linux-kernel - Re: [PATCH 1/2] x86/efi: Map EFI memmap entries in-order at runtime

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CALCETrUA6k-oHzuWA54VzEA1v63b5--JPCCuBoOxLisOtjUn+g@mail.gmail.com>
Date:	Sun, 27 Sep 2015 09:30:48 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Denys Vlasenko <dvlasenk@...hat.com>,
	Leif Lindholm <leif.lindholm@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Borislav Petkov <bp@...en8.de>,
	stable <stable@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Ingo Molnar <mingo@...nel.org>,
	Brian Gerst <brgerst@...il.com>,
	Dave Young <dyoung@...hat.com>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Jones <pjones@...hat.com>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	Matt Fleming <matt.fleming@...el.com>,
	Borislav Petkov <bp@...e.de>, "Lee, Chun-Yi" <jlee@...e.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	James Bottomley <JBottomley@...n.com>
Subject: Re: [PATCH 1/2] x86/efi: Map EFI memmap entries in-order at runtime

On Sep 26, 2015 1:19 PM, "H. Peter Anvin" <hpa@...or.com> wrote:
>
> Sadly a lot of firmware is known to fail in that configuration :(  That was very much our guest choice.
>

Why can't we map everything completely 1:1 (VA = PA) and call the
setVA thing but pass it literally the identity.

Firmwares that need it to be called will work, and firmwares that fail
to update all offsets will be fine because there's nothing to update.

--Andy
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/