mirror of https://github.com/torvalds/linux.git
390 lines
13 KiB
C
390 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2025 Arm Ltd.
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/* This file is intended to be included into mpam_devices.c */
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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)
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{
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char __iomem *buf = kunit_kzalloc(test, SZ_16K, GFP_KERNEL);
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struct mpam_msc fake_msc = {};
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u32 *test_result;
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if (!buf)
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return;
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fake_msc.mapped_hwpage = buf;
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fake_msc.mapped_hwpage_sz = SZ_16K;
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cpumask_copy(&fake_msc.accessibility, cpu_possible_mask);
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/* Satisfy lockdep checks */
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mutex_init(&fake_msc.part_sel_lock);
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mutex_lock(&fake_msc.part_sel_lock);
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test_result = (u32 *)(buf + MPAMCFG_CPBM);
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mpam_reset_msc_bitmap(&fake_msc, MPAMCFG_CPBM, 0);
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KUNIT_EXPECT_EQ(test, test_result[0], 0);
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KUNIT_EXPECT_EQ(test, test_result[1], 0);
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test_result[0] = 0;
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test_result[1] = 0;
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mpam_reset_msc_bitmap(&fake_msc, MPAMCFG_CPBM, 1);
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KUNIT_EXPECT_EQ(test, test_result[0], 1);
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KUNIT_EXPECT_EQ(test, test_result[1], 0);
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test_result[0] = 0;
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test_result[1] = 0;
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mpam_reset_msc_bitmap(&fake_msc, MPAMCFG_CPBM, 16);
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KUNIT_EXPECT_EQ(test, test_result[0], 0xffff);
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KUNIT_EXPECT_EQ(test, test_result[1], 0);
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test_result[0] = 0;
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test_result[1] = 0;
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mpam_reset_msc_bitmap(&fake_msc, MPAMCFG_CPBM, 32);
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KUNIT_EXPECT_EQ(test, test_result[0], 0xffffffff);
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KUNIT_EXPECT_EQ(test, test_result[1], 0);
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test_result[0] = 0;
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test_result[1] = 0;
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mpam_reset_msc_bitmap(&fake_msc, MPAMCFG_CPBM, 33);
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KUNIT_EXPECT_EQ(test, test_result[0], 0xffffffff);
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KUNIT_EXPECT_EQ(test, test_result[1], 1);
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test_result[0] = 0;
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test_result[1] = 0;
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mutex_unlock(&fake_msc.part_sel_lock);
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}
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static struct kunit_case mpam_devices_test_cases[] = {
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KUNIT_CASE(test_mpam_reset_msc_bitmap),
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KUNIT_CASE(test_mpam_enable_merge_features),
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KUNIT_CASE(test__props_mismatch),
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{}
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};
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static struct kunit_suite mpam_devices_test_suite = {
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.name = "mpam_devices_test_suite",
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.test_cases = mpam_devices_test_cases,
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};
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kunit_test_suites(&mpam_devices_test_suite);
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