On 2015-01-28 16:36, Alex Williamson wrote: > On Wed, 2015-01-28 at 16:02 +0100, Jan Kiszka wrote: >> Hi Alex, >> >> before getting dirty fingers in vain: what is the current status of >> handing an IGD GPU to a KVM guest, specifically Windows? I found some >> related QEMU patches from last year on the list, but it seems they >> didn't progress. Are there open issues without known solutions or is it >> "just" about putting pieces together - given that there related patches >> for Xen floating around? > > Hi Jan, > > The patches submitted last year by Andrew Barnes are functional (AFAIK), > but mostly proof-of-concept quality. They make use of /dev/mem in place > of designing VFIO interfaces, they hack into various chipset code, etc. > Based on the attempts to port the Xen IGD code into QEMU, I think Intel > was working on reducing the machine level impact of IGD assignment with > a "universal" driver, but I haven't seen any status updates on that for > some time. If Intel is successful in creating such a driver, then IGD > assignment may be no more complicated that discrete assignment (but > might only support very new HW). To support current hardware and > drivers, we need to expose not only the IGD device, but manipulate > chispet device IDs and punch through registers and opregions on other > devices. Andrew's patches do this, but need help to architect > interfaces and break down the code into upstream-able chunks. Thanks,
OK, thanks. Need to study more details then. Jan -- Siemens AG, Corporate Technology, CT RTC ITP SES-DE Corporate Competence Center Embedded Linux
