[Skiboot] [PATCH] npu2: Disable fast reboot

Reza Arbab arbab at linux.vnet.ibm.com
Wed Mar 14 07:48:44 AEDT 2018

On Tue, Mar 13, 2018 at 01:51:52PM +1100, Alistair Popple wrote:
>Why/how do things break? This would effectively disable fast reboot on
>Witherspoon (and possibly other systems which merely have it present), but if it
>only causes problems after the driver has loaded we could wait until then before
>disabling fast reboot.

After a fast reboot, the links won't complete training. It seems 
independent of driver load, because I just verified this sequence:

1. Cold boot
2. Do not load driver
3. Fast reboot
4. Load driver
5. Sanity tests fail

During (4), the training doesn't explicitly fail, but I noticed that not 
all the hw procedures are executed--the last one run is 
phy_disable_tx_rxcal (not check_credits), and the GPU memory is not 

Reza Arbab

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