1 #include "qemu/osdep.h"
2 #include "qapi/qmp/qdict.h"
3 #include "qapi/qmp/qlist.h"
4 #include "qapi/qmp/qnum.h"
5 #include "qapi/qmp/qbool.h"
6 #include "libqtest-single.h"
7 
8 static char *get_cpu0_qom_path(void)
9 {
10     QDict *resp;
11     QList *ret;
12     QDict *cpu0;
13     char *path;
14 
15     resp = qmp("{'execute': 'query-cpus-fast', 'arguments': {}}");
16     g_assert(qdict_haskey(resp, "return"));
17     ret = qdict_get_qlist(resp, "return");
18 
19     cpu0 = qobject_to(QDict, qlist_peek(ret));
20     path = g_strdup(qdict_get_str(cpu0, "qom-path"));
21     qobject_unref(resp);
22     return path;
23 }
24 
25 static QObject *qom_get(const char *path, const char *prop)
26 {
27     QDict *resp = qmp("{ 'execute': 'qom-get',"
28                       "  'arguments': { 'path': %s,"
29                       "                 'property': %s } }",
30                       path, prop);
31     QObject *ret = qdict_get(resp, "return");
32     qobject_ref(ret);
33     qobject_unref(resp);
34     return ret;
35 }
36 
37 static bool qom_get_bool(const char *path, const char *prop)
38 {
39     QBool *value = qobject_to(QBool, qom_get(path, prop));
40     bool b = qbool_get_bool(value);
41 
42     qobject_unref(value);
43     return b;
44 }
45 
46 typedef struct CpuidTestArgs {
47     const char *cmdline;
48     const char *property;
49     int64_t expected_value;
50 } CpuidTestArgs;
51 
52 static void test_cpuid_prop(const void *data)
53 {
54     const CpuidTestArgs *args = data;
55     char *path;
56     QNum *value;
57     int64_t val;
58 
59     qtest_start(args->cmdline);
60     path = get_cpu0_qom_path();
61     value = qobject_to(QNum, qom_get(path, args->property));
62     g_assert(qnum_get_try_int(value, &val));
63     g_assert_cmpint(val, ==, args->expected_value);
64     qtest_end();
65 
66     qobject_unref(value);
67     g_free(path);
68 }
69 
70 static void add_cpuid_test(const char *name, const char *cmdline,
71                            const char *property, int64_t expected_value)
72 {
73     CpuidTestArgs *args = g_new0(CpuidTestArgs, 1);
74     args->cmdline = cmdline;
75     args->property = property;
76     args->expected_value = expected_value;
77     qtest_add_data_func(name, args, test_cpuid_prop);
78 }
79 
80 
81 /* Parameters to a add_feature_test() test case */
82 typedef struct FeatureTestArgs {
83     /* cmdline to start QEMU */
84     const char *cmdline;
85     /*
86      * cpuid-input-eax and cpuid-input-ecx values to look for,
87      * in "feature-words" and "filtered-features" properties.
88      */
89     uint32_t in_eax, in_ecx;
90     /* The register name to look for, in the X86CPUFeatureWordInfo array */
91     const char *reg;
92     /* The bit to check in X86CPUFeatureWordInfo.features */
93     int bitnr;
94     /* The expected value for the bit in (X86CPUFeatureWordInfo.features) */
95     bool expected_value;
96 } FeatureTestArgs;
97 
98 /* Get the value for a feature word in a X86CPUFeatureWordInfo list */
99 static uint32_t get_feature_word(QList *features, uint32_t eax, uint32_t ecx,
100                                  const char *reg)
101 {
102     const QListEntry *e;
103 
104     for (e = qlist_first(features); e; e = qlist_next(e)) {
105         QDict *w = qobject_to(QDict, qlist_entry_obj(e));
106         const char *rreg = qdict_get_str(w, "cpuid-register");
107         uint32_t reax = qdict_get_int(w, "cpuid-input-eax");
108         bool has_ecx = qdict_haskey(w, "cpuid-input-ecx");
109         uint32_t recx = 0;
110         int64_t val;
111 
112         if (has_ecx) {
113             recx = qdict_get_int(w, "cpuid-input-ecx");
114         }
115         if (eax == reax && (!has_ecx || ecx == recx) && !strcmp(rreg, reg)) {
116             g_assert(qnum_get_try_int(qobject_to(QNum,
117                                                  qdict_get(w, "features")),
118                                       &val));
119             return val;
120         }
