Booting mfsBSD via PXE with UEFI

I'm trying to boot mfsBSD ISO via PXE on a host with UEFI boot enabled. It was a pretty simple task with BIOS boot, the ipxe config for this task looked like this: kernel --name freebsd http://pxe.host/memdisk initrd http://pxe.host/mfsbsd.img imgargs freebsd harddisk raw boot Since memdisk way is not supported with UEFI boot method and it seems like there is no other way to boot mfsBSD directly, I switched to booting GRUB2 first: kernel --name grub2 http://pxe.host/grub2.efi boot So now I'm trying to boot an mfsBSD ISO from there, here's how my grub.cfg looks like: insmod efinet insmod tftp insmod loopback insmod iso9660 insmod ufs2 insmod part_msdos insmod gfxterm insmod vbe menuentry "mfs12.1.iso" { set isofile=(tftp)/mfs12.1.iso loopback loop $isofile echo "ISO mounted" set root=(loop) kfreebsd /boot/kernel/kernel.gz echo "kernel loaded" kfreebsd_loadenv /boot/device.hints kfreebsd_module /boot/kernel/ahci.ko echo "ahci.ko loaded" kfreebsd_module /mfsroot.gz type=mfs_root set kFreeBSD.vfs.root.mountfrom="ufs:/dev/md0" echo "set kFreeBSD.vfs.root.mountfrom" set kFreeBSD.mfs_type="mfs_root" echo "set kFreeBSD.mfs_type" set kFreeBSD.mfs_name="/mfsroot" echo "set kFreeBSD.mfs_name" set kFreeBSD.mfsbsd.autodhcp="YES" echo "set kFreeBSD.mfsbsd.autodhcp" } Unfortunately, the boot hangs every time with no information on screen: I've tried changing kFreeBSD.vfs.root.mountfrom to "cd9660:/dev/md0" with no result, tried different mfsBSD versions and also built an EFI-enabled ISO using this solution: https://github.com/mmatuska/mfsbsd/pull/100 Is there anything I am missing in this setup? I would greatly appreciate any help.