Re: [PATCH 7/7] ocxl: Document new OCXL IOCTLs

[Andrew Donnellan]

On 17/04/18 12:09, Alastair D'Silva wrote:

From: Alastair D'Silva 

Signed-off-by: Alastair D'Silva 
---
  Documentation/accelerators/ocxl.rst | 10 ++
  1 file changed, 10 insertions(+)

diff --git a/Documentation/accelerators/ocxl.rst 
b/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.
  
+OCXL_IOCTL_ENABLE_P9_WAIT:

+
+  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.


+
+OCXL_IOCTL_GET_PLATFORM:
+
+  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

[PATCH 7/7] ocxl: Document new OCXL IOCTLs

[Alastair D'Silva]

From: Alastair D'Silva 

Signed-off-by: Alastair D'Silva 
---
 Documentation/accelerators/ocxl.rst | 10 ++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/accelerators/ocxl.rst 
b/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.
 
+OCXL_IOCTL_ENABLE_P9_WAIT:
+
+  Allows the AFU to wake a userspace thread executing 'wait'. Returns
+  information to userspace to allow it to configure the AFU.
+
+OCXL_IOCTL_GET_PLATFORM:
+
+  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.
 
 mmap
 
-- 
2.14.3