On Thu, 18 Mar 2021 20:10:52 -0700, Peter Collingbourne wrote:
> In an upcoming change we are going to introduce per-task SCTLR_EL1
> bits for PAC. Move the existing per-task SCTLR_EL1 field out of the
> MTE-specific code so that we will be able to use it from both the
> PAC and MTE code paths and make the task switching code more efficient.
Applied to arm64 (for-next/pac-set-get-enabled-keys).
Peter, can you please have a look and give it a try as part of the arm64
for-next/core branch? I rebased your patches on top of the
for-next/mte-async-kernel-mode branch as this was adding more code to
mte_thread_switch(), so I kept the function for now.
Thanks.
[1/3] arm64: mte: make the per-task SCTLR_EL1 field usable elsewhere
https://git.kernel.org/arm64/c/2f79d2fc391e
[2/3] arm64: Introduce prctl(PR_PAC_{SET,GET}_ENABLED_KEYS)
https://git.kernel.org/arm64/c/201698626fbc
[3/3] arm64: pac: Optimize kernel entry/exit key installation code paths
https://git.kernel.org/arm64/c/b90e483938ce
--
Catalin
