RE: [PATCH 5/6] x86/mm: only check uniform after calling mtrr_type_lookup()

[Kani, Toshi]

On 07.02.23 12:42, Borislav Petkov wrote:
> On Tue, Feb 07, 2023 at 08:29:01AM +0100, Juergen Gross wrote:
> > Today pud_set_huge() and pmd_set_huge() test for the MTRR type to be
> > WB or INVALID after calling mtrr_type_lookup(). Those tests can be
> > dropped, as the only reason to not use a large mapping would be
> > uniform being 0. Any MTRR type can be accepted as long as it applies
> > to the whole memory range covered by the mapping, as the alternative
> > would only be to map the same region with smaller pages instead using
> > the same PAT type as for the large mapping.
:
> Lemme add Toshi who authored that code - he might have a comment or
> two.

The current mtrr_type_look() does not set 'uniform' for MTRR_TYPE_INVALID.
Please also update it to set 'uniform', if not done in other patches.

Toshi