perf/core, arch/arm: Use PERF_PMU_CAP_NO_EXCLUDE for exclusion incapable PMUs

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>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: robin.murphy@arm.com
Cc: suzuki.poulose@arm.com
Link: https://lkml.kernel.org/r/1547128414-50693-7-git-send-email-andrew.murray@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/arm/mach-imx/mmdc.c b/arch/arm/mach-imx/mmdc.c
index e49e068..fce4b42 100644 (file)
--- a/arch/arm/mach-imx/mmdc.c
+++ b/arch/arm/mach-imx/mmdc.c
@@ -294,13 +294,7 @@ 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)
@@ -456,6 +450,7 @@ 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 (file)
--- 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();