On Wed, Aug 07, 2019 at 10:15:48AM +0200, Cédric Le Goater wrote: > On 07/08/2019 09:14, Balamuruhan S wrote: > > Hi All, > > > > This is a proposal to extend mmio callbacks in Qemu with scripting interface > > that is prototyped with python in this implementation. It gives ability to > > feed runtime data through callbacks without recompiling Qemu in generic way. > > This patchset adds library that provides APIs for Qemu to talk with python > > scripts placed in path -module-path and how existing xscom can be extended > > with python interface infrastructure. > > > > We have also added an hacky emulation for memory region (OCC common area > > and HOMER) > > which is shared between core and un-core engine (ideally this should be via > > sram device) to showcase the effectiveness of having the scripting interface > > (uncore engine taken for discussion here is powerpc specificed called OCC). > > We should try to merge this part first. It is useful as it is after some > cleanups. > > > Having scripting interface helps to emulate/test different uncore-core > > interactions including uncore engine failure or hang. It also helps in > > feeding > > randomized data at byte level access. This patchset is primarily to extend > > mmio > > callbacks with scripting interface and to demonstrate effectiveness it. > > It is already possible to feed device models with external data using QMP or > external agents using a chardev backend transport. What are the benefits > of using the embedded python approach ?
Yeah, I also think this needs better justification.
In particular what's the case that Python makes this significantly
easier than hacking up experimental interactions with C. I mean you
already have to understand POWER9 internals to work with this, right,
so I wouldn't expect Python's greater accessibility to be a big
concern here.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
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