xc_dom_guest_type: image not capable of booting inside a HV M container: Invalid kernel

[Mario Marietto <marietto2008@xxxxxxxxx>]

Hello.

Finally I tried to recompile the FreeBSD kernel using the @Elliott Mitchell code because I want to boot FreeBSD as domU with Xen installed on my Arm 32 bit Chromebook. Unfortunately it didn't work at all. Maybe I've missed something / I haven't understood well what to do. Please give me some suggestions.

Basically this is what I did :

$ created a vm called FreeBSD-13.2-RELEASE-armv7.img with qemu / kvm / libvirt / virt-manager

$ within the vm : mkdir /build-xen

$ cd /usr

$ git clone https://gitlab.com/ehem/freebsd-src.git

$ cd freebsd-src

$ make KERNCONF=GENERIC TARGET=arm TARGET_ARCH=armv7 buildkernel

$ make KERNCONF=GENERIC TARGET=arm TARGET_ARCH=armv7 DESTDIR=/build-xen installkernel

$ echo "/dev/xbd0 / ufs rw 1 1" > /mnt/etc/fstab

$ nano /etc/ttys (add the line 'xc0 "/usr/libexec/getty Pc" xterm on secure")

$ renamed the directories dtb to dtb_ and kernel to kernel_ that are inside the /boot dir of the vm

$ copied the directory dtb and kernel from the directory /build-xen to the directory /boot inside the vm

$ shut down the vm

$ copied the directory /build-xen outside of the vm using this method (in this case I used Linux installed on the Host OS,because the kernel that I'm using on the Chromebook has the kernel parameter related to the ufs2 fs set to off) :

on my X64 workstation :

# modprobe ufs

# sudo losetup -fP FreeBSD-13.2-RELEASE-armv7.img

# ls /dev/loop0*

/dev/loop0 /dev/loop0p1 /dev/loop0p2 /dev/loop0p5

# mount -t ufs -o ufstype=ufs2 /dev/loop0p5 ./FreeBSD-xen

then :

# nano freebsd.cfg

kernel="/mnt/zroot2/zroot2/OS/Chromebook/domU/freebsd-xen/boot-xen/kernel/kernel"

memory=64

name="freebsd"

vcpus=1

autoballon="off"

disk=[ 'phy:/dev/loop0,xvda,w' ]

# nano start-freebsd

losetup -fP FreeBSD-13.2-RELEASE-armv7.img

xl create freebsd.cfg

xl console freebsd

# ./start-freebsd

Parsing config from freebsd.cfg

xc: error: panic: xg_dom_elfloader.c:63: xc_dom_guest_type: image not capable of booting inside a HV

M container: Invalid kernel

libxl: error: libxl_dom.c:571:libxl__build_dom: xc_dom_parse_image failed

libxl: error: libxl_create.c:1640:domcreate_rebuild_done: Domain 1:cannot (re-)build domain: -3

libxl: error: libxl_domain.c:1183:libxl__destroy_domid: Domain 1:Non-existent domain

libxl: error: libxl_domain.c:1137:domain_destroy_callback: Domain 1:Unable to destroy guest

libxl: error: libxl_domain.c:1064:domain_destroy_cb: Domain 1:Destruction of domain failed

freebsd is an invalid domain identifier (rc=-6)

I have also tried with kernel.bin :

# nano freebsd.cfg

kernel="/mnt/zroot2/zroot2/OS/Chromebook/domU/freebsd-xen/boot-xen/kernel/kernel.bin"

memory=64

name="freebsd"

vcpus=1

autoballon="off"

disk=[ 'phy:/dev/loop0,xvda,w' ]

# ./start-freebsd

Parsing config from freebsd.cfg

xc: error: panic: xg_dom_core.c:689: xc_dom_find_loader: no loader found: Invalid kernel

libxl: error: libxl_dom.c:571:libxl__build_dom: xc_dom_parse_image failed

libxl: error: libxl_create.c:1640:domcreate_rebuild_done: Domain 2:cannot (re-)build domain: -3

libxl: error: libxl_domain.c:1183:libxl__destroy_domid: Domain 2:Non-existent domain

libxl: error: libxl_domain.c:1137:domain_destroy_callback: Domain 2:Unable to destroy guest

libxl: error: libxl_domain.c:1064:domain_destroy_cb: Domain 2:Destruction of domain failed

freebsd is an invalid domain identifier (rc=-6)

--

Mario.