From: Benjamin Herrenschmidt <b...@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 <b...@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mich...@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
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