Booting an AArch64 QEMU guest inside an AArch64 guest running on AArch64
host
========================================================================

(1) Use Gerd Hoffman's repo for firmware:

    $ cd /etc/yum.repos.d
    $ sudo wget https://www.kraxel.org/repos/firmware.repo 
    $ sudo dnf install edk2.git-aarch64
    $ rpm -ql edk2.git-aarch64
    /usr/share/doc/edk2.git-aarch64-0
    /usr/share/doc/edk2.git-aarch64-0/License.txt
    /usr/share/edk2.git
    /usr/share/edk2.git/aarch64
    /usr/share/edk2.git/aarch64/QEMU_EFI-pflash.raw
    /usr/share/edk2.git/aarch64/QEMU_EFI.fd
    /usr/share/edk2.git/aarch64/vars-template-pflash.raw


(2) Create an AArch64 Fedora 21 disk image:

    $ virt-builder fedora-21 -o f21vm.qcow2 \
        --root-password password:123456  --format qcow2


(3) Get the NVRAM from here:

    $ wget http://libguestfs.org/download/builder/fedora-21-aarch64-nvram.xz
    $ unxz fedora-21-aarch64-nvram.xz


(4) Boot the below QEMU CLI:

    $ qemu-system-aarch64 \
        -nodefconfig -nodefaults -display none \
        -M virt -cpu cortex-a57 -machine accel=tcg -m 2048 \
        -drive if=pflash,format=raw,file=/usr/share/edk2.git/aarch64/QEMU_EFI-pflash.raw,readonly \
        -drive if=pflash,format=raw,file=./fedora-21-aarch64-nvram \
        -drive file=f21vm.qcow2,format=qcow2,if=none,id=hd0 \
        -device virtio-blk-device,drive=hd0 \
        -serial stdio |& tee stderr-qemu-aarch64-boot-l2.txt


Result of the serial console output, it fails with:

    . . .
     ESR : EC 0x00  IL 0x0  ISS 0x00000000
    ASSERT /var/lib/jenkins/jobs/edk2/workspace/rpmbuild/rpm/BUILD/edk2.git/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c(186): ((BOOLEAN)(0==1))

Complete output here:

    https://kashyapc.fedorapeople.org/arm/stderr-qemu-aarch64-failed-guest-boot.txt