121     }
122     return 0;
123 }
124 
125 static void test_feature_flag(const void *data)
126 {
127     const FeatureTestArgs *args = data;
128     char *path;
129     QList *present, *filtered;
130     uint32_t value;
131 
132     qtest_start(args->cmdline);
133     path = get_cpu0_qom_path();
134     present = qobject_to(QList, qom_get(path, "feature-words"));
135     filtered = qobject_to(QList, qom_get(path, "filtered-features"));
136     value = get_feature_word(present, args->in_eax, args->in_ecx, args->reg);
137     value |= get_feature_word(filtered, args->in_eax, args->in_ecx, args->reg);
138     qtest_end();
139 
140     g_assert(!!(value & (1U << args->bitnr)) == args->expected_value);
141 
142     qobject_unref(present);
143     qobject_unref(filtered);
144     g_free(path);
145 }
146 
147 /*
148  * Add test case to ensure that a given feature flag is set in
149  * either "feature-words" or "filtered-features", when running QEMU
150  * using cmdline
151  */
152 static FeatureTestArgs *add_feature_test(const char *name, const char *cmdline,
153                                          uint32_t eax, uint32_t ecx,
154                                          const char *reg, int bitnr,
155                                          bool expected_value)
156 {
157     FeatureTestArgs *args = g_new0(FeatureTestArgs, 1);
158     args->cmdline = cmdline;
159     args->in_eax = eax;
160     args->in_ecx = ecx;
161     args->reg = reg;
162     args->bitnr = bitnr;
163     args->expected_value = expected_value;
164     qtest_add_data_func(name, args, test_feature_flag);
165     return args;
166 }
167 
168 static void test_plus_minus_subprocess(void)
169 {
170     char *path;
171 
172     /* Rules:
173      * 1)"-foo" overrides "+foo"
174      * 2) "[+-]foo" overrides "foo=..."
175      * 3) Old feature names with underscores (e.g. "sse4_2")
176      *    should keep working
177      *
178      * Note: rules 1 and 2 are planned to be removed soon, and
179      * should generate a warning.
180      */
181     qtest_start("-cpu pentium,-fpu,+fpu,-mce,mce=on,+cx8,cx8=off,+sse4_1,sse4_2=on");
182     path = get_cpu0_qom_path();
183 
184     g_assert_false(qom_get_bool(path, "fpu"));
185     g_assert_false(qom_get_bool(path, "mce"));
186     g_assert_true(qom_get_bool(path, "cx8"));
187 
188     /* Test both the original and the alias feature names: */
189     g_assert_true(qom_get_bool(path, "sse4-1"));
190     g_assert_true(qom_get_bool(path, "sse4.1"));
191 
192     g_assert_true(qom_get_bool(path, "sse4-2"));
193     g_assert_true(qom_get_bool(path, "sse4.2"));
194 
195     qtest_end();
196     g_free(path);
197 }
198 
199 static void test_plus_minus(void)
200 {
201     g_test_trap_subprocess("/x86/cpuid/parsing-plus-minus/subprocess", 0, 0);
202     g_test_trap_assert_passed();
203     g_test_trap_assert_stderr("*Ambiguous CPU model string. "
204                               "Don't mix both \"-mce\" and \"mce=on\"*");
205     g_test_trap_assert_stderr("*Ambiguous CPU model string. "
206                               "Don't mix both \"+cx8\" and \"cx8=off\"*");
207     g_test_trap_assert_stdout("");
208 }
209 
210 int main(int argc, char **argv)
211 {
212     g_test_init(&argc, &argv, NULL);
213 
214     g_test_add_func("/x86/cpuid/parsing-plus-minus/subprocess",
215                     test_plus_minus_subprocess);
216     g_test_add_func("/x86/cpuid/parsing-plus-minus", test_plus_minus);
217 
218     /* Original level values for CPU models: */
219     add_cpuid_test("x86/cpuid/phenom/level",
220                    "-cpu phenom", "level", 5);
221     add_cpuid_test("x86/cpuid/Conroe/level",
222                    "-cpu Conroe", "level", 10);
223     add_cpuid_test("x86/cpuid/SandyBridge/level",
224                    "-cpu SandyBridge", "level", 0xd);
225     add_cpuid_test("x86/cpuid/486/xlevel",
226                    "-cpu 486", "xlevel", 0);
227     add_cpuid_test("x86/cpuid/core2duo/xlevel",
