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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB03.amd.com; pr=C Received: from SATLEXMB03.amd.com (165.204.84.17) by SJ5PEPF000001D6.mail.protection.outlook.com (10.167.242.58) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7918.13 via Frontend Transport; Wed, 4 Sep 2024 22:23:24 +0000 Received: from bmoger-ubuntu.amd.com (10.180.168.240) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Wed, 4 Sep 2024 17:23:23 -0500 From: Babu Moger To: , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v7 12/24] x86/resctrl: Introduce mbm_cntr_map to track counters at domain Date: Wed, 4 Sep 2024 17:21:27 -0500 Message-ID: <7a24bb182897acab3daaac1cadaabca3bcc73dc5.1725488488.git.babu.moger@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB03.amd.com (10.181.40.144) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ5PEPF000001D6:EE_|DS7PR12MB8274:EE_ X-MS-Office365-Filtering-Correlation-Id: 2e785aca-a875-4e76-63c3-08dccd30316d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|376014|7416014|82310400026|1800799024; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Sep 2024 22:23:24.9738 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2e785aca-a875-4e76-63c3-08dccd30316d X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ5PEPF000001D6.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB8274 Content-Type: text/plain; charset="utf-8" The MBM counters are allocated globally and assigned to RMID, event pair in a resctrl group. It is tracked by mbm_cntr_free_map. Then it is assigned to the domain based on the user input. It needs to be tracked at domain level also. Add the mbm_cntr_map bitmap in struct rdt_mon_domain to keep track of assignment at domain level. The global counter at mbm_cntr_free_map can be released when assignment at all the domains are cleared. Signed-off-by: Babu Moger --- v7: Added check mbm_cntr_assignable for allocating bitmap mbm_cntr_map v6: New patch to add domain level assignment. --- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 10 ++++++++++ include/linux/resctrl.h | 2 ++ 2 files changed, 12 insertions(+) diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/r= esctrl/rdtgroup.c index cc101fbe8683..a014d5f4c0b3 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -4092,6 +4092,7 @@ static void __init rdtgroup_setup_default(void) =20 static void domain_destroy_mon_state(struct rdt_mon_domain *d) { + bitmap_free(d->mbm_cntr_map); bitmap_free(d->rmid_busy_llc); kfree(d->mbm_total); kfree(d->mbm_local); @@ -4165,6 +4166,15 @@ static int domain_setup_mon_state(struct rdt_resourc= e *r, struct rdt_mon_domain return -ENOMEM; } } + if (is_mbm_enabled() && r->mon.mbm_cntr_assignable) { + d->mbm_cntr_map =3D bitmap_zalloc(r->mon.num_mbm_cntrs, GFP_KERNEL); + if (!d->mbm_cntr_map) { + bitmap_free(d->rmid_busy_llc); + kfree(d->mbm_total); + kfree(d->mbm_local); + return -ENOMEM; + } + } =20 return 0; } diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index 757708cf5d3c..882a6ec55f27 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -105,6 +105,7 @@ struct rdt_ctrl_domain { * @cqm_limbo: worker to periodically read CQM h/w counters * @mbm_work_cpu: worker CPU for MBM h/w counters * @cqm_work_cpu: worker CPU for CQM h/w counters + * @mbm_cntr_map: bitmap to track domain counter assignment */ struct rdt_mon_domain { struct rdt_domain_hdr hdr; @@ -116,6 +117,7 @@ struct rdt_mon_domain { struct delayed_work cqm_limbo; int mbm_work_cpu; int cqm_work_cpu; + unsigned long *mbm_cntr_map; }; =20 /** --=20 2.34.1