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/*
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 *  i386 CPUID helper functions
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 *
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 *  Copyright (c) 2003 Fabrice Bellard
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
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 */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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#include "cpu.h"
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#include "kvm.h"
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#include "qemu-option.h"
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#include "qemu-config.h"
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/* feature flags taken from "Intel Processor Identification and the CPUID
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 * Instruction" and AMD's "CPUID Specification".  In cases of disagreement
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 * between feature naming conventions, aliases may be added.
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 */
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static const char *feature_name[] = {
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    "fpu", "vme", "de", "pse",
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    "tsc", "msr", "pae", "mce",
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    "cx8", "apic", NULL, "sep",
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    "mtrr", "pge", "mca", "cmov",
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    "pat", "pse36", "pn" /* Intel psn */, "clflush" /* Intel clfsh */,
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    NULL, "ds" /* Intel dts */, "acpi", "mmx",
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    "fxsr", "sse", "sse2", "ss",
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    "ht" /* Intel htt */, "tm", "ia64", "pbe",
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};
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static const char *ext_feature_name[] = {
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    "pni|sse3" /* Intel,AMD sse3 */, "pclmuldq", "dtes64", "monitor",
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    "ds_cpl", "vmx", "smx", "est",
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    "tm2", "ssse3", "cid", NULL,
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    "fma", "cx16", "xtpr", "pdcm",
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    NULL, NULL, "dca", "sse4.1|sse4_1",
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    "sse4.2|sse4_2", "x2apic", "movbe", "popcnt",
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    NULL, "aes", "xsave", "osxsave",
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    "avx", NULL, NULL, "hypervisor",
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};
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static const char *ext2_feature_name[] = {
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    "fpu", "vme", "de", "pse",
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    "tsc", "msr", "pae", "mce",
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    "cx8" /* AMD CMPXCHG8B */, "apic", NULL, "syscall",
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    "mtrr", "pge", "mca", "cmov",
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    "pat", "pse36", NULL, NULL /* Linux mp */,
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    "nx" /* Intel xd */, NULL, "mmxext", "mmx",
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    "fxsr", "fxsr_opt" /* AMD ffxsr */, "pdpe1gb" /* AMD Page1GB */, "rdtscp",
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    NULL, "lm" /* Intel 64 */, "3dnowext", "3dnow",
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};
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static const char *ext3_feature_name[] = {
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    "lahf_lm" /* AMD LahfSahf */, "cmp_legacy", "svm", "extapic" /* AMD ExtApicSpace */,
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    "cr8legacy" /* AMD AltMovCr8 */, "abm", "sse4a", "misalignsse",
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    "3dnowprefetch", "osvw", "ibs", "xop",
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    "skinit", "wdt", NULL, NULL,
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    "fma4", NULL, "cvt16", "nodeid_msr",
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    NULL, NULL, NULL, NULL,
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    NULL, NULL, NULL, NULL,
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    NULL, NULL, NULL, NULL,
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};
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static const char *kvm_feature_name[] = {
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    "kvmclock", "kvm_nopiodelay", "kvm_mmu", NULL, NULL, NULL, NULL, NULL,
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    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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};
81

    
82
/* collects per-function cpuid data
83
 */
84
typedef struct model_features_t {
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    uint32_t *guest_feat;
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    uint32_t *host_feat;
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    uint32_t check_feat;
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    const char **flag_names;
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    uint32_t cpuid;
90
    } model_features_t;
91

    
92
int check_cpuid = 0;
93
int enforce_cpuid = 0;
94

    
95
static void host_cpuid(uint32_t function, uint32_t count,
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                       uint32_t *eax, uint32_t *ebx,
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                       uint32_t *ecx, uint32_t *edx)
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{
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#if defined(CONFIG_KVM)
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    uint32_t vec[4];
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#ifdef __x86_64__
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    asm volatile("cpuid"
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                 : "=a"(vec[0]), "=b"(vec[1]),
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                   "=c"(vec[2]), "=d"(vec[3])
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                 : "0"(function), "c"(count) : "cc");
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#else
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    asm volatile("pusha \n\t"
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                 "cpuid \n\t"
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                 "mov %%eax, 0(%2) \n\t"
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                 "mov %%ebx, 4(%2) \n\t"
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                 "mov %%ecx, 8(%2) \n\t"
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                 "mov %%edx, 12(%2) \n\t"
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                 "popa"
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                 : : "a"(function), "c"(count), "S"(vec)
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                 : "memory", "cc");
117
#endif
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    if (eax)
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        *eax = vec[0];
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    if (ebx)
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        *ebx = vec[1];
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    if (ecx)
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        *ecx = vec[2];
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    if (edx)
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        *edx = vec[3];
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#endif
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}
129

    
130
#define iswhite(c) ((c) && ((c) <= ' ' || '~' < (c)))
131

    
132
/* general substring compare of *[s1..e1) and *[s2..e2).  sx is start of
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 * a substring.  ex if !NULL points to the first char after a substring,
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 * otherwise the string is assumed to sized by a terminating nul.
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 * Return lexical ordering of *s1:*s2.
136
 */
137
static int sstrcmp(const char *s1, const char *e1, const char *s2,
138
    const char *e2)
139
{
140
    for (;;) {
141
        if (!*s1 || !*s2 || *s1 != *s2)
142
            return (*s1 - *s2);
143
        ++s1, ++s2;
144
        if (s1 == e1 && s2 == e2)
145
            return (0);
146
        else if (s1 == e1)
147
            return (*s2);
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        else if (s2 == e2)
149
            return (*s1);
150
    }
151
}
152

    
153
/* compare *[s..e) to *altstr.  *altstr may be a simple string or multiple
154
 * '|' delimited (possibly empty) strings in which case search for a match
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 * within the alternatives proceeds left to right.  Return 0 for success,
156
 * non-zero otherwise.
157
 */
158
static int altcmp(const char *s, const char *e, const char *altstr)
159
{
160
    const char *p, *q;
161

    
162
    for (q = p = altstr; ; ) {
163
        while (*p && *p != '|')
164
            ++p;
165
        if ((q == p && !*s) || (q != p && !sstrcmp(s, e, q, p)))
166
            return (0);
167
        if (!*p)
168
            return (1);
169
        else
170
            q = ++p;
171
    }
172
}
173

