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arm64: perf: Add support for Armv8.1 PMCEID register format

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Armv8.1 allocated the upper 32-bits of the PMCEID registers to describe
the common architectural and microarchitecture events beginning at 0x4000.

Add support for these registers to our probing code, so that we can
advertise the SPE events when they are supported by the CPU.

Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Will Deacon
2018-10-05 13:28:07 +01:00
parent d3adeed728
commit 342e53bd85
2 changed files with 21 additions and 8 deletions
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4
include/linux/perf/arm_pmu.h
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@@ -102,8 +102,10 @@ struct arm_pmu {
int (*filter_match)(struct perf_event *event);
int num_events;
bool secure_access; /* 32-bit ARM only */
#define ARMV8_PMUV3_MAX_COMMON_EVENTS 0x40
#define ARMV8_PMUV3_MAX_COMMON_EVENTS 0x40
DECLARE_BITMAP(pmceid_bitmap, ARMV8_PMUV3_MAX_COMMON_EVENTS);
#define ARMV8_PMUV3_EXT_COMMON_EVENT_BASE 0x4000
DECLARE_BITMAP(pmceid_ext_bitmap, ARMV8_PMUV3_MAX_COMMON_EVENTS);
struct platform_device *plat_device;
struct pmu_hw_events __percpu *hw_events;
struct hlist_node node;