From: Mark Rutland <mark.rutland@arm.com>
To: Wooyeon Kim <wooy88.kim@samsung.com>
Cc: hk92.kim@samsung.com, Catalin Marinas <catalin.marinas@arm.com>,
Bhupesh Sharma <bhsharma@redhat.com>,
yb.song@samsung.com, yj.yim@samsung.com,
Julien Grall <julien.grall@arm.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Will Deacon <will@kernel.org>,
jinsoo37.kim@samsung.com, hyewon.ryu@samsung.com,
yhwan.joo@samsung.com, Anisse Astier <aastier@freebox.fr>,
Marc Zyngier <maz@kernel.org>,
Allison Randal <allison@lohutok.net>,
dongww.kim@samsung.com, Sanghoon Lee <shoon114.lee@samsung.com>,
jihun.kim@samsung.com, Dave Martin <Dave.Martin@arm.com>,
hyeyeon5.shim@samsung.com, Kees Cook <keescook@chromium.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Wooki Min <wooki.min@samsung.com>,
Kristina Martsenko <kristina.martsenko@arm.com>,
junik.lee@samsung.com, sgun.bae@samsung.com,
Jeongtae Park <jtp.park@samsung.com>,
kgene.kim@samsung.com, Thomas Gleixner <tglx@linutronix.de>,
linux-arm-kernel@lists.infradead.org,
Steve Capper <steve.capper@arm.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, James Morse <james.morse@arm.com>,
Sudeep Holla <sudeep.holla@arm.com>,
dh.han@samsung.com
Subject: Re: [PATCH] arm64: fpsimd: Added API to manage fpsimd state inside kernel
Date: Fri, 5 Jun 2020 11:37:05 +0100 [thread overview]
Message-ID: <20200605103705.GD85498@C02TD0UTHF1T.local> (raw)
In-Reply-To: <20200605073052.23044-1-wooy88.kim@samsung.com>
Hi Wooyeon,
There are a *lot* of people Cc' here, many of whomo will find this
irrelevant. Please try to keep the Cc list constrained to a reasonable
number of interested parties.
On Fri, Jun 05, 2020 at 04:30:52PM +0900, Wooyeon Kim wrote:
> From: Wooki Min <wooki.min@samsung.com>
>
> This is an patch to use FPSIMD register in Kernel space.
> It need to manage to use FPSIMD register without damaging it
> of the user task.
> Following items have been implemented and added.
Please introduce the problem you are trying to solve in more detail. We
already have kernel_neon_{begin,end}() for kernel-mode NEON; why is that
not sufficient for your needs? Please answer this before considering
other details.
What do you want to use this for?
>
> 1. Using FPSIMD in ISR (in_interrupt)
> It can used __efi_fpsimd_begin/__efi_fpsimd_end
> which is already implemented.
> Save fpsimd state before entering ISR,
> and restore fpsimd state after ISR ends.
> For use in external kernel module,
> it is declared as EXPORT_SYMBOL.
This patch adds no in-tree modular users of this, so per the usual
conventions, NAK to EXPORT_SYMBOL().
Thanks,
Mark.
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next prev parent reply other threads:[~2020-06-05 10:37 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20200605073214epcas2p1576f3f90dbcefaad6180f2559ca5980d@epcas2p1.samsung.com>
2020-06-05 7:30 ` [PATCH] arm64: fpsimd: Added API to manage fpsimd state inside kernel Wooyeon Kim
2020-06-05 10:37 ` Mark Rutland [this message]
2020-06-08 10:34 ` Dave Martin
2020-06-11 9:17 ` ???
2020-06-11 12:47 ` Mark Rutland
2020-06-11 9:42 ` Wooyeon Kim
2020-06-11 14:11 ` Catalin Marinas
2020-06-15 10:30 ` Dave Martin
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