    
174
/* search featureset for flag *[s..e), if found set corresponding bit in
175
 * *pval and return success, otherwise return zero
176
 */
177
static int lookup_feature(uint32_t *pval, const char *s, const char *e,
178
    const char **featureset)
179
{
180
    uint32_t mask;
181
    const char **ppc;
182

    
183
    for (mask = 1, ppc = featureset; mask; mask <<= 1, ++ppc)
184
        if (*ppc && !altcmp(s, e, *ppc)) {
185
            *pval |= mask;
186
            break;
187
        }
188
    return (mask ? 1 : 0);
189
}
190

    
191
static void add_flagname_to_bitmaps(const char *flagname, uint32_t *features,
192
                                    uint32_t *ext_features,
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                                    uint32_t *ext2_features,
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                                    uint32_t *ext3_features,
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                                    uint32_t *kvm_features)
196
{
197
    if (!lookup_feature(features, flagname, NULL, feature_name) &&
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        !lookup_feature(ext_features, flagname, NULL, ext_feature_name) &&
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        !lookup_feature(ext2_features, flagname, NULL, ext2_feature_name) &&
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        !lookup_feature(ext3_features, flagname, NULL, ext3_feature_name) &&
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        !lookup_feature(kvm_features, flagname, NULL, kvm_feature_name))
202
            fprintf(stderr, "CPU feature %s not found\n", flagname);
203
}
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205
typedef struct x86_def_t {
206
    struct x86_def_t *next;
207
    const char *name;
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    uint32_t level;
209
    uint32_t vendor1, vendor2, vendor3;
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    int family;
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    int model;
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    int stepping;
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    uint32_t features, ext_features, ext2_features, ext3_features, kvm_features;
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    uint32_t xlevel;
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    char model_id[48];
216
    int vendor_override;
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    uint32_t flags;
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} x86_def_t;
219

    
220
#define I486_FEATURES (CPUID_FP87 | CPUID_VME | CPUID_PSE)
221
#define PENTIUM_FEATURES (I486_FEATURES | CPUID_DE | CPUID_TSC | \
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          CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_MMX | CPUID_APIC)
223
#define PENTIUM2_FEATURES (PENTIUM_FEATURES | CPUID_PAE | CPUID_SEP | \
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          CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | CPUID_PAT | \
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          CPUID_PSE36 | CPUID_FXSR)
226
#define PENTIUM3_FEATURES (PENTIUM2_FEATURES | CPUID_SSE)
227
#define PPRO_FEATURES (CPUID_FP87 | CPUID_DE | CPUID_PSE | CPUID_TSC | \
228
          CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_PGE | CPUID_CMOV | \
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          CPUID_PAT | CPUID_FXSR | CPUID_MMX | CPUID_SSE | CPUID_SSE2 | \
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          CPUID_PAE | CPUID_SEP | CPUID_APIC)
231
#define EXT2_FEATURE_MASK 0x0183F3FF
232

    
233
#define TCG_FEATURES (CPUID_FP87 | CPUID_PSE | CPUID_TSC | CPUID_MSR | \
234
          CPUID_PAE | CPUID_MCE | CPUID_CX8 | CPUID_APIC | CPUID_SEP | \
235
          CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | CPUID_PAT | \
236
          CPUID_PSE36 | CPUID_CLFLUSH | CPUID_ACPI | CPUID_MMX | \
237
          CPUID_FXSR | CPUID_SSE | CPUID_SSE2 | CPUID_SS)
238
          /* partly implemented:
239
          CPUID_MTRR, CPUID_MCA, CPUID_CLFLUSH (needed for Win64)
240
          CPUID_PSE36 (needed for Solaris) */
241
          /* missing:
242
          CPUID_VME, CPUID_DTS, CPUID_SS, CPUID_HT, CPUID_TM, CPUID_PBE */
243
#define TCG_EXT_FEATURES (CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | \
244
          CPUID_EXT_CX16 | CPUID_EXT_POPCNT | CPUID_EXT_XSAVE | \
245
          CPUID_EXT_HYPERVISOR)
246
          /* missing:
247
          CPUID_EXT_DTES64, CPUID_EXT_DSCPL, CPUID_EXT_VMX, CPUID_EXT_EST,
248
          CPUID_EXT_TM2, CPUID_EXT_XTPR, CPUID_EXT_PDCM */
249
#define TCG_EXT2_FEATURES ((TCG_FEATURES & EXT2_FEATURE_MASK) | \
250
          CPUID_EXT2_NX | CPUID_EXT2_MMXEXT | CPUID_EXT2_RDTSCP | \
251
          CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT)
252
          /* missing:
253
          CPUID_EXT2_PDPE1GB */
254
#define TCG_EXT3_FEATURES (CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM | \
255
          CPUID_EXT3_CR8LEG | CPUID_EXT3_ABM | CPUID_EXT3_SSE4A)
256

    
257
/* maintains list of cpu model definitions
258
 */
259
static x86_def_t *x86_defs = {NULL};
260

