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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 15.20.7519.19 via Frontend Transport; Fri, 26 Apr 2024 06:35:22 +0000 Received: from pyuan-Chachani-VN.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 15.1.2507.35; Fri, 26 Apr 2024 01:35:19 -0500 From: Perry Yuan To: , , , , , CC: , , , , , Subject: [PATCH v8 4/6] cpufreq: amd-pstate: fix the MSR highest perf will be reset issue while cpb boost off Date: Fri, 26 Apr 2024 14:34:47 +0800 Message-ID: <1d623d592548c7349254cb7dbea8826bb8a99eb3.1714112854.git.perry.yuan@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: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PEPF0000013D:EE_|IA1PR12MB6137:EE_ X-MS-Office365-Filtering-Correlation-Id: 57721e14-b5b3-4d55-dcc7-08dc65bb0c9a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Apr 2024 06:35:22.4064 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 57721e14-b5b3-4d55-dcc7-08dc65bb0c9a 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: IA1PR12MB6137 Content-Type: text/plain; charset="utf-8" From: Perry Yuan Select the min perf to fix the highest perf value while update pstate CPPC request MSR register, here we need to limit the max perf value when CPU boost is disabled in case of that highest perf value in the MSR will be reset to original highest perf value which cause the BOOST control failed. Signed-off-by: Perry Yuan Acked-by: Huang Rui Reviewed-by: Mario Limonciello --- drivers/cpufreq/amd-pstate.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 53ef39c6dbfa..993e3e6b6609 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -476,6 +476,7 @@ static void amd_pstate_update(struct amd_cpudata *cpuda= ta, u32 min_perf, u32 des_perf, u32 max_perf, bool fast_switch, int gov_flags) { u64 prev =3D READ_ONCE(cpudata->cppc_req_cached); + u32 nominal_perf =3D READ_ONCE(cpudata->nominal_perf); u64 value =3D prev; =20 min_perf =3D clamp_t(unsigned long, min_perf, cpudata->min_limit_perf, @@ -495,6 +496,10 @@ static void amd_pstate_update(struct amd_cpudata *cpud= ata, u32 min_perf, value &=3D ~AMD_CPPC_DES_PERF(~0L); value |=3D AMD_CPPC_DES_PERF(des_perf); =20 + /* limit the max perf when core performance boost feature is disabled */ + if (!amd_pstate_global_params.cpb_boost) + max_perf =3D min_t(unsigned long, nominal_perf, max_perf); + value &=3D ~AMD_CPPC_MAX_PERF(~0L); value |=3D AMD_CPPC_MAX_PERF(max_perf); =20 --=20 2.34.1