On Friday, 14 October 2016 15:48:47 CEST Mark Kettenis wrote: > > Date: Fri, 14 Oct 2016 16:49:31 +0900 (JST) > > From: YASUOKA Masahiko <yasu...@openbsd.org> > > > > Hi, > > > > I'm working on NEC Express5800/R110h-1 (dmesg is attached). On this > > machine, our kernel panics with following message. > > > > cpu0 at mainbus0panic: cpu at apic id 0 already attached? > > > > This seems to happen since x2APIC on the machine is enabled by BIOS > > and the kernel doesn't assume that. The diff makes the kernel use > > x2APIC if it is enabled by BIOS. > > > > ok? > > is the APICBASE msr available on all amd64 machines? If not, it will > need to be protected with a CPUID check.
Yes. I have looked that up before, for its use in the suspend/resume code. Stefan