    
261
/* built-in cpu model definitions (deprecated)
262
 */
263
static x86_def_t builtin_x86_defs[] = {
264
    {
265
        .name = "qemu64",
266
        .level = 4,
267
        .vendor1 = CPUID_VENDOR_AMD_1,
268
        .vendor2 = CPUID_VENDOR_AMD_2,
269
        .vendor3 = CPUID_VENDOR_AMD_3,
270
        .family = 6,
271
        .model = 2,
272
        .stepping = 3,
273
        .features = PPRO_FEATURES |
274
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
275
            CPUID_PSE36,
276
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16 | CPUID_EXT_POPCNT,
277
        .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
278
            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
279
        .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
280
            CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
281
        .xlevel = 0x8000000A,
282
        .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
283
    },
284
    {
285
        .name = "phenom",
286
        .level = 5,
287
        .vendor1 = CPUID_VENDOR_AMD_1,
288
        .vendor2 = CPUID_VENDOR_AMD_2,
289
        .vendor3 = CPUID_VENDOR_AMD_3,
290
        .family = 16,
291
        .model = 2,
292
        .stepping = 3,
293
        .features = PPRO_FEATURES |
294
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
295
            CPUID_PSE36 | CPUID_VME | CPUID_HT,
296
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_CX16 |
297
            CPUID_EXT_POPCNT,
298
        .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
299
            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX |
300
            CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT | CPUID_EXT2_MMXEXT |
301
            CPUID_EXT2_FFXSR | CPUID_EXT2_PDPE1GB | CPUID_EXT2_RDTSCP,
302
        /* Missing: CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
303
                    CPUID_EXT3_CR8LEG,
304
                    CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
305
                    CPUID_EXT3_OSVW, CPUID_EXT3_IBS */
306
        .ext3_features = CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
307
            CPUID_EXT3_ABM | CPUID_EXT3_SSE4A,
308
        .xlevel = 0x8000001A,
309
        .model_id = "AMD Phenom(tm) 9550 Quad-Core Processor"
310
    },
311
    {
312
        .name = "core2duo",
313
        .level = 10,
314
        .family = 6,
315
        .model = 15,
316
        .stepping = 11,
317
        .features = PPRO_FEATURES |
318
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
319
            CPUID_PSE36 | CPUID_VME | CPUID_DTS | CPUID_ACPI | CPUID_SS |
320
            CPUID_HT | CPUID_TM | CPUID_PBE,
321
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
322
            CPUID_EXT_DTES64 | CPUID_EXT_DSCPL | CPUID_EXT_VMX | CPUID_EXT_EST |
323
            CPUID_EXT_TM2 | CPUID_EXT_CX16 | CPUID_EXT_XTPR | CPUID_EXT_PDCM,
324
        .ext2_features = CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
325
        .ext3_features = CPUID_EXT3_LAHF_LM,
326
        .xlevel = 0x80000008,
327
        .model_id = "Intel(R) Core(TM)2 Duo CPU     T7700  @ 2.40GHz",
328
    },
329
    {
330
        .name = "kvm64",
331
        .level = 5,
332
        .vendor1 = CPUID_VENDOR_INTEL_1,
333
        .vendor2 = CPUID_VENDOR_INTEL_2,
334
        .vendor3 = CPUID_VENDOR_INTEL_3,
335
        .family = 15,
336
        .model = 6,
337
        .stepping = 1,
338
        /* Missing: CPUID_VME, CPUID_HT */
339
        .features = PPRO_FEATURES |
340
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |
341
            CPUID_PSE36,
342
        /* Missing: CPUID_EXT_POPCNT, CPUID_EXT_MONITOR */
343
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_CX16,
344
        /* Missing: CPUID_EXT2_PDPE1GB, CPUID_EXT2_RDTSCP */
345
        .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) |
346
            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
347
        /* Missing: CPUID_EXT3_LAHF_LM, CPUID_EXT3_CMP_LEG, CPUID_EXT3_EXTAPIC,
348
                    CPUID_EXT3_CR8LEG, CPUID_EXT3_ABM, CPUID_EXT3_SSE4A,
349
                    CPUID_EXT3_MISALIGNSSE, CPUID_EXT3_3DNOWPREFETCH,
350
                    CPUID_EXT3_OSVW, CPUID_EXT3_IBS, CPUID_EXT3_SVM */
351
        .ext3_features = 0,
352
        .xlevel = 0x80000008,
353
        .model_id = "Common KVM processor"
354
    },
355
    {
356
        .name = "qemu32",
357
        .level = 4,
358
        .family = 6,
359
        .model = 3,
360
        .stepping = 3,
361
        .features = PPRO_FEATURES,
362
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_POPCNT,
363
        .xlevel = 0x80000004,
364
        .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
365
    },
366
    {
367
        .name = "coreduo",
368
        .level = 10,
369
        .family = 6,
370
        .model = 14,
371
        .stepping = 8,
372
        .features = PPRO_FEATURES | CPUID_VME |
373
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_DTS | CPUID_ACPI |
374
            CPUID_SS | CPUID_HT | CPUID_TM | CPUID_PBE,
375
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_VMX |
376
            CPUID_EXT_EST | CPUID_EXT_TM2 | CPUID_EXT_XTPR | CPUID_EXT_PDCM,
377
        .ext2_features = CPUID_EXT2_NX,
378
        .xlevel = 0x80000008,
379
        .model_id = "Genuine Intel(R) CPU           T2600  @ 2.16GHz",
380
    },
381
    {
382
        .name = "486",
383
        .level = 1,
384
        .family = 4,
385
        .model = 0,
386
        .stepping = 0,
387
        .features = I486_FEATURES,
388
        .xlevel = 0,
389
    },
390
    {
391
        .name = "pentium",
392
        .level = 1,
393
        .family = 5,
394
        .model = 4,
395
        .stepping = 3,
396
        .features = PENTIUM_FEATURES,
397
        .xlevel = 0,
398
    },
399
    {
400
        .name = "pentium2",
401
        .level = 2,
402
        .family = 6,
403
        .model = 5,
404
        .stepping = 2,
405
        .features = PENTIUM2_FEATURES,
406
        .xlevel = 0,
407
    },
408
    {
409
        .name = "pentium3",
410
        .level = 2,
411
        .family = 6,
412
        .model = 7,
413
        .stepping = 3,
414
        .features = PENTIUM3_FEATURES,
415
        .xlevel = 0,
416
    },
417
    {
418
        .name = "athlon",
419
        .level = 2,
420
        .vendor1 = CPUID_VENDOR_AMD_1,
421
        .vendor2 = CPUID_VENDOR_AMD_2,
422
        .vendor3 = CPUID_VENDOR_AMD_3,
423
        .family = 6,
424
        .model = 2,
425
        .stepping = 3,
426
        .features = PPRO_FEATURES | CPUID_PSE36 | CPUID_VME | CPUID_MTRR | CPUID_MCA,
427
        .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) | CPUID_EXT2_MMXEXT | CPUID_EXT2_3DNOW | CPUID_EXT2_3DNOWEXT,
428
        .xlevel = 0x80000008,
429
        /* XXX: put another string ? */
430
        .model_id = "QEMU Virtual CPU version " QEMU_VERSION,
431
    },
432
    {
433
        .name = "n270",
434
        /* original is on level 10 */
435
        .level = 5,
436
        .family = 6,
437
        .model = 28,
438
        .stepping = 2,
439
        .features = PPRO_FEATURES |
440
            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA | CPUID_VME | CPUID_DTS |
441
            CPUID_ACPI | CPUID_SS | CPUID_HT | CPUID_TM | CPUID_PBE,
442
            /* Some CPUs got no CPUID_SEP */
443
        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR | CPUID_EXT_SSSE3 |
444
            CPUID_EXT_DSCPL | CPUID_EXT_EST | CPUID_EXT_TM2 | CPUID_EXT_XTPR,
445
        .ext2_features = (PPRO_FEATURES & EXT2_FEATURE_MASK) | CPUID_EXT2_NX,
446
        .ext3_features = CPUID_EXT3_LAHF_LM,
447
        .xlevel = 0x8000000A,
448
        .model_id = "Intel(R) Atom(TM) CPU N270   @ 1.60GHz",
449
    },
450
};
451

