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-rw-r--r--arch/arm/mm/Kconfig14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 5b670c9ac5e..007766a0644 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -409,3 +409,17 @@ config CPU_BPREDICT_DISABLE
depends on CPU_ARM1020
help
Say Y here to disable branch prediction. If unsure, say N.
+
+config HAS_TLS_REG
+ bool
+ depends on CPU_32v6 && !CPU_32v5 && !CPU_32v4 && !CPU_32v3
+ help
+ This selects support for the CP15 thread register.
+ It is defined to be available on ARMv6 or later. However
+ if the kernel is configured to support multiple CPUs including
+ a pre-ARMv6 processors, or if a given ARMv6 processor doesn't
+ implement the thread register for some reason, then access to
+ this register from user space must be trapped and emulated.
+ If user space is relying on the __kuser_get_tls code then
+ there should not be any impact.
+