From 87be3e2d31c01d3858bff43ab663769db03aab17 Mon Sep 17 00:00:00 2001
From: Christophe Leroy <christophe.leroy@c-s.fr>
Date: Wed, 12 Jul 2017 12:08:53 +0200
Subject: [PATCH] powerpc/8xx: Do not allow Pinned TLBs with STRICT_KERNEL_RWX
 or DEBUG_PAGEALLOC

Pinning TLBs bypasses STRICT_KERNEL_RWX or DEBUG_PAGEALLOC protections
so it should only be allowed when those are not selected

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
 arch/powerpc/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index a4c575c95937..a2b669729440 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -1176,7 +1176,8 @@ config CONSISTENT_SIZE
 
 config PIN_TLB
 	bool "Pinned Kernel TLBs (860 ONLY)"
-	depends on ADVANCED_OPTIONS && PPC_8xx
+	depends on ADVANCED_OPTIONS && PPC_8xx && \
+		   !DEBUG_PAGEALLOC && !STRICT_KERNEL_RWX
 
 config PIN_TLB_DATA
 	bool "Pinned TLB for DATA"
-- 
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