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Commit 805ee38b authored by Abhimanyu Kapur's avatar Abhimanyu Kapur Committed by Runmin Wang
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ARM64: Flush the caches for non panicking CPUs in case of a kernel panic 



In case of a kernel panic, only the panicking CPU does an entire
cache flush. This means that certain dirty cache lines in the
caches of the other CPUs may never get flushed. This gives us
improper RAM dumps. Add cache flushing for all the online CPUs.
The outer domain is not flushed since it is already being done by
the panicking CPU.

Change-Id: I03cf14f49334e45c145a17b06d0c623575b653e8
Signed-off-by: default avatarAbhimanyu Kapur <abhimany@codeaurora.org>
Signed-off-by: default avatarKyle Yan <kyan@codeaurora.org>
Signed-off-by: default avatarChannagoud Kadabi <ckadabi@codeaurora.org>
Signed-off-by: default avatarRunmin Wang <runminw@codeaurora.org>
parent 6c4d635c

arch/arm64/kernel/smp.c

+1 −0
Original line number Diff line number Diff line
@@ -856,6 +856,7 @@ static void ipi_cpu_stop(unsigned int cpu) 


	set_cpu_active(cpu, false);



	flush_cache_all();

	local_irq_disable();



	while (1)