From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757419Ab3J1SZH (ORCPT ); Mon, 28 Oct 2013 14:25:07 -0400 Received: from smtp.codeaurora.org ([198.145.11.231]:42930 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756661Ab3J1SZE (ORCPT ); Mon, 28 Oct 2013 14:25:04 -0400 From: Stephen Boyd To: Russell King Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Kevin Hilman , Frederic Weisbecker Subject: [PATCH] ARM: Support arch_irq_work_raise() via self IPIs Date: Mon, 28 Oct 2013 11:25:01 -0700 Message-Id: <1382984701-2371-1-git-send-email-sboyd@codeaurora.org> X-Mailer: git-send-email 1.8.4.1.600.g3d092bf In-Reply-To: <526DBEAA.4030707@linaro.org> References: <526DBEAA.4030707@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This will allow the scheduler tick to be restarted if we're in full NOHZ mode. Cc: Kevin Hilman Cc: Frederic Weisbecker Signed-off-by: Stephen Boyd --- arch/arm/include/asm/hardirq.h | 2 +- arch/arm/kernel/smp.c | 18 ++++++++++++++++++ 2 files changed, 19 insertions(+), 1 deletion(-) diff --git a/arch/arm/include/asm/hardirq.h b/arch/arm/include/asm/hardirq.h index 2740c2a2..3d7351c 100644 --- a/arch/arm/include/asm/hardirq.h +++ b/arch/arm/include/asm/hardirq.h @@ -5,7 +5,7 @@ #include #include -#define NR_IPI 6 +#define NR_IPI 7 typedef struct { unsigned int __softirq_pending; diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 72024ea..bf9a0d6d 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include @@ -66,6 +67,7 @@ enum ipi_msg_type { IPI_CALL_FUNC, IPI_CALL_FUNC_SINGLE, IPI_CPU_STOP, + IPI_IRQ_WORK, }; static DECLARE_COMPLETION(cpu_running); @@ -448,6 +450,13 @@ void arch_send_call_function_single_ipi(int cpu) smp_cross_call(cpumask_of(cpu), IPI_CALL_FUNC_SINGLE); } +#ifdef CONFIG_IRQ_WORK +void arch_irq_work_raise(void) +{ + smp_cross_call(cpumask_of(smp_processor_id()), IPI_IRQ_WORK); +} +#endif + static const char *ipi_types[NR_IPI] = { #define S(x,s) [x] = s S(IPI_WAKEUP, "CPU wakeup interrupts"), @@ -456,6 +465,7 @@ static const char *ipi_types[NR_IPI] = { S(IPI_CALL_FUNC, "Function call interrupts"), S(IPI_CALL_FUNC_SINGLE, "Single function call interrupts"), S(IPI_CPU_STOP, "CPU stop interrupts"), + S(IPI_IRQ_WORK, "IRQ work interrupts"), }; void show_ipi_list(struct seq_file *p, int prec) @@ -565,6 +575,14 @@ void handle_IPI(int ipinr, struct pt_regs *regs) irq_exit(); break; +#ifdef CONFIG_IRQ_WORK + case IPI_IRQ_WORK: + irq_enter(); + irq_work_run(); + irq_exit(); + break; +#endif + default: printk(KERN_CRIT "CPU%u: Unknown IPI message 0x%x\n", cpu, ipinr); -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation