This is a note to let you know that I've just added the patch titled
ARM: 7696/1: Fix kexec by setting outer_cache.inv_all for Feroceon
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-7696-1-fix-kexec-by-setting-outer_cache.inv_all-for-feroceon.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cd272d1ea71583170e95dde02c76166c7f9017e6 Mon Sep 17 00:00:00 2001
From: Illia Ragozin <illia.ragozin@xxxxxxxxxxxx>
Date: Wed, 10 Apr 2013 19:43:34 +0100
Subject: ARM: 7696/1: Fix kexec by setting outer_cache.inv_all for Feroceon
From: Illia Ragozin <illia.ragozin@xxxxxxxxxxxx>
commit cd272d1ea71583170e95dde02c76166c7f9017e6 upstream.
On Feroceon the L2 cache becomes non-coherent with the CPU
when the L1 caches are disabled. Thus the L2 needs to be invalidated
after both L1 caches are disabled.
On kexec before the starting the code for relocation the kernel,
the L1 caches are disabled in cpu_froc_fin (cpu_v7_proc_fin for Feroceon),
but after L2 cache is never invalidated, because inv_all is not set
in cache-feroceon-l2.c.
So kernel relocation and decompression may has (and usually has) errors.
Setting the function enables L2 invalidation and fixes the issue.
Signed-off-by: Illia Ragozin <illia.ragozin@xxxxxxxxxxxx>
Acked-by: Jason Cooper <jason@xxxxxxxxxxxxxx>
Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mm/cache-feroceon-l2.c | 1 +
1 file changed, 1 insertion(+)
--- a/arch/arm/mm/cache-feroceon-l2.c
+++ b/arch/arm/mm/cache-feroceon-l2.c
@@ -343,6 +343,7 @@ void __init feroceon_l2_init(int __l2_wt
outer_cache.inv_range = feroceon_l2_inv_range;
outer_cache.clean_range = feroceon_l2_clean_range;
outer_cache.flush_range = feroceon_l2_flush_range;
+ outer_cache.inv_all = l2_inv_all;
enable_l2();
Patches currently in stable-queue which might be from illia.ragozin@xxxxxxxxxxxx are
queue-3.4/arm-7696-1-fix-kexec-by-setting-outer_cache.inv_all-for-feroceon.patch
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