Fabio Fantoni wrote on 2014-05-19: > Il 19/05/2014 08:44, Gerd Hoffmann ha scritto: >> Hi, >>> + /* + * Some video bioses and gfx drivers will assume the bdf >>> of IGD is 00:02.0. + * So user need to set it to 00:02.0 in Xen >>> configure file explicitly, + * otherwise IGD will fail to work. + >>> */ + pci_reserve_pci_devfn(b, PCI_DEVFN(2, 0)); >> That is asking for trouble. Slot 2 is used by the qemu vga cards by >> default, and for quite a while (before memory api was merged) it even >> was impossible to change it. libvirt still places the vga card at slot >> 2 for that reason -> boom. I wouldn't be surprised if you find that >> assumption in other management libs / apps too. >> >> Why do you need that patch in the first place? It should be possible to >> configure qemu to not occupy slot 2 if you need it that way. Just pass >> '-vga none' to qemu. Which you probably want anyway if you pass-through >> a vga to the guest. And explicitly configure a slot (via addr= >> property) for all your pci devices. Doing it only for the IGD works too >> if you list the device before any other pci device on the qemu command >> line. >> >> cheers, >> Gerd > > I already added vga none support on libxl, useful also for this cases: > http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=2e5738ff47b9d2e19480 > 24100f87b1a25fcf004a
Thanks for provide such useful information to us. I will try to see whether it can meet our demand. > > This patch is already tested and working, for now I not tested and I > can't test with intel gpu passthrough, someone can test it with intel > gpu passthrough? > > Thanks for any reply and sorry for my bad english. > >> >> >> >> _______________________________________________ >> Xen-devel mailing list >> xen-de...@lists.xen.org >> http://lists.xen.org/xen-devel Best regards, Yang
