On 30/11/16 11:35, Benjamin Herrenschmidt wrote:

On Wed, 2016-11-30 at 11:14 +1100, Balbir Singh wrote:

quoted

quoted

+#define _RPAGE_RSV1          0x1000000000000000UL
+#define _RPAGE_RSV2          0x0800000000000000UL
+#define _RPAGE_RSV3          0x0400000000000000UL
+#define _RPAGE_RSV4          0x0200000000000000UL
+

We use the top 4 bits and not the _SW bits?

Correct, welcome to the discussion we've been having the last 2 weeks
:-)

I thought we were following Paul's suggestion here

https://lists.ozlabs.org/pipermail/linuxppc-dev/2016-November/151620.html
and I also noticed
https://lists.ozlabs.org/pipermail/linuxppc-dev/2016-November/151624.html

My bad, I thought we had two SW bits to use for DD1

Balbir Singh.