[Intel-gfx] [RFC 01/10] drm/i915/gvt: add module parameter enable_pvmmio

[Zhang, Xiaolin]

On 09/27/2018 07:03 PM, Joonas Lahtinen wrote:
> Quoting Xiaolin Zhang (2018-09-27 19:37:46)
>> This int type module parameter is used to control the different
>> level pvmmio feature for MMIO emulation in GVT.
>>
>> This parameter is default zero, no pvmmio feature enabled.
>>
>> Its permission type is 0400 which means user could only change its
>> value through the cmdline, this is to prevent the dynamic modification
>> during runtime which would break the pvmmio internal logic.
>>
>> Signed-off-by: Xiaolin Zhang <xiaolin.zhang at intel.com>
> This shouldn't really be a module parameter. We should detect the
> capability from the vGPU device and use it always when possible.
>
> Regards, Joonas
>
for pv optimization, we should touch both guest driver and GVTg.  this
parameter is used for

guest pv capability because GVTg with pv capability will support both pv
and non pv capability guest.

BRs, Xiaolin