tests/test-x86-cpuid-compat.c

   1 #include "qemu/osdep.h"
   2 #include "qemu-common.h"
   3 #include "qapi/error.h"
   4 #include "qapi/qmp/qdict.h"
   5 #include "qapi/qmp/qnum.h"
   6 #include "qapi/qmp/qbool.h"
   7 #include "libqtest.h"
   8
   9 static char *get_cpu0_qom_path(void)
  10 {
  11     QDict *resp;
  12     QList *ret;
  13     QDict *cpu0;
  14     char *path;
  15
  16     resp = qmp("{'execute': 'query-cpus', 'arguments': {}}");
  17     g_assert(qdict_haskey(resp, "return"));
  18     ret = qdict_get_qlist(resp, "return");
  19
  20     cpu0 = qobject_to_qdict(qlist_peek(ret));
  21     path = g_strdup(qdict_get_str(cpu0, "qom_path"));
  22     QDECREF(resp);
  23     return path;
  24 }
  25
  26 static QObject *qom_get(const char *path, const char *prop)
  27 {
  28     QDict *resp = qmp("{ 'execute': 'qom-get',"
  29                       "  'arguments': { 'path': %s,"
  30                       "                 'property': %s } }",
  31                       path, prop);
  32     QObject *ret = qdict_get(resp, "return");
  33     qobject_incref(ret);
  34     QDECREF(resp);
  35     return ret;
  36 }
  37
  38 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
  39 static bool qom_get_bool(const char *path, const char *prop)
  40 {
  41     QBool *value = qobject_to_qbool(qom_get(path, prop));
  42     bool b = qbool_get_bool(value);
  43
  44     QDECREF(value);
  45     return b;
  46 }
  47 #endif
  48
  49 typedef struct CpuidTestArgs {
  50     const char *cmdline;
  51     const char *property;
  52     int64_t expected_value;
  53 } CpuidTestArgs;
  54
  55 static void test_cpuid_prop(const void *data)
  56 {
  57     const CpuidTestArgs *args = data;
  58     char *path;
  59     QNum *value;
  60     int64_t val;
  61
  62     qtest_start(args->cmdline);
  63     path = get_cpu0_qom_path();
  64     value = qobject_to_qnum(qom_get(path, args->property));
  65     g_assert(qnum_get_try_int(value, &val));
  66     g_assert_cmpint(val, ==, args->expected_value);
  67     qtest_end();
  68
  69     QDECREF(value);
  70     g_free(path);
  71 }
  72
  73 static void add_cpuid_test(const char *name, const char *cmdline,
  74                            const char *property, int64_t expected_value)
  75 {
  76     CpuidTestArgs *args = g_new0(CpuidTestArgs, 1);
  77     args->cmdline = cmdline;
  78     args->property = property;
  79     args->expected_value = expected_value;
  80     qtest_add_data_func(name, args, test_cpuid_prop);
  81 }
  82
  83
  84 /* Parameters to a add_feature_test() test case */
  85 typedef struct FeatureTestArgs {
  86     /* cmdline to start QEMU */
  87     const char *cmdline;
  88     /*
  89      * cpuid-input-eax and cpuid-input-ecx values to look for,
  90      * in "feature-words" and "filtered-features" properties.
  91      */
  92     uint32_t in_eax, in_ecx;
  93     /* The register name to look for, in the X86CPUFeatureWordInfo array */
  94     const char *reg;
  95     /* The bit to check in X86CPUFeatureWordInfo.features */
  96     int bitnr;
  97     /* The expected value for the bit in (X86CPUFeatureWordInfo.features) */
  98     bool expected_value;
  99 } FeatureTestArgs;
 100
 101 /* Get the value for a feature word in a X86CPUFeatureWordInfo list */
 102 static uint32_t get_feature_word(QList *features, uint32_t eax, uint32_t ecx,
 103                                  const char *reg)
 104 {
 105     const QListEntry *e;
 106
 107     for (e = qlist_first(features); e; e = qlist_next(e)) {
 108         QDict *w = qobject_to_qdict(qlist_entry_obj(e));
 109         const char *rreg = qdict_get_str(w, "cpuid-register");
 110         uint32_t reax = qdict_get_int(w, "cpuid-input-eax");
 111         bool has_ecx = qdict_haskey(w, "cpuid-input-ecx");
 112         uint32_t recx = 0;
 113         int64_t val;
 114
 115         if (has_ecx) {
 116             recx = qdict_get_int(w, "cpuid-input-ecx");
 117         }
 118         if (eax == reax && (!has_ecx || ecx == recx) && !strcmp(rreg, reg)) {
 119             g_assert(qnum_get_try_int(qobject_to_qnum(qdict_get(w, "features")),
