arm64: enable the Permission Overlay Extension for EL0

Browse source

Expose a HWCAP and ID_AA64MMFR3_EL1_S1POE to userspace, so they can be used to
check if the CPU supports the feature.

Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20240822151113.1479789-12-joey.gouly@arm.com
Signed-off-by: Will Deacon <will@kernel.org>

...

This commit is contained in:

Joey Gouly 2024-08-22 16:10:54 +01:00 • committed by Will Deacon

parent 9f82f15ddf

commit bf83dae90f

5 changed files with 19 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

Documentation/arch/arm64/elf_hwcaps.rst

View file

1

arch/arm64/include/asm/hwcap.h

View file

1

arch/arm64/include/uapi/asm/hwcap.h

View file

14

arch/arm64/kernel/cpufeature.c

View file

1

arch/arm64/kernel/cpuinfo.c

View file