x86/cpu/AMD: Fix erratum 1076 (CPB bit)

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CPUID Fn8000_0007_EDX[CPB] is wrongly 0 on models up to B1. But they do
support CPB (AMD's Core Performance Boosting cpufreq CPU feature), so fix that.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sherry Hurwitz <sherry.hurwitz@amd.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170907170821.16021-1-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Borislav Petkov 2017-09-07 19:08:21 +02:00 • committed by Ingo Molnar

parent 711aab1dbb

commit f7f3dc00f6

1 changed files with 11 additions and 0 deletions

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arch/x86/kernel/cpu/amd.c

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