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Date: Wed, 15 May 2013 09:36:32 +0200
From: Laszlo Ersek <lersek@redhat.com>
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Subject: Re: [Qemu-devel] [SeaBIOS] [PATCH v17] Add pvpanic device driver
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To: Hu Tao <hutao@cn.fujitsu.com>
Cc: Peter Maydell <peter.maydell@linaro.org>, Gleb Natapov <gleb@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, Jan Kiszka <jan.kiszka@siemens.com>, seabios@seabios.org, qemu-devel <qemu-devel@nongnu.org>, Alexander Graf <agraf@suse.de>, Blue Swirl <blauwirbel@gmail.com>, Orit Wasserman <owasserm@redhat.com>, Juan Quintela <quintela@redhat.com>, Markus Armbruster <armbru@redhat.com>, Christian Borntraeger <borntraeger@de.ibm.com>, Andrew Jones <drjones@redhat.com>, Alex Williamson <alex.williamson@redhat.com>, Kevin O'Connor <kevin@koconnor.net>, Sasha Levin <levinsasha928@gmail.com>, Stefan Hajnoczi <stefanha@redhat.com>, Luiz Capitulino <lcapitulino@redhat.com>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, Anthony Liguori <aliguori@us.ibm.com>, Marcelo Tosatti <mtosatti@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>

On 05/15/13 09:27, Hu Tao wrote:
> On Wed, May 15, 2013 at 09:21:54AM +0200, Laszlo Ersek wrote:
>> On 04/05/13 09:17, Hu Tao wrote:
>>
>>> +            Method(RDPT, 0, NotSerialized) {
>>> +                Store(PEPT, Local0)
>>> +                Return (Local0)
>>> +            }
>>> +
>>> +            Method(WRPT, 1, NotSerialized) {
>>> +                Store(Arg0, PEPT)
>>> +            }
>>
>> Please excuse my asking, I haven't been following this -- who's supposed
>> to call these methods? The latest guest kernel patch I managed to find
>> ([PATCH v7] kvm: notify host when the guest is panicked -- probably
>> obsolete by now) appears to do a direct outl().
> 
> An old version calls WRPT but is buggy, so you see the outl version.
> This patch is in seabios before the outl version. If you think these
> methods are needless, feel free to send a patch.

Oh no, that's not what I meant! I'm just rounding up backport candidates :)

Thanks!
Laszlo