Re: [Xen-devel] Need advice to develop some libxl patches

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Thu, 31 Jan 2013, Fabio Fantoni wrote:
> I tested spice vdagent, spice audio and spice usbredirection with qemu
> upstream and xen-unstable manually, is all working.
> I'm start to write some patches to have all spice features on xen 4.3.
> 
> About vdagent probably no problem.
> 
> About spice audio on test I actually set this variable manually:
> 
> export QEMU_AUDIO_DRV=spice
> 
> I need know how to setup this env variable but for a given hvm domU start.
> In other word I need to set this env variable on a per domU basis (if
> spiceaudio if setted in cfg).

Pass it from libxl, after all QEMU is spawned by libxl


> About usb redirection the qemu parameters to add are similar to this:
> 
> device_model_args=["-readconfig","/etc/xen/ich9-ehci-uhci.cfg","-chardev","spicevmc,name=usbredir,id=usbredirchardev1","-device","usb-redir,chardev=usbredirchardev1,id=usbredirdev1,bus=ehci.0,debug=3","-chardev","spicevmc,name=usbredir,id=usbredirchardev2","-device","usb-redir,chardev=usbredirchardev2,id=usbredirdev2,bus=ehci.0,debug=3","-chardev","spicevmc,name=usbredir,id=usbredirchardev3","-device","usb-redir,chardev=usbredirchardev3,id=usbredirdev3,bus=ehci.0,debug=3"]
> 
> Probably is not good point to external generic file (on my test
> /etc/xen/ich9-ehci-uhci.cfg), someone can tell me the best way for do this?

Add the paramter list to libxl


> About xl cfg parameters can be good add spiceaudio=0|1 and
> spiceusbredirection=0|1 both with default 0?
 
Yes, it looks OK to me

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