From: Russell King rmk+kernel@armlinux.org.uk
Commit c58d237d0852a57fde9bc2c310972e8f4e3d155d upstream.
Add a Kconfig symbol for CPUs which are vulnerable to the Spectre attacks.
Signed-off-by: Russell King rmk+kernel@armlinux.org.uk Reviewed-by: Florian Fainelli f.fainelli@gmail.com Boot-tested-by: Tony Lindgren tony@atomide.com Reviewed-by: Tony Lindgren tony@atomide.com Acked-by: Marc Zyngier marc.zyngier@arm.com Signed-off-by: David A. Long dave.long@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Ard Biesheuvel ardb@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm/mm/Kconfig | 4 ++++ 1 file changed, 4 insertions(+)
--- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -396,6 +396,7 @@ config CPU_V7 select CPU_CP15_MPU if !MMU select CPU_HAS_ASID if MMU select CPU_PABRT_V7 + select CPU_SPECTRE if MMU select CPU_TLB_V7 if MMU
# ARMv7M @@ -793,6 +794,9 @@ config CPU_BPREDICT_DISABLE help Say Y here to disable branch prediction. If unsure, say N.
+config CPU_SPECTRE + bool + config TLS_REG_EMUL bool select NEED_KUSER_HELPERS