[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel
On 11/19/2015 11:52 PM, Alex Williamson wrote: On Thu, 2015-11-19 at 15:32 +0000, Stefano Stabellini wrote:On Thu, 19 Nov 2015, Jike Song wrote:Hi Alex, thanks for the discussion. In addition to Kevin's replies, I have a high-level question: can VFIO be used by QEMU for both KVM and Xen?No. VFIO cannot be used with Xen today. When running on Xen, the IOMMU is owned by Xen.Right, but in this case we're talking about device MMUs, which are owned by the device driver which I think is running in dom0, right? This proposal doesn't require support of the system IOMMU, the dom0 driver maps IOVA translations just as it would for itself. We're largely proposing use of the VFIO API to provide a common interface to expose a PCI(e) device to QEMU, but what happens in the vGPU vendor device and IOMMU backends is specific to the device and perhaps even specific to the hypervisor. Thanks, Let me conclude this, and please correct me in case of any misread: the vGPU interface between kernel and QEMU will be through VFIO, with a new VFIO backend (instead of the existing type1), for both KVMGT and XenGT? Alex -- Thanks, Jike _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |