linux-kernel - [PATCH 4/8] arm64: Add Kconfig/Makefile to build hardware prefetch control driver

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Date:   Tue, 25 Jan 2022 16:14:10 +0900
From:   Kohei Tarumizu <tarumizu.kohei@...itsu.com>
To:     catalin.marinas@....com, will@...nel.org, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        x86@...nel.org, hpa@...or.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     tarumizu.kohei@...itsu.com
Subject: [PATCH 4/8] arm64: Add Kconfig/Makefile to build hardware prefetch control driver

This adds Kconfig/Makefile to build hardware prefetch control driver
for arm64 support. This also adds a MAINTAINERS entry.

Signed-off-by: Kohei Tarumizu <tarumizu.kohei@...itsu.com>
---
 MAINTAINERS                | 1 +
 arch/arm64/Kconfig         | 8 ++++++++
 arch/arm64/kernel/Makefile | 1 +
 3 files changed, 10 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index b474051c41e7..0eaee76438e9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8447,6 +8447,7 @@ K:	(devm_)?hwmon_device_(un)?register(|_with_groups|_with_info)
 HARDWARE PREFETCH CONTROL DRIVERS
 M:	Kohei Tarumizu <tarumizu.kohei@...itsu.com>
 S:	Maintained
+F:	arch/arm64/kernel/pfctl.c
 F:	drivers/base/pfctl.c
 F:	include/linux/pfctl.h
 
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 6978140edfa4..c2256dbb0243 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -36,6 +36,7 @@ config ARM64
 	select ARCH_HAS_SET_DIRECT_MAP
 	select ARCH_HAS_SET_MEMORY
 	select ARCH_STACKWALK
+	select ARCH_HAS_HWPF_CONTROL
 	select ARCH_HAS_STRICT_KERNEL_RWX
 	select ARCH_HAS_STRICT_MODULE_RWX
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
@@ -1941,6 +1942,13 @@ config STACKPROTECTOR_PER_TASK
 	def_bool y
 	depends on STACKPROTECTOR && CC_HAVE_STACKPROTECTOR_SYSREG
 
+config ARM64_HWPF_CONTROL
+	tristate "ARM64 Hardware Prefetch Control support"
+	depends on HWPF_CONTROL
+	default m
+	help
+	  This adds Hardware Prefetch Control driver support for ARM64.
+
 endmenu
 
 menu "Boot options"
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index 88b3e2a21408..d5eb1dc6bfa6 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -73,6 +73,7 @@ obj-$(CONFIG_ARM64_PTR_AUTH)		+= pointer_auth.o
 obj-$(CONFIG_ARM64_MTE)			+= mte.o
 obj-y					+= vdso-wrap.o
 obj-$(CONFIG_COMPAT_VDSO)		+= vdso32-wrap.o
+obj-$(CONFIG_ARM64_HWPF_CONTROL)	+= pfctl.o
 
 obj-y					+= probes/
 head-y					:= head.o
-- 
2.27.0