[Skiboot] [PATCH skiboot v3] npu2: Add XTS_BDF_MAP wildcard refcount

[Stewart Smith]

Stewart Smith <stewart at linux.ibm.com> writes:
> Alexey Kardashevskiy <aik at ozlabs.ru> writes:
>> On 05/12/2018 03:17, Reza Arbab wrote:
>>> On Tue, Dec 04, 2018 at 03:41:55PM +1100, Alexey Kardashevskiy wrote:
>>>> Currently PID wildcard is programmed into the NPU once and never cleared
>>>> up. This works for the bare metal as MSR does not change while the host
>>>> OS is running.
>>>>
>>>> However with the device virtualization, we need to keep track of wildcard
>>>> entries use and clear them up before switching a GPU from a host to
>>>> a guest or vice versa.
>>>>
>>>> This adds refcount to a NPU2, one counter per wildcard entry. The index
>>>> is a short lparid (4 bits long) which is allocated in opal_npu_map_lpar()
>>>> and should be smaller than NPU2_XTS_BDF_MAP_SIZE (defined as 16).
>>> 
>>> Acked-by: Reza Arbab <arbab at linux.ibm.com>
>>> 
>>
>>
>> Stewart, Alistair, ping, anyone? https://patchwork.ozlabs.org/patch/1007446/
>
> Okay, so I'm all behind on merging patches. With Reza's ack it looks
> good to me. Will try to run through tests to merge now.

and in an update, merged to master as of
ba1d95a1d460e0241d21561194c4cd06e518f329.

I don't currently have a great way to test any of the npu2 code, so
hopefully it all works together okay (Andrew/Frederic please check too).

-- 
Stewart Smith
OPAL Architect, IBM.