From: Cristian Marussi <cristian.marussi@arm.com>
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
Subject: [RFC PATCH 7/7] arm64: smp: add arch specific cpu parking helper
Date: Fri, 23 Aug 2019 12:57:20 +0100 [thread overview]
Message-ID: <20190823115720.605-8-cristian.marussi@arm.com> (raw)
In-Reply-To: <20190823115720.605-1-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 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
next prev parent reply other threads:[~2019-08-23 11:58 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-23 11:57 [RFC PATCH 0/7] Unify SMP stop generic logic to common code Cristian Marussi
2019-08-23 11:57 ` [RFC PATCH 1/7] smp: add generic SMP-stop support " Cristian Marussi
2019-08-23 11:57 ` [RFC PATCH 2/7] smp: unify crash_ and smp_send_stop() logic Cristian Marussi
2019-08-23 11:57 ` [RFC PATCH 3/7] smp: coordinate concurrent crash/smp stop calls Cristian Marussi
2019-08-23 11:57 ` [RFC PATCH 4/7] smp: address races of starting CPUs while stopping Cristian Marussi
2019-08-23 11:57 ` [RFC PATCH 5/7] arm64: smp: use generic SMP stop common code Cristian Marussi
2019-08-26 15:32 ` Christoph Hellwig
2019-08-26 19:58 ` Cristian Marussi
2019-08-26 22:26 ` Thomas Gleixner
2019-08-27 14:34 ` Cristian Marussi
2019-08-23 11:57 ` [RFC PATCH 6/7] arm64: smp: use SMP crash-stop " Cristian Marussi
2019-08-23 11:57 ` Cristian Marussi [this message]
2019-08-26 15:34 ` [RFC PATCH 0/7] Unify SMP stop generic logic to " Christoph Hellwig
2019-08-26 19:33 ` Cristian Marussi
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