Re: [PATCH RESEND v4 0/2] riscv: errata: thead: use riscv_nonstd_cache_ops for CMO

From: patchwork-bot+linux-riscv
Date: Thu Jan 11 2024 - 09:51:23 EST


Hello:

This series was applied to riscv/linux.git (for-next)
by Palmer Dabbelt <palmer@xxxxxxxxxxxx>:

On Tue, 14 Nov 2023 22:33:36 +0800 you wrote:
> Previously, we use alternative mechanism to dynamically patch
> the CMO operations for THEAD C906/C910 during boot for performance
> reason. But as pointed out by Arnd, "there is already a significant
> cost in accessing the invalidated cache lines afterwards, which is
> likely going to be much higher than the cost of an indirect branch".
> And indeed, there's no performance difference with GMAC and EMMC per
> my test on Sipeed Lichee Pi 4A board.
>
> [...]

Here is the summary with links:
- [RESEND,v4,1/2] riscv: errata: thead: use riscv_nonstd_cache_ops for CMO
https://git.kernel.org/riscv/c/a4ff64edf9ed
- [RESEND,v4,2/2] riscv: errata: thead: use pa based instructions for CMO
https://git.kernel.org/riscv/c/3690492612ec

You are awesome, thank you!
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