arm64: Emulate SETEND for AArch32 tasks

[deliverable/linux.git] / arch / arm64 / Kconfig

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index b1f9a20a367746d7ed7436b82ae0e257335fd3d9..21a59bf37145e75dbcc851f60d0a4e2da0686a16 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -540,6 +540,21 @@ config CP15_BARRIER_EMULATION
 
          If unsure, say Y
 
+config SETEND_EMULATION
+       bool "Emulate SETEND instruction"
+       help
+         The SETEND instruction alters the data-endianness of the
+         AArch32 EL0, and is deprecated in ARMv8.
+
+         Say Y here to enable software emulation of the instruction
+         for AArch32 userspace code.
+
+         Note: All the cpus on the system must have mixed endian support at EL0
+         for this feature to be enabled. If a new CPU - which doesn't support mixed
+         endian - is hotplugged in after this feature has been enabled, there could
+         be unexpected results in the applications.
+
+         If unsure, say Y
 endif
 
 endmenu