From nobody Sun Feb 8 18:15:38 2026 Received: from CY3PR05CU001.outbound.protection.outlook.com (mail-westcentralusazon11013058.outbound.protection.outlook.com [40.93.201.58]) (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 D87FD438FED; Tue, 20 Jan 2026 14:58:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.93.201.58 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768921133; cv=fail; b=pEI0Yp1MO6vPBJrtVDE8rhO2btzDy/fL1mnL7Nl6HYqmYRAaAfbP2RZnczR20baWvsnaaeqksxyUXCNGeoUTz3vuhjG8r8mvBDsoK6Qbh4eYr0FAh5b3iwL/MVHbQ0LGgAZqQKuhkCWzmdbY5rAOEmvNwVpjQa7rUPeIz1UfNYk= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768921133; c=relaxed/simple; bh=84mvYh1SXpB1oh2Q9wA0U5pBrTYBDlj2HDFzWrjQylc=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=uWh3/zK/pkDGmiO3PdTKNpC5vobbjECOhQoEYG9tjZyJxzxuT9MnE81Mx4ekQw1E0Y9uM1RVoTjcHGpxG5a/VkogElCTqQG24/ZD7V4WwT3kMEWFv1uZ+T8LAjen4fFfmWNoFyz/u/dPioi7WqgqoW3f8bAoF0AhaVPUeb4UcUQ= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com; spf=fail smtp.mailfrom=nvidia.com; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b=tbSzs1Ik; arc=fail smtp.client-ip=40.93.201.58 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=nvidia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b="tbSzs1Ik" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=VdkS/mArPdAsDtG6ptLlHBXvEjptdVPzd5Tlg9Dnxo4o9vM2EUiNTNhZLkc8tV3rfzKWyO7PX/FTkcwqVIaP8aY+pss2IU1YAC1cVkFNpMy9CYlkfJVQ2TLweqQCL4cO436MGYPsnrucWII+Xy/yqHSyfjVbRAwYR22HjXDiZaZXNBrOzytbEkT4QEdrKUrc/RAyrvHc1WfQGYBG3AcRraG8Iqkx0a/fIbQThiMZkaaHf2RT4WqT8zSF5FOK4TOFXwMfmATXTkW/0tvxFEuPZqDG3Ao9pjsJL9tbEc4HU/0ZM5aAP2dJRcCVqsni9JeOZDSCmEXacupkZnvfnb/KRg== 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=3hqrrdCJwqABcjLtpUyYItscknQzNs4FzJVgVR+GIio=; b=EPKnclJa6XF/Clh6lOyeU+9YClMCwStlxNdoKA5EBoxy3N0jAm3r8NtNBtlmN0CtFuggaNJfqP/jT9uo9M+pO9UPwMzbW4jY18xZ8sF6Rvz3gLzcqDauL5EDxsIF0hJ6un8QmzhqG5Pj722EN12p06MTn7DpQEKU65h9BLuPUlynbTgUe+kJKAbyxFNYk/ZP5KDHAPn6eeERuNK3ydRnqFKoAoNbZWz9fYsGlixUX1bqAij05PN5gvDR/ZH0sLLekzY0PGcFIRkTkfsH3qEiYXbQjURuG6hNyVV9dOMrYjFo6UfhTjMT/oXl1wJT66jqOCxdqy3VMyHBIHlv4DUYPQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.117.160) smtp.rcpttodomain=kernel.org smtp.mailfrom=nvidia.com; dmarc=pass (p=reject sp=reject pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=3hqrrdCJwqABcjLtpUyYItscknQzNs4FzJVgVR+GIio=; b=tbSzs1IkmQ5TaK18fPw5EK/683/vNqDXKENmDVN3I2a6mMVLTsC4b8VsdKNAWrtk5EsRlvahV+mePbpaFrPBqd+NoBdNjJZBsOSNwHfvmAPXxS1yf/1B0vqZt/3tRWqWB/qTxq7Hi6EgL/MhBos5JKM8nQU29jVk/HyzpPvLz8ek27ohl7Wd++PuQ3nB7/dB5qCuBzqp/+WqADQFdAwM9lV33z2tseDE0g81GHrDEg0x3OKxjk4JnvkWVWpYFn8EaRr2cedf3eeqKTzHt7XtQVzs2fTYi+2PPFr0NwGAt8SKZDoWWI+c39Eyj0KiIy6El4srOeibo4i87rtfQ+PJ2A== Received: from CH5P222CA0003.NAMP222.PROD.OUTLOOK.COM (2603:10b6:610:1ee::24) by DS5PPFB8FBD73EA.namprd12.prod.outlook.com (2603:10b6:f:fc00::65e) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9478.4; Tue, 20 Jan 2026 14:58:45 +0000 Received: from CH2PEPF0000014A.namprd02.prod.outlook.com (2603:10b6:610:1ee:cafe::f2) by CH5P222CA0003.outlook.office365.com (2603:10b6:610:1ee::24) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.9542.9 via Frontend Transport; Tue, 20 Jan 2026 14:58:46 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.117.160) smtp.mailfrom=nvidia.