linux-kernel - Re: [PATCH V3] LoongArch: Provide kernel fpu functions

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Message-ID: <95273478173af301f3b63b9be2559213e4f29fb8.camel@xry111.site>
Date:   Mon, 06 Mar 2023 20:09:07 +0800
From:   Xi Ruoyao <xry111@...111.site>
To:     maobibo <maobibo@...ngson.cn>,
        Huacai Chen <chenhuacai@...ngson.cn>,
        Arnd Bergmann <arnd@...db.de>,
        Huacai Chen <chenhuacai@...nel.org>
Cc:     loongarch@...ts.linux.dev, linux-arch@...r.kernel.org,
        Xuefeng Li <lixuefeng@...ngson.cn>,
        Guo Ren <guoren@...nel.org>, Xuerui Wang <kernel@...0n.name>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        linux-kernel@...r.kernel.org, loongson-kernel@...ts.loongnix.cn
Subject: Re: [PATCH V3] LoongArch: Provide kernel fpu functions

On Mon, 2023-03-06 at 20:03 +0800, maobibo wrote:
> 在 2023/3/6 17:59, Huacai Chen 写道:
> > Provide kernel_fpu_begin()/kernel_fpu_end() to allow the kernel itself
> > to use fpu. They can be used by some other kernel components, e.g., the
> > AMDGPU graphic driver for DCN.
> Since kernel is compiled with -msoft-float, I guess hw fpu will not be
> used in kernel by present:). However it is deserved to try.

See the draft AMD DCN support patch:
https://github.com/loongson/linux/commit/0ee299095c963938a7626c3121a8feef32251301

-- 
Xi Ruoyao <xry111@...111.site>
School of Aerospace Science and Technology, Xidian University