[PATCH 3/6] 8xx: invalidate non present TLBs

From: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	"linuxppc-dev@ozlabs.org" <linuxppc-dev@ozlabs.org>,
	Rex Feany <RFeany@mrv.com>, Scott Wood <scottwood@freescale.com>
Subject: [PATCH 3/6] 8xx: invalidate non present TLBs
Date: Thu, 8 Oct 2009 15:24:55 +0200	[thread overview]
Message-ID: <1255008298-19949-4-git-send-email-Joakim.Tjernlund@transmode.se> (raw)
In-Reply-To: <1255008298-19949-3-git-send-email-Joakim.Tjernlund@transmode.se>

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.
---
 arch/powerpc/mm/fault.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 7699394..72941c7 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -39,7 +39,7 @@
 #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)
@@ -243,6 +243,12 @@ 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);
+
         /* The MPC8xx seems to always set 0x80000000, which is
          * "undefined".  Of those that can be set, this is the only
          * one which seems bad.
-- 
1.6.4.4
