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authorAndrew Murray <andrew.murray@arm.com>2019-01-10 13:53:26 +0000
committerIngo Molnar <mingo@kernel.org>2019-01-21 11:01:21 +0100
commit6dd273f44669de98bfff16371c09065671cbbad6 (patch)
tree5bb73fcf0167d52c8803c34bff0eb93c9dfce30e /drivers/perf
parentcc6795aeffea0a80d0baf9ad31ba926a6c42cef5 (diff)
downloadlinux-6dd273f44669de98bfff16371c09065671cbbad6.tar.bz2
perf/core, arch/alpha: Strengthen exclusion checks with PERF_PMU_CAP_NO_EXCLUDE
As the Alpha PMU doesn't 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 __hw_perf_event_init will now also indicate that it doesn't support exclude_host and exclude_guest and will now implicitly return -EINVAL instead of -EPERM. This is likely more desirable as -EPERM will result in a kernel.perf_event_paranoid related warning from the perf userspace utility. Signed-off-by: Andrew Murray <andrew.murray@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> 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: Will Deacon <will.deacon@arm.com> 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/1547128414-50693-5-git-send-email-andrew.murray@arm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/perf')
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