]> git.baikalelectronics.ru Git - kernel.git/commit
powerpc/perf: Fix SDAR_MODE value for continous sampling on Power9
authorMadhavan Srinivasan <maddy@linux.vnet.ibm.com>
Tue, 11 Jul 2017 10:57:49 +0000 (16:27 +0530)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 11 Jul 2017 12:19:36 +0000 (22:19 +1000)
commite31d7ba28f340b6d597a291c97b6f688d95e4916
tree8e72695d0d3e3c5198851d4779f6dc1cbfaa9343
parent76a0eeb4a05be8782c949f065ee01150b9f2f082
powerpc/perf: Fix SDAR_MODE value for continous sampling on Power9

In case of continous sampling (non-marked), the code currently
sets MMCRA[SDAR_MODE] to 0b01 (Update on TLB miss) for Power9 DD1.

On DD2 and later it copies the sdar_mode value from the event code,
which for most events is 0b00 (No updates).

However we must set a non-zero value for SDAR_MODE when doing
continuous sampling, so honor the event code, unless it's zero, in
which case we use use 0b01 (Update on TLB miss).

Fixes: 19d6ca4b8d15 ("powerpc/perf: Handle sdar_mode for marked event in power9")
Cc: stable@vger.kernel.org # v4.11+
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/perf/isa207-common.c