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authorJoakim Tjernlund <joakim.tjernlund@transmode.se>2009-11-20 03:21:02 +0300
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-12-09 09:10:35 +0300
commit5efab4a02c89c252fb4cce097aafde5f8208dbfe (patch)
tree52816daf92f813f8b53149ff2f177337d313e22d /arch/powerpc
parent0285ae37d4366b2d614df0c83cb413cf59ad8944 (diff)
downloadlinux-5efab4a02c89c252fb4cce097aafde5f8208dbfe.tar.xz
powerpc/8xx: Invalidate non present TLBs
8xx sometimes need to load a invalid/non-present TLBs in it DTLB asm handler. These must be invalidated separaly as linux mm don't. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/mm/fault.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index e7dae82c1285..26fb6b990b0a 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -40,7 +40,7 @@
#include <asm/uaccess.h>
#include <asm/tlbflush.h>
#include <asm/siginfo.h>
-
+#include <mm/mmu_decl.h>
#ifdef CONFIG_KPROBES
static inline int notify_page_fault(struct pt_regs *regs)
@@ -246,6 +246,12 @@ good_area:
goto bad_area;
#endif /* CONFIG_6xx */
#if defined(CONFIG_8xx)
+ /* 8xx sometimes need to load a invalid/non-present TLBs.
+ * These must be invalidated separately as linux mm don't.
+ */
+ if (error_code & 0x40000000) /* no translation? */
+ _tlbil_va(address, 0, 0, 0);
+
/* The MPC8xx seems to always set 0x80000000, which is
* "undefined". Of those that can be set, this is the only
* one which seems bad.