Define CONFIG_SPF for BOOK3S_64 and SMP. This enables the Speculative Page
Fault handler.

Support is only provide for BOOK3S_64 currently because:
- require CONFIG_PPC_STD_MMU because checks done in
  set_access_flags_filter()
- require BOOK3S because we can't support for book3e_hugetlb_preload()
  called by update_mmu_cache()

Signed-off-by: Laurent Dufour <redacted>
---
 arch/powerpc/Kconfig | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 809c468edab1..661ba5bcf60e 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig

@@ -1207,6 +1207,10 @@ endif
 config	ARCH_RANDOM
 	def_bool n
 
+config SPF
+	def_bool y
+	depends on PPC_BOOK3S_64 && SMP
+
 source "net/Kconfig"
 
 source "drivers/Kconfig"

-- 
2.7.4

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