mirror of https://github.com/torvalds/linux.git
arm_mpam: Add kunit tests for props_mismatch()
When features are mismatched between MSC the way features are combined to the class determines whether resctrl can support this SoC. Add some tests to illustrate the sort of thing that is expected to work, and those that must be removed. Signed-off-by: James Morse <james.morse@arm.com> Reviewed-by: Ben Horgan <ben.horgan@arm.com> Reviewed-by: Fenghua Yu <fenghuay@nvidia.com> Reviewed-by: Gavin Shan <gshan@redhat.com> Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com> Tested-by: Fenghua Yu <fenghuay@nvidia.com> Tested-by: Carl Worth <carl@os.amperecomputing.com> Tested-by: Gavin Shan <gshan@redhat.com> Tested-by: Zeng Heng <zengheng4@huawei.com> Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com> Tested-by: Hanjun Guo <guohanjun@huawei.com> Signed-off-by: Ben Horgan <ben.horgan@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
James Morse
Catalin Marinas
parent
e3565d1fd4
commit
2557e0eafe
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@ -23,6 +23,12 @@ struct platform_device;
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DECLARE_STATIC_KEY_FALSE(mpam_enabled);
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#ifdef CONFIG_MPAM_KUNIT_TEST
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#define PACKED_FOR_KUNIT __packed
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#else
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#define PACKED_FOR_KUNIT
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#endif
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static inline bool mpam_is_enabled(void)
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{
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return static_branch_likely(&mpam_enabled);
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@ -186,7 +192,13 @@ struct mpam_props {
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u16 dspri_wd;
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u16 num_csu_mon;
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u16 num_mbwu_mon;
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};
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/*
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* Kunit tests use memset() to set up feature combinations that should be
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* removed, and will false-positive if the compiler introduces padding that
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* isn't cleared during sanitisation.
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*/
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} PACKED_FOR_KUNIT;
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#define mpam_has_feature(_feat, x) test_bit(_feat, (x)->features)
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#define mpam_set_feature(_feat, x) set_bit(_feat, (x)->features)
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@ -4,6 +4,324 @@
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#include <kunit/test.h>
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/*
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* This test catches fields that aren't being sanitised - but can't tell you
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* which one...
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*/
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static void test__props_mismatch(struct kunit *test)
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{
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struct mpam_props parent = { 0 };
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struct mpam_props child;
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memset(&child, 0xff, sizeof(child));
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__props_mismatch(&parent, &child, false);
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memset(&child, 0, sizeof(child));
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KUNIT_EXPECT_EQ(test, memcmp(&parent, &child, sizeof(child)), 0);
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memset(&child, 0xff, sizeof(child));
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__props_mismatch(&parent, &child, true);
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KUNIT_EXPECT_EQ(test, memcmp(&parent, &child, sizeof(child)), 0);
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}
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static struct list_head fake_classes_list;
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static struct mpam_class fake_class = { 0 };
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static struct mpam_component fake_comp1 = { 0 };
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static struct mpam_component fake_comp2 = { 0 };
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static struct mpam_vmsc fake_vmsc1 = { 0 };
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static struct mpam_vmsc fake_vmsc2 = { 0 };
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static struct mpam_msc fake_msc1 = { 0 };
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static struct mpam_msc fake_msc2 = { 0 };
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static struct mpam_msc_ris fake_ris1 = { 0 };
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static struct mpam_msc_ris fake_ris2 = { 0 };
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static struct platform_device fake_pdev = { 0 };
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static inline void reset_fake_hierarchy(void)
