On Tue, Mar 12, 2019 at 05:54:39PM +0800, Jason Wang wrote: > > 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.richard...@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. > > Thanks > > > [1] > > https://www.lfasiallc.com/wp-content/uploads/2017/11/Device-Assignment-with-Nested-Guests-and-DPDK_Peter-Xu.pdf > Thanks for the info.
/Bruce
