Re: [Xen-devel] [Qemu-devel] Xen 4.4 with qemu 1.6.2 VGA passthru NVIDIA

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

CC'ing xen-devel.

Could you please post your QEMU logs?


On Mon, 23 Jun 2014, Maxim Gordeev wrote:
> Hi!
> 
> Please, give me an advice.
> 
> I try use VGA passthough NVidia k40 on SuperMicro Server, but server is
> having error.
> My Xen is using qemu (a9e8aeb3755bccb7b51174adcf4a3fc427e0d147)2.0.0
> 
> My VirtualMachine is have config:
> device_model_version = "qemu-xen"
> device_model_override =
> "/opt/sources/qemu-a9e8aeb/x86_64-softmmu/qemu-system-x86_64"
> 
> When I start VM:
> dmesg
> [ 0.906181] pci 0000:00:05.0: BAR 1: can't assign mem pref (size
> 0x100000000)
> [ 0.906187] pci 0000:00:05.0: BAR 1: trying firmware assignment [mem
> 0x100000000-0x1ffffffff 64bit pref]
> [ 0.906193] pci 0000:00:05.0: BAR 1: assigned [mem
> 0x100000000-0x1ffffffff 64bit pref]
> and lspci -s 00:05.0 -vvv
>         Region 0: Memory at 85000000 (32-bit, non-prefetchable) [size=16M]
>         Region 1: Memory at 100000000 (64-bit, prefetchable) [size=4G]
>         Region 3: Memory at 82000000 (64-bit, prefetchable) [size=32M]
> 
> Why?
> 
> This is message in DOM0:
> lspci -s 03:00.0 -vvv
> ....
> Region 0: Memory at de000000 (32-bit, non-prefetchable) [size=16M]
> Region 1: Memory at 5800000000 (64-bit, prefetchable) [size=16G]
> Region 3: Memory at 5c00000000 (64-bit, prefetchable) [size=32M]
> 
> Why Qemu don`t mapping BAR1?
> Thanks!
> Regards!
> 

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