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powerpc/8xx: Invalidate non present TLBs

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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>
This commit is contained in:
Joakim Tjernlund 2009-11-20 00:21:02 +00:00 committed by Benjamin Herrenschmidt
parent 0285ae37d4
commit 5efab4a02c
1 changed files with 7 additions and 1 deletions
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8
arch/powerpc/mm/fault.c
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@ -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.