From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753202AbcBWKvw (ORCPT ); Tue, 23 Feb 2016 05:51:52 -0500 Received: from foss.arm.com ([217.140.101.70]:36091 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751490AbcBWKuu (ORCPT ); Tue, 23 Feb 2016 05:50:50 -0500 From: Suzuki K Poulose To: linux-arm-kernel@lists.infradead.org Cc: arm@kernel.org, arnd@arndb.de, olof@lixom.net, punit.agrawal@arm.com, mark.rutland@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, Suzuki K Poulose Subject: [PATCH 10/13] arm-cci: Provide hook for writing to PMU counters Date: Tue, 23 Feb 2016 10:49:52 +0000 Message-Id: <1456224595-3282-11-git-send-email-suzuki.poulose@arm.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1456224595-3282-1-git-send-email-suzuki.poulose@arm.com> References: <1456224595-3282-1-git-send-email-suzuki.poulose@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a hook for writing to CCI PMU counters. This callback can be used for CCI models which requires some extra work to program the PMU counter values. To accommodate group writes and single counter writes, the call back accepts a bitmask of the counter indices which need to be programmed with the given value. Cc: Punit Agrawal Acked-by: Mark Rutland Signed-off-by: Suzuki K Poulose --- drivers/bus/arm-cci.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c index bcc4c59..f1d3f47 100644 --- a/drivers/bus/arm-cci.c +++ b/drivers/bus/arm-cci.c @@ -126,6 +126,7 @@ struct cci_pmu_model { struct event_range event_ranges[CCI_IF_MAX]; int (*validate_hw_event)(struct cci_pmu *, unsigned long); int (*get_event_idx)(struct cci_pmu *, struct cci_pmu_hw_events *, unsigned long); + void (*write_counters)(struct cci_pmu *, unsigned long *); }; static struct cci_pmu_model cci_pmu_models[]; @@ -868,7 +869,7 @@ static void pmu_write_counter(struct cci_pmu *cci_pmu, u32 value, int idx) pmu_write_register(cci_pmu, value, idx, CCI_PMU_CNTR); } -static void pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask) +static void __pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask) { int i; struct cci_pmu_hw_events *cci_hw = &cci_pmu->hw_events; @@ -882,6 +883,14 @@ static void pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask) } } +static void pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask) +{ + if (cci_pmu->model->write_counters) + cci_pmu->model->write_counters(cci_pmu, mask); + else + __pmu_write_counters(cci_pmu, mask); +} + static u64 pmu_event_update(struct perf_event *event) { struct hw_perf_event *hwc = &event->hw; -- 1.7.9.5