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| author | Yeoreum Yun <yeoreum.yun@arm.com> | 2026-03-14 20:51:33 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2026-03-27 15:52:45 +0300 |
| commit | 377609ae8b6ac2ef522c9dcecfa20a7123116dbf (patch) | |
| tree | c84ef8b5d063890808474e7c7f889f3c31e39113 | |
| parent | 16dbe77a5be2defe5797cc33da87e33f72ef150c (diff) | |
| download | linux-377609ae8b6ac2ef522c9dcecfa20a7123116dbf.tar.xz | |
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: Yeoreum Yun <yeoreum.yun@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| -rw-r--r-- | arch/arm64/Kconfig | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 38dba5f7e4d2..890a1bedbf4a 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -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 |