Re: [PATCH v3 2/6] libxl: do not add a vkb backend to hvm guests

["Roger Pau Monné" <roger.pau@citrix.com>]

El 01/07/15 a les 12.56, Stefano Stabellini ha escrit:
> On Wed, 1 Jul 2015, Roger Pau Monné wrote:
>> El 01/07/15 a les 12.29, Stefano Stabellini ha escrit:
>>> Given that xen-fbfront is likely to go away for HVM guests, I wouldn't
>>> be opposed to stop the driver initialization in Linux on x86/HVM. Unless
>>> Roger's work on HVMlite is going to need xen-fbfront again, but in that
>>> case we'll be able to distinguish a regular HVM guest from an HVMlite
>>> guest, I think.
>>
>> I haven't get to that point yet, but yes, it seems useful for HVMlite
>> guests because we won't have an emulated VGA card any more.
>>
>> HVMlite guest can be easily identified because they set the device model
>> to none:
>>
>> device_model_version == LIBXL_DEVICE_MODEL_VERSION_NONE
> 
> What about the guest side? Are they going to be hvm guests from Linux
> POV? Or something else?

That's not set on stone, they could certainly be HVM guests depending on
the implementation that each OS has.

IMHO from a guest POV the interface exposed is very similar to PVH, so
in order to ease the implementation I think they should be considered
PVH guests from Linux POV, we can always move them to being HVM guests
later if needed.

Roger.


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