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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: [PATCH v2 07/14] openrisc/thread_info: Introduce TIF_NOTIFY_IPI flag Date: Thu, 13 Jun 2024 18:16:06 +0000 Message-ID: <20240613181613.4329-8-kprateek.nayak@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240613181613.4329-1-kprateek.nayak@amd.com> References: <20240613181613.4329-1-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: CY4PEPF0000FCC1:EE_|MW4PR12MB7381:EE_ X-MS-Office365-Filtering-Correlation-Id: 59e11ef9-d14e-4b17-2da7-08dc8bd578e3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230035|376009|7416009|1800799019|36860700008|82310400021; 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:(13230035)(376009)(7416009)(1800799019)(36860700008)(82310400021); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Jun 2024 18:20:14.9404 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 59e11ef9-d14e-4b17-2da7-08dc8bd578e3 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: CY4PEPF0000FCC1.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB7381 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 --- v1..v2: o No changes. --- 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<