Re: [Xen-devel] Re: graphics passthrough with VT-d

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

This is probably due to c/s 20137 and now fixed by c/s 20141.

 Thanks,
 Keir

On 31/08/2009 18:03, "djmagee@xxxxxxxxxxxx" <djmagee@xxxxxxxxxxxx> wrote:

> I had the same problem with unpatched xen-unstable that was up-to-date
> this morning.  This was simply in trying to pass through a usb
> controller, to test xen-unstable before I went ahead and applied the gfx
> passthrough patches.
> 
> This seems like a bug in xen-unstable.
> 
> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Christian
> Tramnitz
> Sent: Monday, August 31, 2009 12:48 PM
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] Re: graphics passthrough with VT-d
> 
> I took a snapshot from xen-unstable and applied those patches.
> However when trying to create a HVM domU the following error comes up:
> # xm create test2.xm
> Error: local variable 'str' referenced before assignment
> Using config file "/etc/xen/test2.xm".
> 
> And xend-debug.log gives some more info:
> [2009-08-31 18:10:23 6189] DEBUG (XendDomainInfo:99)
> XendDomainInfo.create(['vm', ['name', 'TEST2'], ['memory', 4096],
> ['vcpus', 8], ['on_xend_start', 'ignore'], ['on_xend_stop', 'ignore'],
> ['uuid', '06ed00ff-1162-4fc4-b5d8-11993ee4a8c0'], ['image', ['hvm',
> ['kernel', '/usr/lib/xen/boot/hvmloader'], ['videoram', 4],
> ['device_model', '/usr/lib/xen/bin/qemu-dm'], ['pae', 1], ['vcpus', 8],
> ['boot', 'c'], ['fda', ''], ['fdb', ''], ['timer_mode', 1],
> ['localtime', 0], ['serial', ''], ['stdvga', 0], ['isa', 0],
> ['nographic', 0], ['soundhw', ''], ['vncunused', 1], ['display',
> ':0.0'], ['xauthority', '/root/.xauthPdEBhy'], ['rtc_timeoffset', 0],
> ['monitor', 0], ['acpi', 1], ['apic', 1], ['usb', 0], ['usbdevice', ''],
> ['keymap', ''], ['pci', [['0x0000', '0x03', '0x00', '0x0', '0x100', [],
> '03:00.0']]], ['hpet', 0], ['guest_os_type', 'default'], ['hap', 1],
> ['cpuid', []], ['cpuid_check', []], ['viridian', 0],
> ['pci_msitranslate', 1], ['vpt_align', 1], ['pci_power_mgmt', 0],
> ['xen_platform_pci', 1], ['gfx_passthru', 2]]], ['s3_integrity', 1],
> ['device', ['vbd', ['uname', 'phy:vgtest/test2'], ['dev', 'xvda'],
> ['mode', 'w']]], ['device', ['pci', ['dev', ['slot', '0x00'], ['domain',
> '0x0000'], ['key', '03:00.0'], ['bus', '0x03'], ['vdevfn', '0x100'],
> ['func', '0x0']]]], ['device', ['vif', ['bridge', 'eth0'], ['mac',
> '00:16:3e:00:00:22'], ['type', 'netfront']]]])
> [2009-08-31 18:10:23 6189] DEBUG (XendDomainInfo:2366)
> XendDomainInfo.constructDomain
> [2009-08-31 18:10:23 6189] DEBUG (balloon:181) Balloon: 4101688 KiB
> free; need 4096; done.
> [2009-08-31 18:10:23 6189] ERROR (XendDomainInfo:467) VM start failed
> Traceback (most recent call last):
>   File "/usr/lib/python2.6/site-packages/xen/xend/XendDomainInfo.py",
> line 452, in start
>     XendTask.log_progress(0, 30, self._constructDomain)
>   File "/usr/lib/python2.6/site-packages/xen/xend/XendTask.py", line
> 209, in log_progress
>     retval = func(*args, **kwds)
>   File "/usr/lib/python2.6/site-packages/xen/xend/XendDomainInfo.py",
> line 2470, in _constructDomain
>     pci_str = str(pci)
> UnboundLocalError: local variable 'str' referenced before assignment
> 
> 
> Is this error related to the patches or is something else broken? I have
> to admit that I've not been using xen-unstable for some time, only
> release-3.4.1 and recently Xenclient, so I don't know if this is also a
> problem on unpatched xen-unstable.
> The error disappears when I omit the "pci=" line, but obviously this is
> not a good scenario to test gfx passthrough ;-)
> 
> 
> My config file for the test-domU:
> kernel = "/usr/lib/xen/boot/hvmloader"
> builder='hvm'
> memory = 4096
> name = "TEST2"
> vcpus=8
> vif = [ 'type=netfront, mac=00:16:3e:ff:ff:22, bridge=eth0' ]
> disk = [ 'phy:vgtest/test2,xvda,w' ]
> #viridian = 1
> device_model = '/usr/lib/xen/bin/qemu-dm'
> #boot="cd"
> #sdl=0
> #opengl=0
> #vnc=1
> #vnclisten="127.0.0.1"
> #vncdisplay=1
> #vncpasswd=''
> #stdvga=0
> gfx_passthru=2
> pci=['03:00.0']
> 
> 
> Thanks,
>    Christian
> 
> 
> Han, Weidong wrote:
>> Teo,
>>  
>> I attached some experimental patches for you to try to sthorugh
> Geforce 
>> 8400 GS.
>>  
>> Based on my patches posted last Friday, pls follow below instructions:
>> 1. apply xen-load-vbios-file.patch to xen-unstable.hg
>>     this patch supports to load vga bios from a file.
>> 2. apply xen-vBAR-pBAR.patch to xen-unstable.hg
>>     this patch is used to 1:1 map between vBAR and pBAR
>> 3. apply qemu-change-for-vBAR-pBAR.patch to ioemu-remote (qemu tree).
>>     this patch is used to 1:1 map between vBAR and pBAR on qemu side
>> 4. apply qemu-claim-cycle-for-secondary-gfx-passthrough.patch
>>     it's needed if you want to assign the secondary gfx to guest.
>> 5. cd xen-unstable.hg
>> 6. make clean
>> 7. copy the vga bios file to
>> xen-unstabl.hg/tools/firmware/vgabios/vgabios-pt.bin
>> 8. make; make install
>> 9. reboot the system. or xend restart. then passthrough gfx to guest
> ...
>>  
>>  
>> Regards,
>> Weidong
> 
> 
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