On Mon, Oct 05, 2015 at 06:02:05PM +0100, Suzuki K. Poulose wrote:
> @@ -137,13 +138,17 @@ extern struct pmu perf_ops_bp;
> /* Determine number of BRP registers available. */
> static inline int get_num_brps(void)
> {
> - return ((read_cpuid(ID_AA64DFR0_EL1) >> 12) & 0xf) + 1;
> + return 1 +
> +
> cpuid_feature_extract_field(read_system_reg(SYS_ID_AA64DFR0_EL1),
> + ID_AA64DFR0_BRPS_SHIFT);
> }
cpuid_feature_extract_field() is fine but we should we bother with
read_system_reg vs just read_cpuid?
Similar question for patch 17/22.
--
Catalin
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