David E. Garcia Porras d97cfb33ae lib: sbi_pmu: Return invalid param error for reserved event_idx bits ...

As per section 11.14 of the SBI specification (Function: Get PMU Event
Info, FID #8), Table 47, the event_idx word of an event info entry
only uses BIT[0:19]; BIT[20:31] are reserved for the future purpose
and must be zero. Table 48 further requires the SBI implementation to
return SBI_ERR_INVALID_PARAM if any reserved bit in an event_idx word
is set.

sbi_pmu_event_get_info() does not check the reserved bits, so a
malformed event_idx is silently passed on to pmu_event_validate()
instead of failing the call. Add SBI_PMU_EVENT_IDX_MBZ_MASK covering
the must-be-zero bits and return SBI_ERR_INVALID_PARAM when any of
them are set.

Fixes: e434584216 ("lib: sbi_pmu: Implement SBI PMU event info function")
Signed-off-by: David E. Garcia Porras <david.garcia@aheadcomputing.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260818210023.466462-2-david.garcia@aheadcomputing.com
Signed-off-by: Anup Patel <anup@brainfault.org>

2026-09-03 13:27:45 +05:30

..

sbi

lib: sbi_pmu: Return invalid param error for reserved event_idx bits

2026-09-03 13:27:45 +05:30

sbi_utils

lib: utils/suspend: wait for the secondary Andes harts to sleep

2026-09-01 10:46:23 +05:30