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-single.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,+svm,+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,+svm,+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