lkml.org 
[lkml]   [2018]   [Jan]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 5/7] x86: Use IBRS for firmware update path
On Thu,  4 Jan 2018 09:56:46 -0800
Tim Chen <tim.c.chen@linux.intel.com> wrote:

> From: David Woodhouse <dwmw@amazon.co.uk>
>
> We are impervious to the indirect branch prediction attack with retpoline
> but firmware won't be, so we still need to set IBRS to protect
> firmware code execution when calling into firmware at runtime.

If you are going to care about APM then you also need to care about
BIOS32 interfaces (arch/x86/pc/pcibios.c) and PNPBIOS
(drivers/pnp/pnpbios/bioscalls.c)

Alan

\
 
 \ /
  Last update: 2018-01-04 19:50    [W:0.191 / U:10.784 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site