    
452
static int cpu_x86_fill_model_id(char *str)
453
{
454
    uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
455
    int i;
456

    
457
    for (i = 0; i < 3; i++) {
458
        host_cpuid(0x80000002 + i, 0, &eax, &ebx, &ecx, &edx);
459
        memcpy(str + i * 16 +  0, &eax, 4);
460
        memcpy(str + i * 16 +  4, &ebx, 4);
461
        memcpy(str + i * 16 +  8, &ecx, 4);
462
        memcpy(str + i * 16 + 12, &edx, 4);
463
    }
464
    return 0;
465
}
466

    
467
static int cpu_x86_fill_host(x86_def_t *x86_cpu_def)
468
{
469
    uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
470

    
471
    x86_cpu_def->name = "host";
472
    host_cpuid(0x0, 0, &eax, &ebx, &ecx, &edx);
473
    x86_cpu_def->level = eax;
474
    x86_cpu_def->vendor1 = ebx;
475
    x86_cpu_def->vendor2 = edx;
476
    x86_cpu_def->vendor3 = ecx;
477

    
478
    host_cpuid(0x1, 0, &eax, &ebx, &ecx, &edx);
479
    x86_cpu_def->family = ((eax >> 8) & 0x0F) + ((eax >> 20) & 0xFF);
480
    x86_cpu_def->model = ((eax >> 4) & 0x0F) | ((eax & 0xF0000) >> 12);
481
    x86_cpu_def->stepping = eax & 0x0F;
482
    x86_cpu_def->ext_features = ecx;
483
    x86_cpu_def->features = edx;
484

    
485
    host_cpuid(0x80000000, 0, &eax, &ebx, &ecx, &edx);
486
    x86_cpu_def->xlevel = eax;
487

    
488
    host_cpuid(0x80000001, 0, &eax, &ebx, &ecx, &edx);
489
    x86_cpu_def->ext2_features = edx;
490
    x86_cpu_def->ext3_features = ecx;
491
    cpu_x86_fill_model_id(x86_cpu_def->model_id);
492
    x86_cpu_def->vendor_override = 0;
493

    
494
    return 0;
495
}
496

    
497
static int unavailable_host_feature(struct model_features_t *f, uint32_t mask)
498
{
499
    int i;
500

    
501
    for (i = 0; i < 32; ++i)
502
        if (1 << i & mask) {
503
            fprintf(stderr, "warning: host cpuid %04x_%04x lacks requested"
504
                " flag '%s' [0x%08x]\n",
505
                f->cpuid >> 16, f->cpuid & 0xffff,
506
                f->flag_names[i] ? f->flag_names[i] : "[reserved]", mask);
507
            break;
508
        }
509
    return 0;
510
}
511

    
512
/* best effort attempt to inform user requested cpu flags aren't making
513
 * their way to the guest.  Note: ft[].check_feat ideally should be
514
 * specified via a guest_def field to suppress report of extraneous flags.
515
 */
516
static int check_features_against_host(x86_def_t *guest_def)
517
{
518
    x86_def_t host_def;
519
    uint32_t mask;
520
    int rv, i;
521
    struct model_features_t ft[] = {
522
        {&guest_def->features, &host_def.features,
523
            ~0, feature_name, 0x00000000},
524
        {&guest_def->ext_features, &host_def.ext_features,
525
            ~CPUID_EXT_HYPERVISOR, ext_feature_name, 0x00000001},
526
        {&guest_def->ext2_features, &host_def.ext2_features,
527
            ~PPRO_FEATURES, ext2_feature_name, 0x80000000},
528
        {&guest_def->ext3_features, &host_def.ext3_features,
529
            ~CPUID_EXT3_SVM, ext3_feature_name, 0x80000001}};
530

    
531
    cpu_x86_fill_host(&host_def);
532
    for (rv = 0, i = 0; i < sizeof (ft) / sizeof (ft[0]); ++i)
533
        for (mask = 1; mask; mask <<= 1)
534
            if (ft[i].check_feat & mask && *ft[i].guest_feat & mask &&
535
                !(*ft[i].host_feat & mask)) {
536
                    unavailable_host_feature(&ft[i], mask);
537
                    rv = 1;
538
                }
539
    return rv;
540
}
541

    
542
static int cpu_x86_find_by_name(x86_def_t *x86_cpu_def, const char *cpu_model)
543
{
544
    unsigned int i;
545
    x86_def_t *def;
546

    
547
    char *s = strdup(cpu_model);
548
    char *featurestr, *name = strtok(s, ",");
549
    uint32_t plus_features = 0, plus_ext_features = 0, plus_ext2_features = 0, plus_ext3_features = 0, plus_kvm_features = 0;
550
    uint32_t minus_features = 0, minus_ext_features = 0, minus_ext2_features = 0, minus_ext3_features = 0, minus_kvm_features = 0;
551
    uint32_t numvalue;
552

    
553
    for (def = x86_defs; def; def = def->next)
554
        if (!strcmp(name, def->name))
555
            break;
556
    if (kvm_enabled() && strcmp(name, "host") == 0) {
557
        cpu_x86_fill_host(x86_cpu_def);
558
    } else if (!def) {
559
        goto error;
560
    } else {
561
        memcpy(x86_cpu_def, def, sizeof(*def));
562
    }
563

    
564
    plus_kvm_features = ~0; /* not supported bits will be filtered out later */
565

    
566
    add_flagname_to_bitmaps("hypervisor", &plus_features,
567
        &plus_ext_features, &plus_ext2_features, &plus_ext3_features,
568
        &plus_kvm_features);
569

