Add QEMU support for extboot
This patch adds support to QEMU for extboot. It requires that an extboot.bin
binary be copied into the pc-bios directory or else make install will not
function properly.
To use extboot to boot from an arbitrary block device, simply append a
",boot=on" to the block device to boot from. For instance, to boot from a SCSI
disk, one would use:
-drive file=/path/to/image.img,if=scsi,boot=on
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>