From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Zijlstra Subject: [PATCH v2 41/44] intel_idle: Add force_irq_on module param Date: Mon, 19 Sep 2022 12:00:20 +0200 Message-ID: <20220919101523.110221113@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 34FDF41707 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp2.osuosl.org 6596D41725 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp1.osuosl.org 8D1FA84262 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp1.osuosl.org C7B5684068 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; 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=RR6lW9yNo9DZO38N/e4p2MZQ6Q7RTpDFv4YAvZRPRqw=; b=dhBNASMjq9JKam0WFAPScBiUEC 31XDK+h8qwhTq5EYT0SjwEcio54RYo3YXNJzL9qp8vVRkHyfJsQdQcJ5Pti5d6ymG6v5YR3rrgpSe 4XQcuWxDsJ1q6ovVgaQ+SzZulVoRGlSkSN5mw4EvYN4P6fE8HKs2maYkCA13mRDRuD64OLEBGUXNF /Qgic1QrUIq2i79qFoP0kCFY/irIFSIMyGshswJWaLZxBi5W3PBUL9nwY5VACRXQbvXsyeiTIa0ch J7yjXG2VyjwvJ2v3SrZKjK45QEL7p9TWkv0I41FozhTFdQrt5gfJGZDLrunBCNqm7Jycvz/5X9SYw ljUFiqLQ==; 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 For testing purposes. Signed-off-by: Peter Zijlstra (Intel) --- drivers/idle/intel_idle.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -1787,6 +1787,9 @@ static bool __init intel_idle_verify_cst return true; } +static bool force_irq_on __read_mostly; +module_param(force_irq_on, bool, 0444); + static void __init intel_idle_init_cstates_icpu(struct cpuidle_driver *drv) { int cstate; @@ -1838,8 +1841,10 @@ static void __init intel_idle_init_cstat /* Structure copy. */ drv->states[drv->state_count] = cpuidle_state_table[cstate]; - if (cpuidle_state_table[cstate].flags & CPUIDLE_FLAG_IRQ_ENABLE) + if ((cpuidle_state_table[cstate].flags & CPUIDLE_FLAG_IRQ_ENABLE) || force_irq_on) { + printk("intel_idle: forced intel_idle_irq for state %d\n", cstate); drv->states[drv->state_count].enter = intel_idle_irq; + } if (cpu_feature_enabled(X86_FEATURE_KERNEL_IBRS) && cpuidle_state_table[cstate].flags & CPUIDLE_FLAG_IBRS) {