ovmf

Steps to run efi shell on qemu 
(Ideal test env to test uefi apps)

1. install qemu
2. Create hdd img 
        dd if=/dev/zero of=/home/devbox/efi-work/tools/run-ovmf/disk.img bs=512 count=93750
3. Format hdd

        gdisk disk.img 
        GPT fdisk (gdisk) version 1.0.1

        Partition table scan:
        MBR: not present
        BSD: not present
        APM: not present
        GPT: not present

        Creating new GPT entries.

        Command (? for help): o
        This option deletes all partitions and creates a new protective MBR.
        Proceed? (Y/N): y

        Command (? for help): n
        Partition number (1-128, default 1):  
        First sector (34-93716, default = 2048) or {+-}size{KMGTP}: 
        Last sector (2048-93716, default = 93716) or {+-}size{KMGTP}: 
        Current type is 'Linux filesystem'
        Hex code or GUID (L to show codes, Enter = 8300): ef00
        Changed type of partition to 'EFI System'

        Command (? for help): w

        Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
        PARTITIONS!!

        Do you want to proceed? (Y/N): y
        OK; writing new GUID partition table (GPT) to disk.img.
        Warning: The kernel is still using the old partition table.
        The new table will be used at the next reboot or after you
        run partprobe(8) or kpartx(8)
        The operation has completed successfully.
4.losetup to present the partition to Linux on a loopback device
        losetup --offset 1048576 --sizelimit 46934528 /dev/loop10 disk.img
5.Format the partition
6.Mount device for use
        mount /dev/loop10 /mnt
7. Copy apps to mounted partition 
         cp ../edk2/Build/DuetPkgX64/DEBUG_GCC49/X64/SkApps.efi /mnt/
8. Unmount 
         umount /mnt
9. run qemu with prepared disk image
        qemu-system-x86_64 -cpu qemu64 -bios bios.bin -drive file=disk.img