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{
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INIT_LIST_HEAD(&fake_classes_list);
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memset(&fake_class, 0, sizeof(fake_class));
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fake_class.level = 3;
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fake_class.type = MPAM_CLASS_CACHE;
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INIT_LIST_HEAD_RCU(&fake_class.components);
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INIT_LIST_HEAD(&fake_class.classes_list);
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memset(&fake_comp1, 0, sizeof(fake_comp1));
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memset(&fake_comp2, 0, sizeof(fake_comp2));
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fake_comp1.comp_id = 1;
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fake_comp2.comp_id = 2;
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INIT_LIST_HEAD(&fake_comp1.vmsc);
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INIT_LIST_HEAD(&fake_comp1.class_list);
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INIT_LIST_HEAD(&fake_comp2.vmsc);
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INIT_LIST_HEAD(&fake_comp2.class_list);
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memset(&fake_vmsc1, 0, sizeof(fake_vmsc1));
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memset(&fake_vmsc2, 0, sizeof(fake_vmsc2));
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INIT_LIST_HEAD(&fake_vmsc1.ris);
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INIT_LIST_HEAD(&fake_vmsc1.comp_list);
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fake_vmsc1.msc = &fake_msc1;
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INIT_LIST_HEAD(&fake_vmsc2.ris);
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INIT_LIST_HEAD(&fake_vmsc2.comp_list);
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fake_vmsc2.msc = &fake_msc2;
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memset(&fake_ris1, 0, sizeof(fake_ris1));
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memset(&fake_ris2, 0, sizeof(fake_ris2));
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fake_ris1.ris_idx = 1;
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INIT_LIST_HEAD(&fake_ris1.msc_list);
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fake_ris2.ris_idx = 2;
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INIT_LIST_HEAD(&fake_ris2.msc_list);
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fake_msc1.pdev = &fake_pdev;
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fake_msc2.pdev = &fake_pdev;
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list_add(&fake_class.classes_list, &fake_classes_list);
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}
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static void test_mpam_enable_merge_features(struct kunit *test)
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{
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reset_fake_hierarchy();
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mutex_lock(&mpam_list_lock);
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/* One Class+Comp, two RIS in one vMSC with common features */
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fake_comp1.class = &fake_class;
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list_add(&fake_comp1.class_list, &fake_class.components);
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fake_comp2.class = NULL;
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fake_vmsc1.comp = &fake_comp1;
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list_add(&fake_vmsc1.comp_list, &fake_comp1.vmsc);
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fake_vmsc2.comp = NULL;
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fake_ris1.vmsc = &fake_vmsc1;
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list_add(&fake_ris1.vmsc_list, &fake_vmsc1.ris);
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fake_ris2.vmsc = &fake_vmsc1;
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list_add(&fake_ris2.vmsc_list, &fake_vmsc1.ris);
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mpam_set_feature(mpam_feat_cpor_part, &fake_ris1.props);
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mpam_set_feature(mpam_feat_cpor_part, &fake_ris2.props);
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fake_ris1.props.cpbm_wd = 4;
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fake_ris2.props.cpbm_wd = 4;
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mpam_enable_merge_features(&fake_classes_list);
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KUNIT_EXPECT_TRUE(test, mpam_has_feature(mpam_feat_cpor_part, &fake_class.props));
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KUNIT_EXPECT_EQ(test, fake_class.props.cpbm_wd, 4);
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reset_fake_hierarchy();
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/* One Class+Comp, two RIS in one vMSC with non-overlapping features */
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fake_comp1.class = &fake_class;
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list_add(&fake_comp1.class_list, &fake_class.components);
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fake_comp2.class = NULL;
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fake_vmsc1.comp = &fake_comp1;
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list_add(&fake_vmsc1.comp_list, &fake_comp1.vmsc);
