Re: [PATCH 2/2] drm/i915/gtt: Avoid using addresses in non-canonical form.

Chris Wilson
2015-09-15T13:52:30Z

On Tue, Sep 15, 2015 at 03:30:16PM +0200, Michał Winiarski wrote:
> According to bspec, some parts of HW expect the addresses to be in
> a canonical form where bits [63:48] == [47]. Lets satisfy the HW by
> converting the address prior to allocating/clearing the entries in page
> tables.

You should be a little more specific as to why this is only required for
the ppgtt paths.
-Chris

--
Chris Wilson, Intel Open Source Technology Centre