[v3,06/12] arm: perf/core: use PERF_PMU_CAP_NO_EXCLUDE for exclude incapable PMUs

Message ID 1544114849-47266-7-git-send-email-andrew.murray@arm.com
State New
Headers show
Series
  • perf/core: Generalise event exclusion checking
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Commit Message

Andrew Murray Dec. 6, 2018, 4:47 p.m.
For drivers that do not support context exclusion let's advertise the
PERF_PMU_CAP_NO_EXCLUDE capability. This ensures that perf will
prevent us from handling events where any exclusion flags are set.
Let's also remove the now unnecessary check for exclusion flags.

Signed-off-by: Andrew Murray <andrew.murray@arm.com>
---
 arch/arm/mach-imx/mmdc.c     | 9 ++-------
 arch/arm/mm/cache-l2x0-pmu.c | 9 +--------
 2 files changed, 3 insertions(+), 15 deletions(-)

Comments

Shawn Guo Dec. 9, 2018, 12:43 p.m. | #1
On Thu, Dec 06, 2018 at 04:47:23PM +0000, Andrew Murray wrote:
> For drivers that do not support context exclusion let's advertise the
> PERF_PMU_CAP_NO_EXCLUDE capability. This ensures that perf will
> prevent us from handling events where any exclusion flags are set.
> Let's also remove the now unnecessary check for exclusion flags.
> 
> Signed-off-by: Andrew Murray <andrew.murray@arm.com>
> ---
>  arch/arm/mach-imx/mmdc.c     | 9 ++-------

For imx mmdc changes:

Acked-by: Shawn Guo <shawnguo@kernel.org>

Patch

diff --git a/arch/arm/mach-imx/mmdc.c b/arch/arm/mach-imx/mmdc.c
index 04b3bf7..3453838 100644
--- a/arch/arm/mach-imx/mmdc.c
+++ b/arch/arm/mach-imx/mmdc.c
@@ -293,13 +293,7 @@  static int mmdc_pmu_event_init(struct perf_event *event)
 		return -EOPNOTSUPP;
 	}
 
-	if (event->attr.exclude_user		||
-			event->attr.exclude_kernel	||
-			event->attr.exclude_hv		||
-			event->attr.exclude_idle	||
-			event->attr.exclude_host	||
-			event->attr.exclude_guest	||
-			event->attr.sample_period)
+	if (event->attr.sample_period)
 		return -EINVAL;
 
 	if (cfg < 0 || cfg >= MMDC_NUM_COUNTERS)
@@ -455,6 +449,7 @@  static int mmdc_pmu_init(struct mmdc_pmu *pmu_mmdc,
 			.start          = mmdc_pmu_event_start,
 			.stop           = mmdc_pmu_event_stop,
 			.read           = mmdc_pmu_event_update,
+			.capabilities	= PERF_PMU_CAP_NO_EXCLUDE,
 		},
 		.mmdc_base = mmdc_base,
 		.dev = dev,
diff --git a/arch/arm/mm/cache-l2x0-pmu.c b/arch/arm/mm/cache-l2x0-pmu.c
index afe5b4c..99bcd07 100644
--- a/arch/arm/mm/cache-l2x0-pmu.c
+++ b/arch/arm/mm/cache-l2x0-pmu.c
@@ -314,14 +314,6 @@  static int l2x0_pmu_event_init(struct perf_event *event)
 	    event->attach_state & PERF_ATTACH_TASK)
 		return -EINVAL;
 
-	if (event->attr.exclude_user   ||
-	    event->attr.exclude_kernel ||
-	    event->attr.exclude_hv     ||
-	    event->attr.exclude_idle   ||
-	    event->attr.exclude_host   ||
-	    event->attr.exclude_guest)
-		return -EINVAL;
-
 	if (event->cpu < 0)
 		return -EINVAL;
 
@@ -544,6 +536,7 @@  static __init int l2x0_pmu_init(void)
 		.del = l2x0_pmu_event_del,
 		.event_init = l2x0_pmu_event_init,
 		.attr_groups = l2x0_pmu_attr_groups,
+		.capabilities = PERF_PMU_CAP_NO_EXCLUDE,
 	};
 
 	l2x0_pmu_reset();