Messages in this thread | | | Date | Tue, 15 Mar 2016 01:29:21 +0100 | From | "Luis R. Rodriguez" <> | Subject | Re: [PATCH 1/2] x86/mm/pat: Change pat_disable() to emulate PAT table |
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I like this approach more as it stuff more PAT setup on its own type of calls, but:
On Sat, Mar 12, 2016 at 12:55:44PM +0100, Borislav Petkov wrote: > diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c > index 10f8d4796240..5c442b4bd52a 100644 > --- a/arch/x86/kernel/cpu/mtrr/main.c > +++ b/arch/x86/kernel/cpu/mtrr/main.c > @@ -759,8 +761,11 @@ void __init mtrr_bp_init(void) > } > } > > - if (!mtrr_enabled()) > + if (!__mtrr_enabled) { > pr_info("MTRR: Disabled\n"); > + pat_disable("PAT disabled by MTRR"); > + pat_setup(); > + } > }
This hunk would break PAT on Xen.
Luis
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