On 17/04/18 12:09, Alastair D'Silva wrote:
From: Alastair D'Silva <alast...@d-silva.org>

Signed-off-by: Alastair D'Silva <alast...@d-silva.org>
  Documentation/accelerators/ocxl.rst | 10 ++++++++++
  1 file changed, 10 insertions(+)

diff --git a/Documentation/accelerators/ocxl.rst 
index ddcc58d01cfb..144595a80a1c 100644
--- a/Documentation/accelerators/ocxl.rst
+++ b/Documentation/accelerators/ocxl.rst
@@ -157,6 +157,16 @@ OCXL_IOCTL_GET_METADATA:
    Obtains configuration information from the card, such at the size of
    MMIO areas, the AFU version, and the PASID for the current context.
+  Allows the AFU to wake a userspace thread executing 'wait'. Returns
+  information to userspace to allow it to configure the AFU.

Note that this is only available on POWER9.

+  Notifies userspace as to the platform the kernel believes we are on,
+  which may differ from what userspace believes. Also reports on which CPU
+  features which are usable from userspace.

The first sentence here doesn't seem to relate to anything that GET_PLATFORM actually does - afaict you're just passing flags which I suppose imply what the correct platform is, but really they're just feature flags?

Andrew Donnellan              OzLabs, ADL Canberra
andrew.donnel...@au1.ibm.com  IBM Australia Limited

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