From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from CY3PR05CU001.outbound.protection.outlook.com (mail-westcentralusazon11013049.outbound.protection.outlook.com [40.93.201.49]) (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 4D3DB3AC0FA for ; Mon, 27 Apr 2026 15:52:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.93.201.49 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777305140; cv=fail; b=XMJqntqAwZJTrv4JLVmjrQmW4KASkcAeysHCoB5cJdMQwl4SBh4a3ZRLqqPbxrMDjGuu330PZRQhaaq5rNfBUdKM/MQTCglkILvMedbfTaRuZPX3ss9tF6zrCxm2uV5VukAm+im3FWV1n8wWE0Dkn0UsWmmlgCHEfq9SLsbq0Jw= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777305140; c=relaxed/simple; bh=qdThsncU3dnHZ5TnWKzS+5xbW8UuRq8rKvXmYMO6MGk=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=S+GeV0T1zUYVWl97RmdHCw3XCc1GZ9Ma5jAJ9E8ZuTu33XvHryEdAlrYxtcbJEuNb3jRpij76DjeXUwMHhtRHeQjWZUPTzcTrq/advFpnZo4q6V0IdfOZDO115MKIBc8lYr/Ymp5FKyF1aKNrBby0nhn3ux9+ETyHl5rI9UsWnk= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com; spf=fail smtp.mailfrom=amd.com; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b=loWH8HIy; arc=fail smtp.client-ip=40.93.201.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amd.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=amd.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amd.com header.i=@amd.com header.b="loWH8HIy" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=hPfvVWcu5+Nti2gbXJpjXv4kyQdiFLAW/ZmdUyC/FMMSmWhuaFC3oFQ00D+bWBfYpD/3Y7lu6I5V/NN7ARSkojJj15rG5G96onyUtqWiFucn5ajgeICxLv5leYl7cXMnL0GQTO3XEkV2xhVhraEM5KpHOnF27e3qZIAKoysYkguXVIJodRIgODewx2s4WdxQ4J8XDsTBAKW894mbdJjon0VAag40KYUL4CXTXHB1DqL6z3d3sX43MoBhWDLSLLAlmj8dX0FS79iKSCHa+GHK0LFvFCcT2OkF4mbYbES2YqpZYVefzMyrLFJ4HPutEmOJjLIl7Hph/FmU6KsCovb1jw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=Jye57UBABz4HQurWiqkiCM6y0TqHC6RW9Yn54BRGzBU=; b=ca4cUrbDMaZFbtM5YXpI17WGDNNJNBHxkIwBvFeq2lfL/UMtqZ2znHfML7aHRECP8bGpxGwy2/OKxxmtZ2yccoPSKCJdFI/DgdPtHQhS7UBijb3xJsIZ9yWXfOMmWGyoM8RfqLnlqdbvppnghB3nvdmnLtG67a2Yzr5xgC/oo3n40qGNn6J3ZH2AoxHXtzIy6eE4XP4Za6FpGFaXbYppVkTf6u0h0rNfGJKykpPbhaKs6YRAMOmBIuk1cgQ7KvM+6QmiPlkoyoeYALqCiZ1Ewv5BqP18WKPbpiAk/x+N1qVS6KZiin5Kc3gqPSizBXe6159ioDwtfgft6XVWR9Fyfg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=linux.intel.com smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Jye57UBABz4HQurWiqkiCM6y0TqHC6RW9Yn54BRGzBU=; b=loWH8HIy/CZh3zFxE0LiRr9xaDfDU3EckL7HX+9GVSwBCI3/YPyh5X47o4ZeNMtNyTss9knMLpRN1XpAZKN0b49ioHUgGlRqE/X86OXeA2dlX/ljyP0GMZTd+Ip74bIPWU5cPVSlaWJYl61reYrqRT2oZ4CxGJrzz4t6MIovuJs= Received: from BN9PR03CA0129.namprd03.prod.outlook.com (2603:10b6:408:fe::14) by SA6PR12MB999200.namprd12.prod.outlook.com (2603:10b6:806:450::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9846.26; Mon, 27 Apr 2026 15:52:14 +0000 Received: from BL6PEPF00022572.namprd02.prod.outlook.com (2603:10b6:408:fe:cafe::44) by BN9PR03CA0129.outlook.office365.com (2603:10b6:408:fe::14) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.9846.26 via Frontend Transport; Mon, 27 Apr 2026 15:52:13 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; 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=satlexmb07.amd.com; pr=C Received: from satlexmb07.amd.com (165.204.84.17) by BL6PEPF00022572.mail.protection.outlook.com (10.167.249.40) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9846.18 via Frontend Transport; Mon, 27 Apr 2026 15:52:13 +0000 Received: from dcsm-trdripper1.amd.com (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Mon, 27 Apr 2026 10:52:08 -0500 From: Muralidhara M K To: , , CC: , , , Muralidhara M K , Muthusamy Ramalingam Subject: [PATCH v2 7/7] platform/x86/amd/hsmp: Support SYSFS_HUGE_BIN_FILE for metric table reads Date: Mon, 27 Apr 2026 21:21:29 +0530 Message-ID: <20260427155129.545327-8-muralidhara.mk@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260427155129.545327-1-muralidhara.mk@amd.com> References: <20260427155129.545327-1-muralidhara.mk@amd.com> Precedence: bulk X-Mailing-List: driver-core@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: satlexmb08.amd.com (10.181.42.217) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF00022572:EE_|SA6PR12MB999200:EE_ X-MS-Office365-Filtering-Correlation-Id: cd4b1e5c-ac8a-40b3-de0b-08dea474f352 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|376014|36860700016|56012099003|22082099003|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(1800799024)(82310400026)(376014)(36860700016)(56012099003)(22082099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 2b8GxxF51IBjnERSjM85iOfW5fNwdgxSWN7sz4NpYg+NGcH+FBPTJ4nEdiBwF6sTKZQNEUD3i40tXd4sij4DQk2zWXybxkQIrbcIT8J1110cujF5KlmzEclzAgippX3t1REbnuck7NRWZ4D0cJcxLC3Jvw1cvwNTZLPTZLN14MNbP5PoFjD8KpsbCzsBMpSh5/6kzRv2zAosrMV14WBJ0OEtjS9yhnbnqmkQ1MqgV+0FF6YVXvTOYsnntJTUd19PEBXAyhAZdhWe2W3yeOKWyrc+tb1ROxsigRejtCPObTaWPny+qmZPGgX3JPNeaVc6V0xd6Eqzaylx0K6sT56w0VDZCVUj1lUKpa+kwpdLYBvUpXbAfKO73YC/5Ji4GvmIDWfdB8khZCc02XRFzJwkn5GStM8nUlzEtYoYu2giVADZ2B44pz3eOWrnL387fR6e X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Apr 2026 15:52:13.8191 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: cd4b1e5c-ac8a-40b3-de0b-08dea474f352 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=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF00022572.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA6PR12MB999200 The metric table for Family 1Ah Model 50h-5Fh (hsmp_metric_table_zen6) is approximately 13KB, exceeding the PAGE_SIZE (4KB) cap imposed by the standard sysfs binary attribute read path. Set the SYSFS_HUGE_BIN_FILE flag in the bin_attribute mode for the metric table in both acpi.c and plat.c so that reads are routed through seq_file, which dynamically grows its buffer to accommodate the full table. This lets userspace read the entire table in a single read() call. Drop the static .size initializer from the bin_attribute since the bin_size callback (added in the previous patch) already provides the runtime table size at sysfs group registration time. Co-developed-by: Muthusamy Ramalingam Signed-off-by: Muthusamy Ramalingam Signed-off-by: Muralidhara M K --- Changes v1->v2: New patch drivers/platform/x86/amd/hsmp/acpi.c | 3 +-- drivers/platform/x86/amd/hsmp/plat.c | 6 ++++-- 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/platform/x86/amd/hsmp/acpi.c b/drivers/platform/x86/amd/hsmp/acpi.c index f3cfc99ef73d..ea99625d0f36 100644 --- a/drivers/platform/x86/amd/hsmp/acpi.c +++ b/drivers/platform/x86/amd/hsmp/acpi.c @@ -513,9 +513,8 @@ static int init_acpi(struct device *dev) } static const struct bin_attribute hsmp_metric_tbl_attr = { - .attr = { .name = HSMP_METRICS_TABLE_NAME, .mode = 0444}, + .attr = { .name = HSMP_METRICS_TABLE_NAME, .mode = SYSFS_HUGE_BIN_FILE | 0444}, .read = hsmp_metric_tbl_acpi_read, - .size = sizeof(struct hsmp_metric_table), }; static const struct bin_attribute *hsmp_attr_list[] = { diff --git a/drivers/platform/x86/amd/hsmp/plat.c b/drivers/platform/x86/amd/hsmp/plat.c index d8dd90dfeb4e..625602a0d44c 100644 --- a/drivers/platform/x86/amd/hsmp/plat.c +++ b/drivers/platform/x86/amd/hsmp/plat.c @@ -97,10 +97,12 @@ static_assert(MAX_AMD_NUM_NODES == 8); #define HSMP_BIN_ATTR(index, _list) \ static const struct bin_attribute attr##index = { \ - .attr = { .name = HSMP_METRICS_TABLE_NAME, .mode = 0444}, \ + .attr = { \ + .name = HSMP_METRICS_TABLE_NAME, \ + .mode = SYSFS_HUGE_BIN_FILE | 0444, \ + }, \ .private = (void *)index, \ .read = hsmp_metric_tbl_plat_read, \ - .size = sizeof(struct hsmp_metric_table), \ }; \ static const struct bin_attribute _list[] = { \ &attr##index, \ -- 2.34.1