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Date: Wed, 03 Jun 2015 10:17:13 -0700
From: Peter Grehan <grehan@freebsd.org>
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To: Stefan Andritoiu <stefan.andritoiu@gmail.com>
CC: freebsd-virtualization@freebsd.org
Subject: Re: Where are the VCPU threads created?
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Hi Stefan,

> I see that in the main() function of bhyverun.c it adds CPU0 by
> calling fbsdrun_addcpu(ctx, 0, 0, rip). But I can't find where the
> other VCPUs are added. Or if the 'guest_ncpus' variable is ever used
> (except for error checks)

  Have a look at bhyve/spinup_ap.c:spinup_ap() which is called when a 
the vmm kernel module detects a SIPI message being sent to the local 
APIC and forces a vm-exit to userspace.

later,

Peter.