From mboxrd@z Thu Jan 1 00:00:00 1970 From: Cristian Marussi Subject: [RFC PATCH 7/7] arm64: smp: add arch specific cpu parking helper Date: Fri, 23 Aug 2019 12:57:20 +0100 Message-ID: <20190823115720.605-8-cristian.marussi@arm.com> References: <20190823115720.605-1-cristian.marussi@arm.com> Return-path: In-Reply-To: <20190823115720.605-1-cristian.marussi@arm.com> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, dave.martin@arm.com, james.morse@arm.com, mark.rutland@arm.com, catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de, peterz@infradead.org, takahiro.akashi@linaro.org, hidehiro.kawai.ez@hitachi.com List-Id: linux-arch.vger.kernel.org Add an arm64 specific helper which parks the cpu in a more architecture efficient way. Signed-off-by: Cristian Marussi --- arch/arm64/kernel/smp.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index c7497a885cfd..a3fb22b4c870 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -947,6 +947,12 @@ void tick_broadcast(const struct cpumask *mask) } #endif +void arch_smp_cpu_park(void) +{ + while (1) + cpu_park_loop(); +} + void arch_smp_cpus_stop_complete(void) { sdei_mask_local_cpu(); -- 2.17.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from foss.arm.com ([217.140.110.172]:33092 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2394343AbfHWL6g (ORCPT ); Fri, 23 Aug 2019 07:58:36 -0400 From: Cristian Marussi Subject: [RFC PATCH 7/7] arm64: smp: add arch specific cpu parking helper Date: Fri, 23 Aug 2019 12:57:20 +0100 Message-ID: <20190823115720.605-8-cristian.marussi@arm.com> In-Reply-To: <20190823115720.605-1-cristian.marussi@arm.com> References: <20190823115720.605-1-cristian.marussi@arm.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: linux-kernel@vger.kernel.org Cc: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, dave.martin@arm.com, james.morse@arm.com, mark.rutland@arm.com, catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de, peterz@infradead.org, takahiro.akashi@linaro.org, hidehiro.kawai.ez@hitachi.com Message-ID: <20190823115720.LIZWQCP-BsNplXyLdC_LmPHA4bfCcZkEHkHCEZATGcw@z> Add an arm64 specific helper which parks the cpu in a more architecture efficient way. Signed-off-by: Cristian Marussi --- arch/arm64/kernel/smp.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index c7497a885cfd..a3fb22b4c870 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -947,6 +947,12 @@ void tick_broadcast(const struct cpumask *mask) } #endif +void arch_smp_cpu_park(void) +{ + while (1) + cpu_park_loop(); +} + void arch_smp_cpus_stop_complete(void) { sdei_mask_local_cpu(); -- 2.17.1