| commit | 20dd4c624d25156d5ec3345bbb690b98175ef879 | |
| author | Madhavan Srinivasan <maddy@linux.vnet.ibm.com> | |
| Tue, 11 Jul 2017 10:57:49 +0000 (11 16:27 +0530) | ||
| committer | Michael Ellerman <mpe@ellerman.id.au> | |
| Tue, 11 Jul 2017 12:19:36 +0000 (11 22:19 +1000) | ||
| tree | 8e72695d0d3e3c5198851d4779f6dc1cbfaa9343 | treesnapshot (tar.gz zip) |
| parent | 2400fd822f467cb4c886c879d8ad99feac9cf319 | commitdiff |
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: 78b4416aa249 ("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>
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: 78b4416aa249 ("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 | diffblobblamehistory |