linux-kernel - Re: [PATCH V2] VFIO driver: Non-privileged user level PCI drivers

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Message-ID: <20100609160550.GA22312@redhat.com>
Date:	Wed, 9 Jun 2010 19:05:50 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Tom Lyon <pugs@...co.com>
Cc:	randy.dunlap@...cle.com, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org, chrisw@...s-sol.org, joro@...tes.org,
	hjk@...utronix.de, avi@...hat.com, gregkh@...e.de,
	aafabbri@...co.com, scofeldm@...co.com
Subject: Re: [PATCH V2] VFIO driver: Non-privileged user level PCI drivers

On Tue, Jun 08, 2010 at 02:21:52PM -0700, Tom Lyon wrote:
> +	case VFIO_DOMAIN_UNSET:
> +		vfio_domain_unset(vdev);
> +		ret = 0;
> +		break;
> +

What if I do:
SET
mmap
UNSET

Now I have access to device which is not behind an iommu.
Simplest solution is to remove the UNSET ioctl:
it's not terribly useful anyway.

-- 
MST
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