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-rw-r--r--arch/arm/mm/Kconfig21
1 files changed, 10 insertions, 11 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 07646d25e265..48bac7da8c70 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -412,21 +412,20 @@ config CPU_BPREDICT_DISABLE
412 412
413config TLS_REG_EMUL 413config TLS_REG_EMUL
414 bool 414 bool
415 default y if (SMP || CPU_32v6) && (CPU_32v5 || CPU_32v4 || CPU_32v3) 415 default y if SMP && (CPU_32v5 || CPU_32v4 || CPU_32v3)
416 help 416 help
417 We might be running on an ARMv6+ processor which should have the TLS 417 An SMP system using a pre-ARMv6 processor (there are apparently
418 register but for some reason we can't use it, or maybe an SMP system 418 a few prototypes like that in existence) and therefore access to
419 using a pre-ARMv6 processor (there are apparently a few prototypes 419 that required register must be emulated.
420 like that in existence) and therefore access to that register must
421 be emulated.
422 420
423config HAS_TLS_REG 421config HAS_TLS_REG
424 bool 422 bool
425 depends on CPU_32v6 423 depends on !TLS_REG_EMUL
426 default y if !TLS_REG_EMUL 424 default y if SMP || CPU_32v7
427 help 425 help
428 This selects support for the CP15 thread register. 426 This selects support for the CP15 thread register.
429 It is defined to be available on ARMv6 or later. If a particular 427 It is defined to be available on some ARMv6 processors (including
430 ARMv6 or later CPU doesn't support it then it must include "select 428 all SMP capable ARMv6's) or later processors. User space may
431 TLS_REG_EMUL" along with its other characteristics. 429 assume directly accessing that register and always obtain the
430 expected value only on ARMv7 and above.
432 431