fadump: a question about "ibm,configure-kernel-dump"

I have an ibm-p8-garrison machine. But I can not find a node
"ibm,configure-kernel-dump" under /proc/device-tree.  Does garrison
machine support fadump? And normally, which component in open-power
presents the "ibm,configure-kernel-dump" ?  I had though it was in
skiboot gitree or  garrison-xml gitree, but found nothing.

Can anyone give a help?
Thx