On 01/06/2012 01:31 AM, André Weidemann wrote:
On 06.01.2012 08:25, Gordon Messmer wrote:
Well, I finally figured out that I have to enable the reading of roms
from the device by writing "1" to the "rom" node in /sys/. Now the
problem is that the rom is 64k, and only 32k are making it into the
guest. I saw a reference to this problem here:
Do you have the ROM as a file on your HDD perhaps? If so, you can try
the following: -device pci-assign,host=05:00.0,romfile=${ROMFILE}.
This used to work fine for me even with ROM file of around 130k.
I do, and I'm actually using that. I'm using a shell script wrapper to
"fix" the argument for the PCI video card, since libvirt XML doesn't
seem to provide an option for rom files. The command that gets run is
included below.
I've learned that I was actually incorrect about the problem. The card
in the guest *does* have a 32K rom, but it's not a truncated version of
the ATI rom. Instead, it's the "Plex86/Bochs VGABios (PCI)." I've
tried starting the guest with no graphics or video hardware specified in
the libvirt XML, but qemu-kvm just eats a bunch of CPU time. I don't
see any serial console output (I do see grub and kernel output on the
serial console when I have virtual video hardware specified), so I'm
pretty sure the guest isn't actually starting.
/usr/libexec/qemu-kvm -S -M rhel6.2.0 -enable-kvm -m 4096 -smp
4,sockets=4,cores=1,threads=1 -name herald -uuid
556638be-ee50-e2f6-1d22-37b98b63b8d1 -nodefconfig -nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/herald.monitor,server,nowait
-mon chardev=charmonitor,id=monitor,mode=readline -rtc base=utc -drive
file=/dev/mapper/VolGroup-lv_vm_herald,if=none,id=drive-virtio-disk0,format=raw,cache=none,aio=native
-device
virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
-device
virtio-net-pci,vlan=0,id=net0,mac=52:54:00:21:e7:9e,bus=pci.0,addr=0x3
-net tap,fd=25,vlan=0,name=hostnet0 -chardev pty,id=charserial0 -device
isa-serial,chardev=charserial0,id=serial0 -usb -device
usb-tablet,id=input0 -vnc 127.0.0.1:0 -vga cirrus -device
pci-assign,host=00:14.2,id=hostdev0,configfd=26,bus=pci.0,addr=0x5
-device
pci-assign,host=05:00.0,id=hostdev1,configfd=27,bus=pci.0,addr=0x7,romfile=/var/lib/libvirt/images/Radeon3470.rom
-device usb-host,hostbus=5,hostaddr=3,id=hostdev2 -device
usb-host,hostbus=7,hostaddr=3,id=hostdev3 -device
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6
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