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

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Date:	Mon, 20 Jul 2009 12:55:36 -0700
From:	Greg KH <gregkh@...e.de>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	"Hans J. Koch" <hjk@...utronix.de>, anthony@...emonkey.ws,
	avi@...hat.com, kvm@...r.kernel.org, chrisw@...hat.com,
	linux-kernel@...r.kernel.org,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: Re: [PATCHv5] uio: add generic driver for PCI 2.3 devices

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'll queue it up now.

thanks,

greg k-h
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