[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] xen EFI boot and vga-passthrough
Hi all I can't seem to find any information on vga-passthrough when booting through xen.efi, so I assume it should work. But I encounter a problem on a windows 7 HVM that boots fine when dom0 is booted through MBR but fails when dom0 is booted through UEFI. My system is: DQ77KB motherboard with bios version 44 Core i7-3779T with VT-d Intel HD graphics 4000 In the qemu log it seem like xen cannot reach the vga-bios. Is this a known problem when booting through xen.efi or is it a bug? dm-command: hot insert pass-through pci dev register_real_device: Assigning real physical device 00:02.0 ... register_real_device: Disable MSI translation via per device option register_real_device: Disable power management pt_iomul_init: Error: pt_iomul_init can't open file /dev/xen/pci_iomul: No such file or directory: 0x0:0x2.0x0 pt_register_regions: IO region registered (size=0x00400000 base_addr=0xf7000004) pt_register_regions: IO region registered (size=0x10000000 base_addr=0xe000000c) pt_register_regions: IO region registered (size=0x00000040 base_addr=0x0000f001) setup_vga_pt: vga bios size (0x0) is invalid! register_real_device: Setup VGA BIOS of passthroughed gfx failed! Log file is attached. Just compared a log file from efi boot to one from MBR boot and found this discrepancy between the two: pt_register_regions: IO region registered (size=0x00400000 base_addr=0xdfc00004) - MBR boot see last addr 0xdfc00004 pt_register_regions: IO region registered (size=0x00400000 base_addr=0xf7000004) - EFI boot compare to MBR 0xf7000004 Kind regards Kristian Hagsted Rasmussen Attachment:
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