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Bug#1043355: linux: Select MICROCODE_LATE_LOADING

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  Bug#1043355: linux: Select MICROCODE_LATE_LOADING Paul Menzel <pmenzel@molgen.mpg.de> - 2023-08-09 14:30 +0200
    Bug#1043355: marked as done (linux: Select MICROCODE_LATE_LOADING) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-05-01 17:50 +0200

#79966 — Bug#1043355: linux: Select MICROCODE_LATE_LOADING

Package: src:linux
Version: 6.5~rc4-1~exp1
Severity: Normal


Dear Debian folks,


Currently, Debian’s Linux kernel does not allow late loading microcode 
updates. Although discouraged, there are environments where that is 
preferred to rebooting/kexec’ing the system. It’d be great, if you could 
enable this.

The option was introduced in Linux 5.19, and backported to Linux 
5.15.99. Before the feature was working, but as the config defaults to 
no, it no longer does.

     $ grep LATE_L /boot/config-6.*
     /boot/config-6.4.0-1-amd64:# CONFIG_MICROCODE_LATE_LOADING is not set
     /boot/config-6.5.0-0-amd64:# CONFIG_MICROCODE_LATE_LOADING is not set

The reason is, that the commit adding the new option 
`CONFIG_MICROCODE_LATE_LOADING`, introduced in Linux with commit 
a77a94f86273 (x86/microcode: Default-disable late loading) [1] was 
backported to stable release v5.15.99 in commit 6d2b3a31 [2], and the 
Linux configuration was not updated.


Kind regards,

Paul


[1]: 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a77a94f86273ce42a39cb479217dd8d68acfe0ff
[2]: 
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=6d2b3a319144f3f5148d8a2b19549ea3bb118c2e

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#87256 — Bug#1043355: marked as done (linux: Select MICROCODE_LATE_LOADING)

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Your message dated Thu, 01 May 2025 17:40:14 +0200 (CEST)
with message-id <20250501154014.60280BE2DE0@eldamar.lan>
and subject line Closing this bug (BTS maintenance for src:linux bugs)
has caused the Debian Bug report #1043355,
regarding linux: Select MICROCODE_LATE_LOADING
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
1043355: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1043355
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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