[Intel-gfx] [PATCH] drm/i915/gvt: disable GVT-g if host GuC submission is enabled

[Joonas Lahtinen]

+ Daniel

On ke, 2017-05-03 at 16:36 +0800, Zhenyu Wang wrote:
> On 2017.05.02 16:58:31 +0800, Chuanxiao Dong wrote:
> > 
> > Currently GVT-g cannot work properly when host GuC submission
> > is enabled, so disable GVT in this case.
> > 
> > Cc: Zhenyu Wang <zhenyuw at linux.intel.com>
> > Signed-off-by: Chuanxiao Dong <chuanxiao.dong at intel.com>

<SNIP>

> > @@ -84,6 +84,11 @@ int intel_gvt_init(struct drm_i915_private *dev_priv)
> >  		goto bail;
> >  	}
> >  
> > +	if (i915.enable_guc_submission) {
> > +		DRM_INFO("GPU guest virtualisation [GVT-g] disabled due to enabled GuC submission [i915.enable_guc_submission module parameter]\n");

Guest module parameter is not the correct way of detetecting if host
has GuC submission enabled. And even if it was, the message is overly
verbose (and it'll be incorrect once i915.enable_guc_submission
defaults to something else than zero).

> > +		goto bail;
> > +	}
> > +
> >  	/*
> >  	 * We're not in host or fail to find a MPT module, disable GVT-g
> >  	 */
> > -- 
> 
> Applied, thanks!

The original patch should've included at least some Cc's, or wait being
merged through drm-tip as it's not int drm/i915/gvt directory at all
(unlike the message states).

The patch should be reverted for being incorrect.

Regards, Joonas
-- 
Joonas Lahtinen
Open Source Technology Center
Intel Corporation