p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

arm64: perf: Extend ARMV8_EVTYPE_MASK to include PMCR.LC 

Commit 7175f0591e ("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>
This commit is contained in:
Will Deacon 2016-02-29 23:15:44 +00:00
parent 3b23d77b42
commit fe638401a0
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm64/kernel/perf_event.c
View File

@ -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