Hi,
On 27.05.2011 13:09, Jan Kiszka wrote:
On 2011-05-27 07:32, André Weidemann wrote:
Here is my setup:
Intel DX58SO
Core i7 920
Radeon HD 6950
Kernel 2.6.35.7
qemu-kvm git pull from May 26th
One thing that is not working is the pass-through of a second device, a
sound card in my case. As soon as I pass 2 devices to the VM, Windows
does not boot anymore.
If I continue and remove the second device from the command line the VM
does not boot anymore with the passed through gfx card. The graphics
card drivers crashes Windows, with the error message of not being able
to reset the graphics card. A reboot of the host cures this problem.
Does it make a difference when you preserve the function address by
specifying -device pci-assign,host=03:00.0,addr=XX.0 and -device
pci-assign,host=03:00.1,addr=XX.1 (where XX is some free slot number in
the guest)?
I did some further testing in assigning both the VGA and the sound card.
If I pass the devices to the VM like this:
-device pci-assign,host=03:00.0,addr=0x4 \ #VGA
-device pci-assign,host=00:1b.0,addr=0x5 \ #Sound
Windows boots up, but the sound card is not visible as a device inside
the VM.
Running "info pci" in the monitor shows this:
Bus 0, device 4, function 0:
VGA controller: PCI device 1002:6719
IRQ 11.
BAR0: 32 bit prefetchable memory at 0xe0000000 [0xefffffff].
BAR2: 32 bit memory at 0xfeba0000 [0xfebbffff].
BAR4: I/O at 0xc000 [0xc0ff].
BAR6: 32 bit memory at 0xffffffffffffffff [0x0001fffe].
id ""
Bus 0, device 5, function 0:
Audio controller: PCI device 8086:3a3e
IRQ 10.
BAR0: 32 bit memory at 0xffffffffffffffff [0x00003ffe].
id ""
If I switch the order of the two devices to this:
-device pci-assign,host=00:1b.0,addr=0x4 \ #Sound
-device pci-assign,host=03:00.0,addr=0x5 \ #VGA
I get the following error and kvm crashes:
http://pastebin.com/KmKEqhWK
It looks like the free PCI memory was not enough to assign the graphics
card after assigning the sound card.
If I only assign the sound card, then "info pci" in the monitor looks
like this:
Bus 0, device 4, function 0:
Audio controller: PCI device 8086:3a3e
IRQ 10.
BAR0: 32 bit memory at 0xfebf0000 [0xfebf3fff].
id ""
The device is then visible inside the VM and working.
If I am not mistaken then the graphics card needs 2 bars, one with 256MB
and one with 128K. The sound card then needs 1 bar with 16K of PCI memory.
How big is the PCI memory with seabios?
Is there really not enough space to "squeeze" in those extra 16K?
Regards
André
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