Re: debian bootup hangs on qemu-system-mips64el
Jiaxun Yang <[email protected]>
| Newsgroups | gmane.linux.ports.mips,gmane.comp.emulators.qemu.user,gmane.linux.debian.ports.mips |
|---|---|
| Message-ID | <[email protected]> |
于 2020年1月13日 GMT+08:00 上午3:34:18, Jun Sun <[email protected]> 写到: >Are you sure QEMU/MIPS does not support SMP? Below link written in >2016 clearly shows something was working then. > >https://www.mips.com/blog/how-to-run-smp-linux-in-qemu-on-a-mips64-release-6-cpu/ > >Also, as Lixing mentioned in our private exchange, there is SMP >support for loongson. Lixing, I assume loongson SMP support is >already merged in QEMU repo, right? Can you point out the relevant >source code directories? Hi Jun, As far as I known, Loongson is using there own SMP IPI implementation instead of MIPS MT One. There QEMU implementation could be found here [1]. QEMU have implemented MIPS MT ASE for SMP. Thanks > >Would love to get more pointers here! Thanks! > >Jun > >On Thu, Jan 9, 2020 at 1:24 PM Aurelien Jarno <[email protected]> >wrote: >> >> On 2020-01-04 20:46, Jun Sun wrote: >> > On Wed, Jan 1, 2020 at 6:50 PM Jun Sun <[email protected]> wrote: >> > > >> > > Hi, all, >> > > >> > > Debian/mips64el runs well on qemu-system-mips64el until I turned >on smp option with a number of 2 or higher. See the error message >below. It usually hangs pretty early on. >> > > >> >> QEMU/mips doesn't really support SMP. The -smp option used to be for >> SMT, but I am not even sure it really worked. >> >> All that said, it's still a bug in QEMU to accept this option. >> >> -- >> Aurelien Jarno GPG: 4096R/1DDD8C9B >> [email protected] http://www.aurel32.net [1]: https://gitee.com/loongsonlab/qemu -- Jiaxun Yang