 120                                   &val));
 121             return val;
 122         }
 123     }
 124     return 0;
 125 }
 126
 127 static void test_feature_flag(const void *data)
 128 {
 129     const FeatureTestArgs *args = data;
 130     char *path;
 131     QList *present, *filtered;
 132     uint32_t value;
 133
 134     qtest_start(args->cmdline);
 135     path = get_cpu0_qom_path();
 136     present = qobject_to_qlist(qom_get(path, "feature-words"));
 137     filtered = qobject_to_qlist(qom_get(path, "filtered-features"));
 138     value = get_feature_word(present, args->in_eax, args->in_ecx, args->reg);
 139     value |= get_feature_word(filtered, args->in_eax, args->in_ecx, args->reg);
 140     qtest_end();
 141
 142     g_assert(!!(value & (1U << args->bitnr)) == args->expected_value);
 143
 144     QDECREF(present);
 145     QDECREF(filtered);
 146     g_free(path);
 147 }
 148
 149 /*
 150  * Add test case to ensure that a given feature flag is set in
 151  * either "feature-words" or "filtered-features", when running QEMU
 152  * using cmdline
 153  */
 154 static FeatureTestArgs *add_feature_test(const char *name, const char *cmdline,
 155                                          uint32_t eax, uint32_t ecx,
 156                                          const char *reg, int bitnr,
 157                                          bool expected_value)
 158 {
 159     FeatureTestArgs *args = g_new0(FeatureTestArgs, 1);
 160     args->cmdline = cmdline;
 161     args->in_eax = eax;
 162     args->in_ecx = ecx;
 163     args->reg = reg;
 164     args->bitnr = bitnr;
 165     args->expected_value = expected_value;
 166     qtest_add_data_func(name, args, test_feature_flag);
 167     return args;
 168 }
 169
 170 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
 171 static void test_plus_minus_subprocess(void)
 172 {
 173     char *path;
 174
 175     /* Rules:
 176      * 1)"-foo" overrides "+foo"
 177      * 2) "[+-]foo" overrides "foo=..."
 178      * 3) Old feature names with underscores (e.g. "sse4_2")
 179      *    should keep working
 180      *
 181      * Note: rules 1 and 2 are planned to be removed soon, and
 182      * should generate a warning.
 183      */
 184     qtest_start("-cpu pentium,-fpu,+fpu,-mce,mce=on,+cx8,cx8=off,+sse4_1,sse4_2=on");
 185     path = get_cpu0_qom_path();
 186
 187     g_assert_false(qom_get_bool(path, "fpu"));
 188     g_assert_false(qom_get_bool(path, "mce"));
 189     g_assert_true(qom_get_bool(path, "cx8"));
 190
 191     /* Test both the original and the alias feature names: */
 192     g_assert_true(qom_get_bool(path, "sse4-1"));
 193     g_assert_true(qom_get_bool(path, "sse4.1"));
 194
 195     g_assert_true(qom_get_bool(path, "sse4-2"));
 196     g_assert_true(qom_get_bool(path, "sse4.2"));
 197
 198     qtest_end();
 199     g_free(path);
 200 }
 201
 202 static void test_plus_minus(void)
 203 {
 204     g_test_trap_subprocess("/x86/cpuid/parsing-plus-minus/subprocess", 0, 0);
 205     g_test_trap_assert_passed();
 206     g_test_trap_assert_stderr("*Ambiguous CPU model string. "
 207                               "Don't mix both \"-mce\" and \"mce=on\"*");
 208     g_test_trap_assert_stderr("*Ambiguous CPU model string. "
 209                               "Don't mix both \"+cx8\" and \"cx8=off\"*");
 210     g_test_trap_assert_stdout("");
 211 }
 212 #endif
 213
 214 int main(int argc, char **argv)
 215 {
 216     g_test_init(&argc, &argv, NULL);
 217
 218 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
 219     g_test_add_func("/x86/cpuid/parsing-plus-minus/subprocess",
 220                     test_plus_minus_subprocess);
 221     g_test_add_func("/x86/cpuid/parsing-plus-minus", test_plus_minus);
 222 #endif
 223
 224     /* Original level values for CPU models: */
 225     add_cpuid_test("x86/cpuid/phenom/level",
 226                    "-cpu phenom", "level", 5);
 227     add_cpuid_test("x86/cpuid/Conroe/level",
 228                    "-cpu Conroe", "level", 10);
 229     add_cpuid_test("x86/cpuid/SandyBridge/level",
