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
Loading
Loading
Loading
Loading
+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