On Thu, Nov 6, 2014 at 6:36 PM, Damien Hilloulin <damien.hillou...@epfl.ch> wrote: > Le 06/11/2014 16:27, Artyom Tarasenko a écrit : >> >> Hello Damien, >> >> On Thu, Nov 6, 2014 at 8:38 AM, Damien Hilloulin >> <damien.hillou...@epfl.ch> wrote: >>> >>> Hello everyone, >>> >>> I'm a newcomer in QEMU and my goal would be to port an existing system >>> simulator using another emulator to QEMU. >>> Some work has already been done, and Sparc has been the main target so >>> far >>> because of its simplicity (and because we have a very good support for >>> Sparc >>> with the other emulator). >>> QEMU is great, open-source (contrary to the other emulator we have been >>> using in the past), and that's why we are aiming at using it. >>> >>> However, it seems that the Sparc targets doesn't really support SMP/CMT >>> as >>> of now. So I am considering two possibilities: >>> - adding SMP support in QEMU for the Sparc targets (and contribute it to >>> QEMU :) ) >> >> Do you mean a) emulating multiple guest cores on in a single host >> thread, or b) emulating multiple guest cores in multiple host threads? > > a) Would be enough for us (but b) would be amazing) ! >> >> The former (a) should be relative easy for a sun4m platform: just have >> to put the CPUs at the proper place in the system bus and fill the CPU >> Module Ids (MIDs) with the proper data. > > Could you please explain it with some more details? I don't really know how > to do that (yet)... > We are really interested in such a support for Sparc64, so I think that it > would be for sun4u machines only. > Would the changes would be the same or would there be more work?
Taking into account the overall status of sun4u emulation, it is a bit more work. AFAIR the SMP-related registers of Ultrasparc CPUs/chipsets are not implemented. Additionally there are currently no sun4u SMP boards emulated in QEMU, but I think this is a smaller issue. Also some support in OpenBIOS might be necessary. Mark can surely tell more. Artyom -- Regards, Artyom Tarasenko SPARC and PPC PReP under qemu blog: http://tyom.blogspot.com/search/label/qemu
