Commit f71523ca authored by Ze Zuo's avatar Ze Zuo
Browse files

tracing, mem-sampling-sample: Adding tracking events to hardware-sampled page access 

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I9GZAQ


CVE: NA

--------------------------------

Provide a tracing interface for eBPF to collect hardware memory access
data in user space.

Signed-off-by: default avatarZe Zuo <zuoze1@huawei.com>
Signed-off-by: default avatarTong Tiangen <tongtiangen@huawei.com>
parent 06fcc73c

drivers/arm/spe/spe.c

+3 −0
Original line number Diff line number Diff line
@@ -14,6 +14,8 @@ 
#include <linux/perf/arm_pmu.h>

#include <linux/platform_device.h>

#include <linux/mem_sampling.h>

#include <linux/perf/arm_pmu.h>

#include <trace/events/kmem.h>



#include "spe-decoder/arm-spe-decoder.h"

#include "spe-decoder/arm-spe-pkt-decoder.h"
@@ -687,6 +689,7 @@ void arm_spe_record_enqueue(struct arm_spe_record *record) 
		return;

	}



	trace_spe_record((struct mem_sampling_record *)record, smp_processor_id());

	record_tail = spe_buf->record_base +

			spe_buf->nr_records * SPE_RECORD_ENTRY_SIZE;

	*record_tail = *(struct mem_sampling_record *)record;

include/trace/events/kmem.h

+27 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 
#include <linux/types.h>

#include <linux/tracepoint.h>

#include <trace/events/mmflags.h>

#include <linux/mem_sampling.h>



DECLARE_EVENT_CLASS(kmem_alloc,
@@ -416,6 +417,32 @@ TRACE_EVENT(mm_mem_sampling_access_record, 
		__entry->cpuid, __entry->pid)

);

#endif /* CONFIG_NUMABALANCING_MEM_SAMPLING */

#ifdef CONFIG_ARM_SPE_MEM_SAMPLING

TRACE_EVENT(spe_record,

	TP_PROTO(struct mem_sampling_record *record, int cpuid),



	TP_ARGS(record, cpuid),



	TP_STRUCT__entry(

		__field(u64, vaddr)

		__field(u64, paddr)

	__field(int, cpuid)

		__field(int, pid)

	),



	TP_fast_assign(

		__entry->vaddr = record->virt_addr;

		__entry->paddr = record->phys_addr;

	__entry->cpuid = cpuid;

		__entry->pid = record->context_id;



	),



	TP_printk("vaddr=%llu paddr=%llu cpuid=%d pid=%d",

		__entry->vaddr, __entry->paddr,

		__entry->cpuid, __entry->pid)

);

#endif /* CONFIG_ARM_SPE_MEM_SAMPLING */

#endif /* _TRACE_KMEM_H */



/* This part must be outside protection */