diff options
Diffstat (limited to 'kernel/events/hw_breakpoint.c')
| -rw-r--r-- | kernel/events/hw_breakpoint.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/events/hw_breakpoint.c b/kernel/events/hw_breakpoint.c index 3cc8416ec844..b48d7039a015 100644 --- a/kernel/events/hw_breakpoint.c +++ b/kernel/events/hw_breakpoint.c @@ -213,6 +213,15 @@ toggle_bp_slot(struct perf_event *bp, bool enable, enum bp_type_idx type, list_del(&bp->hw.bp_list); } +__weak int arch_reserve_bp_slot(struct perf_event *bp) +{ + return 0; +} + +__weak void arch_release_bp_slot(struct perf_event *bp) +{ +} + /* * Function to perform processor-specific cleanup during unregistration */ @@ -270,6 +279,7 @@ static int __reserve_bp_slot(struct perf_event *bp, u64 bp_type) struct bp_busy_slots slots = {0}; enum bp_type_idx type; int weight; + int ret; /* We couldn't initialize breakpoint constraints on boot */ if (!constraints_initialized) @@ -294,6 +304,10 @@ static int __reserve_bp_slot(struct perf_event *bp, u64 bp_type) if (slots.pinned + (!!slots.flexible) > nr_slots[type]) return -ENOSPC; + ret = arch_reserve_bp_slot(bp); + if (ret) + return ret; + toggle_bp_slot(bp, true, type, weight); return 0; @@ -317,6 +331,8 @@ static void __release_bp_slot(struct perf_event *bp, u64 bp_type) enum bp_type_idx type; int weight; + arch_release_bp_slot(bp); + type = find_slot_idx(bp_type); weight = hw_breakpoint_weight(bp); toggle_bp_slot(bp, false, type, weight); |