linux-kernel - Re: [PATCH] Map in physical addresses in efi_map_region

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Message-ID: <20160816053810.GA7911@nazgul.tnic>
Date:	Tue, 16 Aug 2016 07:38:10 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Alex Thorlton <athorlton@....com>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	linux-kernel@...r.kernel.org, Russ Anderson <rja@....com>,
	Dimitri Sivanich <sivanich@....com>,
	Mike Travis <travis@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	linux-efi@...r.kernel.org, Dave Young <dyoung@...hat.com>
Subject: Re: [PATCH] Map in physical addresses in efi_map_region_fixed

On Mon, Aug 15, 2016 at 02:52:22PM -0700, H. Peter Anvin wrote:
> So to answer the implicit question: we have found UEFI stacks in the
> field which fail without the physical mappings present, and we have
> found stacks which fail without a nontrivial SetAddressMapping.

You mean SetVirtualAddressMap.

Oh well, it's not like it matters all that much as we have our own
pagetable for EFI so we can go nuts there. Apparently.

-- 
Regards/Gruss,
    Boris.

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