From mboxrd@z Thu Jan  1 00:00:00 1970
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [PATCH V4] POWERPC: BOOK3S: KVM: Use the saved dar value and
 generic make_dsisr
Date: Tue, 06 May 2014 10:04:16 +1000
Message-ID: <1399334656.20388.69.camel@pasglop>
References: <1399224075-18041-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
	 <536773C2.1070502@suse.de> <87tx949u9d.fsf@linux.vnet.ibm.com>
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Cc: Alexander Graf <agraf@suse.de>, paulus@samba.org,
	linuxppc-dev@lists.ozlabs.org, kvm-ppc@vger.kernel.org,
	kvm@vger.kernel.org
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
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On Mon, 2014-05-05 at 19:56 +0530, Aneesh Kumar K.V wrote:
> 
> Paul mentioned that BOOK3S always had DAR value set on alignment
> interrupt. And the patch is to enable/collect correct DAR value when
> running with Little Endian PR guest. Now to limit the impact and to
> enable Little Endian PR guest, I ended up doing the conditional code
> only for book3s 64 for which we know for sure that we set DAR value.

Only BookS ? Afaik, the kernel align.c unconditionally uses DAR on
every processor type. It's DSISR that may or may not be populated
but afaik DAR always is.

Cheers,
Ben.