lkml.org 
[lkml]   [2015]   [Jul]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/2] x86/microcode/amd: Do not overwrite specific patch levels
Date
From: Borislav Petkov <bp@suse.de>

Certain patch levels supplied by the BIOS should not be upgraded and
overwritten by the microcode loader because doing so leaves the system
dead in the water.

The two below provide for filtering out those levels and avoiding the
update, thereby making those patch levels final.

Borislav Petkov (2):
x86/microcode/amd: Extract current patch level read to a function
x86/microcode/amd: Do not overwrite final patch levels

arch/x86/include/asm/microcode_amd.h | 1 +
arch/x86/kernel/cpu/microcode/amd.c | 52 +++++++++++++++++++++++++++++--
arch/x86/kernel/cpu/microcode/amd_early.c | 24 ++++++++------
3 files changed, 65 insertions(+), 12 deletions(-)

--
2.3.5



\
 
 \ /
  Last update: 2015-07-01 22:21    [W:0.145 / U:0.936 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site