tests/test-x86-cpuid-compat.c

   1 #include "qemu/osdep.h"
   2 #include "qemu-common.h"
   3 #include "qapi/qmp/qdict.h"
   4 #include "qapi/qmp/qlist.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     qobject_unref(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_ref(ret);
  34     qobject_unref(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     qobject_unref(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     qobject_unref(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,
 120                                                  qdict_get(w, "features")),
 121                                       &val));
 122             return val;
 123         }
 124     }
 125     return 0;
 126 }
 127
 128 static void test_feature_flag(const void *data)
 129 {
 130     const FeatureTestArgs *args = data;
 131     char *path;
 132     QList *present, *filtered;
 133     uint32_t value;
 134
 135     qtest_start(args->cmdline);
 136     path = get_cpu0_qom_path();
 137     present = qobject_to(QList, qom_get(path, "feature-words"));
 138     filtered = qobject_to(QList, qom_get(path, "filtered-features"));
 139     value = get_feature_word(present, args->in_eax, args->in_ecx, args->reg);
 140     value |= get_feature_word(filtered, args->in_eax, args->in_ecx, args->reg);
 141     qtest_end();
 142
 143     g_assert(!!(value & (1U << args->bitnr)) == args->expected_value);
 144
 145     qobject_unref(present);
 146     qobject_unref(filtered);
 147     g_free(path);
 148 }
 149
 150 /*
 151  * Add test case to ensure that a given feature flag is set in
 152  * either "feature-words" or "filtered-features", when running QEMU
 153  * using cmdline
 154  */
 155 static FeatureTestArgs *add_feature_test(const char *name, const char *cmdline,
 156                                          uint32_t eax, uint32_t ecx,
 157                                          const char *reg, int bitnr,
 158                                          bool expected_value)
 159 {
 160     FeatureTestArgs *args = g_new0(FeatureTestArgs, 1);
 161     args->cmdline = cmdline;
 162     args->in_eax = eax;
 163     args->in_ecx = ecx;
 164     args->reg = reg;
 165     args->bitnr = bitnr;
 166     args->expected_value = expected_value;
 167     qtest_add_data_func(name, args, test_feature_flag);
 168     return args;
 169 }
 170
 171 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
 172 static void test_plus_minus_subprocess(void)
 173 {
 174     char *path;
 175
 176     /* Rules:
 177      * 1)"-foo" overrides "+foo"
 178      * 2) "[+-]foo" overrides "foo=..."
 179      * 3) Old feature names with underscores (e.g. "sse4_2")
 180      *    should keep working
 181      *
 182      * Note: rules 1 and 2 are planned to be removed soon, and
 183      * should generate a warning.
 184      */
 185     qtest_start("-cpu pentium,-fpu,+fpu,-mce,mce=on,+cx8,cx8=off,+sse4_1,sse4_2=on");
 186     path = get_cpu0_qom_path();
 187
 188     g_assert_false(qom_get_bool(path, "fpu"));
 189     g_assert_false(qom_get_bool(path, "mce"));
 190     g_assert_true(qom_get_bool(path, "cx8"));
 191
 192     /* Test both the original and the alias feature names: */
 193     g_assert_true(qom_get_bool(path, "sse4-1"));
 194     g_assert_true(qom_get_bool(path, "sse4.1"));
 195
 196     g_assert_true(qom_get_bool(path, "sse4-2"));
 197     g_assert_true(qom_get_bool(path, "sse4.2"));
 198
 199     qtest_end();
 200     g_free(path);
 201 }
 202
 203 static void test_plus_minus(void)
 204 {
 205     g_test_trap_subprocess("/x86/cpuid/parsing-plus-minus/subprocess", 0, 0);
 206     g_test_trap_assert_passed();
 207     g_test_trap_assert_stderr("*Ambiguous CPU model string. "
 208                               "Don't mix both \"-mce\" and \"mce=on\"*");
 209     g_test_trap_assert_stderr("*Ambiguous CPU model string. "
 210                               "Don't mix both \"+cx8\" and \"cx8=off\"*");
 211     g_test_trap_assert_stdout("");
 212 }
 213 #endif
 214
 215 int main(int argc, char **argv)
 216 {
 217     g_test_init(&argc, &argv, NULL);
 218
 219 #ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
 220     g_test_add_func("/x86/cpuid/parsing-plus-minus/subprocess",
 221                     test_plus_minus_subprocess);
 222     g_test_add_func("/x86/cpuid/parsing-plus-minus", test_plus_minus);
