Re: [PATCH RESEND v2 1/1] ARM Feroceon: fix kexec by settingouter_cache.inv_all

From: Jason Cooper
Date: Wed Apr 10 2013 - 12:49:05 EST

On Mon, Apr 08, 2013 at 10:34:07PM +0300, Elijah Ragozin wrote:
> 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>
> ---
> arch/arm/mm/cache-feroceon-l2.c | 1 +
> 1 file changed, 1 insertion(+)


Acked-by: Jason Cooper <jason@xxxxxxxxxxxxxx>

Please put this in Russell King's patch tracker so he can pull it in.


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