lkml.org 
[lkml]   [2020]   [Feb]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] x86/pkeys: Manually set X86_FEATURE_OSPKE to preserve existing changes
On Wed, Feb 26, 2020 at 04:16:13PM -0800, Jacob Keller wrote:
> I tested this and it resolves my report! Thanks for a timely fix.

Adding your Tested-by.

> I agree with the analysis. Perhaps it would make sense in the long term
> to find a solution where get_cpu_cap can remember what was cleared for
> each CPU and restore those? It already does this using the global
> variables...

get_cpu_cap() remembers if you use setup_force_cpu_cap() but I agree
that that whole feature bit handling is a bit, hm, "strange". It had its
raisins.

FWIW, we had started cleaning those up but then the security nightmares
happened so on the backburner it went...

Thx.

--
Regards/Gruss,
Boris.

https://people.kernel.org/tglx/notes-about-netiquette

\
 
 \ /
  Last update: 2020-02-27 19:02    [W:0.100 / U:0.304 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site