LXR qemu/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
   9static 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
  26static 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
  38static 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
  47typedef struct CpuidTestArgs {
  48    const char *cmdline;
  49    const char *property;
  50    int64_t expected_value;
  51} CpuidTestArgs;
  52
  53static 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
  71static 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 */
  83typedef 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 */
 100static 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
 126static 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 */
 153static 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
 169static 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
 200static 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
 211int 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}
 382