Re: early microcode: how to disable at runtime?

From: H. Peter Anvin
Date: Mon Sep 01 2014 - 14:48:59 EST

No, it is worse to rename it and have older kernels behave differently. Kernel options are basically super obscure to most people anyway.

On September 1, 2014 10:43:22 AM PDT, Henrique de Moraes Holschuh <hmh@xxxxxxxxxx> wrote:
>On Mon, 01 Sep 2014, H. Peter Anvin wrote:
>> On 08/31/2014 10:13 PM, Borislav Petkov wrote:
>> > On Sun, Aug 31, 2014 at 05:11:26PM -0300, Henrique de Moraes
>Holschuh wrote:
>> >>> Probably more like something more like arch/x86/boot/cmdline.c.
>> >>> we could even make it sharable.
>> >>
>> >> Looks like that would work, yes.
>> >
>> > Guys, guys, please relax and check the code first: "dis_ucode_ldr".
>> >
>> Yeah. It is an absolutely horrific option name (something like
>> "noearlyucode" would have been so much nicer; we generally use the
>> prefix and no underscores) but I should have objected to that one
>> sooner.
>It wasn't properly documented, it is obscure as all heck, and early
>microcode updates active by default is a very recent development on
>You cannot even find "dis_ucode_ldr" being cited by anyone through
>I believe it is actually possible to fix this still: either by directly
>renaming, or by using a deprecation period and testing for a new name
>the "dis_ucode_ldr" name.

Sent from my mobile phone. Please pardon brevity and lack of formatting.
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