Commit fe638401 authored Feb 29, 2016 by Will Deacon

arm64: perf: Extend ARMV8_EVTYPE_MASK to include PMCR.LC

Commit 7175f059 ("arm64: perf: Enable PMCR long cycle counter bit")
added initial support for a 64-bit cycle counter enabled using PMCR.LC.

Unfortunately, that patch doesn't extend ARMV8_EVTYPE_MASK, so any
attempts to set the enable bit are ignored by armv8pmu_pmcr_write.

This patch extends the mask to include the new bit.

Signed-off-by: Will Deacon <will.deacon@arm.com>

parent 3b23d77b

arch/arm64/kernel/perf_event.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -408,7 +408,7 @@ static const struct attribute_group *armv8_pmuv3_attr_groups[] = {
		#define ARMV8_PMCR_LC (1 << 6) /* Overflow on 64 bit cycle counter */
		#define ARMV8_PMCR_N_SHIFT 11 /* Number of counters supported */
		#define ARMV8_PMCR_N_MASK 0x1f
		#define ARMV8_PMCR_MASK 0x3f /* Mask for writable bits */
		#define ARMV8_PMCR_MASK 0x7f /* Mask for writable bits */

		/*
		* PMOVSR: counters overflow flag status reg