Commit f4d2c234 authored Jun 05, 2024 by Ze Zuo

drivers/arm/spe: In-kernel SPE driver for page access profiling

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


CVE: NA

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

Use SPE (Statistical Profiling Extension) feature present
in ARM processors for memory access tracking.

Each cpu core has two buffers, one for storing the raw SPE
data and the other for decoded records.

Signed-off-by: Ze Zuo <zuoze1@huawei.com>
Signed-off-by: Tong Tiangen <tongtiangen@huawei.com>

parent 623051c7

drivers/Kconfig

+2 −0

Original line number	Diff line number	Diff line
		@@ -244,4 +244,6 @@ source "drivers/ub/Kconfig"

		source "drivers/cpuinspect/Kconfig"

		source "drivers/arm/Kconfig"

		endmenu

drivers/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -195,3 +195,4 @@ obj-$(CONFIG_COUNTER) += counter/
		obj-$(CONFIG_MOST) += most/
		obj-$(CONFIG_ROH) += roh/
		obj-$(CONFIG_UB) += ub/
		obj-$(CONFIG_ARM_SPE_MEM_SAMPLING) += arm/spe/

drivers/arm/Kconfig

0 → 100644

+2 −0

Original line number	Diff line number	Diff line
		# SPDX-License-Identifier: GPL-2.0-only
		source "drivers/arm/spe/Kconfig"

drivers/arm/spe/Kconfig

0 → 100644

+10 −0

Original line number	Diff line number	Diff line
		# SPDX-License-Identifier: GPL-2.0-only
		#
		# arm spe dirver
		#
		config ARM_SPE_MEM_SAMPLING
		bool "In-kernel SPE for driver for page access profiling"
		depends on ARM64 && !ARM_SPE_PMU
		help
		Enable support for the ARMv8.2 Statistical Profiling Extension, which
		provides periodic sampling of operations in the CPU pipeline.

drivers/arm/spe/Makefile

0 → 100644

+2 −0

Original line number	Diff line number	Diff line
		# SPDX-License-Identifier: GPL-2.0
		obj-$(CONFIG_ARM_SPE_MEM_SAMPLING) += spe.o spe-decoder/arm-spe-decoder.o spe-decoder/arm-spe-pkt-decoder.o