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.117.160 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.160; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.117.160) by CH2PEPF0000014A.mail.protection.outlook.com (10.167.244.107) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9520.1 via Frontend Transport; Tue, 20 Jan 2026 14:58:45 +0000 Received: from rnnvmail205.nvidia.com (10.129.68.10) by mail.nvidia.com (10.129.200.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Tue, 20 Jan 2026 06:58:28 -0800 Received: from rnnvmail205.nvidia.com (10.129.68.10) by rnnvmail205.nvidia.com (10.129.68.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Tue, 20 Jan 2026 06:58:27 -0800 Received: from sumitg-l4t.nvidia.com (10.127.8.14) by mail.nvidia.com (10.129.68.10) with Microsoft SMTP Server id 15.2.2562.20 via Frontend Transport; Tue, 20 Jan 2026 06:58:20 -0800 From: Sumit Gupta To: , , , , , , , , , , , , , , , , , , CC: , , , , , , , , Subject: [PATCH v6 9/9] cpufreq: CPPC: Update cached perf_ctrls on sysfs write Date: Tue, 20 Jan 2026 20:26:23 +0530 Message-ID: <20260120145623.2959636-10-sumitg@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260120145623.2959636-1-sumitg@nvidia.com> References: <20260120145623.2959636-1-sumitg@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: quoted-printable X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PEPF0000014A:EE_|DS5PPFB8FBD73EA:EE_ X-MS-Office365-Filtering-Correlation-Id: 71956172-93b4-428f-648e-08de583468c8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|376014|7416014|36860700013|1800799024|921020; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?VTKNStWjITNSSj6lNmKyl4o959slffcC0TOUdMNuWJq7LEb65QQ+2plgYuum?= =?us-ascii?Q?EckJVlG5FdFPNdMlJrmGlCV0NYoTAg+bWw9Bb2WswGThiOW3YtJjpEQy8gc8?= =?us-ascii?Q?wTAeWdeWmlDucyFTEu1zxYC0gQYUZsT8ZGktPOu3aHCgex7i4PtKIogEPsRK?= =?us-ascii?Q?7Ln3OCLrKIdNzzHJdch/ip65Zr45RlrYIJLGRou8V3Wm4uXTxQHc0BSrC8+3?= =?us-ascii?Q?wqW5kZaJCN2LDfqDEH5dnwJ6BfYd8W+wdQFMc08G8SIwWbUL/n7HXze4vT9H?= =?us-ascii?Q?xUmHGNKQDpTPUm8F79QOLxY7p5HBfC12en1AeAFKh2glzL/vhDje+oO8itrz?= =?us-ascii?Q?t3Dh4orDJmFg/TN8AYn8RIreuZdK3zJmDnPEEuQWfMgf3AhPvQaFWFnNlKsf?= =?us-ascii?Q?NZLx6zor+BabdQRlu6D6NKnSOmhDDAYXVGZsalXx8ej5w/g2gwKHxDgp5yf4?= =?us-ascii?Q?W8kknfAZCGc8aqqb1V6KjXnpQfQAEk9z7T/oxjXa1r+CzO+ZXltdl6/ocht3?= =?us-ascii?Q?tSIXNL6EW3xMqfPY8H/qp66esBGOn8i1UmAksNMbKTsurOn1SFgqjBnYyp3V?= =?us-ascii?Q?yk6QjjJzmWA1jx1pHbke81J6LkzbO7avSoY376SP9rk9W9Gn87xaeU5Lh0dk?= =?us-ascii?Q?jqsMWYgfvwEu448L3Fls0+ksYGik0f/wAvEEJlrestqbWwBo+GQEdMX4nfHO?= =?us-ascii?Q?jxWGYVMCvrQNfBPwpGGp6etAwuz3veKO5fPSQ57xHr23vuw2mbieMN4IZHaz?= =?us-ascii?Q?vNdNpvcAwFYift4KyZSFFiBPtYgifNTklb/2/+KiM5GTpWW9H8VDRE7Tv+H1?= =?us-ascii?Q?xgQgk/uanc5nsAQR9T1beYbSHdH47wecHcsfGDOglyshVCUewMJZrKbbe27Y?= =?us-ascii?Q?u8o7YwvVf9NM/X+rjon2fgB39bnz1KWIgzlnpaD1lQUvyjMbTUy0sdYJ/G3i?= =?us-ascii?Q?UuP4iQb3v4uLLnz8DJKyAHpR2Gt5tfRBoCV7H81Vj6CaqwiLcMlsukqWuvkv?= =?us-ascii?Q?jG2yW+HexzJMRMRYEk9UWQBgoU5FxnpfrmuCVheUq8ZOSIUTtwc05UUNZX1Z?= =?us-ascii?Q?Qm+NAjH6NyeCYyk+HY0ojxRm/pHcGXA39x1HmeXRM1rLWh1PLORGmhuF+qJI?= =?us-ascii?Q?5Z9nHLRyFaga35O9dSoYnUUODB4LCtuaH2NTLfX3/+H59rj++OFh8xljeDv1?= =?us-ascii?Q?Wf71L2ZXwRsPak7fb9+q1zUjOi0FcAHsYEEU2aZNHkSHtFzA28HP9JoAtv9c?= =?us-ascii?Q?Q18Y/CrDdoPBHuhxdxFt2JN4JiJJ6Jbd2ISK4LWFsyz83IIq96pQTZS2ex6B?