228                    "-cpu core2duo", "xlevel", 0x80000008);
229     add_cpuid_test("x86/cpuid/phenom/xlevel",
230                    "-cpu phenom", "xlevel", 0x8000001A);
231     add_cpuid_test("x86/cpuid/athlon/xlevel",
232                    "-cpu athlon", "xlevel", 0x80000008);
233 
234     /* If level is not large enough, it should increase automatically: */
235     /* CPUID[6].EAX: */
236     add_cpuid_test("x86/cpuid/auto-level/phenom/arat",
237                    "-cpu 486,arat=on", "level", 6);
238     /* CPUID[EAX=7,ECX=0].EBX: */
239     add_cpuid_test("x86/cpuid/auto-level/phenom/fsgsbase",
240                    "-cpu phenom,fsgsbase=on", "level", 7);
241     /* CPUID[EAX=7,ECX=0].ECX: */
242     add_cpuid_test("x86/cpuid/auto-level/phenom/avx512vbmi",
243                    "-cpu phenom,avx512vbmi=on", "level", 7);
244     /* CPUID[EAX=0xd,ECX=1].EAX: */
245     add_cpuid_test("x86/cpuid/auto-level/phenom/xsaveopt",
246                    "-cpu phenom,xsaveopt=on", "level", 0xd);
247     /* CPUID[8000_0001].EDX: */
248     add_cpuid_test("x86/cpuid/auto-xlevel/486/3dnow",
249                    "-cpu 486,3dnow=on", "xlevel", 0x80000001);
250     /* CPUID[8000_0001].ECX: */
251     add_cpuid_test("x86/cpuid/auto-xlevel/486/sse4a",
252                    "-cpu 486,sse4a=on", "xlevel", 0x80000001);
253     /* CPUID[8000_0007].EDX: */
254     add_cpuid_test("x86/cpuid/auto-xlevel/486/invtsc",
255                    "-cpu 486,invtsc=on", "xlevel", 0x80000007);
256     /* CPUID[8000_000A].EDX: */
257     add_cpuid_test("x86/cpuid/auto-xlevel/486/npt",
258                    "-cpu 486,svm=on,npt=on", "xlevel", 0x8000000A);
259     /* CPUID[C000_0001].EDX: */
260     add_cpuid_test("x86/cpuid/auto-xlevel2/phenom/xstore",
261                    "-cpu phenom,xstore=on", "xlevel2", 0xC0000001);
262     /* SVM needs CPUID[0x8000000A] */
263     add_cpuid_test("x86/cpuid/auto-xlevel/athlon/svm",
264                    "-cpu athlon,svm=on", "xlevel", 0x8000000A);
265 
266 
267     /* If level is already large enough, it shouldn't change: */
268     add_cpuid_test("x86/cpuid/auto-level/SandyBridge/multiple",
269                    "-cpu SandyBridge,arat=on,fsgsbase=on,avx512vbmi=on",
270                    "level", 0xd);
271     /* If level is explicitly set, it shouldn't change: */
272     add_cpuid_test("x86/cpuid/auto-level/486/fixed/0xF",
273                    "-cpu 486,level=0xF,arat=on,fsgsbase=on,avx512vbmi=on,xsaveopt=on",
274                    "level", 0xF);
275     add_cpuid_test("x86/cpuid/auto-level/486/fixed/2",
276                    "-cpu 486,level=2,arat=on,fsgsbase=on,avx512vbmi=on,xsaveopt=on",
277                    "level", 2);
278     add_cpuid_test("x86/cpuid/auto-level/486/fixed/0",
279                    "-cpu 486,level=0,arat=on,fsgsbase=on,avx512vbmi=on,xsaveopt=on",
280                    "level", 0);
281 
282     /* if xlevel is already large enough, it shouldn't change: */
283     add_cpuid_test("x86/cpuid/auto-xlevel/phenom/3dnow",
284                    "-cpu phenom,3dnow=on,sse4a=on,invtsc=on,npt=on,svm=on",
285                    "xlevel", 0x8000001A);
286     /* If xlevel is explicitly set, it shouldn't change: */
287     add_cpuid_test("x86/cpuid/auto-xlevel/486/fixed/80000002",
288                    "-cpu 486,xlevel=0x80000002,3dnow=on,sse4a=on,invtsc=on,npt=on,svm=on",
289                    "xlevel", 0x80000002);
290     add_cpuid_test("x86/cpuid/auto-xlevel/486/fixed/8000001A",
291                    "-cpu 486,xlevel=0x8000001A,3dnow=on,sse4a=on,invtsc=on,npt=on,svm=on",
292                    "xlevel", 0x8000001A);
293     add_cpuid_test("x86/cpuid/auto-xlevel/phenom/fixed/0",
294                    "-cpu 486,xlevel=0,3dnow=on,sse4a=on,invtsc=on,npt=on,svm=on",
295                    "xlevel", 0);
296 
297     /* if xlevel2 is already large enough, it shouldn't change: */
298     add_cpuid_test("x86/cpuid/auto-xlevel2/486/fixed",
299                    "-cpu 486,xlevel2=0xC0000002,xstore=on",
