[Xen-users] GPU passthrough with xen 4.2.1 on ubuntu 12.10

[Matthew Dean <mcd40@xxxxxxxxx>]

Hi all,

I've managed to get a windows 7 x64 hvm to boot and install and I'm now 
looking to pass through a HD 7970 as a secondary GPU.  in order to 
prepare the devices for passthrough I've used
xl pci-assignable-add 83:00.0
xl pci-assignable-add 83:00.1

Where I've identified the device pci ids using lspci.  This works fine 
and the devices appear when I call 'xl pci-assignable-list'. After 
adding them to the vm config (see below) I was able to get the vm to 
boot and the devices appeared in device manager.  Installing the ATI 
drivers however has meant that on further boots the  machine never gets 
past the windows logo in the VNC window and no output is generated from 
the ATI card.  It simply freezes there and the only way I can get back 
into windows is via safe mode, even after uninstalling the ATI software.
Has anybody else experienced similar issues or have any advice as to how 
to get this to work?  I'm a bit stumped and the wiki implies that this 
should 'just work'.
Thank you in advance for any help.

Matt

Here is my machine config

###########################################################

builder='hvm'
memory = 2048
name = 'Windows7Test'

vcpus=4
pae=1
acpi=1
apic=1

disk = [ 'file:/xen-guests/img/windows7Test.img,hda,w' ]
pci = [ '83:00.0' , '83:00.1' ]

on_poweroff = 'destroy'
on_reboot   = 'restart'
on_crash    = 'destroy'

boot='cd'

sdl=0
vnc=1
vncconsole=0
vncpasswd=''
vnclisten='172.24.226.84'

stdvga=0

serial='pty'
usbdevice='tablet'

gfx_passthru=0
pci_power_mgmt=1
xen_platform_pci=1
pci_msitranslate=1
viridian=1
hpet=1

