[vfio-users] vfio:How to make two devices work simultaneously

[arjenvanweelden at gmail.com]

On Fri, 2019-07-05 at 18:58 +0530, Devendra Shastry wrote:
> Hi,
> 
> I have two PCIe devices in a PC.Both the devices are listed under
> same 
> iommu group.
> 
> [    0.443063] iommu: Adding device 0000:01:00.0 to group 1
> [    0.443065] iommu: Adding device 0000:02:00.0 to group 1
> 
> I want both the devices to work simultaneously. However I see only
> one 
> device works at a time.
Can you elaborate how it does not work? Any error messages?

> Can anyone please suggest me to make both the devices to work 
> simultaneously?
> 
The iommu tells you that it cannot properly isolate them from each
other, by putting them into the same group. Therefore, use them
together in the same guest VM. (Are there more devices in group 1?)

kind regards, Arjen