X2APIC support

[Slawa Olhovchenkov]

On Sat, Dec 12, 2015 at 03:35:13PM +0200, Konstantin Belousov wrote:

> On Sat, Dec 12, 2015 at 04:06:15PM +0300, Slawa Olhovchenkov wrote:
> > Does STABLE support X2APIC?
> > I see X2APIC related commits in CURRENT, what is status for STABLE?
> > I am try to enable X2APIC support on X10DRi and see kernel trap on
> > boot.
> 
> x2APIC is only supported in HEAD.  The code to parse processor x2APIC
> structures in MADT was committed, but AFAIK never tested on real hardware.
> 
> There are no plans to merge this to stable/10.

I am try now on real hardware and got kernel fault at boot when set in
BIOS X2APIC_OPT_OUT Flag to [Enable].
https://s9.postimg.org/6mt8bu21b/fault2.jpg

0xffffffff80537e74 is /usr/src/sys/kern/subr_smp.c:959

Boot success if X2APIC_OPT_OUT Flag set to [Disable]
Supermicro X10DRi, dual E5-2650v4

PS: addr2line don't support debug symbol location at /usr/lib/debug