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Wysocki" , Lorenzo Pieralisi , Fabio Estevam , Lucas Stach , Aisheng Dong Subject: [RFC 2/7] cpuidle: Add cpu poke support Thread-Topic: [RFC 2/7] cpuidle: Add cpu poke support Thread-Index: AQHU5J/xpRRIW2AJek+3mcOjLL/sJg== Date: Wed, 27 Mar 2019 13:21:09 +0000 Message-ID: <1553692845-20983-3-git-send-email-abel.vesa@nxp.com> References: <1553692845-20983-1-git-send-email-abel.vesa@nxp.com> In-Reply-To: <1553692845-20983-1-git-send-email-abel.vesa@nxp.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: VI1PR0701CA0038.eurprd07.prod.outlook.com (2603:10a6:800:90::24) To AM0PR04MB5779.eurprd04.prod.outlook.com (2603:10a6:208:131::23) x-originating-ip: [212.146.100.6] authentication-results: spf=none (sender IP is ) smtp.mailfrom=abel.vesa@nxp.com; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.7.4 x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 3ab53a77-04b0-4d0c-da77-08d6b2b7138d x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600127)(711020)(4605104)(4618075)(2017052603328)(7153060)(7193020); SRVR:AM0PR04MB6051; x-ms-traffictypediagnostic: AM0PR04MB6051: x-microsoft-antispam-prvs: x-forefront-prvs: 0989A7979C x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(366004)(136003)(39860400002)(396003)(346002)(376002)(199004)(189003)(25786009)(14444005)(68736007)(4326008)(6436002)(5660300002)(6116002)(71200400001)(71190400001)(3846002)(256004)(8936002)(8676002)(6636002)(2501003)(66066001)(305945005)(2906002)(53936002)(81156014)(6512007)(7736002)(81166006)(7416002)(97736004)(6486002)(36756003)(54906003)(44832011)(50226002)(486006)(106356001)(6506007)(386003)(186003)(110136005)(102836004)(446003)(14454004)(476003)(86362001)(99286004)(11346002)(52116002)(478600001)(316002)(2616005)(26005)(105586002)(76176011)(921003)(1121003); DIR:OUT; SFP:1101; SCL:1; SRVR:AM0PR04MB6051; H:AM0PR04MB5779.eurprd04.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: TWH2+42YzTL6r44EZTcRdorG9+5Np9ttK6YSpIXGF/hrUeQvdfNgtu7oZUyCeQWDbW7dWBaqqOChfu+Hq0Klo9+F5IaA9IyoPzS/8eRFdmwo0QrjFSLcC8MynB7byLhB4w5gk2L4WMzw0mw8w+QCQ+O1f3utBRcRocvv0F6QQ5S3scocSOrvk/mEWuDxolBgfsLMRA5iI5LE4bug1qU3FgC6LTTkmDaZlX/cuIcTIvtGBoKDDX4bhzd8SIYBil/lTrpW7Sr+q8dH+fAG548PXvli26DFVu5vwTJaim6lnrgH6+sKwgyeN/tGFtYDIsXfkGDxZjhF9sI+0hYQPXtahAFb175eXZLSGX0YVuSt/rAZW4OA53rtfnffJwj8U0PHyJP4216wsMYLrZR/p7AFLWnNEGvXsyUhgEFXDkTphZ4= MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 3ab53a77-04b0-4d0c-da77-08d6b2b7138d X-MS-Exchange-CrossTenant-originalarrivaltime: 27 Mar 2019 13:21:09.9348 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR04MB6051 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190327_062116_499524_D22CF65E X-CRM114-Status: GOOD ( 14.05 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Abel Vesa , "linux-pm@vger.kernel.org" , dl-linux-imx , "linux-arm-kernel@lists.infradead.org" , Linux Kernel Mailing List Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Having a poke operation per state, allows each cpuidle driver to implement, for each state, different ways of waking up (poking) cores. Signed-off-by: Abel Vesa --- drivers/cpuidle/cpuidle.c | 34 ++++++++++++++++++++++++++++++++++ include/linux/cpuidle.h | 6 ++++++ 2 files changed, 40 insertions(+) diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index 7f10830..fca5313 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -297,6 +297,29 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv, } /** + * cpuidle_poke_single - poke the specified cpu to wake up from + * current idle state + * + * @dev: cpuidle device for this cpu + * @drv: cpuidle driver for this cpu + * @cpu: the index of the cpu + */ +int cpuidle_poke_single(struct cpuidle_driver *drv, struct cpuidle_device *dev, + int cpu) +{ + struct cpuidle_state *state; + + if (cpuidle_disabled()) + return 0; + + state = sched_idle_get_state(cpu); + if (state && state->poke) + return state->poke(dev, drv, cpu); + + return 0; +} + +/** * cpuidle_select - ask the cpuidle framework to choose an idle state * * @drv: the cpuidle driver @@ -414,6 +437,17 @@ void cpuidle_resume(void) mutex_unlock(&cpuidle_lock); } +void cpuidle_poke(const struct cpumask *mask) +{ + struct cpuidle_device *dev = cpuidle_get_device(); + struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev); + int cpu; + + for_each_cpu(cpu, mask) { + WARN_ON(cpuidle_poke_single(drv, dev, cpu)); + } +} + /** * cpuidle_enable_device - enables idle PM for a CPU * @dev: the CPU diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h index 88a9119..0270771 100644 --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -55,6 +55,10 @@ struct cpuidle_state { struct cpuidle_driver *drv, int index); + int (*poke) (struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int cpu); + int (*enter_dead) (struct cpuidle_device *dev, int index); /* @@ -145,6 +149,7 @@ extern void cpuidle_unregister(struct cpuidle_driver *drv); extern void cpuidle_pause_and_lock(void); extern void cpuidle_resume_and_unlock(void); extern void cpuidle_pause(void); +extern void cpuidle_poke(const struct cpumask *mask); extern void cpuidle_resume(void); extern int cpuidle_enable_device(struct cpuidle_device *dev); extern void cpuidle_disable_device(struct cpuidle_device *dev); @@ -181,6 +186,7 @@ static inline void cpuidle_unregister(struct cpuidle_driver *drv) { } static inline void cpuidle_pause_and_lock(void) { } static inline void cpuidle_resume_and_unlock(void) { } static inline void cpuidle_pause(void) { } +static inline void cpuidle_poke(const struct cpumask *mask) { } static inline void cpuidle_resume(void) { } static inline int cpuidle_enable_device(struct cpuidle_device *dev) {return -ENODEV; }