############################################################

And the vm produces the following qemu log in /var/log/xen/

############################################################

domid: 4
-videoram option does not work with cirrus vga device model. Videoram 
set to 4M.
Strip off blktap sub-type prefix to /xen-guests/img/windows7Test.img 
(drv 'aio')
Using file /xen-guests/img/windows7Test.img in read-write mode
Watching /local/domain/0/device-model/4/logdirty/cmd
Watching /local/domain/0/device-model/4/command
Watching /local/domain/4/cpu
char device redirected to /dev/pts/3
qemu_map_cache_init nr_buckets = 10000 size 4194304
shared page at pfn feffd
buffered io page at pfn feffb
Guest uuid = e09f5a51-7de1-4d92-9cec-826b9d66aeb6
populating video RAM at ff000000
mapping video RAM from ff000000
Register xen platform.
Done register platform.
platform_fixed_ioport: changed ro/rw state of ROM memory area. now is rw 
state.
xs_read(/local/domain/0/device-model/4/xen_extended_power_mgmt): read error
Log-dirty: no command yet.
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
vcpu-set: watch node error.
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
xs_read(/local/domain/4/log-throttling): read error
qemu: ignoring not-understood drive `/local/domain/4/log-throttling'
medium change watch on `/local/domain/4/log-throttling' - unknown 
device, ignored
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
dm-command: hot insert pass-through pci dev
register_real_device: Assigning real physical device 83:00.0 ...
register_real_device: Enable MSI translation via per device option
register_real_device: Enable power management
pt_iomul_init: Error: pt_iomul_init can't open file /dev/xen/pci_iomul: 
No such file or directory: 0x83:0x0.0x0
pt_register_regions: IO region registered (size=0x10000000 
base_addr=0xe000000c)
pt_register_regions: IO region registered (size=0x00040000 
base_addr=0xf0000004)
pt_register_regions: IO region registered (size=0x00000100 
base_addr=0x0000f001)
pt_register_regions: Expansion ROM registered (size=0x00020000 
base_addr=0xf0040000)
pt_msi_setup: msi mapped with pirq 67
pci_intx: intx=1
register_real_device: Real physical device 83:00.0 registered successfuly!
IRQ type = MSI-INTx
dm-command: hot insert pass-through pci dev
register_real_device: Assigning real physical device 83:00.1 ...
register_real_device: Enable MSI translation via per device option
register_real_device: Enable power management
pt_iomul_init: Error: pt_iomul_init can't open file /dev/xen/pci_iomul: 
No such file or directory: 0x83:0x0.0x1
pt_register_regions: IO region registered (size=0x00004000 
base_addr=0xf0060004)
pt_msi_setup: msi mapped with pirq 66
pci_intx: intx=2
register_real_device: Real physical device 83:00.1 registered successfuly!
IRQ type = MSI-INTx
pt_iomem_map: e_phys=e0000000 maddr=e0000000 type=8 len=268435456 
index=0 first_map=1
cirrus vga map change while on lfb mode
pt_iomem_map: e_phys=f3000000 maddr=f0000000 type=0 len=262144 index=2 
first_map=1
pt_iomem_map: e_phys=f3060000 maddr=f0060000 type=0 len=16384 index=0 
first_map=1
pt_ioport_map: e_phys=c100 pio_base=f000 len=256 index=4 first_map=1
mapping vram to f0000000 - f0400000
platform_fixed_ioport: changed ro/rw state of ROM memory area. now is rw 
state.
platform_fixed_ioport: changed ro/rw state of ROM memory area. now is ro 
state.
pt_pci_read_config: [00:04:0] Error: Failed to read register with 
invalid access size alignment. [Offset:0eh][Length:4]
pt_pci_read_config: [00:04:0] Error: Failed to read register with 
invalid access size alignment. [Offset:0eh][Length:4]
pt_pci_read_config: [00:04:0] Error: Failed to read register with 
invalid access size alignment. [Offset:0eh][Length:4]
pt_pci_read_config: [00:04:0] Error: Failed to read register with 
invalid access size alignment. [Offset:0eh][Length:4]
pt_pci_read_config: [00:04:0] Error: Failed to read register with 
invalid access size alignment. [Offset:0eh][Length:4]
pt_pci_read_config: [00:04:0] Error: Failed to read register with 
invalid access size alignment. [Offset:0eh][Length:4]
pt_pci_read_config: [00:04:0] Error: Failed to read register with 
invalid access size alignment. [Offset:0eh][Length:4]
pt_pci_read_config: [00:05:0] Error: Failed to read register with 
invalid access size alignment. [Offset:0eh][Length:4]
pt_pci_read_config: [00:05:0] Error: Failed to read register with 
invalid access size alignment. [Offset:0eh][Length:4]
pt_pci_read_config: [00:05:0] Error: Failed to read register with 
invalid access size alignment. [Offset:0eh][Length:4]
pt_pci_read_config: [00:05:0] Error: Failed to read register with 
invalid access size alignment. [Offset:0eh][Length:4]
pt_pci_read_config: [00:05:0] Error: Failed to read register with 
invalid access size alignment. [Offset:0eh][Length:4]
pt_pci_read_config: [00:05:0] Error: Failed to read register with 
invalid access size alignment. [Offset:0eh][Length:4]
pt_pci_read_config: [00:05:0] Error: Failed to read register with 
invalid access size alignment. [Offset:0eh][Length:4]
pt_iomem_map: e_phys=ffffffff maddr=e0000000 type=8 len=268435456 
index=0 first_map=0
pt_iomem_map: e_phys=ffffffff maddr=f0000000 type=0 len=262144 index=2 
first_map=0
pt_ioport_map: e_phys=ffff pio_base=f000 len=256 index=4 first_map=0
pt_iomem_map: e_phys=e0000000 maddr=e0000000 type=8 len=268435456 
index=0 first_map=0
pt_iomem_map: e_phys=f3000000 maddr=f0000000 type=0 len=262144 index=2 
first_map=0
pt_ioport_map: e_phys=c100 pio_base=f000 len=256 index=4 first_map=0
pt_iomem_map: e_phys=ffffffff maddr=f0060000 type=0 len=16384 index=0 
first_map=0
pt_iomem_map: e_phys=f3060000 maddr=f0060000 type=0 len=16384 index=0 
first_map=0
pt_iomem_map: e_phys=ffffffff maddr=e0000000 type=8 len=268435456 
index=0 first_map=0
pt_iomem_map: e_phys=ffffffff maddr=f0000000 type=0 len=262144 index=2 
first_map=0
pt_ioport_map: e_phys=ffff pio_base=f000 len=256 index=4 first_map=0
pt_iomem_map: e_phys=e0000000 maddr=e0000000 type=8 len=268435456 
index=0 first_map=0
pt_iomem_map: e_phys=f3000000 maddr=f0000000 type=0 len=262144 index=2 
first_map=0
pt_ioport_map: e_phys=c100 pio_base=f000 len=256 index=4 first_map=0
pt_msgctrl_reg_write: guest enabling MSI, disable MSI-INTx translation
pci_intx: intx=1
pt_msi_disable: Unmap msi with pirq 67
pt_msgctrl_reg_write: setup msi for dev 20
pt_msi_setup: msi mapped with pirq 67
pt_msi_update: Update msi with pirq 67 gvec b0 gflags 130f
pt_iomem_map: e_phys=ffffffff maddr=f0060000 type=0 len=16384 index=0 
first_map=0
pt_iomem_map: e_phys=f3060000 maddr=f0060000 type=0 len=16384 index=0 
first_map=0
######################################################################

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