Re: [patch 02/30] x86/microcode: Hide the config knob

[Ashok Raj]

On Thu, Aug 10, 2023 at 08:37:29PM +0200, Thomas Gleixner wrote:
> In reality CONFIG_MICROCODE is enabled in any reasonable configuration when
> Intel or AMD support is enabled. Accomodate to reality.
> 
> Requested-by: Borislav Petkov <bp@xxxxxxxxx>
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> ---
>  arch/x86/Kconfig                       |   38 ---------------------------------
>  arch/x86/include/asm/microcode.h       |    6 ++---
>  arch/x86/include/asm/microcode_amd.h   |    2 -
>  arch/x86/include/asm/microcode_intel.h |    2 -
>  arch/x86/kernel/cpu/microcode/Makefile |    4 +--
>  5 files changed, 8 insertions(+), 44 deletions(-)
> 
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -1308,44 +1308,8 @@ config X86_REBOOTFIXUPS
>  	  Say N otherwise.
>  
>  config MICROCODE
> -	bool "CPU microcode loading support"
> -	default y
> +	def_bool y
>  	depends on CPU_SUP_AMD || CPU_SUP_INTEL

Seems like there is a dracut dependency that checks for either of these to
be present.

dracut: Generating /boot/initrd.img-6.5.0-rc3-ucode-minrev+
dracut: Disabling early microcode, because kernel does not support it. CONFIG_MICROCODE_[AMD|INTEL]!=y

Just a tool fix.