[Bug 259939] [boot] BTX halted on boot mfsbsd 13.0-STABLE over iPXE

From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 20 Nov 2021 02:38:25 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=259939

            Bug ID: 259939
           Summary: [boot] BTX halted on boot mfsbsd 13.0-STABLE over iPXE
           Product: Base System
           Version: 13.0-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: terehovv@mail.ru

Created attachment 229599
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=229599&action=edit
pciconf -lv

I am trying to load mfsbsd version 13.0-STABLE amd64 via iPXE (chainloading
using undionly.kpxe) on Intel D525MWV motherboard and get BTX halted error:

int=00000006  err=00000000  efl=00010202  eip=0000a000
eax=0007ca14  abx=00000000  ecx=00000802  edx=000000e0
esi=0000004c  edi=00004200  ebp=00000000  esp=0007ca08
cs=002b  ds=0033  es=0033    fs=0033  gs=0033  ss=0033
cs:eip=ff ff 89 74 24 10 8b 94-24 98 00 00 00 89 bc 24
       b0 00 00 00 89 d1 89 94-24 ac 00 00 00 8d 34 3a
ss:esp=d4 c9 07 00 38 93 02 00-b2 05 01 00 44 ea 07 00
       46 91 02 00 00 00 00 00-08 00 00 00 78 46 07 00
BTX halted

Settings in BIOS:
UEFI Boot: Disable
Boot to Network: Enable PXE

All previous versions of FreeBSD are loaded without problems (including
12.3-RC2).

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