linux-kernel - Re: [PATCH v3] LoongArch: Remove vcsr in loongarch

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Date:   Thu, 7 Jul 2022 10:58:14 +0100
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     WANG Xuerui <kernel@...0n.name>, Qi Hu <huqi@...ngson.cn>,
        Huacai Chen <chenhuacai@...nel.org>
Cc:     loongarch@...ts.linux.dev, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] LoongArch: Remove vcsr in loongarch_fpu



在 2022/7/7 9:56, WANG Xuerui 写道:
>
> However, the experiment result is counter-intuitive to me after all; 
> are you aware that perhaps *some* 3A5000's in the wild actually have 
> functional VCSR? If so, the state obviously needs isolation 
> (saving/restoring simply becoming no-ops on later steppings), but 
> otherwise this cleanup should be correct.
^ Yep, my concern was 3A5000 with VCSR enabled can be vulnerable.

Thanks
- Jiaxun