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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 SA2PEPF000015CA.mail.protection.outlook.com (10.167.241.200) 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 17:18:56 +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 11:18:49 -0600 From: K Prateek Nayak To: CC: "Gautham R. Shenoy" , K Prateek Nayak , Jonas Bonn , "Stefan Kristiansson" , Stafford Horne , "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 07/14] openrisc/thread_info: Introduce TIF_NOTIFY_IPI flag Date: Tue, 20 Feb 2024 22:44:50 +0530 Message-ID: <20240220171457.703-8-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: SA2PEPF000015CA:EE_|PH7PR12MB6740:EE_ X-MS-Office365-Filtering-Correlation-Id: 872b0406-2ebd-4595-99a9-08dc32380504 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:(13230031)(36860700004)(46966006)(40470700004); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Feb 2024 17:18:56.2731 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 872b0406-2ebd-4595-99a9-08dc32380504 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: SA2PEPF000015CA.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB6740 Add support for TIF_NOTIFY_IPI on OpenRISC. 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: Jonas Bonn Cc: Stefan Kristiansson Cc: Stafford Horne 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-openrisc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org Signed-off-by: K Prateek Nayak --- arch/openrisc/include/asm/thread_info.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/openrisc/include/asm/thread_info.h b/arch/openrisc/include/asm/thread_info.h index 4af3049c34c2..6a386703bc43 100644 --- a/arch/openrisc/include/asm/thread_info.h +++ b/arch/openrisc/include/asm/thread_info.h @@ -92,6 +92,7 @@ register struct thread_info *current_thread_info_reg asm("r10"); * mode */ #define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */ +#define TIF_NOTIFY_IPI 6 /* Pending IPI on TIF_POLLLING idle CPU */ #define TIF_SYSCALL_TRACEPOINT 8 /* for ftrace syscall instrumentation */ #define TIF_RESTORE_SIGMASK 9 #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling * TIF_NEED_RESCHED @@ -104,6 +105,7 @@ register struct thread_info *current_thread_info_reg asm("r10"); #define _TIF_NEED_RESCHED (1<