From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Zijlstra Subject: [PATCH v2 07/44] cpuidle,psci: Push RCU-idle into driver Date: Mon, 19 Sep 2022 11:59:46 +0200 Message-ID: <20220919101520.802976773@infradead.org> References: <20220919095939.761690562@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: DKIM-Filter: OpenDKIM Filter v2.11.0 smtp2.osuosl.org E7C2D40B72 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp2.osuosl.org 45C17400C4 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp3.osuosl.org E579060BAF DKIM-Filter: OpenDKIM Filter v2.11.0 smtp3.osuosl.org 177E360B9B DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=nefRY1zld6SB6gly/BgzrvcXEKwr/pOkUZl11QGpgL8=; b=A9Y5adyud1/mM3xreS5eUrJvnd FvUqFIv3nlupLbTdeI33lEpY/zFLIe19vxpCf8VQNlb07A5YwXLCUo0YY6Nuqzs/xjWg+Sj2Wqxqx RAKsZxGa5p4Dkxg5ntJ8XtfvkMD+8w17RzWJpVa5IW9NqPm9m4txBnQGDoVesEU79pfxKNmKTjAHM QmPWfVUPI0jr1ypsV5iZbItClD0P2Di/q7Z5RllXZy5ZJH2hOmD80dPHf6vt8aFDpFVRstMV7z9qd FPTHr06kvgBzpugI2hUMZPsElk/ZqCI0u/yXhF3TnRjADu3s+L6sywGDm998dkamTun6T/pertQtI 8lYuUinw==; List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" To: peterz@infradead.org Cc: juri.lelli@redhat.com, rafael@kernel.org, catalin.marinas@arm.com, linus.walleij@linaro.org, bsegall@google.com, guoren@kernel.org, pavel@ucw.cz, agordeev@linux.ibm.com, linux-arch@vger.kernel.org, vincent.guittot@linaro.org, mpe@ellerman.id.au, chenhuacai@kernel.org, christophe.leroy@csgroup.eu, linux-acpi@vger.kernel.org, agross@kernel.org, geert@linux-m68k.org, linux-imx@nxp.com, vgupta@kernel.org, mattst88@gmail.com, mturquette@baylibre.com, sammy@sammy.net, pmladek@suse.com, linux-pm@vger.kernel.org, Sascha Hauer , linux-um@lists.infradead.org, npiggin@gmail.com, tglx@linutronix.de, linux-omap@vger.kernel.org, dietmar.eggemann@arm.com, andreyknvl@gmail.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, senozhatsky@chromium.org, svens@linux.ibm.com, jolsa@kernel.org, tj@kernel.org, Andrew Morton Doing RCU-idle outside the driver, only to then temporarily enable it again, at least twice, before going idle is daft. Signed-off-by: Peter Zijlstra (Intel) --- drivers/cpuidle/cpuidle-psci.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) --- a/drivers/cpuidle/cpuidle-psci.c +++ b/drivers/cpuidle/cpuidle-psci.c @@ -69,12 +69,12 @@ static int __psci_enter_domain_idle_stat return -1; /* Do runtime PM to manage a hierarchical CPU toplogy. */ - ct_irq_enter_irqson(); if (s2idle) dev_pm_genpd_suspend(pd_dev); else pm_runtime_put_sync_suspend(pd_dev); - ct_irq_exit_irqson(); + + ct_idle_enter(); state = psci_get_domain_state(); if (!state) @@ -82,12 +82,12 @@ static int __psci_enter_domain_idle_stat ret = psci_cpu_suspend_enter(state) ? -1 : idx; - ct_irq_enter_irqson(); + ct_idle_exit(); + if (s2idle) dev_pm_genpd_resume(pd_dev); else pm_runtime_get_sync(pd_dev); - ct_irq_exit_irqson(); cpu_pm_exit(); @@ -240,6 +240,7 @@ static int psci_dt_cpu_init_topology(str * of a shared state for the domain, assumes the domain states are all * deeper states. */ + drv->states[state_count - 1].flags |= CPUIDLE_FLAG_RCU_IDLE; drv->states[state_count - 1].enter = psci_enter_domain_idle_state; drv->states[state_count - 1].enter_s2idle = psci_enter_s2idle_domain_idle_state; psci_cpuidle_use_cpuhp = true;