Re: [tip:efi/core] x86/mm/pat: Use _PAGE_GLOBAL bit for EFI page table mappings

From: Borislav Petkov
Date: Wed Feb 24 2016 - 11:41:48 EST

On Wed, Feb 24, 2016 at 05:20:02PM +0100, Borislav Petkov wrote:
> That's mixed mode. I think you mean the FLUSH_TLB_ALL in efi_call.
> That's EFI on 64-bit but that is mandated by the spec, AFAIR.

Ok, so mfleming set me straight on IRC - that's tip/master I should be
staring at.

In any case, I think we should do __flush_tlb_all() in efi_call_cirt()
just in case, for the simple reason that EFI could be installing some
funky TLB entries which we don't want. I'm not saying it does and it
probably won't but what's stopping it?

Or am I being overly paranoid?


ECO tip #101: Trim your mails when you reply.