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arm64: Kconfig: Add support for LSUI

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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: Yeoreum Yun <yeoreum.yun@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Yeoreum Yun
2026-03-14 17:51:33 +00:00
committed by Catalin Marinas
parent 16dbe77a5b
commit 377609ae8b
1 changed files with 20 additions and 0 deletions
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arch/arm64/Kconfig
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@@ -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