[dpdk-dev] Query : Does Binding with vfio-pci is supported inside qemu-kvm guest/vm instance.?

Jason Wang jasowang at redhat.com
Tue Mar 12 10:54:39 CET 2019

On 2019/3/12 下午5:42, Thanneeru Srinivasulu wrote:
> Thanks Bruce..
> On Tue, Mar 12, 2019 at 3:08 PM Bruce Richardson
> <bruce.richardson at intel.com> wrote:
>> On Tue, Mar 12, 2019 at 10:57:55AM +0530, Thanneeru Srinivasulu wrote:
>>> Hi Everyone.
>>> I did attached pice  to Guest VM using vfio-pci with qemu command, and then
>>> tried binding the pcie bdf with vfio-pci, observing binding failure with
>>> vfio-pci.
>>> Where as when tryied with igb_uio, everything works fine.
>>> Does Binding with vfio-pci is supported inside VM/guest?
>> vfio support requires the presence of an IOMMU, and you generally don't
>> have an IOMMU available in a VM.
>> /Bruce

Actually, Qemu support vIOMMU + VFIO in guest[1], all you need is to add 
a intel IOMMU and enabling caching mode.





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