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fake_vmsc2.comp = NULL;
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fake_ris1.vmsc = &fake_vmsc1;
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list_add(&fake_ris1.vmsc_list, &fake_vmsc1.ris);
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fake_ris2.vmsc = &fake_vmsc1;
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list_add(&fake_ris2.vmsc_list, &fake_vmsc1.ris);
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mpam_set_feature(mpam_feat_cpor_part, &fake_ris1.props);
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mpam_set_feature(mpam_feat_cmax_cmin, &fake_ris2.props);
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fake_ris1.props.cpbm_wd = 4;
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fake_ris2.props.cmax_wd = 4;
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mpam_enable_merge_features(&fake_classes_list);
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/* Multiple RIS within one MSC controlling the same resource can be mismatched */
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KUNIT_EXPECT_TRUE(test, mpam_has_feature(mpam_feat_cpor_part, &fake_class.props));
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KUNIT_EXPECT_TRUE(test, mpam_has_feature(mpam_feat_cmax_cmin, &fake_class.props));
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KUNIT_EXPECT_TRUE(test, mpam_has_feature(mpam_feat_cmax_cmin, &fake_vmsc1.props));
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KUNIT_EXPECT_EQ(test, fake_class.props.cpbm_wd, 4);
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KUNIT_EXPECT_EQ(test, fake_vmsc1.props.cmax_wd, 4);
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KUNIT_EXPECT_EQ(test, fake_class.props.cmax_wd, 4);
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reset_fake_hierarchy();
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/* One Class+Comp, two MSC with overlapping features */
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fake_comp1.class = &fake_class;
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list_add(&fake_comp1.class_list, &fake_class.components);
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fake_comp2.class = NULL;
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fake_vmsc1.comp = &fake_comp1;
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list_add(&fake_vmsc1.comp_list, &fake_comp1.vmsc);
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fake_vmsc2.comp = &fake_comp1;
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list_add(&fake_vmsc2.comp_list, &fake_comp1.vmsc);
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fake_ris1.vmsc = &fake_vmsc1;
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list_add(&fake_ris1.vmsc_list, &fake_vmsc1.ris);
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fake_ris2.vmsc = &fake_vmsc2;
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list_add(&fake_ris2.vmsc_list, &fake_vmsc2.ris);
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mpam_set_feature(mpam_feat_cpor_part, &fake_ris1.props);
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mpam_set_feature(mpam_feat_cpor_part, &fake_ris2.props);
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fake_ris1.props.cpbm_wd = 4;
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fake_ris2.props.cpbm_wd = 4;
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mpam_enable_merge_features(&fake_classes_list);
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KUNIT_EXPECT_TRUE(test, mpam_has_feature(mpam_feat_cpor_part, &fake_class.props));
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KUNIT_EXPECT_EQ(test, fake_class.props.cpbm_wd, 4);
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reset_fake_hierarchy();
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/* One Class+Comp, two MSC with non-overlapping features */
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fake_comp1.class = &fake_class;
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list_add(&fake_comp1.class_list, &fake_class.components);
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fake_comp2.class = NULL;
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fake_vmsc1.comp = &fake_comp1;
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list_add(&fake_vmsc1.comp_list, &fake_comp1.vmsc);
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fake_vmsc2.comp = &fake_comp1;
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list_add(&fake_vmsc2.comp_list, &fake_comp1.vmsc);
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fake_ris1.vmsc = &fake_vmsc1;
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list_add(&fake_ris1.vmsc_list, &fake_vmsc1.ris);
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fake_ris2.vmsc = &fake_vmsc2;
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list_add(&fake_ris2.vmsc_list, &fake_vmsc2.ris);
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mpam_set_feature(mpam_feat_cpor_part, &fake_ris1.props);
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mpam_set_feature(mpam_feat_cmax_cmin, &fake_ris2.props);
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fake_ris1.props.cpbm_wd = 4;
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fake_ris2.props.cmax_wd = 4;
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mpam_enable_merge_features(&fake_classes_list);
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/*
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* Multiple RIS in different MSC can't control the same resource,
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* mismatched features can not be supported.
