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authorNicholas Piggin <npiggin@gmail.com>2017-07-10 16:19:38 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2017-07-18 11:45:47 +1000
commit101dd590a7fa37954540cf3149a1c502c0acc524 (patch)
tree0d25f21a5c4d5f3a3592de7e82249422065fed92 /.cocciconfig
parenta70b487b07cf4201bc6702e7f646fa593b23009f (diff)
downloadlinux-101dd590a7fa37954540cf3149a1c502c0acc524.tar.bz2
powerpc/perf: Avoid spurious PMU interrupts after idle
POWER9 DD2 can see spurious PMU interrupts after state-loss idle in some conditions. A solution is to save and reload MMCR0 over state-loss idle. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Acked-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Tested-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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