]> git.karo-electronics.de Git - linux-beck.git/commit
x86/CPU/AMD: Fix Zen SMT topology
authorYazen Ghannam <Yazen.Ghannam@amd.com>
Sun, 5 Feb 2017 10:50:22 +0000 (11:50 +0100)
committerIngo Molnar <mingo@kernel.org>
Sun, 5 Feb 2017 11:18:45 +0000 (12:18 +0100)
commit08b259631b5a1d912af4832847b5642f377d9101
tree3a77b453bac2a4e76f4e12d1c40d4c07f3f3258d
parent79a8b9aa388b0620cc1d525d7c0f0d9a8a85e08e
x86/CPU/AMD: Fix Zen SMT topology

After:

  a33d331761bc ("x86/CPU/AMD: Fix Bulldozer topology")

our  SMT scheduling topology for Fam17h systems is broken, because
the ThreadId is included in the ApicId when SMT is enabled.

So, without further decoding cpu_core_id is unique for each thread
rather than the same for threads on the same core. This didn't affect
systems with SMT disabled. Make cpu_core_id be what it is defined to be.

Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org> # 4.9
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170205105022.8705-2-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/kernel/cpu/amd.c