@@ -1588,6 +1588,13 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git
F: arch/arm/mach-*/
F: arch/arm/plat-*/
+HARDWARE PREFETCH DRIVERS
+M: Kohei Tarumizu <tarumizu.kohei@fujitsu.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: drivers/hwpf/
+F: include/linux/hwpf.h
+
ARM/ACTIONS SEMI ARCHITECTURE
M: Andreas Färber <afaerber@suse.de>
M: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
@@ -20,6 +20,12 @@ config ARCH_SUNXI
help
This enables support for Allwinner sunxi based SoCs like the A64.
+config ARCH_A64FX
+ bool "Fujitsu A64FX Platforms"
+ select ARCH_HAS_HARDWARE_PREFETCH
+ help
+ This enables support for Fujitsu A64FX SoC family.
+
config ARCH_ALPINE
bool "Annapurna Labs Alpine platform"
select ALPINE_MSI if PCI
@@ -1356,6 +1356,18 @@ config X86_CPUID
with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
/dev/cpu/31/cpuid.
+config INTEL_HARDWARE_PREFETCH
+ tristate "Intel Hardware Prefetch support"
+ select ARCH_HAS_HARDWARE_PREFETCH
+ select HARDWARE_PREFETCH
+ depends on X86_64
+ help
+ This option enables a Hardware Prefetch sysfs interface.
+ This requires an Intel processor that has MSR about Hardware Prefetch.
+
+ See Documentation/ABI/testing/sysfs-devices-system-cpu for more
+ information.
+
choice
prompt "High Memory Support"
default HIGHMEM4G
@@ -236,4 +236,6 @@ source "drivers/interconnect/Kconfig"
source "drivers/counter/Kconfig"
source "drivers/most/Kconfig"
+
+source "drivers/hwpf/Kconfig"
endmenu
@@ -188,3 +188,4 @@ obj-$(CONFIG_GNSS) += gnss/
obj-$(CONFIG_INTERCONNECT) += interconnect/
obj-$(CONFIG_COUNTER) += counter/
obj-$(CONFIG_MOST) += most/
+obj-$(CONFIG_HARDWARE_PREFETCH) += hwpf/
new file mode 100644
@@ -0,0 +1,24 @@
+config ARCH_HAS_HARDWARE_PREFETCH
+ bool
+
+menuconfig HARDWARE_PREFETCH
+ bool "Hardware Prefetch Control"
+ depends on ARCH_HAS_HARDWARE_PREFETCH
+ default y
+ help
+ Hardware Prefetch Control Driver
+
+ This driver allows you to control the Hardware Prefetch mechanism.
+ If the hardware supports the mechanism, it provides a sysfs interface
+ for changing the feature's enablement, prefetch distance and strongness.
+
+if HARDWARE_PREFETCH
+
+config A64FX_HARDWARE_PREFETCH
+ tristate "A64FX Hardware Prefetch support"
+ depends on ARCH_A64FX
+ default m
+ help
+ This adds Hardware Prefetch driver support for A64FX SOCs.
+
+endif
new file mode 100644
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+# Hardware prefetch core driver
+obj-$(CONFIG_HARDWARE_PREFETCH) += hwpf.o
+
+# FUJITSU SoC driver
+obj-$(CONFIG_A64FX_HARDWARE_PREFETCH) += fujitsu_hwpf.o
+
+# Intel SoC driver
+obj-$(CONFIG_INTEL_HARDWARE_PREFETCH) += intel_hwpf.o
This adds kconfig/Makefile to build hardware prefetch driver for A64FX and Intel support. This also add MAINTAINERS entry. Note that this is the first time to add A64FX specific driver, this adds A64FX entry in Kconfig.platforms of arm64 Kconfig. Signed-off-by: Kohei Tarumizu <tarumizu.kohei@fujitsu.com> --- MAINTAINERS | 7 +++++++ arch/arm64/Kconfig.platforms | 6 ++++++ arch/x86/Kconfig | 12 ++++++++++++ drivers/Kconfig | 2 ++ drivers/Makefile | 1 + drivers/hwpf/Kconfig | 24 ++++++++++++++++++++++++ drivers/hwpf/Makefile | 9 +++++++++ 7 files changed, 61 insertions(+) create mode 100644 drivers/hwpf/Kconfig create mode 100644 drivers/hwpf/Makefile