mbox series

[v3,0/2] arm64/sme: Fix handling of traps on resume

Message ID 20240213-arm64-sme-resume-v3-0-17e05e493471@kernel.org
Headers
Series arm64/sme: Fix handling of traps on resume |

Message

Mark Brown Feb. 13, 2024, 11:06 p.m. UTC 
  The fast model was recently changed to reset system registers to 0 on
resume, exposing the fact that for SME we do not restore the
configuration of traps for extensions that add state.  Fix this.

Signed-off-by: Mark Brown <broonie@kernel.org>
---
Changes in v3:
- Tweak commit message.
- Link to v2: https://lore.kernel.org/r/20240203-arm64-sme-resume-v2-0-a1fbaddc4425@kernel.org

Changes in v2:
- Also reinitialise SMPRI_EL1.
- Link to v1: https://lore.kernel.org/r/20240130-arm64-sme-resume-v1-0-0e60ebba18df@kernel.org

---
Mark Brown (2):
      arm64/sme: Restore SME registers on exit from suspend
      arm64/sme: Restore SMCR_EL1.EZT0 on exit from suspend

 arch/arm64/include/asm/fpsimd.h |  2 ++
 arch/arm64/kernel/fpsimd.c      | 16 ++++++++++++++++
 arch/arm64/kernel/suspend.c     |  3 +++
 3 files changed, 21 insertions(+)
---
base-commit: 41bccc98fb7931d63d03f326a746ac4d429c1dd3
change-id: 20240129-arm64-sme-resume-3266150292b6

Best regards,

Comments

Will Deacon Feb. 20, 2024, 2:04 p.m. UTC | #1 
On Tue, 13 Feb 2024 23:06:31 +0000, Mark Brown wrote:
> The fast model was recently changed to reset system registers to 0 on
> resume, exposing the fact that for SME we do not restore the
> configuration of traps for extensions that add state.  Fix this.
> 
> 

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

[1/2] arm64/sme: Restore SME registers on exit from suspend
      https://git.kernel.org/arm64/c/9533864816fb
[2/2] arm64/sme: Restore SMCR_EL1.EZT0 on exit from suspend
      https://git.kernel.org/arm64/c/d7b77a0d565b

Cheers,