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From: nicolas.pitre@linaro.org (Nicolas Pitre)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 08/16] ARM: bL_platsmp.c: close the kernel entry gate before hot-unplugging a CPU
Date: Thu, 24 Jan 2013 01:27:51 -0500	[thread overview]
Message-ID: <1359008879-9015-9-git-send-email-nicolas.pitre@linaro.org> (raw)
In-Reply-To: <1359008879-9015-1-git-send-email-nicolas.pitre@linaro.org>

If for whatever reason a CPU is unexpectedly awaken, it shouldn't
re-enter the kernel by using whatever entry vector that might have
been set by a previous operation.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
---
 arch/arm/common/bL_platsmp.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/common/bL_platsmp.c b/arch/arm/common/bL_platsmp.c
index e28dd50640..c3835b0e29 100644
--- a/arch/arm/common/bL_platsmp.c
+++ b/arch/arm/common/bL_platsmp.c
@@ -63,6 +63,11 @@ static int bL_cpu_disable(unsigned int cpu)
 
 static void __ref bL_cpu_die(unsigned int cpu)
 {
+	unsigned int mpidr, pcpu, pcluster;
+	mpidr = read_cpuid_mpidr();
+	pcpu = MPIDR_AFFINITY_LEVEL(mpidr, 0);
+	pcluster = MPIDR_AFFINITY_LEVEL(mpidr, 1);
+	bL_set_entry_vector(pcpu, pcluster, NULL);
 	bL_cpu_power_down();
 }
 
-- 
1.8.0

  parent reply	other threads:[~2013-01-24  6:27 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-01-24  6:27 [PATCH v2 00/16] low-level CPU and cluster power management Nicolas Pitre
2013-01-24  6:27 ` [PATCH v2 01/16] ARM: introduce common set_auxcr/get_auxcr functions Nicolas Pitre
2013-01-28 14:39   ` Will Deacon
2013-01-28 15:23     ` Nicolas Pitre
2013-01-24  6:27 ` [PATCH v2 02/16] ARM: b.L: secondary kernel entry code Nicolas Pitre
2013-01-28 14:46   ` Will Deacon
2013-01-28 15:07     ` Nicolas Pitre
2013-01-24  6:27 ` [PATCH v2 03/16] ARM: b.L: introduce the CPU/cluster power API Nicolas Pitre
2013-01-24  6:27 ` [PATCH v2 04/16] ARM: b.L: introduce helpers for platform coherency exit/setup Nicolas Pitre
2013-01-24  6:27 ` [PATCH v2 05/16] ARM: b.L: Add baremetal voting mutexes Nicolas Pitre
2013-01-24  6:27 ` [PATCH v2 06/16] ARM: bL_head.S: vlock-based first man election Nicolas Pitre
2013-01-28 17:18   ` Will Deacon
2013-01-28 17:58     ` Nicolas Pitre
2013-01-24  6:27 ` [PATCH v2 07/16] ARM: b.L: generic SMP secondary bringup and hotplug support Nicolas Pitre
2013-01-24  6:27 ` Nicolas Pitre [this message]
2013-01-24  6:27 ` [PATCH v2 09/16] ARM: vexpress: Select the correct SMP operations at run-time Nicolas Pitre
2013-01-24 11:56   ` Jon Medhurst (Tixy)
2013-01-24  6:27 ` [PATCH v2 10/16] ARM: vexpress: introduce DCSCB support Nicolas Pitre
2013-01-24  6:27 ` [PATCH v2 11/16] ARM: vexpress/dcscb: add CPU use counts to the power up/down API implementation Nicolas Pitre
2013-01-24  6:27 ` [PATCH v2 12/16] ARM: vexpress/dcscb: do not hardcode number of CPUs per cluster Nicolas Pitre
2013-01-24  6:27 ` [PATCH v2 13/16] drivers/bus: add ARM CCI support Nicolas Pitre
2013-01-24 21:05   ` saeed bishara
2013-01-24  6:27 ` [PATCH v2 14/16] ARM: CCI: ensure powerdown-time data is flushed from cache Nicolas Pitre
2013-01-24  6:27 ` [PATCH v2 15/16] ARM: vexpress/dcscb: handle platform coherency exit/setup and CCI Nicolas Pitre
2013-01-24  6:27 ` [PATCH v2 16/16] ARM: vexpress/dcscb: probe via device tree Nicolas Pitre

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