 223 #endif
 224
 225     /* Original level values for CPU models: */
 226     add_cpuid_test("x86/cpuid/phenom/level",
 227                    "-cpu phenom", "level", 5);
 228     add_cpuid_test("x86/cpuid/Conroe/level",
 229                    "-cpu Conroe", "level", 10);
 230     add_cpuid_test("x86/cpuid/SandyBridge/level",
 231                    "-cpu SandyBridge", "level", 0xd);
 232     add_cpuid_test("x86/cpuid/486/xlevel",
 233                    "-cpu 486", "xlevel", 0);
 234     add_cpuid_test("x86/cpuid/core2duo/xlevel",
 235                    "-cpu core2duo", "xlevel", 0x80000008);
 236     add_cpuid_test("x86/cpuid/phenom/xlevel",
 237                    "-cpu phenom", "xlevel", 0x8000001A);
 238     add_cpuid_test("x86/cpuid/athlon/xlevel",
 239                    "-cpu athlon", "xlevel", 0x80000008);
 240
 241     /* If level is not large enough, it should increase automatically: */
 242     /* CPUID[6].EAX: */
 243     add_cpuid_test("x86/cpuid/auto-level/phenom/arat",
 244                    "-cpu 486,+arat", "level", 6);
 245     /* CPUID[EAX=7,ECX=0].EBX: */
 246     add_cpuid_test("x86/cpuid/auto-level/phenom/fsgsbase",
 247                    "-cpu phenom,+fsgsbase", "level", 7);
 248     /* CPUID[EAX=7,ECX=0].ECX: */
 249     add_cpuid_test("x86/cpuid/auto-level/phenom/avx512vbmi",
 250                    "-cpu phenom,+avx512vbmi", "level", 7);
 251     /* CPUID[EAX=0xd,ECX=1].EAX: */
 252     add_cpuid_test("x86/cpuid/auto-level/phenom/xsaveopt",
 253                    "-cpu phenom,+xsaveopt", "level", 0xd);
 254     /* CPUID[8000_0001].EDX: */
 255     add_cpuid_test("x86/cpuid/auto-xlevel/486/3dnow",
 256                    "-cpu 486,+3dnow", "xlevel", 0x80000001);
 257     /* CPUID[8000_0001].ECX: */
 258     add_cpuid_test("x86/cpuid/auto-xlevel/486/sse4a",
 259                    "-cpu 486,+sse4a", "xlevel", 0x80000001);
 260     /* CPUID[8000_0007].EDX: */
 261     add_cpuid_test("x86/cpuid/auto-xlevel/486/invtsc",
 262                    "-cpu 486,+invtsc", "xlevel", 0x80000007);
 263     /* CPUID[8000_000A].EDX: */
 264     add_cpuid_test("x86/cpuid/auto-xlevel/486/npt",
 265                    "-cpu 486,+npt", "xlevel", 0x8000000A);
 266     /* CPUID[C000_0001].EDX: */
 267     add_cpuid_test("x86/cpuid/auto-xlevel2/phenom/xstore",
 268                    "-cpu phenom,+xstore", "xlevel2", 0xC0000001);
 269     /* SVM needs CPUID[0x8000000A] */
 270     add_cpuid_test("x86/cpuid/auto-xlevel/athlon/svm",
 271                    "-cpu athlon,+svm", "xlevel", 0x8000000A);
 272
 273
 274     /* If level is already large enough, it shouldn't change: */
 275     add_cpuid_test("x86/cpuid/auto-level/SandyBridge/multiple",
 276                    "-cpu SandyBridge,+arat,+fsgsbase,+avx512vbmi",
 277                    "level", 0xd);
 278     /* If level is explicitly set, it shouldn't change: */
 279     add_cpuid_test("x86/cpuid/auto-level/486/fixed/0xF",
 280                    "-cpu 486,level=0xF,+arat,+fsgsbase,+avx512vbmi,+xsaveopt",
 281                    "level", 0xF);
 282     add_cpuid_test("x86/cpuid/auto-level/486/fixed/2",
 283                    "-cpu 486,level=2,+arat,+fsgsbase,+avx512vbmi,+xsaveopt",
 284                    "level", 2);
 285     add_cpuid_test("x86/cpuid/auto-level/486/fixed/0",
 286                    "-cpu 486,level=0,+arat,+fsgsbase,+avx512vbmi,+xsaveopt",
 287                    "level", 0);
 288
 289     /* if xlevel is already large enough, it shouldn't change: */
 290     add_cpuid_test("x86/cpuid/auto-xlevel/phenom/3dnow",
 291                    "-cpu phenom,+3dnow,+sse4a,+invtsc,+npt,+svm",
 292                    "xlevel", 0x8000001A);
 293     /* If xlevel is explicitly set, it shouldn't change: */
 294     add_cpuid_test("x86/cpuid/auto-xlevel/486/fixed/80000002",
 295                    "-cpu 486,xlevel=0x80000002,+3dnow,+sse4a,+invtsc,+npt,+svm",
 296                    "xlevel", 0x80000002);
 297     add_cpuid_test("x86/cpuid/auto-xlevel/486/fixed/8000001A",
 298                    "-cpu 486,xlevel=0x8000001A,+3dnow,+sse4a,+invtsc,+npt,+svm",
 299                    "xlevel", 0x8000001A);
 300     add_cpuid_test("x86/cpuid/auto-xlevel/phenom/fixed/0",
 301                    "-cpu 486,xlevel=0,+3dnow,+sse4a,+invtsc,+npt,+svm",
