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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=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CH2PEPF0000013D.mail.protection.outlook.com (10.167.244.69) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8158.14 via Frontend Transport; Tue, 12 Nov 2024 17:03:31 +0000 Received: from jatayu.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Tue, 12 Nov 2024 11:03:27 -0600 From: Basavaraj Natikar To: , , CC: , , , , Basavaraj Natikar Subject: [PATCH v6 2/2] platform/x86/amd: amd_3d_vcache: Add sysfs ABI documentation Date: Tue, 12 Nov 2024 22:33:07 +0530 Message-ID: <20241112170307.3745777-3-Basavaraj.Natikar@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241112170307.3745777-1-Basavaraj.Natikar@amd.com> References: <20241112170307.3745777-1-Basavaraj.Natikar@amd.com> Precedence: bulk X-Mailing-List: platform-driver-x86@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PEPF0000013D:EE_|PH7PR12MB6562:EE_ X-MS-Office365-Filtering-Correlation-Id: 9cbfa524-9868-4fc8-8734-08dd033beffe X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|1800799024|36860700013; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Nov 2024 17:03:31.9930 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9cbfa524-9868-4fc8-8734-08dd033beffe 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH2PEPF0000013D.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB6562 Add documentation for the amd_3d_vcache sysfs bus platform driver interface so that userspace applications can use it to change mode preferences, either frequency or cache. Co-developed-by: Perry Yuan Signed-off-by: Perry Yuan Co-developed-by: Mario Limonciello Signed-off-by: Mario Limonciello Reviewed-by: Shyam Sundar S K Reviewed-by: Armin Wolf Reviewed-by: Ilpo Järvinen Signed-off-by: Basavaraj Natikar --- .../sysfs-bus-platform-drivers-amd_x3d_vcache | 12 ++++++++++++ MAINTAINERS | 1 + 2 files changed, 13 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-platform-drivers-amd_x3d_vcache diff --git a/Documentation/ABI/testing/sysfs-bus-platform-drivers-amd_x3d_vcache b/Documentation/ABI/testing/sysfs-bus-platform-drivers-amd_x3d_vcache new file mode 100644 index 000000000000..ac3431736f5c --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-platform-drivers-amd_x3d_vcache @@ -0,0 +1,12 @@ +What: /sys/bus/platform/drivers/amd_x3d_vcache/AMDI0101:00/amd_x3d_mode +Date: November 2024 +KernelVersion: 6.13 +Contact: Basavaraj Natikar +Description: (RW) AMD 3D V-Cache optimizer allows users to switch CPU core + rankings dynamically. + + This file switches between these two modes: + - "frequency" cores within the faster CCD are prioritized before + those in the slower CCD. + - "cache" cores within the larger L3 CCD are prioritized before + those in the smaller L3 CCD. diff --git a/MAINTAINERS b/MAINTAINERS index 087d76c1f6bb..d9f3d7fa8db9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -971,6 +971,7 @@ M: Basavaraj Natikar R: Mario Limonciello L: platform-driver-x86@vger.kernel.org S: Supported +F: Documentation/ABI/testing/sysfs-bus-platform-drivers-amd_x3d_vcache F: drivers/platform/x86/amd/x3d_vcache.c AMD ADDRESS TRANSLATION LIBRARY (ATL)