| Message ID | 20220429063307.63251-1-zhangshaokun@hisilicon.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drivers/perf: arm_spe: Expose saturating counter to 16-bit | expand |
On Fri, 29 Apr 2022 14:33:07 +0800, Shaokun Zhang wrote: > In order to acquire more accurate latency, Armv8.8[1] has defined the > CountSize field to 16-bit saturating counters when it's 0b0011. > > Let's support this new feature and expose its to user under sysfs. > > [1] https://developer.arm.com/documentation/ddi0487/latest > > [...] Applied to will (for-next/perf), thanks! [1/1] drivers/perf: arm_spe: Expose saturating counter to 16-bit https://git.kernel.org/will/c/47a9ed88a4fc Cheers,
diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c index d44bcc29d99c..db670b265897 100644 --- a/drivers/perf/arm_spe_pmu.c +++ b/drivers/perf/arm_spe_pmu.c @@ -1035,6 +1035,9 @@ static void __arm_spe_pmu_dev_probe(void *info) fallthrough; case 2: spe_pmu->counter_sz = 12; + break; + case 3: + spe_pmu->counter_sz = 16; } dev_info(dev,
In order to acquire more accurate latency, Armv8.8[1] has defined the CountSize field to 16-bit saturating counters when it's 0b0011. Let's support this new feature and expose its to user under sysfs. [1] https://developer.arm.com/documentation/ddi0487/latest Cc: Will Deacon <will@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com> --- drivers/perf/arm_spe_pmu.c | 3 +++ 1 file changed, 3 insertions(+)