From: Borislav Petkov <bp@alien8.de>
To: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Andy Lutomirski <luto@amacapital.net>,
Ingo Molnar <mingo@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Stephen Smalley <sds@tycho.nsa.gov>,
Dave Jones <davej@codemonkey.org.uk>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Andrew Morton <akpm@linux-foundation.org>,
Andy Lutomirski <luto@kernel.org>,
Denys Vlasenko <dvlasenk@redhat.com>,
Kees Cook <keescook@chromium.org>,
linux-efi@vger.kernel.org
Subject: Re: [GIT PULL] x86/mm changes for v4.4
Date: Fri, 6 Nov 2015 14:24:47 +0100 [thread overview]
Message-ID: <20151106132447.GB19522@pd.tnic> (raw)
In-Reply-To: <20151106130948.GD2651@codeblueprint.co.uk>
On Fri, Nov 06, 2015 at 01:09:48PM +0000, Matt Fleming wrote:
> On Thu, 05 Nov, at 11:05:35PM, Andy Lutomirski wrote:
> >
> > Admittedly, we might need to use a certain amount of care to avoid
> > interesting conflicts with the vmap mechanism. We might need to vmap
> > all of the EFI stuff, and possibly even all the top-level entries that
> > contain EFI stuff (i.e. exactly one of them unless EFI ends up *huge*)
> > as a blank not-present region to avoid overlaps, but that's not a big
> > deal.
>
> There shouldn't be any room for conflicting with vmap() because the VA
> region where we map EFI regions is still carved out especially for us.
>
> Right Boris?
Yap:
ffffea0000000000 - ffffeaffffffffff (=40 bits) virtual memory map (1TB)
vs
ffffffef00000000 - ffffffff00000000 EFI region in trampoline_pgd
the new pagetable will make that issue moot too.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
next prev parent reply other threads:[~2015-11-06 13:24 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-03 11:16 Ingo Molnar
2015-11-04 19:26 ` Linus Torvalds
2015-11-04 23:39 ` Dave Jones
2015-11-05 1:31 ` Linus Torvalds
2015-11-05 2:17 ` Dave Jones
2015-11-05 21:27 ` Linus Torvalds
2015-11-05 21:33 ` Linus Torvalds
2015-11-06 11:39 ` Matt Fleming
2015-11-07 7:05 ` Ingo Molnar
2015-11-07 10:03 ` Matt Fleming
2015-11-05 22:04 ` Linus Torvalds
2015-11-05 22:27 ` Borislav Petkov
2015-11-06 6:55 ` Ingo Molnar
2015-11-06 7:05 ` Andy Lutomirski
2015-11-06 13:09 ` Matt Fleming
2015-11-06 13:24 ` Borislav Petkov [this message]
2015-11-07 7:03 ` Ingo Molnar
2015-11-06 7:44 ` Ingo Molnar
2015-11-06 12:39 ` Matt Fleming
2015-11-07 7:09 ` Ingo Molnar
2015-11-07 7:39 ` Ard Biesheuvel
2015-11-08 6:58 ` Kees Cook
2015-11-08 7:55 ` Ard Biesheuvel
2015-11-09 21:08 ` Kees Cook
2015-11-10 7:08 ` Ard Biesheuvel
2015-11-10 20:11 ` Kees Cook
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