Bug#1043437: linux: report microcode upgrade *from* version as well

[Salvatore Bonaccorso <carnil@debian.org>]

Source: linux
Source-Version: 6.3.1-1~exp1

Hi Thorsten,

On Fri, Aug 11, 2023 at 07:23:57AM +0200, Thorsten Glaser wrote:
> Package: src:linux
> Version: 5.10.179-3
> Severity: wishlist
> Tags: upstream
> X-Debbugs-Cc: tg@mirbsd.de
> 
> I have this in dmesg:
> 
> [    0.000000] microcode: microcode updated early to revision 0xa4, date = 2010-10-02
> 
> It would be very nice if this message also showed the revision *from*
> which it was upgraded, so that info is available without going through
> extra hoops to boot without µcode upgrade.

This is fixed upstream in a9a5cac225b0 ("x86/microcode/intel: Print
old and new revision during early boot") in 6.3-rc1, but not sure it
will have changes to get backported to stable series upstream.

Would you mind trying to get that applied in the needed stable series?

Regards,
Salvatore