lkml.org 
[lkml]   [2015]   [Nov]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/6] x86/microcode: Merge early loader
On Mon, Nov 09, 2015 at 10:42:13AM +0100, Harald Hoyer wrote:
> Will this work with kernels not supporting the microcode loading?
> Theoretically the old kernels would just unpack all cpios one after
> the other, right?

Well, what we should be doing is adding two paths to the initrd:

for AMD: kernel/x86/microcode/AuthenticAMD.bin
for Intel: kernel/x86/microcode/GenuineIntel.bin

I.e., the microcode blobs become part of the initrd, see
Documentation/x86/early-microcode.txt. The loader goes and opens the one
it needs at boot time.

You could also add a switch for convenience, something like
--no-microcode or so, so that dracut doesn't add it but if one wants to
not add microcode, one could also move it away from, say, /lib/firmware/
so that dracut simply doesn't find it. The --no-microcode might be more
convenient though.

Kernels which don't support microcode loading would simply not look for
that path.

Let me know if this doesn't make sense and if I need to test/look at
patches.

Thanks.

--
Regards/Gruss,
Boris.

ECO tip #101: Trim your mails when you reply.


\
 
 \ /
  Last update: 2015-11-09 11:21    [W:1.429 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site