x86/topology: Fix AMD core count

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It turns out AMD gets x86_max_cores wrong when there are compute
units.

The issue is that Linux assumes:

	nr_logical_cpus = nr_cores * nr_siblings

But AMD reports its CU unit as 2 cores, but then sets num_smp_siblings
to 2 as well.

Boris: fixup ras/mce_amd_inj.c too, to compute the Node Base Core
properly, according to the new nomenclature.

Fixes: 1f12e32f4c ("x86/topology: Create logical package id")
Reported-by: Xiong Zhou <jencce.kernel@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andreas Herrmann <aherrmann@suse.com>
Cc: Andy Lutomirski <luto@kernel.org>
Link: http://lkml.kernel.org/r/20160317095220.GO6344@twins.programming.kicks-ass.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

...

This commit is contained in:

Peter Zijlstra 2016-03-25 15:52:34 +01:00 • committed by Thomas Gleixner

parent f55532a0c0

commit ee6825c80e

3 changed files with 7 additions and 5 deletions

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1

arch/x86/include/asm/smp.h

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8

arch/x86/kernel/cpu/amd.c

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3

arch/x86/ras/mce_amd_inj.c

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