[Skiboot] [PATCH] npu2/hw-procedures: Fence bricks via NTL instead of MISC

Reza Arbab arbab at linux.ibm.com
Thu Jul 12 02:11:23 AEST 2018

On Wed, Jul 11, 2018 at 01:56:10PM +1000, Andrew Donnellan wrote:
>Hmm, I wonder whether there's any side effects from how we use 
>NPU2_MISC_FENCE_STATE in the opencapi code... anything we should be 
>aware of?

I can't tell if the opencapi code is similar enough to run into the root 
problem which motivated the change.

Would it be possible for every brick to be fenced at once, say if you 
did FLR on every device simultaneously? Even if so, I don't know if that 
would then defeat ATS as it does in the NVLink case. 

Reza Arbab

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