linux-kernel - Re: [tip:x86/urgent] x86/efi: Fix boot crash by always mapping boot service regions into new EFI page tables

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Message-ID: <20160313175611.GA24113@gmail.com>
Date:	Sun, 13 Mar 2016 18:56:11 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Matt Fleming <matt@...eblueprint.co.uk>
Cc:	torvalds@...ux-foundation.org, dvlasenk@...hat.com, hpa@...or.com,
	ard.biesheuvel@...aro.org, bp@...en8.de, luto@...capital.net,
	amurzeau@...il.com, ben@...adent.org.uk, mjg59@...f.ucam.org,
	tglx@...utronix.de, hertzog@...ian.org,
	maarten.lankhorst@...onical.com, linux-kernel@...r.kernel.org,
	brgerst@...il.com, rogershimizu@...il.com, peterz@...radead.org,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/urgent] x86/efi: Fix boot crash by always mapping boot
 service regions into new EFI page tables


* Matt Fleming <matt@...eblueprint.co.uk> wrote:

> On Sat, 12 Mar, at 10:57:39AM, tip-bot for Matt Fleming wrote:
> > Commit-ID:  452308de61056a539352a9306c46716d7af8a1f1
> > Gitweb:     http://git.kernel.org/tip/452308de61056a539352a9306c46716d7af8a1f1
> > Author:     Matt Fleming <matt@...eblueprint.co.uk>
> > AuthorDate: Fri, 11 Mar 2016 11:19:23 +0000
> > Committer:  Ingo Molnar <mingo@...nel.org>
> > CommitDate: Sat, 12 Mar 2016 16:57:45 +0100
> > 
> > x86/efi: Fix boot crash by always mapping boot service regions into new EFI page tables
>  
> Ingo, I see you picked this up for x86/urgent, but note that the bug
> isn't actually triggerable until the stuff in tip/efi/core gets
> merged. I'd suggest sticking this patch in tip/efi/core also.

Oh well ... too late for that, it's now upstream.

> It should be harmless to merge this patch before that, but the
> references to separate EFI page tables don't make sense.

Yeah, indeed. It's my bad: we merged the EFI-pagetables code back in
November and I forgot that we skipped its upstream merge twice ...

Thanks,

	Ingo