From: Joel Stanley <joel@jms.id.au>
To: paulus@samba.org, benh@kernel.crashing.org, mpe@ellerman.id.au
Cc: linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 0/3] POWER8 PMU bugfixes
Date: Thu, 3 Jul 2014 15:42:33 +0930 [thread overview]
Message-ID: <1404367956-19515-1-git-send-email-joel@jms.id.au> (raw)
These three patches are required for correct operation of perf counters on
POWER8 boxes when running KVM guests. There were two bugs; not clearing MMCR2
and writing over the saved value when entering a guest. However the first
obscured the second.
Thanks to who mpe helped diagnose the issue and pointed out the fix.
Joel Stanley (3):
powerpc/kvm: Remove redundant save of SIER AND MMCR2
powerpc/perf: Add PPMU_ARCH_207S define
powerpc/perf: Clear MMCR2 when enabling PMU
arch/powerpc/include/asm/perf_event_server.h | 3 +--
arch/powerpc/kvm/book3s_hv_interrupts.S | 5 -----
arch/powerpc/perf/core-book3s.c | 9 ++++++---
arch/powerpc/perf/power8-pmu.c | 2 +-
4 files changed, 8 insertions(+), 11 deletions(-)
--
2.0.0
next reply other threads:[~2014-07-03 6:12 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-03 6:12 Joel Stanley [this message]
2014-07-03 6:12 ` [PATCH 1/3] powerpc/kvm: Remove redundant save of SIER AND MMCR2 Joel Stanley
2014-07-04 2:16 ` Michael Ellerman
2014-07-04 7:46 ` Paul Mackerras
2014-07-04 7:57 ` Alexander Graf
2014-07-03 6:12 ` [PATCH 2/3] powerpc/perf: Add PPMU_ARCH_207S define Joel Stanley
2014-07-04 2:34 ` Michael Ellerman
2014-07-03 6:12 ` [PATCH 3/3] powerpc/perf: Clear MMCR2 when enabling PMU Joel Stanley
2014-07-04 2:36 ` Michael Ellerman
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