lkml.org 
[lkml]   [2015]   [Oct]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2] x86/mm: warn on W+x mappings
On Mon, 12 Oct, at 02:49:36PM, Ingo Molnar wrote:
>
>
> So why not unmap them after bootup? Is there any reason to call into EFI code
> while the system is up and running?

That's where the runtime services code lives. So if you want things
like EFI variables (used by the distro installer, among other things)
you need to map the runtime regions.

You can of course disable that by using the "noefi" kernel parameter,
which should unmap everything for you once you've finished booting.

--
Matt Fleming, Intel Open Source Technology Center


\
 
 \ /
  Last update: 2015-10-12 15:21    [W:0.152 / U:0.052 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site