[Xen-users] Re: Is xen planning to support hvm guests booting under UEFI?

[jim burns <jim_burn@xxxxxxxxxxxxx>]

On Wed September 21 2011, 9:06:38 PM, jim burns wrote:
> Pls cc: me as I am not subscribed.
[...]
> Putting aside the signing problem for now, the immediate problem is qemu-dm
> as  the emulator for hvm guests, since it provides an emulated *bios*. I've
> always been curious about this, as I've wanted to look forward to the day
> when I can boot an Apple OS/X hvm guest.

http://wiki.xensource.com/xenwiki/XenParavirtOps has been reworked recently. 
Not sure if this was there before:

"Add EFI support in Linux pv-ops. Jan Beulich wrote patches to make Xen 
hypervisor be able to compile as an EFI application. "Build xen.efi, write up 
a config file for it to read (most importantly so it knows what Dom0 kernel 
and initrd to use), and you should be good to go (provided the EFI 
implementation isn't too flawed). This being an EFI application you can simply 
run it from the shell prompt. Parameter for Xen.efi is -cfg <file>, and <file> 
has: kernel=, ramdisk=, options=, video=gfx-x. The Linux pv-ops needs at least 
to parse XEN_VGATYPE_EFI_LFB data, E820 parsed (should be working) and give 
the ACPI subsystem a pointer to the ACPI DSDT without consulting EBDA." 

This doesn't solve the Windows 8 hvm problem, but at least EFI is being 
considered.

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