vmm(4)/vmd(8) gain support for multi-processor VMs

Mike Larkin (mlarkin@) committed support for multi-processor virtual machines (i.e. guests):

CVSROOT:	/cvs
Module name:	src
Changes by:	mlarkin@cvs.openbsd.org	2026/09/17 20:35:55

Modified files:
	sys/arch/amd64/amd64: vmm_machdep.c 
	sys/arch/amd64/include: vmmvar.h 
	sys/dev/vmm    : vmm.c 
	usr.sbin/vmctl : main.c vmctl.8 vmctl.c vmctl.h 
	usr.sbin/vmd   : arm64_vm.c fw_cfg.c lapic.c lapic.h parse.y 
	                 vm.c vm.conf.5 vmd.c vmd.h x86_vm.c 

Log message:
vmm(4)/vmd(8): mp plumbing

Implements the sipi/init lapic state machine, mp IPI support and various
other changes required for mp. vmctl and man page changes for new start
and vm.conf options.

tested by dv and me on various guests

ok dv

This represents a huge jump forward in vmm(4)/vmd(8) flexibility and usability.