linux-kernel - Re: virtio-pci new configuration proposal

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Message-ID: <87vcqurk25.fsf@rustcorp.com.au>
Date:	Tue, 08 Nov 2011 20:51:38 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Sasha Levin <levinsasha928@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	kvm <kvm@...r.kernel.org>,
	virtualization <virtualization@...ts.linux-foundation.org>,
	Anthony Liguori <anthony@...emonkey.ws>
Subject: Re: virtio-pci new configuration proposal

On Tue, 8 Nov 2011 08:32:50 +0200, "Michael S. Tsirkin" <mst@...hat.com> wrote:
> On Tue, Nov 08, 2011 at 10:23:33AM +1030, Rusty Russell wrote:
> > Even so, should we just use the PCI cap list, and have each
> > cap entry just contain a BIR & offset?
> > 
> > Thanks,
> > Rusty.
> 
> And size :)
> I say, Rusty, did you see my patch? That's what it's doing,
> I also addressed the issue that with KVM on x86, PIO is faster
> than MMIO so we need to use it for notifications/isr.

Faster?  Really?  Why?  Were the ppc guys right that's it's obsolescent?

Because PIO is going to be ugly AFAICT for every non-x86 platform.

Cheers,
Rusty.



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