x86/microcode: Clarify the late load logic

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reload_store() is way too complicated. Split the inner workings out and
make the following enhancements:

 - Taint the kernel only when the microcode was actually updated. If. e.g.
   the rendezvous fails, then nothing happened and there is no reason for
   tainting.

 - Return useful error codes

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Link: https://lore.kernel.org/r/20231002115903.145048840@linutronix.de

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Thomas Gleixner 2023-10-02 13:59:57 +02:00 • committed by Borislav Petkov (AMD)

parent 634ac23ad6

commit 6f059e634d

1 changed files with 19 additions and 22 deletions

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arch/x86/kernel/cpu/microcode/core.c

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