On 6/7/22 05:05, Kohei Tarumizu wrote: > diff --git a/drivers/soc/fujitsu/Kconfig b/drivers/soc/fujitsu/Kconfig > new file mode 100644 > index 000000000000..6c5990b75cc5 > --- /dev/null > +++ b/drivers/soc/fujitsu/Kconfig > @@ -0,0 +1,26 @@ > +# SPDX-License-Identifier: GPL-2.0-only > + > +menu "Fujitsu SoC drivers" > + > +config ALLOW_INCOMPLETE_CACHE_SYSFS > + bool > + > +config A64FX_HWPF_CONTROL > + tristate "A64FX Hardware Prefetch Control driver" > + depends on ARM64 > + select ALLOW_INCOMPLETE_CACHE_SYSFS > + help > + This provides a sysfs interface to control the Hardware Prefetch > + behavior for A64FX. > + > + A64FX has IMP_PF_STREAM_DETECT_CTRL_EL0, which can control the > + hardware prefech behavior. If the processor supports this, the prefetch > + module can be loaded with the name a64fx-pfctl. > + > + Depending on the characteristics of the application, this register > + parameters improve or degrade performance. > + > + Please see Documentation/ABI/testing/sysfs-devices-system-cpu for > + more information. -- ~Randy
