Re: [PATCH 2/6] x86/msr-index: Define MSR index and bit for the microcode staging feature

[Borislav Petkov]

On Tue, Dec 10, 2024 at 05:42:08PM -0800, Chang S. Bae wrote:
> The microcode staging feature involves two key MSR entities, the
> presence of which is indicated by bit 16 of IA32_ARCH_CAPABILITIES:
> 
> * Bit 4 in IA32_MCU_ENUMERATION shows the availability of the microcode
>   staging feature.
> 
> * Staging is managed through MMIO registers, with
>   IA32_MCU_STAGING_MBOX_ADDR MSR specifying the physical address of the
>   first MMIO register.
> 
> Define the MSR index and bit assignments, helping the upcoming staging
> code to make use of the hardware feature.
> 
> Signed-off-by: Chang S. Bae <chang.seok.bae@xxxxxxxxx>
> ---
>  arch/x86/include/asm/msr-index.h | 9 +++++++++
>  1 file changed, 9 insertions(+)

Merge this patch with the patch where those MSR bits are used - no need for
a separate one.

-- 
Regards/Gruss,
    Boris.

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