Re: VGA passthrough on unstable

[Liwei <xieliwei@gmail.com>]

On 6 May 2011 02:49, Pasi Kärkkäinen <pasik@iki.fi> wrote:
> Ok, so maybe you should rebuild a kernel with PASS instead of VPCI ..
> (to get matching PCI IDs in the VM).

Back with a newly compiled 2.6.32.39 from Jeremy's 2.6.32.x branch.
(Was stuck for days trying to get Konrad's 2.6.39 branch to work as
dom0 only to realise that its not supported yet) Also upgraded xen to
yesterday's revision.

Nothing seems to have changed. I'm still getting:
pt_pci_read_config: Error: Failed to read register with invalid access
size alignment. [00:05.0][Offset:0eh][Length:4]
pt_pci_read_config: Error: Failed to read register with invalid access
size alignment. [00:06.0][Offset:0eh][Length:4]

The PCI IDs did not change even though I've switched PCIDEV to pass:
# cat /boot/config-2.6.32.39 |grep PCIDEV
CONFIG_XEN_PCIDEV_FRONTEND=y
CONFIG_XEN_PCIDEV_BACKEND=y
# CONFIG_XEN_PCIDEV_BACKEND_VPCI is not set
CONFIG_XEN_PCIDEV_BACKEND_PASS=y
# CONFIG_XEN_PCIDEV_BACKEND_SLOT is not set
# CONFIG_XEN_PCIDEV_BACKEND_CONTROLLER is not set
# CONFIG_XEN_PCIDEV_BE_DEBUG is not set

With the following config, I managed to prevent the vm from
continuously rebooting, but it just stays at the pulsating windows
logo doing nothing:
W7Test                                       9  4087     1     -b----      37.9

builder='hvm'
memory = 4096
vcpus = 1
shadow_memory = 32
name = "W7Test"
vif = [ 'type=ioemu, bridge=xenbr0' ]
viridian = 1
acpi = 1
apic = 1
pae = 1
hpet = 1
hap = 1
disk = [ 'phy:/dev/mapper/VMStore-W7Test,hdb,w', 'file:/w7.iso,hda:cdrom,r' ]
boot="cd"
sdl=0
vnc=1
vncconsole=1
vncpasswd=''
serial='pty'
usbdevice='tablet'
gfx_passthru = 1
pci = [ '01:00.0', '01:00.1' ]
pci_msitranslate = 1