From: Borislav Petkov <bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org>
To: Matt Fleming <matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
Cc: Andy Lutomirski <luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>,
Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Stephen Smalley <sds-+05T5uksL2qpZYMLLGbcSA@public.gmane.org>,
Dave Jones
<davej-rdkfGonbjUTCLXcRTR1eJlpr/1R2p/CL@public.gmane.org>,
Linux Kernel Mailing List
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
"H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Andy Lutomirski <luto-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Denys Vlasenko <dvlasenk-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Kees Cook <keescook-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.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-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
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.
prev parent reply other threads:[~2015-11-06 13:24 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20151103111649.GA3477@gmail.com>
[not found] ` <CA+55aFzcwO+RSLeHOwAYvjZ5AcVvD9Th2=G3R=ZQY1xf+MkDow@mail.gmail.com>
[not found] ` <20151104233907.GA25925@codemonkey.org.uk>
[not found] ` <CA+55aFxb14eM6b=ctq65Dx-Ujehj2dbtsVM9rrVOVfLgT=EoHg@mail.gmail.com>
[not found] ` <20151105021710.GA22941@codemonkey.org.uk>
[not found] ` <CA+55aFyXNFu_TfmBjGedCRujoAbhqiBcia7XOtzSq0uxbVv6MA@mail.gmail.com>
[not found] ` <CA+55aFyC7L85SYen3Uz6e1cvH0jXzQ9_MddHJ=7PxvpOR2U23w@mail.gmail.com>
2015-11-06 11:39 ` [GIT PULL] x86/mm changes for v4.4 Matt Fleming
[not found] ` <20151106113943.GB2651-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2015-11-07 7:05 ` Ingo Molnar
[not found] ` <20151107070554.GB6235-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-11-07 10:03 ` Matt Fleming
[not found] ` <20151106065549.GA2031@gmail.com>
2015-11-06 12:39 ` Matt Fleming
[not found] ` <20151106123912.GC2651-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
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
[not found] ` <CAKv+Gu9ct9Rwi+_-0KtLq3Gw2Rn+QLhSVt_zbn4zBxfk_Qs16g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-11-10 20:11 ` Kees Cook
[not found] ` <CALCETrU2dn4TEj_2QiCPy4Mjw6hCbB84k1RnPzx7sLNygj4D5Q@mail.gmail.com>
[not found] ` <CALCETrU2dn4TEj_2QiCPy4Mjw6hCbB84k1RnPzx7sLNygj4D5Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-11-06 13:09 ` Matt Fleming
[not found] ` <20151106130948.GD2651-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2015-11-06 13:24 ` Borislav Petkov [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20151106132447.GB19522@pd.tnic \
--to=bp-gina5biwoiwzqb+pc5nmwq@public.gmane.org \
--cc=akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org \
--cc=davej-rdkfGonbjUTCLXcRTR1eJlpr/1R2p/CL@public.gmane.org \
--cc=dvlasenk-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org \
--cc=hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org \
--cc=keescook-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org \
--cc=linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=luto-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
--cc=luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org \
--cc=matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org \
--cc=mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
--cc=sds-+05T5uksL2qpZYMLLGbcSA@public.gmane.org \
--cc=tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org \
--cc=torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox