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[Xen-devel] xen EFI boot and vga-passthrough


  • To: "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>
  • From: Kristian Hagsted Rasmussen <kristian@xxxxxxxxxx>
  • Date: Mon, 12 Nov 2012 19:08:05 +0000
  • Accept-language: da-DK, en-US
  • Delivery-date: Mon, 12 Nov 2012 19:08:49 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xen.org>
  • Thread-index: Ac3BCUwxBONJB3zmT1y62jykNdtmkQ==
  • Thread-topic: 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.

 

Kind regards Kristian Hagsted Rasmussen

 

Attachment: windows-domU.log
Description: windows-domU.log

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