On Tue, Jul 31, 2018 at 04:43:22PM -0700, Mike Larkin wrote: > On Tue, Jul 31, 2018 at 04:59:54PM -0300, Elias M. Mariani wrote: > > And segmentation fault after applying the patches on OPENBSD_63. > > Maybe is just a coincidence, according to the data: > > HOST: ubuntu > > QEMU: Running OPENBSD_63 + patches > > (was working OK until patched). > > > > Cheers. > > Elias. > > > > 2018-07-31 16:36 GMT-03:00 Elias M. Mariani <[email protected]>: > > > Trying to boot in QEMU from snapshots/amd64/cd63.iso or from > > > snapshots/amd64/bsd.rd from the current disk: > > > The booting starts but the machine gets rebooted almost immediately. > > > > > > I'm reporting this pretty bad. But is because I'm using 6.3 in that > > > cloud server and just wanted to test if the snapshot was booting > > > correctly. QEMU is running in godsknowswhat. > > > I have never used QEMU myself, could someone try to reproduce ? > > > using cd63.iso from OPENBSD_63 gives no problems. > > > > > > Cheers. > > > Elias. > > > This may be related to the recent speculation/lfence fix that went in > a week or so ago. It reads an MSR that should be present on that CPU (and > if it isn't, we won't read it). > > I have one of those same Opterons here, I'll update it to -current and see > if I can repro this on real hardware. My guess is that kvm is failing the > RDMSR because the knowledge of it post-dates the time that kvm was built. > > -ml >
PS, "show registers" at ddb> prompt would confirm that is indeed this fix, if you could do that and report the output it would be appreciated.
