On 2017.08.14 20:34:48 +0800, Zhi Wang wrote:
> Looks has_full_48bit_ppgtt is tied to has_full_ppgtt now. Will that be
> disconnected also in future?
>
That's what this is for. So for gvt, we just set has_full_48bit_ppgtt but
not has_full_ppgtt.
> On 08/11/17 17:51, Joonas Lahtinen wrote:
> > Configurations like virtualized environments may support only 48 bit
> > ppGTT without supporting 32 bit ppGTT. Support this by disconnecting
> > the relationship of the two feature bits.
> >
> > Cc: Tina Zhang <tina.zhang@xxxxxxxxx>
> > Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> > Cc: Zhi Wang <zhi.a.wang@xxxxxxxxx>
> > Signed-off-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/i915/i915_gem_gtt.c | 13 +++++++++----
> > 1 file changed, 9 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
> > index 10aa776..a5eada1 100644
> > --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> > +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> > @@ -180,10 +180,15 @@ int intel_sanitize_enable_ppgtt(struct drm_i915_private *dev_priv,
> > return 0;
> > }
> > - if (INTEL_GEN(dev_priv) >= 8 && i915.enable_execlists && has_full_ppgtt)
> > - return has_full_48bit_ppgtt ? 3 : 2;
> > - else
> > - return has_aliasing_ppgtt ? 1 : 0;
> > + if (INTEL_GEN(dev_priv) >= 8 && i915.enable_execlists) {
> > + if (has_full_48bit_ppgtt)
> > + return 3;
> > +
> > + if (has_full_ppgtt)
> > + return 2;
> > + }
> > +
> > + return has_aliasing_ppgtt ? 1 : 0;
> > }
> > static int ppgtt_bind_vma(struct i915_vma *vma,
> >
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