lkml.org 
[lkml]   [2015]   [Apr]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] x86/asm/entry/64: better check for canonical address
On Tue, Apr 21, 2015 at 9:27 AM, Denys Vlasenko <dvlasenk@redhat.com> wrote:
> This change makes the check exact (no more false positives
> on "negative" addresses).

Acked-by: Andy Lutomirski <luto@kernel.org>

I'll take a full implementation of what Intel says over probably
unmeasurable performance. If anyone in the AMD camp really cared, we
could add X86_BUG_SYSRET_NEEDS_CANONICAL_RCX and use alternatives to
patch this out on AMD. I doubt this would buy us much.

--Andy


\
 
 \ /
  Last update: 2015-04-21 20:41    [W:0.074 / U:2.212 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site