    
570
    featurestr = strtok(NULL, ",");
571

    
572
    while (featurestr) {
573
        char *val;
574
        if (featurestr[0] == '+') {
575
            add_flagname_to_bitmaps(featurestr + 1, &plus_features, &plus_ext_features, &plus_ext2_features, &plus_ext3_features, &plus_kvm_features);
576
        } else if (featurestr[0] == '-') {
577
            add_flagname_to_bitmaps(featurestr + 1, &minus_features, &minus_ext_features, &minus_ext2_features, &minus_ext3_features, &minus_kvm_features);
578
        } else if ((val = strchr(featurestr, '='))) {
579
            *val = 0; val++;
580
            if (!strcmp(featurestr, "family")) {
581
                char *err;
582
                numvalue = strtoul(val, &err, 0);
583
                if (!*val || *err) {
584
                    fprintf(stderr, "bad numerical value %s\n", val);
585
                    goto error;
586
                }
587
                x86_cpu_def->family = numvalue;
588
            } else if (!strcmp(featurestr, "model")) {
589
                char *err;
590
                numvalue = strtoul(val, &err, 0);
591
                if (!*val || *err || numvalue > 0xff) {
592
                    fprintf(stderr, "bad numerical value %s\n", val);
593
                    goto error;
594
                }
595
                x86_cpu_def->model = numvalue;
596
            } else if (!strcmp(featurestr, "stepping")) {
597
                char *err;
598
                numvalue = strtoul(val, &err, 0);
599
                if (!*val || *err || numvalue > 0xf) {
600
                    fprintf(stderr, "bad numerical value %s\n", val);
601
                    goto error;
602
                }
603
                x86_cpu_def->stepping = numvalue ;
604
            } else if (!strcmp(featurestr, "level")) {
605
                char *err;
606
                numvalue = strtoul(val, &err, 0);
607
                if (!*val || *err) {
608
                    fprintf(stderr, "bad numerical value %s\n", val);
609
                    goto error;
610
                }
611
                x86_cpu_def->level = numvalue;
612
            } else if (!strcmp(featurestr, "xlevel")) {
613
                char *err;
614
                numvalue = strtoul(val, &err, 0);
615
                if (!*val || *err) {
616
                    fprintf(stderr, "bad numerical value %s\n", val);
617
                    goto error;
618
                }
619
                if (numvalue < 0x80000000) {
620
                    numvalue += 0x80000000;
621
                }
622
                x86_cpu_def->xlevel = numvalue;
623
            } else if (!strcmp(featurestr, "vendor")) {
624
                if (strlen(val) != 12) {
625
                    fprintf(stderr, "vendor string must be 12 chars long\n");
626
                    goto error;
627
                }
628
                x86_cpu_def->vendor1 = 0;
629
                x86_cpu_def->vendor2 = 0;
630
                x86_cpu_def->vendor3 = 0;
631
                for(i = 0; i < 4; i++) {
632
                    x86_cpu_def->vendor1 |= ((uint8_t)val[i    ]) << (8 * i);
633
                    x86_cpu_def->vendor2 |= ((uint8_t)val[i + 4]) << (8 * i);
634
                    x86_cpu_def->vendor3 |= ((uint8_t)val[i + 8]) << (8 * i);
635
                }
636
                x86_cpu_def->vendor_override = 1;
637
            } else if (!strcmp(featurestr, "model_id")) {
638
                pstrcpy(x86_cpu_def->model_id, sizeof(x86_cpu_def->model_id),
639
                        val);
640
            } else {
641
                fprintf(stderr, "unrecognized feature %s\n", featurestr);
642
                goto error;
643
            }
644
        } else if (!strcmp(featurestr, "check")) {
645
            check_cpuid = 1;
646
        } else if (!strcmp(featurestr, "enforce")) {
647
            check_cpuid = enforce_cpuid = 1;
648
        } else {
649
            fprintf(stderr, "feature string `%s' not in format (+feature|-feature|feature=xyz)\n", featurestr);
650
            goto error;
651
        }
652
        featurestr = strtok(NULL, ",");
653
    }
654
    x86_cpu_def->features |= plus_features;
655
    x86_cpu_def->ext_features |= plus_ext_features;
656
    x86_cpu_def->ext2_features |= plus_ext2_features;
657
    x86_cpu_def->ext3_features |= plus_ext3_features;
658
    x86_cpu_def->kvm_features |= plus_kvm_features;
659
    x86_cpu_def->features &= ~minus_features;
660
    x86_cpu_def->ext_features &= ~minus_ext_features;
661
    x86_cpu_def->ext2_features &= ~minus_ext2_features;
662
    x86_cpu_def->ext3_features &= ~minus_ext3_features;
663
    x86_cpu_def->kvm_features &= ~minus_kvm_features;
664
    if (check_cpuid) {
665
        if (check_features_against_host(x86_cpu_def) && enforce_cpuid)
666
            goto error;
667
    }
668
    free(s);
669
    return 0;
670

    
671
error:
672
    free(s);
673
    return -1;
674
}
675

    
676
/* generate a composite string into buf of all cpuid names in featureset
677
 * selected by fbits.  indicate truncation at bufsize in the event of overflow.
678
 * if flags, suppress names undefined in featureset.
679
 */
680
static void listflags(char *buf, int bufsize, uint32_t fbits,
681
    const char **featureset, uint32_t flags)
682
{
683
    const char **p = &featureset[31];
684
    char *q, *b, bit;
685
    int nc;
686

    
687
    b = 4 <= bufsize ? buf + (bufsize -= 3) - 1 : NULL;
688
    *buf = '\0';
689
    for (q = buf, bit = 31; fbits && bufsize; --p, fbits &= ~(1 << bit), --bit)
690
        if (fbits & 1 << bit && (*p || !flags)) {
691
            if (*p)
692
                nc = snprintf(q, bufsize, "%s%s", q == buf ? "" : " ", *p);
693
            else
694
                nc = snprintf(q, bufsize, "%s[%d]", q == buf ? "" : " ", bit);
695
            if (bufsize <= nc) {
696
                if (b) {
697
                    memcpy(b, "...", sizeof("..."));
698
                }
699
                return;
700
            }
701
            q += nc;
702
            bufsize -= nc;
703
        }
704
}
705

    
706
/* generate CPU information:
707
 * -?        list model names
708
 * -?model   list model names/IDs
709
 * -?dump    output all model (x86_def_t) data
710
 * -?cpuid   list all recognized cpuid flag names
711
 */
712
void x86_cpu_list (FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
713
                  const char *optarg)
714
{
715
    unsigned char model = !strcmp("?model", optarg);
716
    unsigned char dump = !strcmp("?dump", optarg);
717
    unsigned char cpuid = !strcmp("?cpuid", optarg);
718
    x86_def_t *def;
719
    char buf[256];
720

    
721
    if (cpuid) {
722
        (*cpu_fprintf)(f, "Recognized CPUID flags:\n");
723
        listflags(buf, sizeof (buf), (uint32_t)~0, feature_name, 1);
724
        (*cpu_fprintf)(f, "  f_edx: %s\n", buf);
725
        listflags(buf, sizeof (buf), (uint32_t)~0, ext_feature_name, 1);
726
        (*cpu_fprintf)(f, "  f_ecx: %s\n", buf);
727
        listflags(buf, sizeof (buf), (uint32_t)~0, ext2_feature_name, 1);
728
        (*cpu_fprintf)(f, "  extf_edx: %s\n", buf);
729
        listflags(buf, sizeof (buf), (uint32_t)~0, ext3_feature_name, 1);
730
        (*cpu_fprintf)(f, "  extf_ecx: %s\n", buf);
731
        return;
732
    }
733
    for (def = x86_defs; def; def = def->next) {
734
        snprintf(buf, sizeof (buf), def->flags ? "[%s]": "%s", def->name);
735
        if (model || dump) {
736
            (*cpu_fprintf)(f, "x86 %16s  %-48s\n", buf, def->model_id);
737
        } else {
738
            (*cpu_fprintf)(f, "x86 %16s\n", buf);
739
        }
740
        if (dump) {
741
            memcpy(buf, &def->vendor1, sizeof (def->vendor1));
742
            memcpy(buf + 4, &def->vendor2, sizeof (def->vendor2));
743
            memcpy(buf + 8, &def->vendor3, sizeof (def->vendor3));
744
            buf[12] = '\0';
745
            (*cpu_fprintf)(f,
746
                "  family %d model %d stepping %d level %d xlevel 0x%x"
747
                " vendor \"%s\"\n",
748
                def->family, def->model, def->stepping, def->level,
749
                def->xlevel, buf);
750
            listflags(buf, sizeof (buf), def->features, feature_name, 0);
751
            (*cpu_fprintf)(f, "  feature_edx %08x (%s)\n", def->features,
752
                buf);
753
            listflags(buf, sizeof (buf), def->ext_features, ext_feature_name,
754
                0);
755
            (*cpu_fprintf)(f, "  feature_ecx %08x (%s)\n", def->ext_features,
756
                buf);
757
            listflags(buf, sizeof (buf), def->ext2_features, ext2_feature_name,
758
                0);
759
            (*cpu_fprintf)(f, "  extfeature_edx %08x (%s)\n",
760
                def->ext2_features, buf);
761
            listflags(buf, sizeof (buf), def->ext3_features, ext3_feature_name,
762
                0);
763
            (*cpu_fprintf)(f, "  extfeature_ecx %08x (%s)\n",
764
                def->ext3_features, buf);
765
            (*cpu_fprintf)(f, "\n");
766
        }
767
    }
768
    if (kvm_enabled()) {
769
        (*cpu_fprintf)(f, "x86 %16s\n", "[host]");
770
    }
771
}
772

    
773
int cpu_x86_register (CPUX86State *env, const char *cpu_model)
774
{
775
    x86_def_t def1, *def = &def1;
776

    
777
    if (cpu_x86_find_by_name(def, cpu_model) < 0)
778
        return -1;
779
    if (def->vendor1) {
780
        env->cpuid_vendor1 = def->vendor1;
781
        env->cpuid_vendor2 = def->vendor2;
782
        env->cpuid_vendor3 = def->vendor3;
783
    } else {
784
        env->cpuid_vendor1 = CPUID_VENDOR_INTEL_1;
785
        env->cpuid_vendor2 = CPUID_VENDOR_INTEL_2;
786
        env->cpuid_vendor3 = CPUID_VENDOR_INTEL_3;
787
    }
788
    env->cpuid_vendor_override = def->vendor_override;
789
    env->cpuid_level = def->level;
790
    if (def->family > 0x0f)
791
        env->cpuid_version = 0xf00 | ((def->family - 0x0f) << 20);
792
    else
793
        env->cpuid_version = def->family << 8;
794
    env->cpuid_version |= ((def->model & 0xf) << 4) | ((def->model >> 4) << 16);
795
    env->cpuid_version |= def->stepping;
796
    env->cpuid_features = def->features;
797
    env->pat = 0x0007040600070406ULL;
798
    env->cpuid_ext_features = def->ext_features;
799
    env->cpuid_ext2_features = def->ext2_features;
800
    env->cpuid_ext3_features = def->ext3_features;
801
    env->cpuid_xlevel = def->xlevel;
802
    env->cpuid_kvm_features = def->kvm_features;
803
    if (!kvm_enabled()) {
804
        env->cpuid_features &= TCG_FEATURES;
805
        env->cpuid_ext_features &= TCG_EXT_FEATURES;
806
        env->cpuid_ext2_features &= (TCG_EXT2_FEATURES
807
#ifdef TARGET_X86_64
808
            | CPUID_EXT2_SYSCALL | CPUID_EXT2_LM
809
#endif
810
            );
811
        env->cpuid_ext3_features &= TCG_EXT3_FEATURES;
812
    }
813
    {
814
        const char *model_id = def->model_id;
815
        int c, len, i;
816
        if (!model_id)
817
            model_id = "";
818
        len = strlen(model_id);
819
        for(i = 0; i < 48; i++) {
820
            if (i >= len)
821
                c = '\0';
822
            else
823
                c = (uint8_t)model_id[i];
824
            env->cpuid_model[i >> 2] |= c << (8 * (i & 3));
825
        }
826
    }
827
    return 0;
828
}
829

    
830
#if !defined(CONFIG_USER_ONLY)
831
/* copy vendor id string to 32 bit register, nul pad as needed
832
 */
833
static void cpyid(const char *s, uint32_t *id)
834
{
835
    char *d = (char *)id;
836
    char i;
837

    
838
    for (i = sizeof (*id); i--; )
839
        *d++ = *s ? *s++ : '\0';
840
}
841

    
842
/* interpret radix and convert from string to arbitrary scalar,
843
 * otherwise flag failure
844
 */
845
#define setscalar(pval, str, perr)                      \
846
{                                                       \
847
    char *pend;                                         \
848
    unsigned long ul;                                   \
849
                                                        \
850
    ul = strtoul(str, &pend, 0);                        \
851
    *str && !*pend ? (*pval = ul) : (*perr = 1);        \
852
}
853

