discovery-kunit.c

  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
 18static void
 19validate_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
 53static void linebreak(struct kunit *test)
 54{
 55	kunit_info(test, "*****************************************************************************\n");
 56}
 57
 58static 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
101static struct kunit_case intel_pmt_discovery_test_cases[] = {
102	KUNIT_CASE(test_intel_pmt_get_regions_by_feature),
103	{}
104};
105
106static struct kunit_suite intel_pmt_discovery_test_suite = {
107	.name = "pmt_discovery_test",
108	.test_cases = intel_pmt_discovery_test_cases,
109};
110
111kunit_test_suite(intel_pmt_discovery_test_suite);
112
113MODULE_IMPORT_NS("INTEL_PMT_DISCOVERY");
114MODULE_AUTHOR("David E. Box <david.e.box@linux.intel.com>");
115MODULE_DESCRIPTION("Intel PMT Discovery KUNIT test driver");
116MODULE_LICENSE("GPL");