linux_dsm_epyc7002/arch/powerpc/perf
Anton Blanchard f56029410a powerpc/perf: Never program book3s PMCs with values >= 0x80000000
We are seeing a lot of PMU warnings on POWER8:

    Can't find PMC that caused IRQ

Looking closer, the active PMC is 0 at this point and we took a PMU
exception on the transition from negative to 0. Some versions of POWER8
have an issue where they edge detect and not level detect PMC overflows.

A number of places program the PMC with (0x80000000 - period_left),
where period_left can be negative. We can either fix all of these or
just ensure that period_left is always >= 1.

This patch takes the second option.

Cc: <stable@vger.kernel.org>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-11 13:50:47 +10:00
..
bhrb.S powerpc/perf: Add basic assembly code to read BHRB entries on POWER8 2013-04-26 16:11:11 +10:00
callchain.c powerpc/perf: Use perf_instruction_pointer in callchains 2012-07-10 19:18:46 +10:00
core-book3s.c powerpc/perf: Never program book3s PMCs with values >= 0x80000000 2014-07-11 13:50:47 +10:00
core-fsl-emb.c powerpc/perf: add 2 additional performance monitor counters for e6500 core 2013-08-07 18:38:03 -05:00
e500-pmu.c powerpc/perf: Add stalled-cycles events 2013-01-10 17:00:56 +11:00
e6500-pmu.c powerpc/perf: Add e6500 PMU driver 2013-08-07 18:38:04 -05:00
hv-24x7-catalog.h powerpc/perf: Add 24x7 interface headers 2014-03-24 09:48:29 +11:00
hv-24x7.c powerpc/perf/hv-24x7: Catalog version number is be64, not be32 2014-04-28 16:31:50 +10:00
hv-24x7.h powerpc/perf: Add 24x7 interface headers 2014-03-24 09:48:29 +11:00
hv-common.c powerpc/perf: Add a shared interface to get gpci version and capabilities 2014-03-24 09:48:30 +11:00
hv-common.h powerpc/perf: Add macros for defining event fields & formats 2014-03-24 09:48:31 +11:00
hv-gpci.c powerpc/perf/hv-gpci: Make device attr static 2014-04-28 13:11:26 +10:00
hv-gpci.h powerpc/perf: Add hv_gpci interface header 2014-03-24 09:48:29 +11:00
Makefile powerpc/perf: Add kconfig option for hypervisor provided counters 2014-03-24 09:48:32 +11:00
mpc7450-pmu.c
power4-pmu.c
power5-pmu.c powerpc/perf: Add an explict flag indicating presence of SLOT field 2013-04-26 16:11:07 +10:00
power5+-pmu.c powerpc/perf: Add an explict flag indicating presence of SLOT field 2013-04-26 16:11:07 +10:00
power6-pmu.c
power7-events-list.h powerpc/perf: Make some new raw event codes available in sysfs 2014-03-24 09:48:23 +11:00
power7-pmu.c perf tools: Make Power7 events available for perf 2013-07-12 13:46:09 -03:00
power8-pmu.c powerpc/perf: Add PPMU_ARCH_207S define 2014-07-11 12:55:07 +10:00
ppc970-pmu.c