diff options
| author | Andrew Murray <andrew.murray@arm.com> | 2019-01-10 13:53:30 +0000 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-01-21 11:01:25 +0100 |
| commit | a66b0010f89e50ca0dd8bb3dc5187cd21e1da891 (patch) | |
| tree | 6e7af291b8f009d2d440c4f9314eea101f2cf6cb /drivers/perf/xgene_pmu.c | |
| parent | 306563985819ed2af9df0a26ae368ed12cf28f41 (diff) | |
| download | linux-a66b0010f89e50ca0dd8bb3dc5187cd21e1da891.tar.bz2 | |
perf/drivers: Strengthen exclusion checks with PERF_PMU_CAP_NO_EXCLUDE
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.
This change means that qcom_{l2|l3}_pmu will now also indicate that
they do not support exclude_{host|guest} and that xgene_pmu does
not also support exclude_idle and exclude_hv.
Note that for qcom_l2_pmu we now implictly return -EINVAL instead
of -EOPNOTSUPP. This change will result in the perf userspace
utility retrying the perf_event_open system call with fallback
event attributes that do not fail.
Signed-off-by: Andrew Murray <andrew.murray@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.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: Shawn Guo <shawnguo@kernel.org>
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/1547128414-50693-9-git-send-email-andrew.murray@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/perf/xgene_pmu.c')
| -rw-r--r-- | drivers/perf/xgene_pmu.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/drivers/perf/xgene_pmu.c b/drivers/perf/xgene_pmu.c index 0dc9ff0f8894..d4ec04868d59 100644 --- a/drivers/perf/xgene_pmu.c +++ b/drivers/perf/xgene_pmu.c @@ -917,11 +917,6 @@ static int xgene_perf_event_init(struct perf_event *event) if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK) return -EINVAL; - /* SOC counters do not have usr/os/guest/host bits */ - if (event->attr.exclude_user || event->attr.exclude_kernel || - event->attr.exclude_host || event->attr.exclude_guest) - return -EINVAL; - if (event->cpu < 0) return -EINVAL; /* @@ -1136,6 +1131,7 @@ static int xgene_init_perf(struct xgene_pmu_dev *pmu_dev, char *name) .start = xgene_perf_start, .stop = xgene_perf_stop, .read = xgene_perf_read, + .capabilities = PERF_PMU_CAP_NO_EXCLUDE, }; /* Hardware counter init */ |