Re: [Qemu-devel] Query on VFIO in Virtual machine

2017-06-22 Thread Peter Xu
On Thu, Jun 22, 2017 at 11:27:09AM -0600, Alex Williamson wrote: > On Thu, 22 Jun 2017 22:42:19 +0530 > Nitin Saxena wrote: > > > Thanks Alex. > > > > >> Without an iommu in the VM, you'd be limited to no-iommu support for VM > > >> userspace, > > So are you trying to say VFIO NO-IOMMU should

Re: [Qemu-devel] Query on VFIO in Virtual machine

2017-06-22 Thread Alex Williamson
On Thu, 22 Jun 2017 22:42:19 +0530 Nitin Saxena wrote: > Thanks Alex. > > >> Without an iommu in the VM, you'd be limited to no-iommu support for VM > >> userspace, > So are you trying to say VFIO NO-IOMMU should work inside VM. Does > that mean VFIO NO-IOMMU in VM and VFIO IOMMU in host for

Re: [Qemu-devel] Query on VFIO in Virtual machine

2017-06-22 Thread Nitin Saxena
Thanks Alex. >> Without an iommu in the VM, you'd be limited to no-iommu support for VM >> userspace, So are you trying to say VFIO NO-IOMMU should work inside VM. Does that mean VFIO NO-IOMMU in VM and VFIO IOMMU in host for same device is a legitimate configuration? I did tried this configurati

Re: [Qemu-devel] Query on VFIO in Virtual machine

2017-06-22 Thread Alex Williamson
[cc +qemu-devel, +peterx] On Thu, 22 Jun 2017 22:18:06 +0530 Nitin Saxena wrote: > Hi, > > I have a PCI device connected as an endpoint to Intel host machine. > The requirement is to run dpdk like user space data path application > in VM using PCI PF passthrough (SRIOV disabled). This applicati