel;
                    231:     char model_id[48];
                    232:     int vendor_override;
                    233:     uint32_t flags;
1.1.1.3   root      234:     /* Store the results of Centaur's CPUID instructions */
                    235:     uint32_t ext4_features;
                    236:     uint32_t xlevel2;
1.1       root      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)
1.1.1.2   root      275: #define TCG_SVM_FEATURES 0
1.1       root      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,
1.1.1.2   root      328:         .svm_features = CPUID_SVM_NPT | CPUID_SVM_LBRV,
1.1       root      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: 
1.1.1.3   root      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:     }
1.1.1.2   root      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: 
1.1       root      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);
1.1.1.2   root      588:     for (rv = 0, i = 0; i < ARRAY_SIZE(ft); ++i)
1.1       root      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: 
1.1.1.4 ! root      603:     char *s = g_strdup(cpu_model);
1.1       root      604:     char *featurestr, *name = strtok(s, ",");
1.1.1.2   root      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;
1.1       root      613:     uint32_t numvalue;
                    614: 
                    615:     for (def = x86_defs; def; def = def->next)
1.1.1.4 ! root      616:         if (name && !strcmp(name, def->name))
1.1       root      617:             break;
1.1.1.4 ! root      618:     if (kvm_enabled() && name && strcmp(name, "host") == 0) {
1.1       root      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,
1.1.1.2   root      630:         &plus_kvm_features, &plus_svm_features);
1.1       root      631: 
                    632:     featurestr = strtok(NULL, ",");
                    633: 
                    634:     while (featurestr) {
                    635:         char *val;
                    636:         if (featurestr[0] == '+') {
1.1.1.2   root      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);
1.1       root      641:         } else if (featurestr[0] == '-') {
1.1.1.2   root      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);
1.1       root      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);
1.1.1.4 ! root      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;
1.1       root      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;
1.1.1.2   root      738:     x86_cpu_def->svm_features |= plus_svm_features;
1.1       root      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;
1.1.1.2   root      744:     x86_cpu_def->svm_features &= ~minus_svm_features;
1.1       root      745:     if (check_cpuid) {
                    746:         if (check_features_against_host(x86_cpu_def) && enforce_cpuid)
                    747:             goto error;
                    748:     }
1.1.1.4 ! root      749:     g_free(s);
1.1       root      750:     return 0;
                    751: 
                    752: error:
1.1.1.4 ! root      753:     g_free(s);
1.1       root      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:  */
1.1.1.2   root      793: void x86_cpu_list(FILE *f, fprintf_function cpu_fprintf, const char *optarg)
1.1       root      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: 
1.1.1.2   root      857:     memset(def, 0, sizeof(*def));
                    858: 
1.1       root      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;
1.1.1.2   root      884:     env->cpuid_svm_features = def->svm_features;
1.1.1.3   root      885:     env->cpuid_ext4_features = def->ext4_features;
                    886:     env->cpuid_xlevel2 = def->xlevel2;
1.1.1.4 ! root      887:     env->tsc_khz = def->tsc_khz;
1.1       root      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;
1.1.1.2   root      897:         env->cpuid_svm_features &= TCG_SVM_FEATURES;
1.1       root      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")) {
1.1.1.4 ! root      972:         g_free((void *)def->name);
        !           973:         def->name = g_strdup(str);
1.1       root      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: {
1.1.1.4 ! root     1013:     x86_def_t *def = g_malloc0(sizeof (x86_def_t));
1.1       root     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)
1.1.1.2   root     1041:     qemu_opts_foreach(qemu_find_opts("cpudef"), cpudef_register, NULL, 0);
1.1       root     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) {
1.1.1.3   root     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:         }
1.1       root     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;
1.1.1.3   root     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;
1.1       root     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()) {
1.1.1.3   root     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);
1.1       root     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:
1.1.1.2   root     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:        }
1.1       root     1291:         break;
1.1.1.3   root     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;
1.1       root     1314:     default:
                   1315:         /* reserved values: zero */
                   1316:         *eax = 0;
                   1317:         *ebx = 0;
                   1318:         *ecx = 0;
                   1319:         *edx = 0;
                   1320:         break;
                   1321:     }
                   1322: }

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