x86, microcode, AMD: Check before applying a patch

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Make sure we're actually applying a microcode patch to a core which
really needs it.

This brings only a very very very minor slowdown on F10:

0.032218828 sec vs 0.056010626 sec with this patch.

And small speedup on F15:

0.487089449 sec vs 0.180551162 sec (from perf output).

Also, fixup comments while at it.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Link: http://lkml.kernel.org/r/1344361461-10076-8-git-send-email-bp@amd64.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

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Borislav Petkov 2012-06-20 16:17:51 +02:00 • committed by H. Peter Anvin

parent e7e632f5ba

commit 685ca6d797

1 changed files with 10 additions and 3 deletions

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arch/x86/kernel/microcode_amd.c

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