1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Intel Platform Monitory Technology Discovery KUNIT tests
4 *
5 * Copyright (c) 2025, Intel Corporation.
6 * All Rights Reserved.
7 */
8
9 #include <kunit/test.h>
10 #include <linux/err.h>
11 #include <linux/intel_pmt_features.h>
12 #include <linux/intel_vsec.h>
13 #include <linux/module.h>
14 #include <linux/slab.h>
15
16 #define PMT_FEATURE_COUNT (FEATURE_MAX + 1)
17
18 static void
validate_pmt_regions(struct kunit * test,struct pmt_feature_group * feature_group,int feature_id)19 validate_pmt_regions(struct kunit *test, struct pmt_feature_group *feature_group, int feature_id)
20 {
21 int i;
22
23 kunit_info(test, "Feature ID %d [%s] has %d regions.\n", feature_id,
24 pmt_feature_names[feature_id], feature_group->count);
25
26 for (i = 0; i < feature_group->count; i++) {
27 struct telemetry_region *region = &feature_group->regions[i];
28
29 kunit_info(test, " - Region %d: cdie_mask=%u, package_id=%u, partition=%u, segment=%u,",
30 i, region->plat_info.cdie_mask, region->plat_info.package_id,
31 region->plat_info.partition, region->plat_info.segment);
32 kunit_info(test, "\t\tbus=%u, device=%u, function=%u, guid=0x%x,",
33 region->plat_info.bus_number, region->plat_info.device_number,
34 region->plat_info.function_number, region->guid);
35 kunit_info(test, "\t\taddr=%p, size=%zu, num_rmids=%u", region->addr, region->size,
36 region->num_rmids);
37
38
39 KUNIT_ASSERT_GE(test, region->plat_info.cdie_mask, 0);
40 KUNIT_ASSERT_GE(test, region->plat_info.package_id, 0);
41 KUNIT_ASSERT_GE(test, region->plat_info.partition, 0);
42 KUNIT_ASSERT_GE(test, region->plat_info.segment, 0);
43 KUNIT_ASSERT_GE(test, region->plat_info.bus_number, 0);
44 KUNIT_ASSERT_GE(test, region->plat_info.device_number, 0);
45 KUNIT_ASSERT_GE(test, region->plat_info.function_number, 0);
46
47 KUNIT_ASSERT_NE(test, region->guid, 0);
48
49 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, (__force const void *)region->addr);
50 }
51 }
52
linebreak(struct kunit * test)53 static void linebreak(struct kunit *test)
54 {
55 kunit_info(test, "*****************************************************************************\n");
56 }
57
test_intel_pmt_get_regions_by_feature(struct kunit * test)58 static void test_intel_pmt_get_regions_by_feature(struct kunit *test)
59 {
60 struct pmt_feature_group *feature_group;
61 int num_available = 0;
62 int feature_id;
63
64 /* Iterate through all possible feature IDs */
65 for (feature_id = 1; feature_id < PMT_FEATURE_COUNT; feature_id++, linebreak(test)) {
66 const char *name;
67
68 if (!pmt_feature_id_is_valid(feature_id))
69 continue;
70
71 name = pmt_feature_names[feature_id];
72
73 feature_group = intel_pmt_get_regions_by_feature(feature_id);
74 if (IS_ERR(feature_group)) {
75 if (PTR_ERR(feature_group) == -ENOENT)
76 kunit_warn(test, "intel_pmt_get_regions_by_feature() reporting feature %d [%s] is not present.\n",
77 feature_id, name);
78 else
79 kunit_warn(test, "intel_pmt_get_regions_by_feature() returned error %ld while attempt to lookup %d [%s].\n",
80 PTR_ERR(feature_group), feature_id, name);
81
82 continue;
83 }
84
85 if (!feature_group) {
86 kunit_warn(test, "Feature ID %d: %s is not available.\n", feature_id, name);
87 continue;
88 }
89
90 num_available++;
91
92 validate_pmt_regions(test, feature_group, feature_id);
93
94 intel_pmt_put_feature_group(feature_group);
95 }
96
97 if (num_available == 0)
98 kunit_warn(test, "No PMT region groups were available for any feature ID (0-10).\n");
99 }
100
101 static struct kunit_case intel_pmt_discovery_test_cases[] = {
102 KUNIT_CASE(test_intel_pmt_get_regions_by_feature),
103 {}
104 };
105
106 static struct kunit_suite intel_pmt_discovery_test_suite = {
107 .name = "pmt_discovery_test",
108 .test_cases = intel_pmt_discovery_test_cases,
109 };
110
111 kunit_test_suite(intel_pmt_discovery_test_suite);
112
113 MODULE_IMPORT_NS("INTEL_PMT_DISCOVERY");
114 MODULE_AUTHOR("David E. Box <david.e.box@linux.intel.com>");
115 MODULE_DESCRIPTION("Intel PMT Discovery KUNIT test driver");
116 MODULE_LICENSE("GPL");
117