linux/arch/x86/events
Oskar Senft 15a3e845b0 perf/x86/intel/uncore: Fix SBOX support for Broadwell CPUs
SBOX on some Broadwell CPUs is broken because it's enabled unconditionally
despite the fact that there are no SBOXes available.

Check the Power Control Unit CAPID4 register to determine the number of
available SBOXes on the particular CPU before trying to enable them. If
there are none, nullify the SBOX descriptor so it isn't tried to be
initialized.

Signed-off-by: Oskar Senft <osk@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Mark van Dijk <mark@voidzero.net>
Reviewed-by: Kan Liang <kan.liang@intel.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: ak@linux.intel.com
Cc: peterz@infradead.org
Cc: eranian@google.com
Link: https://lkml.kernel.org/r/1521810690-2576-2-git-send-email-kan.liang@linux.intel.com
2018-04-20 13:17:50 +02:00
..
amd perf/x86/amd/power: Do not load AMD power module on !AMD platforms 2018-01-24 13:00:35 +01:00
intel perf/x86/intel/uncore: Fix SBOX support for Broadwell CPUs 2018-04-20 13:17:50 +02:00
core.c perf/x86: Update rdpmc_always_available static key to the modern API 2018-03-27 07:53:00 +02:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile perf/x86/events: Add an AMD-specific Makefile 2017-01-30 12:01:19 +01:00
msr.c x86/tsc: Get rid of rdtscll() 2018-03-23 20:07:54 +01:00
perf_event.h Merge branch 'perf/urgent' into perf/core, to pick up fixes 2018-03-24 09:21:47 +01:00