From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 631BE30E0D1; Fri, 12 Sep 2025 13:41:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.176.79.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757684515; cv=none; b=esthYOeE9364TzVMcqHADVdz0/f+onLL/VvMKVmZHpvN6zmHTkcDQeKCdb9SgSBxPtSTeyhYBrhQdQeZH1RPXlxrLAwbQ3ANaqdYkgaokURrfy3aVfapJMdNSYdpAVH725JL4Ko3I1GhqrGNARfrjTTc5jmzCp3yc5aHqfp9XNc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757684515; c=relaxed/simple; bh=Ocmw6Ujc46HuI0Xl6UtjgJYAp/3YH6otYCdcydvbHqk=; h=Date:From:To:CC:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=O247bbbemjBBs+6bJya7eI3Jd3BtuIzs1aoIZAuawonQjpMhZeReH06CYRdMCCD6vmzzit0oBFsxJRD5anihqhzAT1b/6LFJLB/HGoxjsj468hvJrpVijkXAyOwN6WmmEnsxpfzgWPFHa9RkVQzPJTMDeuM5j4ILxDD+1RKN3s4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=185.176.79.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.186.31]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4cNbCh5njzz6GDH2; Fri, 12 Sep 2025 21:40:32 +0800 (CST) Received: from frapeml500008.china.huawei.com (unknown [7.182.85.71]) by mail.maildlp.com (Postfix) with ESMTPS id 0E4541401F4; Fri, 12 Sep 2025 21:41:51 +0800 (CST) Received: from localhost (10.203.177.15) by frapeml500008.china.huawei.com (7.182.85.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Fri, 12 Sep 2025 15:41:49 +0200 Date: Fri, 12 Sep 2025 14:41:48 +0100 From: Jonathan Cameron To: James Morse CC: , , , D Scott Phillips OS , , , , , , Jamie Iles , Xin Hao , , , , David Hildenbrand , Dave Martin , Koba Ko , Shanker Donthineni , , , Rob Herring , Rohit Mathew , "Rafael Wysocki" , Len Brown , Lorenzo Pieralisi , Hanjun Guo , Sudeep Holla , Catalin Marinas , "Will Deacon" , Greg Kroah-Hartman , Danilo Krummrich Subject: Re: [PATCH v2 29/29] arm_mpam: Add kunit tests for props_mismatch() Message-ID: <20250912144148.00003204@huawei.com> In-Reply-To: <20250910204309.20751-30-james.morse@arm.com> References: <20250910204309.20751-1-james.morse@arm.com> <20250910204309.20751-30-james.morse@arm.com> X-Mailer: Claws Mail 4.3.0 (GTK 3.24.42; x86_64-w64-mingw32) Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: lhrpeml100011.china.huawei.com (7.191.174.247) To frapeml500008.china.huawei.com (7.182.85.71) On Wed, 10 Sep 2025 20:43:09 +0000 James Morse wrote: > 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 Nice in general though I didn't go through the test expected results etc. A few comments inline. Thanks and looking forward to seeing this go in. Jonathan > --- > Changes since v1: > * Waggled some words in comments. > * Moved a bunch of variables to be global - shuts up a compiler warning. > --- > drivers/resctrl/mpam_internal.h | 8 +- > drivers/resctrl/test_mpam_devices.c | 321 ++++++++++++++++++++++++++++ > 2 files changed, 328 insertions(+), 1 deletion(-) > > diff --git a/drivers/resctrl/mpam_internal.h b/drivers/resctrl/mpam_internal.h > index 7cbcafe8294a..6119e4573187 100644 > --- a/drivers/resctrl/mpam_internal.h > +++ b/drivers/resctrl/mpam_internal.h > @@ -20,6 +20,12 @@ > > DECLARE_STATIC_KEY_FALSE(mpam_enabled); > > +#ifdef CONFIG_MPAM_KUNIT_TEST > +#define PACKED_FOR_KUNIT __packed > +#else > +#define PACKED_FOR_KUNIT > +#endif > + > static inline bool mpam_is_enabled(void) > { > return static_branch_likely(&mpam_enabled); > @@ -189,7 +195,7 @@ struct mpam_props { > u16 dspri_wd; > u16 num_csu_mon; > u16 num_mbwu_mon; > -}; > +} PACKED_FOR_KUNIT; Add a comment on 'why'. > > #define mpam_has_feature(_feat, x) ((1 << (_feat)) & (x)->features) > > diff --git a/drivers/resctrl/test_mpam_devices.c b/drivers/resctrl/test_mpam_devices.c > index 3e7058f7601c..4eca8590c691 100644 > --- a/drivers/resctrl/test_mpam_devices.c > +++ b/drivers/resctrl/test_mpam_devices.c > @@ -4,6 +4,325 @@ > > #include > > +/* > + * This test catches fields that aren't being sanitised - but can't tell you > + * which one... > + */ > +static void test__props_mismatch(struct kunit *test) > +{ > + struct mpam_props parent = { 0 }; > + struct mpam_props child; > + > + memset(&child, 0xff, sizeof(child)); > + __props_mismatch(&parent, &child, false); > + > + memset(&child, 0, sizeof(child)); > + KUNIT_EXPECT_EQ(test, memcmp(&parent, &child, sizeof(child)), 0); > + > + memset(&child, 0xff, sizeof(child)); > + __props_mismatch(&parent, &child, true); > + > + KUNIT_EXPECT_EQ(test, memcmp(&parent, &child, sizeof(child)), 0); > +} > + > +static struct list_head fake_classes_list; > +static struct mpam_class fake_class = { 0 }; > +static struct mpam_component fake_comp1 = { 0 }; > +static struct mpam_component fake_comp2 = { 0 }; > +static struct mpam_vmsc fake_vmsc1 = { 0 }; > +static struct mpam_vmsc fake_vmsc2 = { 0 }; > +static struct mpam_msc fake_msc1 = { 0 }; > +static struct mpam_msc fake_msc2 = { 0 }; > +static struct mpam_msc_ris fake_ris1 = { 0 }; > +static struct mpam_msc_ris fake_ris2 = { 0 }; > +static struct platform_device fake_pdev = { 0 }; > + > +static void test_mpam_enable_merge_features(struct kunit *test) > +{ > +#define RESET_FAKE_HIEARCHY() do { \ > + INIT_LIST_HEAD(&fake_classes_list); \ > + \ > + memset(&fake_class, 0, sizeof(fake_class)); \ Maybe just use a function? Seems to be changing stuff that is global mostly anyway so seems like it won't need large numbers of parameters or anything like that. > + fake_class.level = 3; \ > + fake_class.type = MPAM_CLASS_CACHE; \ > + INIT_LIST_HEAD_RCU(&fake_class.components); \ > + INIT_LIST_HEAD(&fake_class.classes_list); \ > + \ > + memset(&fake_comp1, 0, sizeof(fake_comp1)); \ > + memset(&fake_comp2, 0, sizeof(fake_comp2)); \ > + fake_comp1.comp_id = 1; \ > + fake_comp2.comp_id = 2; \ > + INIT_LIST_HEAD(&fake_comp1.vmsc); \ > + INIT_LIST_HEAD(&fake_comp1.class_list); \ > + INIT_LIST_HEAD(&fake_comp2.vmsc); \ > + INIT_LIST_HEAD(&fake_comp2.class_list); \ > + \ > + memset(&fake_vmsc1, 0, sizeof(fake_vmsc1)); \ > + memset(&fake_vmsc2, 0, sizeof(fake_vmsc2)); \ > + INIT_LIST_HEAD(&fake_vmsc1.ris); \ > + INIT_LIST_HEAD(&fake_vmsc1.comp_list); \ > + fake_vmsc1.msc = &fake_msc1; \ > + INIT_LIST_HEAD(&fake_vmsc2.ris); \ > + INIT_LIST_HEAD(&fake_vmsc2.comp_list); \ > + fake_vmsc2.msc = &fake_msc2; \ > + \ > + memset(&fake_ris1, 0, sizeof(fake_ris1)); \ > + memset(&fake_ris2, 0, sizeof(fake_ris2)); \ > + fake_ris1.ris_idx = 1; \ > + INIT_LIST_HEAD(&fake_ris1.msc_list); \ > + fake_ris2.ris_idx = 2; \ > + INIT_LIST_HEAD(&fake_ris2.msc_list); \ > + \ > + fake_msc1.pdev = &fake_pdev; \ > + fake_msc2.pdev = &fake_pdev; \ > + \ > + list_add(&fake_class.classes_list, &fake_classes_list); \ > +} while (0) > + > + RESET_FAKE_HIEARCHY(); > + > + mutex_lock(&mpam_list_lock); > + > + /* One Class+Comp, two RIS in one vMSC with common features */ > + fake_comp1.class = &fake_class; > + list_add(&fake_comp1.class_list, &fake_class.components); > + fake_comp2.class = NULL; > + fake_vmsc1.comp = &fake_comp1; > + list_add(&fake_vmsc1.comp_list, &fake_comp1.vmsc); > + fake_vmsc2.comp = NULL; > + fake_ris1.vmsc = &fake_vmsc1; > + list_add(&fake_ris1.vmsc_list, &fake_vmsc1.ris); > + fake_ris2.vmsc = &fake_vmsc1; > + list_add(&fake_ris2.vmsc_list, &fake_vmsc1.ris); > + > + mpam_set_feature(mpam_feat_cpor_part, &fake_ris1.props); > + mpam_set_feature(mpam_feat_cpor_part, &fake_ris2.props); > + fake_ris1.props.cpbm_wd = 4; > + fake_ris2.props.cpbm_wd = 4; > + > + mpam_enable_merge_features(&fake_classes_list); > + > + KUNIT_EXPECT_TRUE(test, mpam_has_feature(mpam_feat_cpor_part, &fake_class.props)); > + KUNIT_EXPECT_EQ(test, fake_class.props.cpbm_wd, 4); > + > + RESET_FAKE_HIEARCHY();