[Qemu-devel] Re: [PATCHv2 0/3] rwhandler: introduce and switch pci_host to it

[Blue Swirl <blauwirbel@gmail.com>]

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 you
>> > > 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 interesting:
>> > 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?  I
> 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.