300                    "xlevel2", 0xC0000002);
301 
302     /* Check compatibility of old machine-types that didn't
303      * auto-increase level/xlevel/xlevel2: */
304     if (qtest_has_machine("pc-i440fx-2.7")) {
305         add_cpuid_test("x86/cpuid/auto-level/pc-2.7",
306                        "-machine pc-i440fx-2.7 -cpu 486,arat=on,avx512vbmi=on,xsaveopt=on",
307                        "level", 1);
308         add_cpuid_test("x86/cpuid/auto-xlevel/pc-2.7",
309                        "-machine pc-i440fx-2.7 -cpu 486,3dnow=on,sse4a=on,invtsc=on,npt=on,svm=on",
310                        "xlevel", 0);
311         add_cpuid_test("x86/cpuid/auto-xlevel2/pc-2.7",
312                        "-machine pc-i440fx-2.7 -cpu 486,xstore=on",
313                        "xlevel2", 0);
314     }
315     /*
316      * QEMU 2.3.0 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     if (qtest_has_machine("pc-i440fx-2.3")) {
321         add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-2.3/off",
322                        "-machine pc-i440fx-2.3 -cpu Penryn",
323                        "level", 4);
324         add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-2.3/on",
325                        "-machine pc-i440fx-2.3 -cpu Penryn,erms=on",
326                        "level", 7);
327     }
328     if (qtest_has_machine("pc-i440fx-2.9")) {
329         add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-2.9/off",
330                        "-machine pc-i440fx-2.9 -cpu Conroe",
331                        "level", 10);
332         add_cpuid_test("x86/cpuid/auto-level7/pc-i440fx-2.9/on",
333                        "-machine pc-i440fx-2.9 -cpu Conroe,erms=on",
334                        "level", 10);
335     }
336 
337     /*
338      * xlevel doesn't have any feature that triggers auto-level
339      * code on old machine-types.  Just check that the compat code
340      * is working correctly:
341      */
342     if (qtest_has_machine("pc-i440fx-2.3")) {
343         add_cpuid_test("x86/cpuid/xlevel-compat/pc-i440fx-2.3",
344                        "-machine pc-i440fx-2.3 -cpu SandyBridge",
345                        "xlevel", 0x8000000a);
346     }
347     if (qtest_has_machine("pc-i440fx-2.4")) {
348         add_cpuid_test("x86/cpuid/xlevel-compat/pc-i440fx-2.4/npt-off",
349                        "-machine pc-i440fx-2.4 -cpu SandyBridge,",
350                        "xlevel", 0x80000008);
351         add_cpuid_test("x86/cpuid/xlevel-compat/pc-i440fx-2.4/npt-on",
352                        "-machine pc-i440fx-2.4 -cpu SandyBridge,svm=on,npt=on",
353                        "xlevel", 0x80000008);
354     }
355 
356     /* Test feature parsing */
357     add_feature_test("x86/cpuid/features/plus",
358                      "-cpu 486,+arat",
359                      6, 0, "EAX", 2, true);
360     add_feature_test("x86/cpuid/features/minus",
361                      "-cpu pentium,-mmx",
362                      1, 0, "EDX", 23, false);
363     add_feature_test("x86/cpuid/features/on",
364                      "-cpu 486,arat=on",
365                      6, 0, "EAX", 2, true);
366     add_feature_test("x86/cpuid/features/off",
367                      "-cpu pentium,mmx=off",
368                      1, 0, "EDX", 23, false);
369     add_feature_test("x86/cpuid/features/max-plus-invtsc",
370                      "-cpu max,+invtsc",
371                      0x80000007, 0, "EDX", 8, true);
372     add_feature_test("x86/cpuid/features/max-invtsc-on",
373                      "-cpu max,invtsc=on",
374                      0x80000007, 0, "EDX", 8, true);
375     add_feature_test("x86/cpuid/features/max-minus-mmx",
376                      "-cpu max,-mmx",
377                      1, 0, "EDX", 23, false);
378     add_feature_test("x86/cpuid/features/max-invtsc-on,mmx=off",
379                      "-cpu max,mmx=off",
380                      1, 0, "EDX", 23, false);
381 
382     return g_test_run();
383 }
384