 230                    "-cpu SandyBridge", "level", 0xd);
 231     add_cpuid_test("x86/cpuid/486/xlevel",
 232                    "-cpu 486", "xlevel", 0);
 233     add_cpuid_test("x86/cpuid/core2duo/xlevel",
 234                    "-cpu core2duo", "xlevel", 0x80000008);
 235     add_cpuid_test("x86/cpuid/phenom/xlevel",
 236                    "-cpu phenom", "xlevel", 0x8000001A);
 237     add_cpuid_test("x86/cpuid/athlon/xlevel",
 238                    "-cpu athlon", "xlevel", 0x80000008);
 239
 240     /* If level is not large enough, it should increase automatically: */
 241     /* CPUID[6].EAX: */
 242     add_cpuid_test("x86/cpuid/auto-level/phenom/arat",
 243                    "-cpu 486,+arat", "level", 6);
 244     /* CPUID[EAX=7,ECX=0].EBX: */
 245     add_cpuid_test("x86/cpuid/auto-level/phenom/fsgsbase",
 246                    "-cpu phenom,+fsgsbase", "level", 7);
 247     /* CPUID[EAX=7,ECX=0].ECX: */
 248     add_cpuid_test("x86/cpuid/auto-level/phenom/avx512vbmi",
 249                    "-cpu phenom,+avx512vbmi", "level", 7);
 250     /* CPUID[EAX=0xd,ECX=1].EAX: */
 251     add_cpuid_test("x86/cpuid/auto-level/phenom/xsaveopt",
 252                    "-cpu phenom,+xsaveopt", "level", 0xd);
 253     /* CPUID[8000_0001].EDX: */
 254     add_cpuid_test("x86/cpuid/auto-xlevel/486/3dnow",
 255                    "-cpu 486,+3dnow", "xlevel", 0x80000001);
 256     /* CPUID[8000_0001].ECX: */
 257     add_cpuid_test("x86/cpuid/auto-xlevel/486/sse4a",
 258                    "-cpu 486,+sse4a", "xlevel", 0x80000001);
 259     /* CPUID[8000_0007].EDX: */
 260     add_cpuid_test("x86/cpuid/auto-xlevel/486/invtsc",
 261                    "-cpu 486,+invtsc", "xlevel", 0x80000007);
 262     /* CPUID[8000_000A].EDX: */
 263     add_cpuid_test("x86/cpuid/auto-xlevel/486/npt",
 264                    "-cpu 486,+npt", "xlevel", 0x8000000A);
 265     /* CPUID[C000_0001].EDX: */
 266     add_cpuid_test("x86/cpuid/auto-xlevel2/phenom/xstore",
 267                    "-cpu phenom,+xstore", "xlevel2", 0xC0000001);
 268     /* SVM needs CPUID[0x8000000A] */
 269     add_cpuid_test("x86/cpuid/auto-xlevel/athlon/svm",
 270                    "-cpu athlon,+svm", "xlevel", 0x8000000A);
 271
 272
 273     /* If level is already large enough, it shouldn't change: */
 274     add_cpuid_test("x86/cpuid/auto-level/SandyBridge/multiple",
 275                    "-cpu SandyBridge,+arat,+fsgsbase,+avx512vbmi",
 276                    "level", 0xd);
 277     /* If level is explicitly set, it shouldn't change: */
 278     add_cpuid_test("x86/cpuid/auto-level/486/fixed/0xF",
 279                    "-cpu 486,level=0xF,+arat,+fsgsbase,+avx512vbmi,+xsaveopt",
 280                    "level", 0xF);
 281     add_cpuid_test("x86/cpuid/auto-level/486/fixed/2",
 282                    "-cpu 486,level=2,+arat,+fsgsbase,+avx512vbmi,+xsaveopt",
 283                    "level", 2);
 284     add_cpuid_test("x86/cpuid/auto-level/486/fixed/0",
 285                    "-cpu 486,level=0,+arat,+fsgsbase,+avx512vbmi,+xsaveopt",
 286                    "level", 0);
 287
 288     /* if xlevel is already large enough, it shouldn't change: */
 289     add_cpuid_test("x86/cpuid/auto-xlevel/phenom/3dnow",
 290                    "-cpu phenom,+3dnow,+sse4a,+invtsc,+npt,+svm",
 291                    "xlevel", 0x8000001A);
 292     /* If xlevel is explicitly set, it shouldn't change: */
 293     add_cpuid_test("x86/cpuid/auto-xlevel/486/fixed/80000002",
 294                    "-cpu 486,xlevel=0x80000002,+3dnow,+sse4a,+invtsc,+npt,+svm",
 295                    "xlevel", 0x80000002);
 296     add_cpuid_test("x86/cpuid/auto-xlevel/486/fixed/8000001A",
 297                    "-cpu 486,xlevel=0x8000001A,+3dnow,+sse4a,+invtsc,+npt,+svm",
 298                    "xlevel", 0x8000001A);
 299     add_cpuid_test("x86/cpuid/auto-xlevel/phenom/fixed/0",
 300                    "-cpu 486,xlevel=0,+3dnow,+sse4a,+invtsc,+npt,+svm",
 301                    "xlevel", 0);
 302
 303     /* if xlevel2 is already large enough, it shouldn't change: */
 304     add_cpuid_test("x86/cpuid/auto-xlevel2/486/fixed",
