linux-kernel - [PATCH 1/3] powerpc/8xx: mark _PAGE

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Message-Id: <c892c744ca721a773c3663ed1f0b2157a4f73aeb.1429696335.git.christophe.leroy@c-s.fr>
Date:	Wed, 22 Apr 2015 12:06:41 +0200 (CEST)
From:	Christophe Leroy <christophe.leroy@....fr>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>, scottwood@...escale.com
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	Joakim Tjernlund <joakim.tjernlund@...nsmode.se>
Subject: [PATCH 1/3] powerpc/8xx: mark _PAGE_SHARED all types of kernel pages

All kernel pages have to be marked as shared in order to not perform
CASID verification.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/include/asm/pte-8xx.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/pte-8xx.h b/arch/powerpc/include/asm/pte-8xx.h
index eb6edb4..c8aacad 100644
--- a/arch/powerpc/include/asm/pte-8xx.h
+++ b/arch/powerpc/include/asm/pte-8xx.h
@@ -63,7 +63,12 @@
 
 /* We need to add _PAGE_SHARED to kernel pages */
 #define _PAGE_KERNEL_RO	(_PAGE_SHARED | _PAGE_RO | _PAGE_KNLRO)
-#define _PAGE_KERNEL_ROX	(_PAGE_EXEC | _PAGE_RO | _PAGE_KNLRO)
+#define _PAGE_KERNEL_ROX	(_PAGE_SHARED | _PAGE_RO | _PAGE_KNLRO | \
+				 _PAGE_EXEC)
+#define _PAGE_KERNEL_RW		(_PAGE_SHARED | _PAGE_DIRTY | _PAGE_RW | \
+				 _PAGE_HWWRITE)
+#define _PAGE_KERNEL_RWX	(_PAGE_SHARED | _PAGE_DIRTY | _PAGE_RW | \
+				 _PAGE_HWWRITE | _PAGE_EXEC)
 
 #endif /* __KERNEL__ */
 #endif /*  _ASM_POWERPC_PTE_8xx_H */
-- 
2.1.0

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