----- On 18 Oct, 2016, at 21:03, Marek Marczykowski-Górecki marma...@invisiblethingslab.com wrote:
> On Tue, Oct 18, 2016 at 04:52:29PM -0400, Konrad Rzeszutek Wilk wrote: >> On Tue, Oct 18, 2016 at 03:53:31AM +0200, Marek Marczykowski-Górecki wrote: >> > HVM domains use IOMMU and device model assistance for communicating with >> > PCI devices, xen-pcifront/pciback is used only in PV domains. >> > When HVM domain has device model in stubdomain, attaching xen-pciback to >> > the target domain itself is not only useless, but also may prevent >> > attaching xen-pciback to the stubdomain, effectively breaking PCI >> > passthrough. >> >> This has the consequence that the "reset" of the device that >> pciback does will no longer be done. >> >> That is the FLR functionality will not be exercised anymore. > > Are you sure about that? libxl__device_pci_add calls > libxl__device_pci_reset, regardless of my patch. does this mean that you don't need a FLR+ capable graphics card for pass-throu ? that is what is stopping me from doing a passthrou - my goal is to have my Desktop on a VM start an X-Server with direct access to the gfx with according performance I use this one with passive cooling 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde PRO [Radeon HD 7750/8740 / R7 250E] Juergen are you the same Marek from Qubes? _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
