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From: Cristian Marussi <cristian.marussi@arm.com>
To: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org, mark.rutland@arm.com,
	peterz@infradead.org, catalin.marinas@arm.com,
	takahiro.akashi@linaro.org, james.morse@arm.com,
	hidehiro.kawai.ez@hitachi.com, tglx@linutronix.de,
	will@kernel.org, linux-arm-kernel@lists.infradead.org,
	mingo@redhat.com, x86@kernel.org, dzickus@redhat.com,
	ehabkost@redhat.com, linux@armlinux.org.uk, davem@davemloft.net,
	sparclinux@vger.kernel.org, hch@infradead.org
Subject: [RFC PATCH v3 07/12] arm64: smp: add arch specific cpu parking helper
Date: Thu, 19 Dec 2019 12:19:00 +0000	[thread overview]
Message-ID: <20191219121905.26905-8-cristian.marussi@arm.com> (raw)
In-Reply-To: <20191219121905.26905-1-cristian.marussi@arm.com>

Add an arm64 specific helper which parks the cpu in a more architecture
efficient way.

Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
 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 edb2de85507a..3f108be544f8 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -952,6 +952,12 @@ 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


WARNING: multiple messages have this Message-ID (diff)
From: Cristian Marussi <cristian.marussi@arm.com>
To: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org, mark.rutland@arm.com,
	sparclinux@vger.kernel.org, dzickus@redhat.com,
	ehabkost@redhat.com, peterz@infradead.org,
	catalin.marinas@arm.com, x86@kernel.org, linux@armlinux.org.uk,
	hch@infradead.org, takahiro.akashi@linaro.org, mingo@redhat.com,
	james.morse@arm.com, hidehiro.kawai.ez@hitachi.com,
	tglx@linutronix.de, will@kernel.org, davem@davemloft.net,
	linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH v3 07/12] arm64: smp: add arch specific cpu parking helper
Date: Thu, 19 Dec 2019 12:19:00 +0000	[thread overview]
Message-ID: <20191219121905.26905-8-cristian.marussi@arm.com> (raw)
In-Reply-To: <20191219121905.26905-1-cristian.marussi@arm.com>

Add an arm64 specific helper which parks the cpu in a more architecture
efficient way.

Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
 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 edb2de85507a..3f108be544f8 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -952,6 +952,12 @@ 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


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2019-12-19 12:19 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-19 12:18 [RFC PATCH v3 00/12] Unify SMP stop generic logic to common code Cristian Marussi
2019-12-19 12:18 ` Cristian Marussi
2019-12-19 12:18 ` [RFC PATCH v3 01/12] smp: add generic SMP-stop support " Cristian Marussi
2019-12-19 12:18   ` Cristian Marussi
2019-12-19 12:18 ` [RFC PATCH v3 02/12] smp: unify crash_ and smp_send_stop() logic Cristian Marussi
2019-12-19 12:18   ` Cristian Marussi
2019-12-19 12:18 ` [RFC PATCH v3 03/12] smp: coordinate concurrent crash/smp stop calls Cristian Marussi
2019-12-19 12:18   ` Cristian Marussi
2019-12-19 12:18   ` Cristian Marussi
2019-12-19 12:18 ` [RFC PATCH v3 04/12] smp: address races of starting CPUs while stopping Cristian Marussi
2019-12-19 12:18   ` Cristian Marussi
2019-12-19 12:18 ` [RFC PATCH v3 05/12] arm64: smp: use generic SMP stop common code Cristian Marussi
2019-12-19 12:18   ` Cristian Marussi
2019-12-19 12:18 ` [RFC PATCH v3 06/12] arm64: smp: use SMP crash-stop " Cristian Marussi
2019-12-19 12:18   ` Cristian Marussi
2019-12-19 12:18   ` Cristian Marussi
2019-12-19 12:19 ` Cristian Marussi [this message]
2019-12-19 12:19   ` [RFC PATCH v3 07/12] arm64: smp: add arch specific cpu parking helper Cristian Marussi
2019-12-19 12:19 ` [RFC PATCH v3 08/12] x86: smp: use generic SMP stop common code Cristian Marussi
2019-12-19 12:19   ` Cristian Marussi
2019-12-19 12:19   ` Cristian Marussi
2019-12-19 12:19 ` [RFC PATCH v3 09/12] x86: smp: use SMP crash-stop " Cristian Marussi
2019-12-19 12:19   ` Cristian Marussi
2019-12-19 12:19 ` [RFC PATCH v3 10/12] arm: smp: use generic SMP stop " Cristian Marussi
2019-12-19 12:19   ` Cristian Marussi
2019-12-19 12:19 ` [RFC PATCH v3 11/12] arm: smp: use SMP crash-stop " Cristian Marussi
2019-12-19 12:19   ` Cristian Marussi
2019-12-19 12:19 ` [RFC PATCH v3 12/12] sparc64: smp: use generic SMP stop " Cristian Marussi
2019-12-19 12:19   ` Cristian Marussi
2019-12-19 12:19   ` Cristian Marussi
2020-01-13 16:40 ` [RFC PATCH v3 00/12] Unify SMP stop generic logic to " Will Deacon
2020-01-13 16:40   ` Will Deacon
2020-01-13 17:05   ` Cristian Marussi
2020-01-13 17:05     ` Cristian Marussi

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