[PATCH 12/15] powerpc/book3e: Use way 3 for linear mapping bolted entry

[Michael Ellerman]

From: Benjamin Herrenschmidt <benh at kernel.crashing.org>

An erratum on A2 can lead to the bolted entry we insert for the linear
mapping being evicted, to avoid that write the bolted entry to way 3.

Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Signed-off-by: Michael Ellerman <michael at ellerman.id.au>
---
 arch/powerpc/kernel/exceptions-64e.S |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index 5c43063..e6c0926 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -864,8 +864,9 @@ have_hes:
 	 * that will have to be made dependent on whether we are running under
 	 * a hypervisor I suppose.
 	 */
-	ori	r3,r3,MAS0_HES | MAS0_WQ_ALLWAYS
-	mtspr	SPRN_MAS0,r3
+	ori	r11,r3,MAS0_WQ_ALLWAYS
+	oris	r11,r11,MAS0_ESEL(3)@h /* Use way 3: workaround A2 erratum 376 */
+	mtspr	SPRN_MAS0,r11
 	lis	r3,(MAS1_VALID | MAS1_IPROT)@h
 	ori	r3,r3,BOOK3E_PAGESZ_1GB << MAS1_TSIZE_SHIFT
 	mtspr	SPRN_MAS1,r3
-- 
1.7.1