    
854
/* map cpuid options to feature bits, otherwise return failure
855
 * (option tags in *str are delimited by whitespace)
856
 */
857
static void setfeatures(uint32_t *pval, const char *str,
858
    const char **featureset, int *perr)
859
{
860
    const char *p, *q;
861

    
862
    for (q = p = str; *p || *q; q = p) {
863
        while (iswhite(*p))
864
            q = ++p;
865
        while (*p && !iswhite(*p))
866
            ++p;
867
        if (!*q && !*p)
868
            return;
869
        if (!lookup_feature(pval, q, p, featureset)) {
870
            fprintf(stderr, "error: feature \"%.*s\" not available in set\n",
871
                (int)(p - q), q);
872
            *perr = 1;
873
            return;
874
        }
875
    }
876
}
877

    
878
/* map config file options to x86_def_t form
879
 */
880
static int cpudef_setfield(const char *name, const char *str, void *opaque)
881
{
882
    x86_def_t *def = opaque;
883
    int err = 0;
884

    
885
    if (!strcmp(name, "name")) {
886
        def->name = strdup(str);
887
    } else if (!strcmp(name, "model_id")) {
888
        strncpy(def->model_id, str, sizeof (def->model_id));
889
    } else if (!strcmp(name, "level")) {
890
        setscalar(&def->level, str, &err)
891
    } else if (!strcmp(name, "vendor")) {
892
        cpyid(&str[0], &def->vendor1);
893
        cpyid(&str[4], &def->vendor2);
894
        cpyid(&str[8], &def->vendor3);
895
    } else if (!strcmp(name, "family")) {
896
        setscalar(&def->family, str, &err)
897
    } else if (!strcmp(name, "model")) {
898
        setscalar(&def->model, str, &err)
899
    } else if (!strcmp(name, "stepping")) {
900
        setscalar(&def->stepping, str, &err)
901
    } else if (!strcmp(name, "feature_edx")) {
902
        setfeatures(&def->features, str, feature_name, &err);
903
    } else if (!strcmp(name, "feature_ecx")) {
904
        setfeatures(&def->ext_features, str, ext_feature_name, &err);
905
    } else if (!strcmp(name, "extfeature_edx")) {
906
        setfeatures(&def->ext2_features, str, ext2_feature_name, &err);
907
    } else if (!strcmp(name, "extfeature_ecx")) {
908
        setfeatures(&def->ext3_features, str, ext3_feature_name, &err);
909
    } else if (!strcmp(name, "xlevel")) {
910
        setscalar(&def->xlevel, str, &err)
911
    } else {
912
        fprintf(stderr, "error: unknown option [%s = %s]\n", name, str);
913
        return (1);
914
    }
915
    if (err) {
916
        fprintf(stderr, "error: bad option value [%s = %s]\n", name, str);
917
        return (1);
918
    }
919
    return (0);
920
}
921

    
922
/* register config file entry as x86_def_t
923
 */
924
static int cpudef_register(QemuOpts *opts, void *opaque)
925
{
926
    x86_def_t *def = qemu_mallocz(sizeof (x86_def_t));
927

    
928
    qemu_opt_foreach(opts, cpudef_setfield, def, 1);
929
    def->next = x86_defs;
930
    x86_defs = def;
931
    return (0);
932
}
933
#endif /* !CONFIG_USER_ONLY */
934

    
935
/* register "cpudef" models defined in configuration file.  Here we first
936
 * preload any built-in definitions
937
 */
938
void x86_cpudef_setup(void)
939
{
940
    int i;
941

    
942
    for (i = 0; i < ARRAY_SIZE(builtin_x86_defs); ++i) {
943
        builtin_x86_defs[i].next = x86_defs;
944
        builtin_x86_defs[i].flags = 1;
945
        x86_defs = &builtin_x86_defs[i];
946
    }
947
#if !defined(CONFIG_USER_ONLY)
948
    qemu_opts_foreach(&qemu_cpudef_opts, cpudef_register, NULL, 0);
949
#endif
950
}
951

    
952
static void get_cpuid_vendor(CPUX86State *env, uint32_t *ebx,
953
                             uint32_t *ecx, uint32_t *edx)
954
{
955
    *ebx = env->cpuid_vendor1;
956
    *edx = env->cpuid_vendor2;
957
    *ecx = env->cpuid_vendor3;
958

    
959
    /* sysenter isn't supported on compatibility mode on AMD, syscall
960
     * isn't supported in compatibility mode on Intel.
961
     * Normally we advertise the actual cpu vendor, but you can override
962
     * this if you want to use KVM's sysenter/syscall emulation
963
     * in compatibility mode and when doing cross vendor migration
964
     */
965
    if (kvm_enabled() && env->cpuid_vendor_override) {
966
        host_cpuid(0, 0, NULL, ebx, ecx, edx);
967
    }
968
}
969

    
970
void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
971
                   uint32_t *eax, uint32_t *ebx,
972
                   uint32_t *ecx, uint32_t *edx)
973
{
974
    /* test if maximum index reached */
975
    if (index & 0x80000000) {
976
        if (index > env->cpuid_xlevel)
977
            index = env->cpuid_level;
978
    } else {
979
        if (index > env->cpuid_level)
980
            index = env->cpuid_level;
981
    }
982

