linux-kernel - [PATCH v2 2/8] drivers: base: Add Kconfig/Makefile to build hardware prefetch control core driver

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Date:   Fri, 11 Mar 2022 19:19:34 +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 v2 2/8] drivers: base: Add Kconfig/Makefile to build hardware prefetch control core driver

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

Signed-off-by: Kohei Tarumizu <tarumizu.kohei@...itsu.com>
---
 MAINTAINERS           |  6 ++++++
 drivers/base/Kconfig  | 13 +++++++++++++
 drivers/base/Makefile |  1 +
 3 files changed, 20 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 05fd080b82f3..213537cea2e2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8452,6 +8452,12 @@ F:	include/linux/hwmon*.h
 F:	include/trace/events/hwmon*.h
 K:	(devm_)?hwmon_device_(un)?register(|_with_groups|_with_info)
 
+HARDWARE PREFETCH CONTROL DRIVERS
+M:	Kohei Tarumizu <tarumizu.kohei@...itsu.com>
+S:	Maintained
+F:	drivers/base/pfctl.c
+F:	include/linux/pfctl.h
+
 HARDWARE RANDOM NUMBER GENERATOR CORE
 M:	Matt Mackall <mpm@...enic.com>
 M:	Herbert Xu <herbert@...dor.apana.org.au>
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index 6f04b831a5c0..d146604b5b3a 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -230,4 +230,17 @@ config GENERIC_ARCH_NUMA
 	  Enable support for generic NUMA implementation. Currently, RISC-V
 	  and ARM64 use it.
 
+config ARCH_HAS_HWPF_CONTROL
+	bool
+
+config HWPF_CONTROL
+	bool "Hardware Prefetch Control driver"
+	depends on ARCH_HAS_HWPF_CONTROL && SYSFS
+	help
+	  This driver allows user to control CPU's Hardware Prefetch behavior.
+	  If the machine supports this behavior, it provides a sysfs interface.
+
+	  See Documentation/ABI/testing/sysfs-devices-system-cpu for more
+	  information.
+
 endmenu
diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index 02f7f1358e86..13f3a0ddf3d1 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_DEV_COREDUMP) += devcoredump.o
 obj-$(CONFIG_GENERIC_MSI_IRQ_DOMAIN) += platform-msi.o
 obj-$(CONFIG_GENERIC_ARCH_TOPOLOGY) += arch_topology.o
 obj-$(CONFIG_GENERIC_ARCH_NUMA) += arch_numa.o
+obj-$(CONFIG_HWPF_CONTROL)	+= pfctl.o
 
 obj-y			+= test/
 
-- 
2.27.0