Re: [vfio-users] P2P DMA between endpoint devices inside a VM

2020-09-08 Thread Maran Wilson
On Tue, Sep 8, 2020 at 10:22 AM Alex Williamson wrote: > On Tue, 8 Sep 2020 09:59:46 -0700 > Maran Wilson wrote: > > > I'm trying to use the vfio-pci driver to pass-through two PCIe endpoint > > devices into a VM. On the host, each of these PCIe endpoint devices is in &g

[vfio-users] P2P DMA between endpoint devices inside a VM

2020-09-08 Thread Maran Wilson
I'm trying to use the vfio-pci driver to pass-through two PCIe endpoint devices into a VM. On the host, each of these PCIe endpoint devices is in its own IOMMU group. From inside the VM, I would like to perform P2P DMA operations. So basically, programming the DMA engine of one of the devices to

Re: [vfio-users] P2P DMA between endpoint devices inside a VM

2020-09-23 Thread Maran Wilson
On Tue, Sep 8, 2020 at 1:14 PM Alex Williamson wrote: > On Tue, 8 Sep 2020 11:31:42 -0700 > Maran Wilson wrote: > > > On Tue, Sep 8, 2020 at 10:22 AM Alex Williamson < > alex.william...@redhat.com> > > wrote: > > > > > On Tue, 8 Sep 2020 09:59:46 -0700

Re: [vfio-users] P2P DMA between endpoint devices inside a VM

2020-09-23 Thread Maran Wilson
On Wed, Sep 23, 2020 at 2:19 PM Alex Williamson wrote: > On Wed, 23 Sep 2020 13:08:10 -0700 > Maran Wilson wrote: > > > Just wanted to wrap up this thread by confirming what Alex said is true > (in > > case anyone else is interested in this topic in the future). Af