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[v2,08/16] ARM: bL_platsmp.c: close the kernel entry gate before hot-unplugging a CPU

Message ID 1359008879-9015-9-git-send-email-nicolas.pitre@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Nicolas Pitre Jan. 24, 2013, 6:27 a.m. UTC 
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(+)
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Patch

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();
 }