On Wed, Jan 08, 2014 at 10:59:40PM +0000, Stephen Boyd wrote:
> Add basic support for the Krait CPU PMU. This allows us to use
> the architected functionality of the PMU.
>
> This is based on code originally written by Ashwin Chaugule and
> Neil Leeder [1].
>
> [1]
> https://www.codeaurora.org/cgit/quic/la/kernel/msm/tree/arch/arm/kernel/perf_event_msm_krait.c?h=msm-3.4
>
> Cc: Neil Leeder <[email protected]>
> Cc: Ashwin Chaugule <[email protected]>
> Signed-off-by: Stephen Boyd <[email protected]>
> ---
> arch/arm/kernel/perf_event_cpu.c | 1 +
> arch/arm/kernel/perf_event_v7.c | 165
> +++++++++++++++++++++++++++++++++++++++
> 2 files changed, 166 insertions(+)
[...]
> +static int krait_pmu_init(struct arm_pmu *cpu_pmu)
> +{
> + u32 id = read_cpuid_id() & 0xffffff00;
> +
> + armv7pmu_init(cpu_pmu);
> + cpu_pmu->name = "ARMv7 Krait";
> + /* Some early versions of Krait don't support PC write events */
> + if (id == 0x511f0400 || id == 0x510f0600)
> + cpu_pmu->map_event = krait_map_event_no_branch;
Hmm, I'd really rather this information came via the DT. In fact, you could
just drop the branch event from your main map_event_function and keep things
simple. It depends how badly you want to advertise it in perf list :)
Will
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
