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

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Date:   Mon, 6 Mar 2023 20:20:41 +0800
From:   maobibo <maobibo@...ngson.cn>
To:     Xi Ruoyao <xry111@...111.site>,
        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



在 2023/3/6 20:09, Xi Ruoyao 写道:
> 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
Got it, thanks for pointing it out, good job:)

Regards
Bibo,Mao
>