From: illia.ragozin@grapecom.com (Elijah Ragozin) Date: Wed, 10 Apr 2013 21:42:12 +0300 Subject: [PATCH RESEND v2 1/1] ARM Feroceon: fix kexec by setting outer_cache.inv_all In-Reply-To: <20130410164805.GA28693@titan.lakedaemon.net> References: <51631B12.2010908@grapecom.com> <51631BAF.40408@grapecom.com> <20130410164805.GA28693@titan.lakedaemon.net> Message-ID: <5165B284.9020700@grapecom.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 10.04.2013 19:48, Jason Cooper wrote: > 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 >> --- >> arch/arm/mm/cache-feroceon-l2.c | 1 + >> 1 file changed, 1 insertion(+) > fwiw, > > Acked-by: Jason Cooper > > Please put this in Russell King's patch tracker so he can pull it in. > > thx, > > Jason. > Jason, thank you for reviewing and acking, I just put the patch to the Russell King's patch tracker. -- Best Regards, Illia Ragozin.