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Commit 5efab4a0 authored by Joakim Tjernlund's avatar Joakim Tjernlund Committed by Benjamin Herrenschmidt
Browse files

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: default avatarJoakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 0285ae37

arch/powerpc/mm/fault.c

+7 −1
Original line number Diff line number Diff line
@@ -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 @@ int __kprobes do_page_fault(struct pt_regs *regs, unsigned long address, 
		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.