 305                    "-cpu 486,xlevel2=0xC0000002,+xstore",
 306                    "xlevel2", 0xC0000002);
 307
 308     /* Check compatibility of old machine-types that didn't
 309      * auto-increase level/xlevel/xlevel2: */
 310
 311     add_cpuid_test("x86/cpuid/auto-level/pc-2.7",
 312                    "-machine pc-i440fx-2.7 -cpu 486,+arat,+avx512vbmi,+xsaveopt",
 313                    "level", 1);
 314     add_cpuid_test("x86/cpuid/auto-xlevel/pc-2.7",
 315                    "-machine pc-i440fx-2.7 -cpu 486,+3dnow,+sse4a,+invtsc,+npt,+svm",
 316                    "xlevel", 0);
 317     add_cpuid_test("x86/cpuid/auto-xlevel2/pc-2.7",
 318                    "-machine pc-i440fx-2.7 -cpu 486,+xstore",
 319                    "xlevel2", 0);
 320     /*
 321      * QEMU 1.4.0 had auto-level enabled for CPUID[7], already,
 322      * and the compat code that sets default level shouldn't
 323      * disable the auto-level=7 code:
 324      */
 325     add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-1.4/off",
 326                    "-machine pc-i440fx-1.4 -cpu Nehalem",
 327                    "level", 2);
 328     add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-1.5/on",
 329                    "-machine pc-i440fx-1.4 -cpu Nehalem,+smap",
 330                    "level", 7);
 331     add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-2.3/off",
 332                    "-machine pc-i440fx-2.3 -cpu Penryn",
 333                    "level", 4);
 334     add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-2.3/on",
 335                    "-machine pc-i440fx-2.3 -cpu Penryn,+erms",
 336                    "level", 7);
 337     add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-2.9/off",
 338                    "-machine pc-i440fx-2.9 -cpu Conroe",
 339                    "level", 10);
 340     add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-2.9/on",
 341                    "-machine pc-i440fx-2.9 -cpu Conroe,+erms",
 342                    "level", 10);
 343
 344     /*
 345      * xlevel doesn't have any feature that triggers auto-level
 346      * code on old machine-types.  Just check that the compat code
 347      * is working correctly:
 348      */
 349     add_cpuid_test("x86/cpuid/xlevel-compat/pc-i440fx-2.3",
 350                    "-machine pc-i440fx-2.3 -cpu SandyBridge",
 351                    "xlevel", 0x8000000a);
 352     add_cpuid_test("x86/cpuid/xlevel-compat/pc-i440fx-2.4/npt-off",
 353                    "-machine pc-i440fx-2.4 -cpu SandyBridge,",
 354                    "xlevel", 0x80000008);
 355     add_cpuid_test("x86/cpuid/xlevel-compat/pc-i440fx-2.4/npt-on",
 356                    "-machine pc-i440fx-2.4 -cpu SandyBridge,+npt",
 357                    "xlevel", 0x80000008);
 358
 359     /* Test feature parsing */
 360     add_feature_test("x86/cpuid/features/plus",
 361                      "-cpu 486,+arat",
 362                      6, 0, "EAX", 2, true);
 363     add_feature_test("x86/cpuid/features/minus",
 364                      "-cpu pentium,-mmx",
 365                      1, 0, "EDX", 23, false);
 366     add_feature_test("x86/cpuid/features/on",
 367                      "-cpu 486,arat=on",
 368                      6, 0, "EAX", 2, true);
 369     add_feature_test("x86/cpuid/features/off",
 370                      "-cpu pentium,mmx=off",
 371                      1, 0, "EDX", 23, false);
 372     add_feature_test("x86/cpuid/features/max-plus-invtsc",
 373                      "-cpu max,+invtsc",
 374                      0x80000007, 0, "EDX", 8, true);
 375     add_feature_test("x86/cpuid/features/max-invtsc-on",
 376                      "-cpu max,invtsc=on",
 377                      0x80000007, 0, "EDX", 8, true);
 378     add_feature_test("x86/cpuid/features/max-minus-mmx",
 379                      "-cpu max,-mmx",
 380                      1, 0, "EDX", 23, false);
 381     add_feature_test("x86/cpuid/features/max-invtsc-on,mmx=off",
 382                      "-cpu max,mmx=off",
 383                      1, 0, "EDX", 23, false);
 384
 385     return g_test_run();
 386 }