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