[PATCH RESEND v7 3/6] arm64: Kconfig: add LSUI Kconfig

Yeoreum Yun
2025-08-16T15:19:42Z

Since Armv9.6, FEAT_LSUI supplies the load/store instructions for
previleged level to access to access user memory without clearing
PSTATE.PAN bit.
It's enough to add CONFIG_AS_HAS_LSUI only because the code for LSUI uses
individual `.arch_extension` entries.

Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
---
arch/arm64/Kconfig | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index e9bbfacc35a6..c474de3dce02 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -2239,6 +2239,11 @@ config ARM64_GCS

endmenu # "v9.4 architectural features"

+config AS_HAS_LSUI
+ def_bool $(as-instr,.arch_extension lsui)
+ help
+ Supported by LLVM 20 and later, not yet supported by GNU AS.
+
config ARM64_SVE
bool "ARM Scalable Vector Extension support"
default y
--
LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}