    
983
    switch(index) {
984
    case 0:
985
        *eax = env->cpuid_level;
986
        get_cpuid_vendor(env, ebx, ecx, edx);
987
        break;
988
    case 1:
989
        *eax = env->cpuid_version;
990
        *ebx = (env->cpuid_apic_id << 24) | 8 << 8; /* CLFLUSH size in quad words, Linux wants it. */
991
        *ecx = env->cpuid_ext_features;
992
        *edx = env->cpuid_features;
993
        if (env->nr_cores * env->nr_threads > 1) {
994
            *ebx |= (env->nr_cores * env->nr_threads) << 16;
995
            *edx |= 1 << 28;    /* HTT bit */
996
        }
997
        break;
998
    case 2:
999
        /* cache info: needed for Pentium Pro compatibility */
1000
        *eax = 1;
1001
        *ebx = 0;
1002
        *ecx = 0;
1003
        *edx = 0x2c307d;
1004
        break;
1005
    case 4:
1006
        /* cache info: needed for Core compatibility */
1007
        if (env->nr_cores > 1) {
1008
            *eax = (env->nr_cores - 1) << 26;
1009
        } else {
1010
            *eax = 0;
1011
        }
1012
        switch (count) {
1013
            case 0: /* L1 dcache info */
1014
                *eax |= 0x0000121;
1015
                *ebx = 0x1c0003f;
1016
                *ecx = 0x000003f;
1017
                *edx = 0x0000001;
1018
                break;
1019
            case 1: /* L1 icache info */
1020
                *eax |= 0x0000122;
1021
                *ebx = 0x1c0003f;
1022
                *ecx = 0x000003f;
1023
                *edx = 0x0000001;
1024
                break;
1025
            case 2: /* L2 cache info */
1026
                *eax |= 0x0000143;
1027
                if (env->nr_threads > 1) {
1028
                    *eax |= (env->nr_threads - 1) << 14;
1029
                }
1030
                *ebx = 0x3c0003f;
1031
                *ecx = 0x0000fff;
1032
                *edx = 0x0000001;
1033
                break;
1034
            default: /* end of info */
1035
                *eax = 0;
1036
                *ebx = 0;
1037
                *ecx = 0;
1038
                *edx = 0;
1039
                break;
1040
        }
1041
        break;
1042
    case 5:
1043
        /* mwait info: needed for Core compatibility */
1044
        *eax = 0; /* Smallest monitor-line size in bytes */
1045
        *ebx = 0; /* Largest monitor-line size in bytes */
1046
        *ecx = CPUID_MWAIT_EMX | CPUID_MWAIT_IBE;
1047
        *edx = 0;
1048
        break;
1049
    case 6:
1050
        /* Thermal and Power Leaf */
1051
        *eax = 0;
1052
        *ebx = 0;
1053
        *ecx = 0;
1054
        *edx = 0;
1055
        break;
1056
    case 9:
1057
        /* Direct Cache Access Information Leaf */
1058
        *eax = 0; /* Bits 0-31 in DCA_CAP MSR */
1059
        *ebx = 0;
1060
        *ecx = 0;
1061
        *edx = 0;
1062
        break;
1063
    case 0xA:
1064
        /* Architectural Performance Monitoring Leaf */
1065
        *eax = 0;
1066
        *ebx = 0;
1067
        *ecx = 0;
1068
        *edx = 0;
1069
        break;
1070
    case 0x80000000:
1071
        *eax = env->cpuid_xlevel;
1072
        *ebx = env->cpuid_vendor1;
1073
        *edx = env->cpuid_vendor2;
1074
        *ecx = env->cpuid_vendor3;
1075
        break;
1076
    case 0x80000001:
1077
        *eax = env->cpuid_version;
1078
        *ebx = 0;
1079
        *ecx = env->cpuid_ext3_features;
1080
        *edx = env->cpuid_ext2_features;
1081

    
1082
        /* The Linux kernel checks for the CMPLegacy bit and
1083
         * discards multiple thread information if it is set.
1084
         * So dont set it here for Intel to make Linux guests happy.
1085
         */
1086
        if (env->nr_cores * env->nr_threads > 1) {
1087
            uint32_t tebx, tecx, tedx;
1088
            get_cpuid_vendor(env, &tebx, &tecx, &tedx);
1089
            if (tebx != CPUID_VENDOR_INTEL_1 ||
1090
                tedx != CPUID_VENDOR_INTEL_2 ||
1091
                tecx != CPUID_VENDOR_INTEL_3) {
1092
                *ecx |= 1 << 1;    /* CmpLegacy bit */
1093
            }
1094
        }
1095

    
1096
        if (kvm_enabled()) {
1097
            /* Nested SVM not yet supported in upstream QEMU */
1098
            *ecx &= ~CPUID_EXT3_SVM;
1099
        }
1100
        break;
1101
    case 0x80000002:
1102
    case 0x80000003:
1103
    case 0x80000004:
1104
        *eax = env->cpuid_model[(index - 0x80000002) * 4 + 0];
1105
        *ebx = env->cpuid_model[(index - 0x80000002) * 4 + 1];
1106
        *ecx = env->cpuid_model[(index - 0x80000002) * 4 + 2];
1107
        *edx = env->cpuid_model[(index - 0x80000002) * 4 + 3];
1108
        break;
1109
    case 0x80000005:
1110
        /* cache info (L1 cache) */
1111
        *eax = 0x01ff01ff;
1112
        *ebx = 0x01ff01ff;
1113
        *ecx = 0x40020140;
1114
        *edx = 0x40020140;
1115
        break;
1116
    case 0x80000006:
1117
        /* cache info (L2 cache) */
1118
        *eax = 0;
1119
        *ebx = 0x42004200;
1120
        *ecx = 0x02008140;
1121
        *edx = 0;
1122
        break;
1123
    case 0x80000008:
1124
        /* virtual & phys address size in low 2 bytes. */
1125
/* XXX: This value must match the one used in the MMU code. */
1126
        if (env->cpuid_ext2_features & CPUID_EXT2_LM) {
1127
            /* 64 bit processor */
1128
/* XXX: The physical address space is limited to 42 bits in exec.c. */
1129
            *eax = 0x00003028;        /* 48 bits virtual, 40 bits physical */
1130
        } else {
1131
            if (env->cpuid_features & CPUID_PSE36)
1132
                *eax = 0x00000024; /* 36 bits physical */
1133
            else
1134
                *eax = 0x00000020; /* 32 bits physical */
1135
        }
1136
        *ebx = 0;
1137
        *ecx = 0;
1138
        *edx = 0;
1139
        if (env->nr_cores * env->nr_threads > 1) {
1140
            *ecx |= (env->nr_cores * env->nr_threads) - 1;
1141
        }
1142
        break;
1143
    case 0x8000000A:
1144
        *eax = 0x00000001; /* SVM Revision */
1145
        *ebx = 0x00000010; /* nr of ASIDs */
1146
        *ecx = 0;
1147
        *edx = 0; /* optional features */
1148
        break;
1149
    default:
1150
        /* reserved values: zero */
1151
        *eax = 0;
1152
        *ebx = 0;
1153
        *ecx = 0;
1154
        *edx = 0;
1155
        break;
1156
    }
1157
}