[OpenPOWER-HDL-Cores] https://bugzilla.kernel.org/show_bug.cgi?id=213257

Luke Kenneth Casson Leighton lkcl at lkcl.net
Fri May 28 11:51:35 UTC 2021


not sure where this might best else be sent.

Lauri has written a mini kvm runner for ppc64 with the intention to
allow single-step execution where a memory dump and full register dump
may be carried out after every single instruction.  it manages around
35k instructions per second this way.

this to be able to compare against hardware, qemu, simulators,
anything and everything, running benchmarks unit tests full programs
full virtualised OSes, anything.

unfortunately, all FP operations after single-step through the entire
program are zero contents.

we suspect that insufficient context / state is saved/restored on the step.

is this a known issue or something that was overlooked?

l.


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