Re: [PATCH] VFIO driver: Non-privileged user level PCI drivers

[Avi Kivity]

On 06/02/2010 12:42 PM, Joerg Roedel wrote:
> On Tue, Jun 01, 2010 at 12:55:32PM +0300, Michael S. Tsirkin wrote:
>
>    
> > There seems to be some misunderstanding.  The userspace interface
> > proposed forces a separate domain per device and forces userspace to
> > repeat iommu programming for each device.  We are better off sharing a
> > domain between devices and programming the iommu once.
> >
> > The natural way to do this is to have an iommu driver for programming
> > iommu.
> >      
> IMO a seperate iommu-userspace driver is a nightmare for a userspace
> interface. It is just too complicated to use. We can solve the problem
> of multiple devices-per-domain with an ioctl which allows binding one
> uio-device to the address-space on another. Thats much simpler.
>    

This is non trivial with hotplug.

--
error compiling committee.c: too many arguments to function

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