Re: [patch 0/4] x86: AMD microcode patch loading v2 fixes

[H. Peter Anvin]

Dmitry Adamushko wrote:
> Tigran, Peter,
>
> may a firmware package contain a few 'microcode' updates for a specific cpu?
>
> And if so, does each of them provide independent 'errata' fixes? [*]
>
> (or they are just different versions of the same self-consistent/full
> 'microcode' update and we may need to apply each of them just e.g.
> because we can't jump from stepping X.1 to X.3 without applying X.2 in
> between?
>
> if it's [1], then I wonder why only a single 'microcode' update (which
> has been previously cached in 'uci->mc') is being applied for the case
> of system-wide resume (apply_microcode_check_cpu()). Don't we need to
> go through the full cpu_request_microcode() cycle to consider all
> updates?

No, there is only ever one microcode; you only run the latest one.

	-hpa
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