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*/
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KUNIT_EXPECT_FALSE(test, mpam_has_feature(mpam_feat_cpor_part, &fake_class.props));
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KUNIT_EXPECT_FALSE(test, mpam_has_feature(mpam_feat_cmax_cmin, &fake_class.props));
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KUNIT_EXPECT_EQ(test, fake_class.props.cpbm_wd, 0);
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KUNIT_EXPECT_EQ(test, fake_class.props.cmax_wd, 0);
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reset_fake_hierarchy();
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/* One Class+Comp, two MSC with incompatible overlapping features */
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fake_comp1.class = &fake_class;
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list_add(&fake_comp1.class_list, &fake_class.components);
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fake_comp2.class = NULL;
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fake_vmsc1.comp = &fake_comp1;
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list_add(&fake_vmsc1.comp_list, &fake_comp1.vmsc);
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fake_vmsc2.comp = &fake_comp1;
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list_add(&fake_vmsc2.comp_list, &fake_comp1.vmsc);
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fake_ris1.vmsc = &fake_vmsc1;
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list_add(&fake_ris1.vmsc_list, &fake_vmsc1.ris);
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fake_ris2.vmsc = &fake_vmsc2;
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list_add(&fake_ris2.vmsc_list, &fake_vmsc2.ris);
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mpam_set_feature(mpam_feat_cpor_part, &fake_ris1.props);
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mpam_set_feature(mpam_feat_cpor_part, &fake_ris2.props);
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mpam_set_feature(mpam_feat_mbw_part, &fake_ris1.props);
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mpam_set_feature(mpam_feat_mbw_part, &fake_ris2.props);
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fake_ris1.props.cpbm_wd = 5;
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fake_ris2.props.cpbm_wd = 3;
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fake_ris1.props.mbw_pbm_bits = 5;
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fake_ris2.props.mbw_pbm_bits = 3;
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mpam_enable_merge_features(&fake_classes_list);
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/*
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* Multiple RIS in different MSC can't control the same resource,
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* mismatched features can not be supported.
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*/
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KUNIT_EXPECT_FALSE(test, mpam_has_feature(mpam_feat_cpor_part, &fake_class.props));
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KUNIT_EXPECT_FALSE(test, mpam_has_feature(mpam_feat_mbw_part, &fake_class.props));
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KUNIT_EXPECT_EQ(test, fake_class.props.cpbm_wd, 0);
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KUNIT_EXPECT_EQ(test, fake_class.props.mbw_pbm_bits, 0);
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reset_fake_hierarchy();
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/* One Class+Comp, two MSC with overlapping features that need tweaking */
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fake_comp1.class = &fake_class;
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list_add(&fake_comp1.class_list, &fake_class.components);
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fake_comp2.class = NULL;
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fake_vmsc1.comp = &fake_comp1;
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list_add(&fake_vmsc1.comp_list, &fake_comp1.vmsc);
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fake_vmsc2.comp = &fake_comp1;
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list_add(&fake_vmsc2.comp_list, &fake_comp1.vmsc);
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fake_ris1.vmsc = &fake_vmsc1;
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list_add(&fake_ris1.vmsc_list, &fake_vmsc1.ris);
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fake_ris2.vmsc = &fake_vmsc2;
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list_add(&fake_ris2.vmsc_list, &fake_vmsc2.ris);
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mpam_set_feature(mpam_feat_mbw_min, &fake_ris1.props);
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mpam_set_feature(mpam_feat_mbw_min, &fake_ris2.props);
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mpam_set_feature(mpam_feat_cmax_cmax, &fake_ris1.props);
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mpam_set_feature(mpam_feat_cmax_cmax, &fake_ris2.props);
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fake_ris1.props.bwa_wd = 5;
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fake_ris2.props.bwa_wd = 3;
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fake_ris1.props.cmax_wd = 5;
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fake_ris2.props.cmax_wd = 3;
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mpam_enable_merge_features(&fake_classes_list);
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/*
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* RIS with different control properties need to be sanitised so the
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* class has the common set of properties.
