[PATCH v2 1/2] arch/Kconfig: Make CONFIG_CPU_SPECTRE available for all architectures

[Pawan Gupta]

Borrow CONFIG_CPU_SPECTRE from ARM to be available for all
architectures. This will help in configuration of features that depend
on CPU being affected by spectre class of vulnerabilities.

Signed-off-by: Pawan Gupta <pawan.kumar.gupta@xxxxxxxxxxxxxxx>
---
 arch/Kconfig        | 3 +++
 arch/arm/mm/Kconfig | 3 ---
 arch/x86/Kconfig    | 1 +
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/Kconfig b/arch/Kconfig
index 8df1c7102643..6aa856d51cb7 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -1091,6 +1091,9 @@ config ARCH_SUPPORTS_RT
 config CPU_NO_EFFICIENT_FFS
 	def_bool n
 
+config CPU_SPECTRE
+	bool
+
 config HAVE_ARCH_VMAP_STACK
 	def_bool n
 	help
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 8355c3895894..44551465fd03 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -828,9 +828,6 @@ config CPU_BPREDICT_DISABLE
 	help
 	  Say Y here to disable branch prediction.  If unsure, say N.
 
-config CPU_SPECTRE
-	bool
-
 config HARDEN_BRANCH_PREDICTOR
 	bool "Harden the branch predictor against aliasing attacks" if EXPERT
 	depends on CPU_SPECTRE
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d9830e7e1060..769739da67c6 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -124,6 +124,7 @@ config X86
 	select CLKEVT_I8253
 	select CLOCKSOURCE_VALIDATE_LAST_CYCLE
 	select CLOCKSOURCE_WATCHDOG
+	select CPU_SPECTRE
 	select DCACHE_WORD_ACCESS
 	select EDAC_ATOMIC_SCRUB
 	select EDAC_SUPPORT
-- 
2.31.1