Re: [PATCH] riscv: vector: Check SR_SD before saving vstate

[Andy Chiu]

Hi Palmer,

On Thu, Jan 11, 2024 at 10:50 PM <patchwork-bot+linux-riscv@xxxxxxxxxx> wrote:
>
> Hello:
>
> This patch was applied to riscv/linux.git (for-next)

IIUC the conclusion for this thread is not to check SD bit for either
vector or fpu. The patch for this was sent together with the
kernel-mode vector series and has been reviewed-by both Song and Guo.

> by Palmer Dabbelt <palmer@xxxxxxxxxxxx>:
>
> On Thu, 21 Dec 2023 15:04:49 +0800 you wrote:
> > The SD bit summarizes the dirty states of FS, VS, or XS fields,
> > providing a "fast check" before saving fstate or vstate.
> >
> > Let __switch_to_vector() check SD bit as __switch_to_fpu() does.
> >
> > Fixes: 3a2df6323def ("riscv: Add task switch support for vector")
> > Signed-off-by: Song Shuai <songshuaishuai@xxxxxxxxxxx>
> >
> > [...]
>
> Here is the summary with links:
>   - riscv: vector: Check SR_SD before saving vstate
>     https://git.kernel.org/riscv/c/e1b76bc00ed1
>
> You are awesome, thank you!
> --
> Deet-doot-dot, I am a bot.
> https://korg.docs.kernel.org/patchwork/pwbot.html
>
>

Please let me know if I missed anything.

Thanks,
Andy