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From: Blue Swirl <blauwirbel@gmail.com>
Date: Mon, 18 Jan 2010 19:56:19 +0000
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Subject: [Qemu-devel] Re: [PATCHv2 0/3] rwhandler: introduce and switch
	pci_host to it
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To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Isaku Yamahata <yamahata@valinux.co.jp>, paul@codesourcery.com, qemu-devel@nongnu.org, Aurelien Jarno <aurelien@aurel32.net>, agraf@suse.de

On Mon, Jan 18, 2010 at 7:41 PM, Michael S. Tsirkin <mst@redhat.com> wrote:
> On Mon, Jan 18, 2010 at 07:53:25PM +0200, Michael S. Tsirkin wrote:
>> On Mon, Jan 18, 2010 at 05:50:35PM +0000, Blue Swirl wrote:
>> > On Mon, Jan 18, 2010 at 10:56 AM, Michael S. Tsirkin <mst@redhat.com> =
wrote:
>> > > Alexander, so I assume the following patchset should be enough for y=
ou
>> > > to implement u3 support, simply by creating your own rwhandler, and
>> > > using pci_data_read/write directly there. I have pushed it to a
>> > > temporary branch in my tree:
>> > > git://git.kernel.org/pub/scm/linux/kernel/git/mst/qemu.git rwhandler
>> > >
>> > > Paul, any comments on this approach?
>> > >
>> > > I'll push this to my pci tree if this turns out to be helpful.
>> > > Hope this helps, and sorry about the churn.
>> >
>> > I proposed earlier something similar for MMIO. The thread could be int=
eresting:
>> > http://lists.gnu.org/archive/html/qemu-devel/2009-05/msg00095.html
>>
>> IIUC that patch seems to do much more, and also seems to involve all io?
>> This one is just a library that devices can use. Intended users are not
>> performance-critical like pci config.
>
> To put it in other words: could you please be more explicit please? =C2=
=A0I
> failed to see the relevance ...

Well, I thought the stuff I proposed earlier may be useful for
comparison. It was also opt-in like yours, by the way.

Also the end result that Paul wasn't interested in my patch may (or
may not) be relevant with yours too.