Commit 377609ae authored by Yeoreum Yun's avatar Yeoreum Yun Committed by Catalin Marinas
Browse files

arm64: Kconfig: Add support for LSUI 



Since Armv9.6, FEAT_LSUI supplies the load/store instructions for
previleged level to access to access user memory without clearing
PSTATE.PAN bit.

Add Kconfig option entry for FEAT_LSUI.

Signed-off-by: default avatarYeoreum Yun <yeoreum.yun@arm.com>
Reviewed-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 16dbe77a

arch/arm64/Kconfig

+20 −0
Original line number Diff line number Diff line
@@ -2215,6 +2215,26 @@ config ARM64_GCS 


endmenu # "ARMv9.4 architectural features"



config AS_HAS_LSUI

	def_bool $(as-instr,.arch_extension lsui)

	help

	  Supported by LLVM 20+ and binutils 2.45+.



menu "ARMv9.6 architectural features"



config ARM64_LSUI

	bool "Support Unprivileged Load Store Instructions (LSUI)"

	default y

	depends on AS_HAS_LSUI && !CPU_BIG_ENDIAN

	help

	  The Unprivileged Load Store Instructions (LSUI) provides

	  variants load/store instructions that access user-space memory

	  from the kernel without clearing PSTATE.PAN bit.



	  This feature is supported by LLVM 20+ and binutils 2.45+.



endmenu # "ARMv9.6 architectural feature"



config ARM64_SVE

	bool "ARM Scalable Vector Extension support"

	default y