Re: VGA Passthrough crashes machine

[Konrad Rzeszutek Wilk <konrad@darnok.org>]

On Thu, Dec 08, 2011 at 12:00:07PM +0000, Anthony Wright wrote:
> I've just had my first attempt at getting VGA passthrough to work, and
> it crashed the machine. I'm trying to understand whether this is a
> problem with my hardware, configuration or a software problem.
> 
> I'm running Xen 4.1.2 with Linux 3.1.2
> 
> 
> The CPU is an Intel Core i5-650
> http://ark.intel.com/products/43546/Intel-Core-i5-650-Processor-%284M-Cache-3_20-GHz%29

And what is your motherboard? Does it have VT-d?

> 
> The Video Card is and Intel Core Processor Integrated Graphics Controller
> PCI ID: 8086 0042
> 
> 
> I have hidden the vga device with xen-pciback.hide=(00:02.0) on the
> kernel command line
> 
> The xen config file is:
> name        = '11-1'
> kernel            = '/usr/lib/xen/boot/hvmloader'
> builder           = 'hvm'
> device_model      = '/usr/lib/xen/bin/qemu-dm'
> boot              = 'c'
> serial            = 'pty'
> usbdevice         = 'tablet'
> disk        = [ 'phy:/dev/Master/Root-11-0001,hda,w' ]
> memory      = 1000
> vif         = [
> 'bridge=br-internal,mac=04:fb:7a:22:e8:4a','bridge=br-dmz,mac=04:fb:7a:22:e8:4b','bridge=br-local,mac=04:fb:7a:22:e8:4c'
> ]
> vcpus       = 1
> on_poweroff = 'destroy'
> on_reboot   = 'destroy'
> on_crash    = 'destroy'
> 
> gfx_passthru=1
> pci=['00:02.0']
> 
> When I try to start the DomU I get the following output, I get the
> prompt back and then the system reboots.
> 
> Parsing config file xen-config
> xc: info: VIRTUAL MEMORY ARRANGEMENT:
>   Loader:        0000000000100000->00000000001795d0
>   TOTAL:         0000000000000000->000000003e000000
>   ENTRY ADDRESS: 0000000000100000
> xc: info: PHYSICAL MEMORY ALLOCATION:
>   4KB PAGES: 0x0000000000000200
>   2MB PAGES: 0x00000000000001ef
>   1GB PAGES: 0x0000000000000000
> libxl: error: libxl_pci.c:712:do_pci_add xc_assign_device failed
> Daemon running with PID 2050
> 
> 
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