Fwd: Re: Xen 4.3 / 4.4 - concurrent APIs, VGA Passthru

[Georg Bege <therion@ninth-art.de>]

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Im forwading my email, to the mailing list again -
maybe someone else has something to contribute to my problem.

Nobody else would know better, except the developers themselfs. ;)


-------- Original-Nachricht --------
Betreff: 	Re: [Xen-devel] Xen 4.3 / 4.4 - concurrent APIs, VGA Passthru
Datum: 	Mon, 28 Jul 2014 05:14:22 +0200
Von: 	Georg Bege <therion@ninth-art.de>
Antwort an: 	therion@ninth-art.de
An: 	jacek burghardt <jaceksburghardt@gmail.com>



Hi

Thanks for your response, I can imagine hundred of people asked the same
questions already -
but as said it was hard to get an up to date documentation about this.
However I did experiment more with it, my graphics card is an GeForce
GTX470.
I came to the conclusion that passthru works great with XP (both 32bit
and 64bit) but giving me issue's whenever Im trying on Windows 7 64bit.

It seems that vga passthru doesnt work for the newer qemu-xen model
(using Qemu 2.0.0), so Im using
qemu-xen-traditional along with the old bundled qemu-dm which works fine
for XP.

I'll attach my hvm config Im using right now - I'll basically use it for
both XP and Win7.
I've also a different HVM for other HVM's where I rather use qemu 2.0.0
and Spice, but this is a different topic (nothing todo with VGA Passthru).
Basically Im on Gentoo and using Xen 4.4.0-r7, but changed the xen-tools
ebuild slightly as it would not build the traditional qemu by default.

So any idea why this is not working right for Win7?
Win7 also seems to be a lot slower with qemu-xen-traditional, is that a
bug in the old model?

regards,
Georg

Am 28.07.2014 04:47, schrieb jacek burghardt:
> Well we all pass our video cards as secondary display.  *gfx_passtru
> does not work. What video card do you have ?*
>
>




[-- Attachment #2: Win7gaming.hvm --]
[-- Type: text/plain, Size: 648 bytes --]

name = "Win7gaming"
builder = "hvm"
uuid = "9f9a391d-23d0-49c2-bd5e-47c6ad4ca104"
maxmem = 8192
memory = 8192
shadow_memory = 32
pae = 1
apic = 1
acpi = 1
vcpus = 4
nomigrate = 1
xen_platform_pci = 1
pci_msitranslate = 0
pci_power_mgmt = 1
device_model_version = "qemu-xen-traditional"
device_model_override = "/usr/lib/xen/bin/qemu-dm"
vif = [ 'bridge=xenbr0,mac=00:16:3e:06:48:60' ]
disk = ['phy:/dev/zvol/vdisks/Win7gaming,hda,w']
boot = "c"
sdl = 0
vnc = 1
vnclisten = '127.0.0.1'
stdvga = 0
audio = 0
localtime = 1
on_crash = 'destroy'
on_reboot = 'restart'
usb = 1
usbdevice = 'tablet'
keymap = 'de'
gfx_passthru=0
pci=['03:00.0', '03:00.1']

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