hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IC8KS8 CVE: NA -------------------------------- Introduce a tracing interface that allows eBPF programs to access hardware memory access data collected via the SPE framework. This interface enables user-space memory profiling and custom analysis without relying on the perf subsystem, and supports integration with BPF-based observability tools. For example, it can be used to track physical memory accesses and identify threads with cross-NUMA access patterns online, supporting integration with BPF-based observability tools. Signed-off-by: Ze Zuo <zuoze1@huawei.com> Signed-off-by: Tong Tiangen <tongtiangen@huawei.com> --- drivers/arm/mm_monitor/mm_spe.c | 2 ++ include/trace/events/kmem.h | 26 ++++++++++++++++++++++++++ 2 files changed, 28 insertions(+) diff --git a/drivers/arm/mm_monitor/mm_spe.c b/drivers/arm/mm_monitor/mm_spe.c index cbde84c228a0..38e236fed36c 100644 --- a/drivers/arm/mm_monitor/mm_spe.c +++ b/drivers/arm/mm_monitor/mm_spe.c @@ -12,6 +12,7 @@ #include <linux/of_device.h> #include <linux/perf/arm_pmu.h> #include <linux/mem_sampling.h> +#include <trace/events/kmem.h> #include "spe-decoder/arm-spe-decoder.h" #include "spe-decoder/arm-spe-pkt-decoder.h" @@ -385,6 +386,7 @@ void mm_spe_record_enqueue(struct arm_spe_record *record) return; } + trace_mm_spe_record((struct mem_sampling_record *)record); record_tail = spe_buf->record_base + spe_buf->nr_records * SPE_RECORD_ENTRY_SIZE; *record_tail = *(struct mem_sampling_record *)record; diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h index a4e40ae6a8c8..d3fc4f4e15c2 100644 --- a/include/trace/events/kmem.h +++ b/include/trace/events/kmem.h @@ -8,6 +8,9 @@ #include <linux/types.h> #include <linux/tracepoint.h> #include <trace/events/mmflags.h> +#ifdef CONFIG_MEM_SAMPLING +#include <linux/mem_sampling.h> +#endif TRACE_EVENT(kmem_cache_alloc, @@ -409,6 +412,29 @@ TRACE_EVENT(rss_stat, __print_symbolic(__entry->member, TRACE_MM_PAGES), __entry->size) ); +#ifdef CONFIG_ARM_SPE_MEM_SAMPLING +TRACE_EVENT(mm_spe_record, + TP_PROTO(struct mem_sampling_record *record), + + TP_ARGS(record), + + TP_STRUCT__entry( + __field(u64, vaddr) + __field(u64, paddr) + __field(int, pid) + ), + + TP_fast_assign( + __entry->vaddr = record->virt_addr; + __entry->paddr = record->phys_addr; + __entry->pid = record->context_id; + + ), + + TP_printk("vaddr=%llu paddr=%llu pid=%d", + __entry->vaddr, __entry->paddr, __entry->pid) +); +#endif /* CONFIG_ARM_SPE_MEM_SAMPLING */ #endif /* _TRACE_KMEM_H */ /* This part must be outside protection */ -- 2.25.1