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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Alexander Graf <agraf@suse.de>
Cc: kvm@vger.kernel.org, olofj@google.com, kvm-ppc@vger.kernel.org,
	paulus@samba.org,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
	linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH V4] POWERPC: BOOK3S: KVM: Use the saved dar value and generic make_dsisr
Date: Tue, 06 May 2014 10:07:27 +1000	[thread overview]
Message-ID: <1399334847.20388.72.camel@pasglop> (raw)
In-Reply-To: <5367A39D.9080709@suse.de>

On Mon, 2014-05-05 at 16:43 +0200, Alexander Graf 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.
> 
> Yes, and I'm asking whether we know that this statement holds true for 
> PA6T and G5 chips which I wouldn't consider IBM POWER. Since the G5 is 
> at least developed by IBM, I'd assume its semantics here are similar to 
> POWER4, but for PA6T I wouldn't be so sure.

I am not aware of any PowerPC processor that does not set DAR on
alignment interrupts. Paul, are you ?

Cheers,
Ben.

  parent reply	other threads:[~2014-05-06  0:07 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-04 17:21 [PATCH V4] POWERPC: BOOK3S: KVM: Use the saved dar value and generic make_dsisr Aneesh Kumar K.V
2014-05-05 11:19 ` Alexander Graf
2014-05-05 14:26   ` Aneesh Kumar K.V
2014-05-05 14:43     ` Alexander Graf
2014-05-05 14:50       ` Aneesh Kumar K.V
2014-05-05 15:10         ` Alexander Graf
2014-05-05 14:54       ` Olof Johansson
2014-05-05 15:03         ` Aneesh Kumar K.V
2014-05-05 15:06           ` Olof Johansson
2014-05-05 14:57       ` Olof Johansson
2014-05-05 15:09         ` Alexander Graf
2014-05-05 21:23         ` Christian Zigotzky
2014-05-06  0:07       ` Benjamin Herrenschmidt [this message]
2014-05-06  0:04     ` Benjamin Herrenschmidt
2014-05-06  0:41   ` Paul Mackerras
2014-05-06  6:57     ` Alexander Graf
2014-05-06 14:06       ` Aneesh Kumar K.V
2014-05-06 14:12       ` Aneesh Kumar K.V
2014-05-06 14:21         ` Alexander Graf

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