David E. Garcia Porras 3d29f380a6 lib: sbi_pmu: Honor CLEAR_VALUE/AUTO_START for all hardware event types ...

sbi_pmu_ctr_cfg_match() only acts on SBI_PMU_CFG_FLAG_CLEAR_VALUE and
SBI_PMU_CFG_FLAG_AUTO_START when the event type is SBI_PMU_EVENT_TYPE_HW.
However, pmu_ctr_find_hw() allocates a hardware counter from the same
hw_event_map for SBI_PMU_EVENT_TYPE_HW_CACHE, SBI_PMU_EVENT_TYPE_HW_RAW,
and SBI_PMU_EVENT_TYPE_HW_RAW_V2 as well, and the start/clear helpers
(pmu_ctr_start_hw, pmu_ctr_write_hw) operate on the counter index alone
and are agnostic to the event type. As a result, when a supervisor
configures a HW_CACHE/HW_RAW/HW_RAW_V2 event with these flags, the
counter is programmed and recorded in active_events[] but is never
cleared or started, requiring an extra SBI call to make it count.

Extend the check to cover all hardware-counter event types so that
the configuration flags take effect for HW_CACHE and raw events too.

Deliberately avoiding using "not FW" logic to be explicit about
HW-backed events only.

Fixes: 13d40f21 ("lib: sbi: Add PMU support")
Signed-off-by: David E. Garcia Porras <david.garcia@aheadcomputing.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260522144608.3433470-1-david.garcia@aheadcomputing.com
Signed-off-by: Anup Patel <anup@brainfault.org>

2026-06-12 18:59:40 +05:30

..

sbi

lib: sbi_pmu: Honor CLEAR_VALUE/AUTO_START for all hardware event types

2026-06-12 18:59:40 +05:30

utils

platform: generic: Optimize extensions_init() to parse ISA extensions once

2026-06-12 16:08:29 +05:30