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| author |   Madhavan Srinivasan <maddy@linux.ibm.com> | 2021-04-08 13:15:03 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-04-14 23:04:19 +1000 |
| commit | 2e2a441d2c0bb639b6fdbb64b15ee0a43599bcec (patch) | |
| tree | 4a41289e05c6b4abce5e817706987ff47caba53e /arch/powerpc/include/asm/perf_event_server.h | |
| parent | powerpc/fadump: make symbol 'rtas_fadump_set_regval' static (diff) | |
| download | wireguard-linux-2e2a441d2c0bb639b6fdbb64b15ee0a43599bcec.tar.xz wireguard-linux-2e2a441d2c0bb639b6fdbb64b15ee0a43599bcec.zip | |
powerpc/perf: Infrastructure to support checking of attr.config*
Introduce code to support the checking of attr.config* for
values which are reserved for a given platform.
Performance Monitoring Unit (PMU) configuration registers
have fields that are reserved and some specific values for
bit fields are reserved. For ex., MMCRA[61:62] is
Random Sampling Mode (SM) and value of 0b11 for this field
is reserved.
Writing non-zero or invalid values in these fields will
have unknown behaviours.
Patch adds a generic call-back function "check_attr_config"
in "struct power_pmu", to be called in event_init to
check for attr.config* values for a given platform.
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210408074504.248211-1-maddy@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include/asm/perf_event_server.h')
| -rw-r--r-- | arch/powerpc/include/asm/perf_event_server.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/perf_event_server.h b/arch/powerpc/include/asm/perf_event_server.h index 00e7e671bb4b..dde97d7d9253 100644 --- a/arch/powerpc/include/asm/perf_event_server.h +++ b/arch/powerpc/include/asm/perf_event_server.h @@ -67,6 +67,12 @@ struct power_pmu { * the pmu supports extended perf regs capability */ int capabilities; + /* + * Function to check event code for values which are + * reserved. Function takes struct perf_event as input, + * since event code could be spread in attr.config* + */ + int (*check_attr_config)(struct perf_event *ev); }; /* |