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Madhavan Srinivasan
2e2a441d2c
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
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