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| author | Nicholas Piggin <npiggin@gmail.com> | 2017-07-10 16:19:38 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-07-18 11:45:47 +1000 |
| commit | 101dd590a7fa37954540cf3149a1c502c0acc524 (patch) | |
| tree | 0d25f21a5c4d5f3a3592de7e82249422065fed92 /arch/mips/math-emu/sp_maddf.c | |
| parent | a70b487b07cf4201bc6702e7f646fa593b23009f (diff) | |
| download | linux-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>
Diffstat (limited to 'arch/mips/math-emu/sp_maddf.c')
0 files changed, 0 insertions, 0 deletions