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*/
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KUNIT_EXPECT_TRUE(test, mpam_has_feature(mpam_feat_mbw_min, &fake_class.props));
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KUNIT_EXPECT_TRUE(test, mpam_has_feature(mpam_feat_cmax_cmax, &fake_class.props));
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KUNIT_EXPECT_EQ(test, fake_class.props.bwa_wd, 3);
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KUNIT_EXPECT_EQ(test, fake_class.props.cmax_wd, 3);
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reset_fake_hierarchy();
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/* One Class Two Comp with overlapping features */
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fake_comp1.class = &fake_class;
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list_add(&fake_comp1.class_list, &fake_class.components);
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fake_comp2.class = &fake_class;
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list_add(&fake_comp2.class_list, &fake_class.components);
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fake_vmsc1.comp = &fake_comp1;
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list_add(&fake_vmsc1.comp_list, &fake_comp1.vmsc);
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fake_vmsc2.comp = &fake_comp2;
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list_add(&fake_vmsc2.comp_list, &fake_comp2.vmsc);
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fake_ris1.vmsc = &fake_vmsc1;
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list_add(&fake_ris1.vmsc_list, &fake_vmsc1.ris);
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fake_ris2.vmsc = &fake_vmsc2;
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list_add(&fake_ris2.vmsc_list, &fake_vmsc2.ris);
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mpam_set_feature(mpam_feat_cpor_part, &fake_ris1.props);
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mpam_set_feature(mpam_feat_cpor_part, &fake_ris2.props);
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fake_ris1.props.cpbm_wd = 4;
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fake_ris2.props.cpbm_wd = 4;
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mpam_enable_merge_features(&fake_classes_list);
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KUNIT_EXPECT_TRUE(test, mpam_has_feature(mpam_feat_cpor_part, &fake_class.props));
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KUNIT_EXPECT_EQ(test, fake_class.props.cpbm_wd, 4);
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reset_fake_hierarchy();
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/* One Class Two Comp with non-overlapping features */
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fake_comp1.class = &fake_class;
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list_add(&fake_comp1.class_list, &fake_class.components);
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fake_comp2.class = &fake_class;
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list_add(&fake_comp2.class_list, &fake_class.components);
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fake_vmsc1.comp = &fake_comp1;
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list_add(&fake_vmsc1.comp_list, &fake_comp1.vmsc);
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fake_vmsc2.comp = &fake_comp2;
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list_add(&fake_vmsc2.comp_list, &fake_comp2.vmsc);
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fake_ris1.vmsc = &fake_vmsc1;
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list_add(&fake_ris1.vmsc_list, &fake_vmsc1.ris);
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fake_ris2.vmsc = &fake_vmsc2;
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list_add(&fake_ris2.vmsc_list, &fake_vmsc2.ris);
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mpam_set_feature(mpam_feat_cpor_part, &fake_ris1.props);
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mpam_set_feature(mpam_feat_cmax_cmin, &fake_ris2.props);
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fake_ris1.props.cpbm_wd = 4;
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fake_ris2.props.cmax_wd = 4;
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mpam_enable_merge_features(&fake_classes_list);
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/*
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* Multiple components can't control the same resource, mismatched features can
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* not be supported.
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*/
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KUNIT_EXPECT_FALSE(test, mpam_has_feature(mpam_feat_cpor_part, &fake_class.props));
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KUNIT_EXPECT_FALSE(test, mpam_has_feature(mpam_feat_cmax_cmin, &fake_class.props));
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KUNIT_EXPECT_EQ(test, fake_class.props.cpbm_wd, 0);
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KUNIT_EXPECT_EQ(test, fake_class.props.cmax_wd, 0);
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mutex_unlock(&mpam_list_lock);
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}
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|
||||
static void test_mpam_reset_msc_bitmap(struct kunit *test)
|
||||
{
|
||||
char __iomem *buf = kunit_kzalloc(test, SZ_16K, GFP_KERNEL);
|
||||
|
|
@ -58,6 +376,8 @@ static void test_mpam_reset_msc_bitmap(struct kunit *test)
|
|||
|
||||
static struct kunit_case mpam_devices_test_cases[] = {
|
||||
KUNIT_CASE(test_mpam_reset_msc_bitmap),
|
||||
KUNIT_CASE(test_mpam_enable_merge_features),
|
||||
KUNIT_CASE(test__props_mismatch),
|
||||
{}
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue