From: Randy Dunlap <rdunlap@infradead.org>
To: Kohei Tarumizu <tarumizu.kohei@fujitsu.com>,
catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com,
x86@kernel.org, hpa@zytor.com, rafael@kernel.org,
lenb@kernel.org, gregkh@linuxfoundation.org,
mchehab+huawei@kernel.org, eugenis@google.com,
tony.luck@intel.com, pcc@google.com, peterz@infradead.org,
marcos@orca.pet, marcan@marcan.st, linus.walleij@linaro.org,
nicolas.ferre@microchip.com, conor.dooley@microchip.com,
arnd@arndb.de, ast@kernel.org, peter.chen@kernel.org,
kuba@kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org
Subject: Re: [PATCH v5 2/6] soc: fujitsu: Add Kconfig/Makefile to build hardware prefetch control driver
Date: Tue, 7 Jun 2022 07:40:46 -0700 [thread overview]
Message-ID: <7b76ac34-1c50-c0da-9bf3-d05bdd9959cb@infradead.org> (raw)
In-Reply-To: <20220607120530.2447112-3-tarumizu.kohei@fujitsu.com>
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
next prev parent reply other threads:[~2022-06-07 14:45 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-07 12:05 [PATCH v5 0/6] Add hardware prefetch control driver for A64FX and x86 Kohei Tarumizu
2022-06-07 12:05 ` [PATCH v5 1/6] soc: fujitsu: Add hardware prefetch control driver for A64FX Kohei Tarumizu
2022-06-10 13:20 ` Greg KH
2022-06-07 12:05 ` [PATCH v5 2/6] soc: fujitsu: Add Kconfig/Makefile to build hardware prefetch control driver Kohei Tarumizu
2022-06-07 14:40 ` Randy Dunlap [this message]
2022-06-07 12:05 ` [PATCH v5 3/6] arm64: Create cache sysfs directory without ACPI PPTT for hardware prefetch control Kohei Tarumizu
2022-06-07 12:05 ` [PATCH v5 4/6] x86: Add hardware prefetch control driver for x86 Kohei Tarumizu
2022-06-07 12:05 ` [PATCH v5 5/6] x86: Add Kconfig/Makefile to build hardware prefetch control driver Kohei Tarumizu
2022-06-07 14:40 ` Randy Dunlap
2022-06-08 6:11 ` tarumizu.kohei
2022-06-07 12:05 ` [PATCH v5 6/6] docs: ABI: Add sysfs documentation interface of " Kohei Tarumizu
2022-06-10 13:07 ` [PATCH v5 0/6] Add hardware prefetch control driver for A64FX and x86 Greg KH
2022-06-14 11:55 ` tarumizu.kohei
2022-06-14 12:34 ` 'Greg KH'
2022-06-17 9:20 ` tarumizu.kohei
2022-06-27 9:36 ` Linus Walleij
2022-06-28 13:55 ` tarumizu.kohei
2022-06-28 16:39 ` Luck, Tony
2022-06-30 5:24 ` tarumizu.kohei
2022-06-28 15:46 ` Dave Hansen
2022-06-28 20:20 ` Linus Walleij
2022-06-28 21:01 ` Dave Hansen
2022-06-28 21:17 ` Linus Walleij
2022-06-30 9:43 ` tarumizu.kohei
2022-06-10 13:48 ` Linus Walleij
2022-06-17 9:06 ` tarumizu.kohei
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