[PATCH 0/5] arm64: Use memory copy instructions in kernel routines

[Catalin Marinas]

On Mon, 30 Sep 2024 17:10:46 +0100, Kristina Martsenko wrote:
> Here is a small series to make memcpy() and related functions use the
> memory copy/set instructions (Armv8.8 FEAT_MOPS).
> 
> The kernel uses several library routines for copying or initializing
> memory, for example copy_to_user() and memset(). These routines have
> been optimized to make their load/store sequence perform well across a
> range of CPUs. However the chosen sequence can't be the fastest possible
> for every CPU microarchitecture nor for heterogeneous systems, and needs
> to be rewritten periodically as hardware changes.
> 
> [...]

Applied to arm64 (for-next/mops), thanks!

I left the documentation patch as is but it may be helpful to add a
dedicated mops.txt one with some explanations around hypevisor
requirements. Not urgent though.

[1/5] arm64: probes: Disable kprobes/uprobes on MOPS instructions
      https://git.kernel.org/arm64/c/c56c599d9002
[2/5] arm64: mops: Handle MOPS exceptions from EL1
      https://git.kernel.org/arm64/c/13840229d6bd
[3/5] arm64: mops: Document booting requirement for HCR_EL2.MCE2
      https://git.kernel.org/arm64/c/b616058c6613
[4/5] arm64: lib: Use MOPS for memcpy() routines
      https://git.kernel.org/arm64/c/836ed3c4e473
[5/5] arm64: lib: Use MOPS for copy_page() and clear_page()
      https://git.kernel.org/arm64/c/ce6b5ff5f16d

-- 
Catalin