Hi,

These patches allow users to configure bootable device in guest configration file.
The shadow memory, which mean memory area loading option ROM, is small.
So if we specified many pass-through device, hvmloader cannot load all of option ROM.
We want to select a device which we want to load the option ROM.
After applying these patches, we need to specify pci option of bootable device like below.

pci = [ '01:00.0,boot=1' ]

boot=1 means bootable, boot=0 and no boot option mean non-bootable.

BTW, if we don't specify the boot=1 option, we can boot from emulation disks
and we can boot faster because option ROM is not initialized.

These patches use cmos(0x60) as a place retaining the devfn of bootable device.
Bochs BIOS doesn't seems to use the offset 0x60.
What do you think of using cmos(0x60)?
Do you have some ideas?

Signed-off-by: Akio Takebe <takebe_akio@jp.fujitsu.com>

Best Regards,

Akio Takebe