= =?us-ascii?Q?1/Uba+FgEVQ8xPV9fTvDmMO+kWTiHlHCr4e0lNon6QwNbcZIKV65MoJRrL6R?= =?us-ascii?Q?aG1ZihcSLgFGl7YyFfHwVbn6Fja7wME8Nxcpq3LWRM/Z8pXaI9MsXJrMU0gb?= =?us-ascii?Q?A8nekTCuE+9hzhD/4ABtrzidww75rh3xTtkGyLP6wTNpsCSd4PEnvKP6xWHr?= =?us-ascii?Q?d4PzPkgmn17hSZowOgy82UxvSvy5oY0Ar5NfXjch/Y9jzfkZG/2I9LKtwCJN?= =?us-ascii?Q?u9PKH7kdBet6Mk8VYXBK3bUOGSA+Nc+iIqyY9eGDggPSN6H3O+bh7vFemGKd?= =?us-ascii?Q?evbQXi7iSxA+bVBW+ZNf1kZjO1jNEOhsrNCFdB1M08xwpi7s404KCr7LZaC/?= =?us-ascii?Q?Sccqrb2Hh66/g0GmymtoySD88o0=3D?= X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(82310400026)(376014)(7416014)(36860700013)(1800799024)(921020);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Jan 2026 14:58:45.1568 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 71956172-93b4-428f-648e-08de583468c8 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CH2PEPF0000014A.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS5PPFB8FBD73EA Content-Type: text/plain; charset="utf-8" Update the cached perf_ctrls values when writing via sysfs to keep them in sync with hardware registers: - store_auto_select(): update perf_ctrls.auto_sel - store_energy_performance_preference_val(): update perf_ctrls.energy_perf Add mutex protection to these functions to ensure hardware register writes and cache updates are atomic. This ensures consistent cached values after sysfs writes, which complements the cppc_get_perf() initialization during policy setup. Signed-off-by: Sumit Gupta --- drivers/cpufreq/cppc_cpufreq.c | 35 ++++++++++++++++++++++++++++++++-- 1 file changed, 33 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c index afb2cdb67a2f..946fb93179d7 100644 --- a/drivers/cpufreq/cppc_cpufreq.c +++ b/drivers/cpufreq/cppc_cpufreq.c @@ -886,6 +886,7 @@ static ssize_t show_auto_select(struct cpufreq_policy *= policy, char *buf) static ssize_t store_auto_select(struct cpufreq_policy *policy, const char *buf, size_t count) { + struct cppc_cpudata *cpu_data =3D policy->driver_data; bool val; int ret; =20 @@ -893,10 +894,14 @@ static ssize_t store_auto_select(struct cpufreq_polic= y *policy, if (ret) return ret; =20 + guard(mutex)(&cppc_cpufreq_autonomous_lock); + ret =3D cppc_set_auto_sel(policy->cpu, val); if (ret) return ret; =20 + cpu_data->perf_ctrls.auto_sel =3D val; + return count; } =20 @@ -946,8 +951,34 @@ static ssize_t store_##_name(struct cpufreq_policy *po= licy, \ CPPC_CPUFREQ_ATTR_RW_U64(auto_act_window, cppc_get_auto_act_window, cppc_set_auto_act_window) =20 -CPPC_CPUFREQ_ATTR_RW_U64(energy_performance_preference_val, - cppc_get_epp_perf, cppc_set_epp) +static ssize_t +show_energy_performance_preference_val(struct cpufreq_policy *policy, char= *buf) +{ + return cppc_cpufreq_sysfs_show_u64(policy->cpu, cppc_get_epp_perf, buf); +} + +static ssize_t +store_energy_performance_preference_val(struct cpufreq_policy *policy, + const char *buf, size_t count) +{ + struct cppc_cpudata *cpu_data =3D policy->driver_data; + u64 val; + int ret; + + ret =3D kstrtou64(buf, 0, &val); + if (ret) + return ret; + + guard(mutex)(&cppc_cpufreq_autonomous_lock); + + ret =3D cppc_set_epp(policy->cpu, val); + if (ret) + return ret; + + cpu_data->perf_ctrls.energy_perf =3D val; + + return count; +} =20 /** * show_min_perf - Show minimum performance as frequency (kHz) --=20 2.34.1