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From 85388aad8ca15fcc28f5d0989265217351bada19 Mon Sep 17 00:00:00 2001
From: Benjamin Walsh <benjamin.walsh@windriver.com>
Date: Mon, 9 Feb 2009 14:25:47 -0500
Subject: [PATCH] powerpc: kexec fix for powerpc64
slbia instruction invalidates the SLB, but there was a hang on the first
instruction that caused an SLB miss exception. Doing a full sync after
the slbia causes the SLB to be in a consistent state for the handling of
the SLB exception.
Signed-off by: Benjamin Walsh <benjamin.walsh@windriver.com>
---
arch/powerpc/mm/book3s64/slb.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/mm/book3s64/slb.c b/arch/powerpc/mm/book3s64/slb.c
index 515730e499fe..7a8b335003b6 100644
--- a/arch/powerpc/mm/book3s64/slb.c
+++ b/arch/powerpc/mm/book3s64/slb.c
@@ -331,6 +331,7 @@ void slb_initialize(void)
asm volatile("isync":::"memory");
asm volatile("slbmte %0,%0"::"r" (0) : "memory");
asm volatile("isync; slbia; isync":::"memory");
+ mb();
create_shadowed_slbe(PAGE_OFFSET, mmu_kernel_ssize, lflags, LINEAR_INDEX);
create_shadowed_slbe(VMALLOC_START, mmu_kernel_ssize, vflags, VMALLOC_INDEX);
--
2.1.0
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