Re: [Qemu-devel] [Xen-devel] [XEN][RFC PATCH V2 12/17] xl: Add interface to handle qemu disaggregation

[Julien Grall]

On 08/24/2012 02:03 PM, Ian Campbell wrote:

@@ -246,6 +246,20 @@ libxl_domain_sched_params = Struct("domain_sched_params",[
       ("extratime",    integer, {'init_val': 
'LIBXL_DOMAIN_SCHED_PARAM_EXTRATIME_DEFAULT'}),
       ])

+libxl_dm_cap = Enumeration("dm_cap", [
+    (1, "UI"), # Emulate all UI + default device

What does "default device" equate too?

The following devices:
     - i440fx
     - piix3
     - piix4
     - dma
     - xen apic
     - xen platform

So this is more like "CORE" than "UI"?

Is there a reason why UI (which I guess means the VGA, spice and VFB
devices?) are required to be in the same emulator as these?

VGA, keyboard and mouse (that can be plug via USB) need
to be in the same emulator. Otherwise we can't use VNC or
something like that.

I made this choice, after discussion with Stefano, because
theses devices depends each others. For instance, keyboard
emulates A20.