From: Alexander Graf <agraf@suse.de>
To: David Gibson <dgibson@redhat.com>, Laurent Vivier <lvivier@redhat.com>
Cc: thuth@redhat.com, qemu-ppc@nongnu.org, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH] target-ppc: Multiple/String Word alignment exception
Date: Thu, 31 Mar 2016 08:54:20 +0200 [thread overview]
Message-ID: <56FCC99C.2030809@suse.de> (raw)
In-Reply-To: <20160331102945.5a31dbe5@voom.fritz.box>
On 31.03.16 01:29, David Gibson wrote:
> On Wed, 30 Mar 2016 19:13:00 +0200
> Laurent Vivier <lvivier@redhat.com> wrote:
>
>> If the processor is in little-endian mode, an alignment interrupt must
>> occur for the following instructions: lmw, stmw, lswi, lswx, stswi or stswx.
>>
>> This is what happens with KVM, so change TCG to do the same.
>>
>> As the instruction can be emulated by the kernel, enable the change
>> only in softmmu mode.
>>
>> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
>
> I guess this makes sense given the existing hardware behaviour, even
> though it seems a bit perverse to me to make the emulator strictly less
> functional.
>
> Alex, what do you think?
In general we only implement strict checks if it breaks guests not to
have them. Are you aware of any such case?
Alex
next prev parent reply other threads:[~2016-03-31 6:54 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-30 17:13 [Qemu-devel] [PATCH] target-ppc: Multiple/String Word alignment exception Laurent Vivier
2016-03-30 23:29 ` David Gibson
2016-03-31 0:53 ` Laurent Vivier
2016-03-31 6:54 ` Alexander Graf [this message]
2016-03-31 7:06 ` Laurent Vivier
2016-03-31 7:15 ` Alexander Graf
2016-03-31 7:39 ` Laurent Vivier
2016-03-31 8:50 ` Thomas Huth
2016-03-31 9:03 ` Alexander Graf
2016-03-31 9:18 ` Thomas Huth
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