On 17/08/18 13:34, Jonathan Gray wrote: > On Fri, Aug 17, 2018 at 12:15:10PM +0100, Mark Cave-Ayland wrote: >> Hi all, >> >> I was just wondering what is the current state of the openbsd/macppc >> port? As part of my recent work on qemu-system-ppc I now have a patch >> that can boot OpenBSD macppc under the New World (-M mac99,via=pmu) >> machine but I'm seeing quite a bit of instability in OpenBSD compared to >> all my other test OSs. >> >> For those that are interested I have included screenshots below: >> >> OpenBSD 6.3 >> - Hangs just after USB detection >> - https://www.ilande.co.uk/tmp/qemu/openbsd-6.3.png >> >> OpenBSD 6.2 >> - Panics just after USB detection >> - https://www.ilande.co.uk/tmp/qemu/openbsd-6.2.png >> >> OpenBSD 6.1 >> - Boots all the way to the installer but causes qemu-system-ppc to >> terminate fairly easily after pressing a few keys with "qemu: fatal: >> ERROR: instruction should not need address translation" >> - https://www.ilande.co.uk/tmp/qemu/openbsd-6.1.png >> >> Note I also get a constant stream of messages on the console related to >> OpenPIC: >> >> qemu-system-ppc: openpic_iack: bad raised IRQ 47 ctpr 8 ivpr 0x4047002f >> qemu-system-ppc: openpic_iack: bad raised IRQ 47 ctpr 8 ivpr 0x4047002f >> qemu-system-ppc: openpic_iack: bad raised IRQ 47 ctpr 8 ivpr 0x4047002f >> qemu-system-ppc: openpic_iack: bad raised IRQ 47 ctpr 8 ivpr 0x4047002f >> qemu-system-ppc: openpic_iack: bad raised IRQ 28 ctpr 8 ivpr 0x4045001c >> qemu-system-ppc: openpic_iack: bad raised IRQ 28 ctpr 8 ivpr 0x4045001c >> qemu-system-ppc: openpic_iack: bad raised IRQ 28 ctpr 8 ivpr 0x4045001c >> etc. >> >> >> Obviously I can't categorically state that QEMU's emulation is perfect, >> but it can now reliably run all of Linux, MacOS, NetBSD and FreeBSD in >> my local tests which makes me suspect that OpenBSD is trying to do >> something different here. > > Builds are done natively on real hardware (xserves). Your work on > qemu-system-ppc would be improved by being able to compare to a real > machine while it is still possible to find some that work. You could > search bugs@ but I don't believe any of those problems have been reported > running on actual macppc machines.
Thanks for information. I guess there is a difference between being able to build and run the guest OS - for example do the builds get regularly tested on any Sawtooth-type PowerMac3,1 machines (which is effectively what QEMU is trying to emulate)? FWIW from the screenshots above the "bad IRQs" being complained about above can be show to be macgpio1 (IRQ 47) and ohci0 (IRQ 28). Is there anything special about these interrupts at all, e.g. edge vs. level triggering? ATB, Mark.
