Re: [PATCH v4 1/2] arm64: mte: make the per-task SCTLR_EL1 field usable elsewhere

Hi Peter,

On Fri, Nov 27, 2020 at 07:13:43PM +0000, Catalin Marinas wrote:

On Thu, 19 Nov 2020 19:29:46 -0800, Peter Collingbourne wrote:

quoted

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-keys-ctrl), thanks!

[1/2] arm64: mte: make the per-task SCTLR_EL1 field usable elsewhere
      https://git.kernel.org/arm64/c/e710c29e0177
[2/2] arm64: Introduce prctl(PR_PAC_{SET,GET}_ENABLED_KEYS)
      https://git.kernel.org/arm64/c/284c64e9eba3

If Dave has any other comments next week, we can apply them on top.

I'm dropping these patches from the arm64 tree as they conflict
(and not in a trivial way) with the MTE patches queued in the mm tree.

So we either wait until 5.12 or we try to merge them via Andrew on top
of the mm tree. Given the interaction with MTE, I'm slightly inclined
towards the former.

-- 
Catalin