Re: [fedora-virt] No iommu_group links in /sys/bus/pci/devices/
On Tue, 2013-06-25 at 18:46 +0200, Mario Ceresa wrote:
Dear all,
following Cole's suggestions I installed the fedora-virt-preview repo and
tried again with VGA
passthrough from [1]
For this setup i use a nvidia card as the primary one and a radeon hd 7850
as the passthrough device.
However, there are no iommu_group links neither under
/sys/bus/pci/devices/0000:05:00.0/ (which is my radeon card) nor under any
of the other devices.
AFAIG it should be the vfio module which creates these links so I guess
it's not working for me.
The driver loads correctly: there are no errors in dmesg and lsmod shows:
vfio_pci 32063 0
vfio 19210 1 vfio_pci
I added iommu=pt iommu=1 to grub
iommu=1 is not a valid option. The user in archlinux thread is using an
AMD system, which enables the iommu by default. On an Intel system, use
intel_iommu=on
My system currently includes:
* libvrit 1.0.6
* qemu 1.5.0
* kernel 3.9.6
Maybe the kernel is outdated?
I know the functionality is experimental so it's just to know if I'm doing
some obvious mistakes.
Thanks for your help,
Best regards,
Mario
[1] https://bbs.archlinux.org/viewtopic.php?id=162768
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