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

[Joerg Roedel]

On Tue, Jun 01, 2010 at 09:59:40PM -0700, Tom Lyon wrote:
> This is just what I was thinking.  But rather than a get/set, just use two fds.
> 
> 	ioctl(vfio_fd1, VFIO_SET_DOMAIN, vfio_fd2);
> 
> This may fail if there are really 2 different IOMMUs, so user code must be
> prepared for failure,  In addition, this is strictlyupwards compatible with 
> what is there now, so maybe we can add it later.

How can this fail with multiple IOMMUs? This should be handled
transparently by the IOMMU driver.

	Joerg

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