[Intel-gfx] [PATCH] drm/i915: Disconnect 32 and 48 bit ppGTT support

[Zhi Wang]

Glad to see this happen. :)

After this patch landed, some code pieces in i915 which are specifically 
for disabling dynamic PDP update via LRIs under 32 bit PPGTT could also 
be removed.

For example, gen8_preallocate_top_level_pdp() in i915_gem_gtt.c

Thanks,
Zhi.

On 08/11/17 18:30, Chris Wilson wrote:
> Quoting Joonas Lahtinen (2017-08-11 10:51:26)
>> 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.
> 
> Did the gvt patches land in dinq? After that, I say we just kill the
> module parameter, and so make the choice of GTT mode much easier to follow.
> 
> Have we ever asked a user to debug a problem by changing GTT modes in
> the last 5 years?
> -Chris
>