Fiasco.OC won't boot on Aaeon FWS2360 ...

Hi,

in some experiments I'm trying to run Fiasco/L4re on a Aaeon FWS2360 
(https://www.aaeon.com/en/p/desktop-network-appliance-fws-2360) with an 
Intel Atom C3558. Unfortunately Fiasco gets stuck on boot when trying to 
start the different cores of the processor (I'm using the latest 
published l4re-snapshot-20.10.0). For this test I'm using the "hello 
world" ISO build with this command

     make E=hello grub2iso 
MODULE_SEARCH_PATH="${PWD}/../build-fiasco-amd64"

The ISO image boots fine on another amd64 system.  After adding some 
printf()'s to the file kernel_thread-ia32.cpp it looks to me that things 
get stuck with this call:

   // Send IPI-Sequency to startup the APs
   Apic::mp_startup(Cpu::boot_cpu(), Apic::APIC_IPI_OTHERS, tramp_page);

as it does not return anymore ... any hint how to debug this or drill 
down to get more information and the AtomC3558 system to boot?

Thanks

Andreas


L4 Bootstrapper
   Build: #2 Mon Dec 14 12:09:54 PST 2020, x86-64, 7.5.0
   RAM: 0000000000000000 - 00000000000997ff: 614kB
   RAM: 0000000000100000 - 000000003e2dffff: 1017728kB
   RAM: 000000003e300000 - 0000000078762fff: 954764kB
   RAM: 0000000078773000 - 000000007de44fff: 88904kB
   RAM: 000000007f34b000 - 000000007f7fffff: 4820kB
   RAM: 0000000100000000 - 000000087fffffff: 31457280kB
   Total RAM: 32738MB
   Scanning fiasco -serial_esc
   Scanning sigma0
   Scanning moe --init=rom/hello
   need 272 bytes to copy MBI
   reserved 272 bytes at 0x2000
   Moving up to 5 modules behind 1100000
   moving module 00 { 1021000-1246617 } -> { 119b000-13c0617 } [2250264]
   moving module 04 { 170000-19b95f } -> { 116f000-119a95f } [178528]
   moving module 03 { 152000-16f72f } -> { 1151000-116e72f } [120624]
   moving module 02 { 10e000-15175f } -> { 110d000-115075f } [276320]
   moving module 01 { 101000-10d48f } -> { 1100000-110c48f } [50320]
   Loading fiasco
   Loading sigma0
   Loading moe
   find kernel info page...
   found kernel info page (via ELF) at 400000
Regions of list 'regions'
     [        0,       fff] {     1000} Arch   BIOS
     [     1000,      1fff] {     1000} Kern   fiasco
     [     2000,      210f] {      110} Root   mbi_rt
     [    99800,     9ffff] {     6800} Arch   BIOS
     [    e0000,     fffff] {    20000} Arch   BIOS
     [   100000,    11247f] {    12480} Sigma0 sigma0
     [   140000,    18007f] {    40080} Root   moe
     [   182038,    1940e7] {    120b0} Root   moe
     [   2d0400,    2e1257] {    10e58} Boot   bootstrap
     [   300000,    34afff] {    4b000} Kern   fiasco
     [   400000,    62efff] {   22f000} Kern   fiasco
     [  1019000,   101efff] {     6000} Boot   bootstrap-ptab64
     [  1151000,   119afff] {    4a000} Root   Module
     [ 3e2e0000,  3e2fffff] {    20000} Arch   BIOS
     [ 78763000,  78772fff] {    10000} Arch   BIOS
     [ 7de45000,  7df1cfff] {    d8000} Arch   BIOS
     [ 7df1d000,  7df99fff] {    7d000} Arch   BIOS
     [ 7df9a000,  7e3aafff] {   411000} Arch   BIOS
     [ 7e3ab000,  7f34afff] {   fa0000} Arch   BIOS
     [ 7f800000,  7fffffff] {   800000} Arch   BIOS
     [ e0000000,  efffffff] { 10000000} Arch   BIOS
     [ fd000000,  fe7fffff] {  1800000} Arch   BIOS
     [ ff000000,  ffffffff] {  1000000} Arch   BIOS
   found kernel options (via ELF) at 401000
   Sigma0 config    ip:00000000001004a0 sp:0000000000000000
   Roottask config  ip:00000000001419ed sp:0000000000000000
   Starting kernel fiasco at 0000000000300910

Welcome to L4/Fiasco.OC!
L4/Fiasco.OC microkernel on amd64
Rev: unknown compiled with gcc 7.5.0 for x86-64    []
Build: #7 Mon Dec 14 11:40:53 PST 2020

Performance-critical config option(s) detected:
   CONFIG_NDEBUG is off

Superpages: yes
Kmem:: TSS mem at 8053f9000 (4096Bytes)
VMX: enabled
VMX: EPT supported
VMX: initialized
ACPI: RSDP[0xf05b0]     r02 OEM:ALASKA
FPU0: SSE
ACPI: FACS phys=7e3a9080 virt=0x203a9080
ACPI: HW sig=cd
SERIAL ESC: allocated IRQ 4 for serial uart
VMX: init page sizes
SERIAL ESC: allocated IRQ 4 for serial uart
Not using serial hack in slow timer handler.
CPU[0]: GenuineIntel (6:5F:1:0)[000506f1] Model: Intel(R) Atom(TM) CPU 
C3558 @ 2.20GHz at 2199MHz


Freeing init code/data: 20480 bytes (5 pages)

MP: detecting APs...
After tramp_page


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