[PATCH 0/2] aarch64: Disable ZA state of SME in setjmp and sigsetjmp

[Yury Khrustalev]

Due to the nature of the ZA state, setjmp() should clear it in the
same manner as it is already done by longjmp().

Also add test that checks that ZA state is disabled after setjmp() and
sigsetjmp() and update existing SME test that uses setjmp().

This change can be tested on the FVP model as described in [1].

base commit: 84977600da

Note that there is a corresponding change in the kernel [2], however
it's not a prerequisite for the Glibc change, so the latter can be
merged right now.

[1]: https://inbox.sourceware.org/libc-help/Z9grjmNzxsuPu7iD@arm.com/
[2]: https://lore.kernel.org/all/20250417190113.3778111-1-mark.rutland@arm.com/

---

Yury Khrustalev (2):
  aarch64: Disable ZA state of SME in setjmp and sigsetjmp
  aarch64: update tests for SME

 sysdeps/aarch64/Makefile           |  4 +-
 sysdeps/aarch64/setjmp.S           | 22 ++++++++++
 sysdeps/aarch64/tst-sme-helper.h   | 39 +++++++++++++++++
 sysdeps/aarch64/tst-sme-jmp.c      | 28 ++----------
 sysdeps/aarch64/tst-sme-za-state.c | 68 ++++++++++++++++++++++++++++++
 5 files changed, 136 insertions(+), 25 deletions(-)
 create mode 100644 sysdeps/aarch64/tst-sme-helper.h
 create mode 100644 sysdeps/aarch64/tst-sme-za-state.c

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2.39.5