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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 SA2PEPF000015C6.mail.protection.outlook.com (10.167.241.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.7292.25 via Frontend Transport; Tue, 20 Feb 2024 17:20:44 +0000 Received: from BLR5CG134614W.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; Tue, 20 Feb 2024 11:20:38 -0600 From: K Prateek Nayak To: CC: "Gautham R. Shenoy" , K Prateek Nayak , "James E.J. Bottomley" , Helge Deller , "Rafael J. Wysocki" , Daniel Lezcano , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , "Mel Gorman" , Daniel Bristot de Oliveira , Valentin Schneider , , Subject: [RFC PATCH 12/14] parisc/thread_info: Introduce TIF_NOTIFY_IPI flag Date: Tue, 20 Feb 2024 22:44:55 +0530 Message-ID: <20240220171457.703-13-kprateek.nayak@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240220171457.703-1-kprateek.nayak@amd.com> References: <20240220171457.703-1-kprateek.nayak@amd.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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: SA2PEPF000015C6:EE_|MW3PR12MB4506:EE_ X-MS-Office365-Filtering-Correlation-Id: d662f4dc-cbb6-4d7a-1548-08dc3238459d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: NhlX6kO/lOuZ7X2yCs/2g2+4aYEoTsiVaVg24jbzSr+4t47nU0e+KSBMcn5HXdpQWy44TfYhh6QKHouXTm7tHfqJxja6+t0xWMyd+L/vKpHuaZyjc8CKpfWFytAKL68Owr+RKGgQHrMzcaZiTDj4KqqPIwDoefNewnaI+Ln51XQ0FfM1s4qHL49OsZeICRtv8ewle/xfdW7h9ODy8kJR6sPI7lPH1aIEf3M7IHIarHb7vdJkpKkPolfXK5TWBVTBHEjJr5HVVB+wbUknnbYm/Q3HZPISTxaHW6Rd8JjKbiMajYez+sVpqR21dNGHZM94VHj+lzPpXA7lLac4h2CxJev1x0T5IYoJUMexzcA1jfMBW+nxyo6+HI5Fl2FwLNaE+3isJ2PYAffPxF9xyhJoCGEb1gTmQh+xBXEfaGvG4Edqj3xDqWFXfNiTdvOKYlZcL00hp358BdEGHmyUUmrUuOfGo9WnEfYDswigWn8Wi4VmgohOUdyOBFeYhDa+wytG+sSaYRbqvs0Ukqc490jS+y1x1y7zTp8jXXz3aOTT0awcBtj5ybEmLrUbRVt+jq3Oab5BQ/TbPEV4ODWTMdSde/wXSI+HIolECwJVIt+B25MQdsIvMNIHK4YLEbvokJnW9HzonR7yWEqNNq8PXB6LIKlUIbvERj2DuQeaZmOfekQ= 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:(13230031)(230273577357003)(36860700004)(46966006)(40470700004); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Feb 2024 17:20:44.6622 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d662f4dc-cbb6-4d7a-1548-08dc3238459d 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: SA2PEPF000015C6.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW3PR12MB4506 Add support for TIF_NOTIFY_IPI on PA-RISC. With TIF_NOTIFY_IPI, a sender sending an IPI to an idle CPU in TIF_POLLING mode will set the TIF_NOTIFY_IPI flag in the target's idle tasks's thread_info to pull the CPU out of idle, as opposed to setting TIF_NEED_RESCHED previously. This avoids spurious calls to schedule_idle() in cases where an IPI does not necessarily wake up a task on the idle CPU. Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: "Rafael J. Wysocki" Cc: Daniel Lezcano Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Juri Lelli Cc: Vincent Guittot Cc: Dietmar Eggemann Cc: Steven Rostedt Cc: Ben Segall Cc: Mel Gorman Cc: Daniel Bristot de Oliveira Cc: Valentin Schneider Cc: K Prateek Nayak Cc: linux-parisc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org Signed-off-by: K Prateek Nayak --- arch/parisc/include/asm/thread_info.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/parisc/include/asm/thread_info.h b/arch/parisc/include/asm/thread_info.h index 1a58795f785c..35f1deeb8f36 100644 --- a/arch/parisc/include/asm/thread_info.h +++ b/arch/parisc/include/asm/thread_info.h @@ -52,6 +52,7 @@ struct thread_info { #define TIF_SECCOMP 11 /* secure computing */ #define TIF_SYSCALL_TRACEPOINT 12 /* syscall tracepoint instrumentation */ #define TIF_NONBLOCK_WARNING 13 /* warned about wrong O_NONBLOCK usage */ +#define TIF_NOTIFY_IPI 14 /* Pending IPI on TIF_POLLLING idle CPU */ #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) @@ -65,6 +66,7 @@ struct thread_info { #define _TIF_BLOCKSTEP (1 << TIF_BLOCKSTEP) #define _TIF_SECCOMP (1 << TIF_SECCOMP) #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) +#define _TIF_NOTIFY_IPI (1 << TIF_NOTIFY_IPI) #define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \ _TIF_NEED_RESCHED | _TIF_NOTIFY_SIGNAL)