Michael Ellerman [off-list ref] writes:

On Fri, 2015-10-16 at 12:20 +1100, Stewart Smith wrote:

quoted

Back in 9678cda when we started using the Micro Partition Prefetch Engine
in POWER8 for KVM, there were two mistakes introduced from the original
patch used for investigation and microbenchmarks.

One mistake was that the opcode was constructed incorrectly, putting
the register in the wrong field in the opcode, meaning that we were
asking the chip to read the memory address from some other register than
what we intended - probably r0.

Where is the logmpp instruction documented?

BookIV Section 5.1 - although I think this is now meant to all be in the
"P8 User Manual".