linux-kernel - [PATCH v2 0/2] arm64/sme: Fix handling of traps on resume

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Message-Id: <20240203-arm64-sme-resume-v2-0-a1fbaddc4425@kernel.org>
Date: Sat, 03 Feb 2024 13:00:39 +0000
From: Mark Brown <broonie@...nel.org>
To: Catalin Marinas <catalin.marinas@....com>, 
 Will Deacon <will@...nel.org>
Cc: Dave Martin <Dave.Martin@....com>, 
 Jackson Cooper-Driver <Jackson.Cooper-Driver@....com>, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Mark Brown <broonie@...nel.org>
Subject: [PATCH v2 0/2] arm64/sme: Fix handling of traps on resume

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@...nel.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 SMCR 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,
-- 
Mark Brown <broonie@...nel.org>