[PATCH 0/3] arm64: Support FEAT_LSFE (Large System Float Extension)

[Mark Brown]

FEAT_LSFE is optional from v9.5, it adds new instructions for atomic
memory operations with floating point values.  We have no immediate use
for it in kernel, provide a hwcap so userspace can discover it and allow
the ID register field to be exposed to KVM guests.

Signed-off-by: Mark Brown <broonie at kernel.org>
---
Mark Brown (3):
      arm64/hwcap: Add hwcap for FEAT_LSFE
      KVM: arm64: Expose FEAT_LSFE to guests
      kselftest/arm64: Add lsfe to the hwcaps test

 Documentation/arch/arm64/elf_hwcaps.rst   |  4 ++++
 arch/arm64/include/asm/hwcap.h            |  1 +
 arch/arm64/include/uapi/asm/hwcap.h       |  1 +
 arch/arm64/kernel/cpufeature.c            |  2 ++
 arch/arm64/kernel/cpuinfo.c               |  1 +
 arch/arm64/kvm/sys_regs.c                 |  4 +++-
 tools/testing/selftests/arm64/abi/hwcap.c | 21 +++++++++++++++++++++
 7 files changed, 33 insertions(+), 1 deletion(-)
---
base-commit: 86731a2a651e58953fc949573895f2fa6d456841
change-id: 20250625-arm64-lsfe-0810cf98adc2

Best regards,
--  
Mark Brown <broonie at kernel.org>