 302                    "xlevel", 0);
 303
 304     /* if xlevel2 is already large enough, it shouldn't change: */
 305     add_cpuid_test("x86/cpuid/auto-xlevel2/486/fixed",
 306                    "-cpu 486,xlevel2=0xC0000002,+xstore",
 307                    "xlevel2", 0xC0000002);
 308
 309     /* Check compatibility of old machine-types that didn't
 310      * auto-increase level/xlevel/xlevel2: */
 311
 312     add_cpuid_test("x86/cpuid/auto-level/pc-2.7",
 313                    "-machine pc-i440fx-2.7 -cpu 486,+arat,+avx512vbmi,+xsaveopt",
 314                    "level", 1);
 315     add_cpuid_test("x86/cpuid/auto-xlevel/pc-2.7",
 316                    "-machine pc-i440fx-2.7 -cpu 486,+3dnow,+sse4a,+invtsc,+npt,+svm",
 317                    "xlevel", 0);
 318     add_cpuid_test("x86/cpuid/auto-xlevel2/pc-2.7",
 319                    "-machine pc-i440fx-2.7 -cpu 486,+xstore",
 320                    "xlevel2", 0);
 321     /*
 322      * QEMU 1.4.0 had auto-level enabled for CPUID[7], already,
 323      * and the compat code that sets default level shouldn't
 324      * disable the auto-level=7 code:
 325      */
 326     add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-1.4/off",
 327                    "-machine pc-i440fx-1.4 -cpu Nehalem",
 328                    "level", 2);
 329     add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-1.5/on",
 330                    "-machine pc-i440fx-1.4 -cpu Nehalem,+smap",
 331                    "level", 7);
 332     add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-2.3/off",
 333                    "-machine pc-i440fx-2.3 -cpu Penryn",
 334                    "level", 4);
 335     add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-2.3/on",
 336                    "-machine pc-i440fx-2.3 -cpu Penryn,+erms",
 337                    "level", 7);
 338     add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-2.9/off",
 339                    "-machine pc-i440fx-2.9 -cpu Conroe",
 340                    "level", 10);
 341     add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-2.9/on",
 342                    "-machine pc-i440fx-2.9 -cpu Conroe,+erms",
 343                    "level", 10);
 344
 345     /*
 346      * xlevel doesn't have any feature that triggers auto-level
 347      * code on old machine-types.  Just check that the compat code
 348      * is working correctly:
 349      */
 350     add_cpuid_test("x86/cpuid/xlevel-compat/pc-i440fx-2.3",
 351                    "-machine pc-i440fx-2.3 -cpu SandyBridge",
 352                    "xlevel", 0x8000000a);
 353     add_cpuid_test("x86/cpuid/xlevel-compat/pc-i440fx-2.4/npt-off",
 354                    "-machine pc-i440fx-2.4 -cpu SandyBridge,",
 355                    "xlevel", 0x80000008);
 356     add_cpuid_test("x86/cpuid/xlevel-compat/pc-i440fx-2.4/npt-on",
 357                    "-machine pc-i440fx-2.4 -cpu SandyBridge,+npt",
 358                    "xlevel", 0x80000008);
 359
 360     /* Test feature parsing */
 361     add_feature_test("x86/cpuid/features/plus",
 362                      "-cpu 486,+arat",
 363                      6, 0, "EAX", 2, true);
 364     add_feature_test("x86/cpuid/features/minus",
 365                      "-cpu pentium,-mmx",
 366                      1, 0, "EDX", 23, false);
 367     add_feature_test("x86/cpuid/features/on",
 368                      "-cpu 486,arat=on",
 369                      6, 0, "EAX", 2, true);
 370     add_feature_test("x86/cpuid/features/off",
 371                      "-cpu pentium,mmx=off",
 372                      1, 0, "EDX", 23, false);
 373     add_feature_test("x86/cpuid/features/max-plus-invtsc",
 374                      "-cpu max,+invtsc",
 375                      0x80000007, 0, "EDX", 8, true);
 376     add_feature_test("x86/cpuid/features/max-invtsc-on",
 377                      "-cpu max,invtsc=on",
 378                      0x80000007, 0, "EDX", 8, true);
 379     add_feature_test("x86/cpuid/features/max-minus-mmx",
 380                      "-cpu max,-mmx",
 381                      1, 0, "EDX", 23, false);
 382     add_feature_test("x86/cpuid/features/max-invtsc-on,mmx=off",
 383                      "-cpu max,mmx=off",
 384                      1, 0, "EDX", 23, false);
 385
 386     return g_test_run();
 387 }