linux-kernel - [PATCH 06/11] powerpc/32: move LOAD_MSR_KERNEL() into head

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Date:   Mon, 28 Jan 2019 11:11:23 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH 06/11] powerpc/32: move LOAD_MSR_KERNEL() into head_32.h and
 use it

As preparation for using head_32.h for head_40x.S, move
LOAD_MSR_KERNEL() there and use it to load r10 with MSR_KERNEL value.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/kernel/entry_32.S |  9 +--------
 arch/powerpc/kernel/head_32.h  | 11 ++++++++++-
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 3f83e71ae43f..24d93231665b 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -37,14 +37,7 @@
 #include <asm/feature-fixups.h>
 #include <asm/barrier.h>
 
-/*
- * MSR_KERNEL is > 0x10000 on 4xx/Book-E since it include MSR_CE.
- */
-#if MSR_KERNEL >= 0x10000
-#define LOAD_MSR_KERNEL(r, x)	lis r,(x)@h; ori r,r,(x)@l
-#else
-#define LOAD_MSR_KERNEL(r, x)	li r,(x)
-#endif
+#include "head_32.h"
 
 /*
  * Align to 4k in order to ensure that all functions modyfing srr0/srr1
diff --git a/arch/powerpc/kernel/head_32.h b/arch/powerpc/kernel/head_32.h
index f77f13142410..e302afd40d0a 100644
--- a/arch/powerpc/kernel/head_32.h
+++ b/arch/powerpc/kernel/head_32.h
@@ -13,6 +13,15 @@
 #endif
 
 /*
+ * MSR_KERNEL is > 0x10000 on 4xx/Book-E since it include MSR_CE.
+ */
+#if MSR_KERNEL >= 0x10000
+#define LOAD_MSR_KERNEL(r, x)	lis r,(x)@h; ori r,r,(x)@l
+#else
+#define LOAD_MSR_KERNEL(r, x)	li r,(x)
+#endif
+
+/*
  * Exception entry code.  This code runs with address translation
  * turned off, i.e. using physical addresses.
  * We assume sprg3 has the physical address of the current
@@ -86,7 +95,7 @@
 #define EXC_XFER_TEMPLATE(n, hdlr, trap, copyee, tfer, ret)	\
 	li	r10,trap;					\
 	stw	r10,_TRAP(r11);					\
-	li	r10,MSR_KERNEL;					\
+	LOAD_MSR_KERNEL(r10, MSR_KERNEL);			\
 	copyee(r10, r9);					\
 	bl	tfer;						\
 i##n:								\
-- 
2.13.3