Hi Mark,
On 6/27/25 18:20, Mark Brown wrote:
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@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(-)
I have looked through the series and it looks good to me modulo a couple of minor comments left on the patches. Bare in mind fairly new here and this is the first use of hwcap3 so I expect more experienced review is required.
Reviewed-by: Ben Horgan ben.horgan@arm.com
base-commit: 86731a2a651e58953fc949573895f2fa6d456841 change-id: 20250625-arm64-lsfe-0810cf98adc2
Best regards,
Mark Brown broonie@kernel.org
Thanks,
Ben