[PATCH 4.14 089/109] ARM: spectre: add Kconfig symbol for CPUs vulnerable to Spectre

Greg Kroah-Hartman
2018-10-16T17:21:10Z

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>
---
arch/arm/mm/Kconfig | 4 ++++
1 file changed, 4 insertions(+)

--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -415,6 +415,7 @@ 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_THUMB_CAPABLE
select CPU_TLB_V7 if MMU

@@ -826,6 +827,9 @@ 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