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Wysocki" CC: "open list:X86 PLATFORM DRIVERS" , , Mario Limonciello Subject: [PATCH 4/4] platform/x86: amd-pmc: Drop CPU QoS workaround Date: Thu, 10 Mar 2022 09:17:05 -0600 Message-ID: <20220310151705.577442-4-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220310151705.577442-1-mario.limonciello@amd.com> References: <20220310151705.577442-1-mario.limonciello@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] 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-Office365-Filtering-Correlation-Id: ef46745c-b79a-4f6e-0332-08da02a99823 X-MS-TrafficTypeDiagnostic: CH2PR12MB4840:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230001)(4636009)(40470700004)(36840700001)(46966006)(40460700003)(2906002)(8936002)(47076005)(36756003)(2616005)(54906003)(110136005)(316002)(86362001)(70206006)(336012)(186003)(4326008)(26005)(82310400004)(16526019)(8676002)(426003)(70586007)(1076003)(83380400001)(44832011)(508600001)(36860700001)(81166007)(356005)(5660300002)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Mar 2022 15:21:05.0569 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ef46745c-b79a-4f6e-0332-08da02a99823 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: DM6NAM11FT063.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB4840 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org A workaround was previously introduced as part of commit 646f429ec2de ("platform/x86: amd-pmc: Set QOS during suspend on CZN w/ timer wakeup") to prevent CPUs from going into the deepest state during the execution of the `noirq` stage of `amd_pmc`. As `amd_pmc` has been pushed to the last step for suspend on AMD platforms, this workaround is no longer necessary. Signed-off-by: Mario Limonciello --- drivers/platform/x86/amd-pmc.c | 22 ---------------------- 1 file changed, 22 deletions(-) diff --git a/drivers/platform/x86/amd-pmc.c b/drivers/platform/x86/amd-pmc.c index c13fd93f2662..b636fbe90407 100644 --- a/drivers/platform/x86/amd-pmc.c +++ b/drivers/platform/x86/amd-pmc.c @@ -21,7 +21,6 @@ #include #include #include -#include #include #include #include @@ -96,9 +95,6 @@ #define PMC_MSG_DELAY_MIN_US 50 #define RESPONSE_REGISTER_LOOP_MAX 20000 -/* QoS request for letting CPUs in idle states, but not the deepest */ -#define AMD_PMC_MAX_IDLE_STATE_LATENCY 3 - #define SOC_SUBSYSTEM_IP_MAX 12 #define DELAY_MIN_US 2000 #define DELAY_MAX_US 3000 @@ -153,7 +149,6 @@ struct amd_pmc_dev { struct device *dev; struct pci_dev *rdev; struct mutex lock; /* generic mutex lock */ - struct pm_qos_request amd_pmc_pm_qos_req; #if IS_ENABLED(CONFIG_DEBUG_FS) struct dentry *dbgfs_dir; #endif /* CONFIG_DEBUG_FS */ @@ -628,14 +623,6 @@ static int amd_pmc_verify_czn_rtc(struct amd_pmc_dev *pdev, u32 *arg) rc = rtc_alarm_irq_enable(rtc_device, 0); dev_dbg(pdev->dev, "wakeup timer programmed for %lld seconds\n", duration); - /* - * Prevent CPUs from getting into deep idle states while sending OS_HINT - * which is otherwise generally safe to send when at least one of the CPUs - * is not in deep idle states. - */ - cpu_latency_qos_update_request(&pdev->amd_pmc_pm_qos_req, AMD_PMC_MAX_IDLE_STATE_LATENCY); - wake_up_all_idle_cpus(); - return rc; } @@ -675,9 +662,6 @@ static int amd_pmc_suspend(void *context, bool constraints_met) return 0; fail: - if (pdev->cpu_id == AMD_CPU_ID_CZN) - cpu_latency_qos_update_request(&pdev->amd_pmc_pm_qos_req, - PM_QOS_DEFAULT_VALUE); return rc; } @@ -704,11 +688,6 @@ static void amd_pmc_resume(void *context) if (rc) dev_err(pdev->dev, "error writing to STB: %d\n", rc); - /* Restore the QoS request back to defaults if it was set */ - if (pdev->cpu_id == AMD_CPU_ID_CZN) - cpu_latency_qos_update_request(&pdev->amd_pmc_pm_qos_req, - PM_QOS_DEFAULT_VALUE); - /* Notify on failed entry */ amd_pmc_validate_deepest(pdev); } @@ -884,7 +863,6 @@ static int amd_pmc_probe(struct platform_device *pdev) goto err_pci_dev_put; amd_pmc_dbgfs_register(dev); - cpu_latency_qos_add_request(&dev->amd_pmc_pm_qos_req, PM_QOS_DEFAULT_VALUE); return 0; err_pci_dev_put: -- 2.34.1