linux-kernel - Re: [PATCHv5] uio: add generic driver for PCI 2.3 devices

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Message-ID: <20090720161542.25dcddb4@jbarnes-g45>
Date:	Mon, 20 Jul 2009 16:15:42 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Greg KH <gregkh@...e.de>
Cc:	"Michael S. Tsirkin" <mst@...hat.com>,
	"Hans J. Koch" <hjk@...utronix.de>, anthony@...emonkey.ws,
	avi@...hat.com, kvm@...r.kernel.org, chrisw@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCHv5] uio: add generic driver for PCI 2.3 devices

On Mon, 20 Jul 2009 12:55:36 -0700
Greg KH <gregkh@...e.de> wrote:

> On Mon, Jul 20, 2009 at 10:52:27PM +0300, Michael S. Tsirkin wrote:
> > On Mon, Jul 20, 2009 at 09:09:43PM +0200, Hans J. Koch wrote:
> > > On Mon, Jul 20, 2009 at 10:29:34AM +0300, Michael S. Tsirkin
> > > wrote:
> > > > This adds a generic uio driver that can bind to any PCI
> > > > device.  First user will be virtualization where a qemu
> > > > userspace process needs to give guest OS access to the device.
> > > > 
> > > > Interrupts are handled using the Interrupt Disable bit in the
> > > > PCI command register and Interrupt Status bit in the PCI status
> > > > register.  All devices compliant to PCI 2.3 (circa 2002) and
> > > > all compliant PCI Express devices should support these bits.
> > > > Driver detects this support, and won't bind to devices which do
> > > > not support the Interrupt Disable Bit in the command register.
> > > > 
> > > > It's expected that more features of interest to virtualization
> > > > will be added to this driver in the future. Possibilities are:
> > > > mmap for device resources, MSI/MSI-X, eventfd (to interface
> > > > with kvm), iommu.
> > > 
> > > Thanks for adding the docs! Looks alright to me.
> > > 
> > > Thanks,
> > > Hans
> > > 
> > > > 
> > > > Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> > > > Acked-by: Chris Wright <chrisw@...hat.com>
> > > 
> > > Signed-off-by: Hans J. Koch <hjk@...utronix.de>
> > 
> > Jesse just acked this patch in a private mail, as well.
> > Acked-by: Jesse Barnes <jbarnes@...tuousgeek.org>
> 
> Odd, but ok...

I just replied to Michael's off-list forward of some of the thread that
I missed, I'm not trying to hide anything. :)

Move along, nothing to see here...

-- 
Jesse Barnes, Intel Open Source Technology Center
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