From mboxrd@z Thu Jan  1 00:00:00 1970
From: Krishna J <krishnamurthyjs@outlook.com>
Subject: PCI device pass through support
Date: Wed, 28 Nov 2012 16:32:35 +0000
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References: <20121127215203.5751.6523.stgit@bling.home>
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Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>
To: Alex Williamson <alex.williamson@redhat.com>,
	"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
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Hi Alex,
I am trying to pass through a PCI device to the guest to=A0compare=A0th=
e MSI=A0interrupt=A0latency with normal device pass=A0through=A0and pas=
s through using VFIO framework. I used the following script

for dev in $(ls /sys/bus/pci/devices/0000:06:00.0/iommu_group/devices);=
 do
=A0 =A0 vendor=3D$(cat /sys/bus/pci/devices/$dev/vendor)
=A0 =A0 device=3D$(cat /sys/bus/pci/devices/$dev/device)
=A0 =A0 if [ -e /sys/bus/pci/devices/$dev/driver ]; then
=A0 =A0 =A0 =A0 echo $dev > /sys/bus/pci/devices/$dev/driver/unbind
=A0 =A0 fi
=A0 =A0 echo $vendor $device > /sys/bus/pci/drivers/vfio-pci/new_id
done

and added "-device vfio-pci,host,host=3D0000:06:00.0" to my qemu comman=
d line.=A0

I am getting Error - qemu-system-x86_64: -device vfio-pci,host,host=3D0=
000:06:00.0: Property 'vfio-pci.host' doesn't take value 'on'--=A0when =
i use the qemu for your git repo and and=A0also=A0the latest v1.3.0-rc1=
=A0qemu. I am using Kernel=A03.6.7-rt18. Am i missing step ?


Krishna