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xen-devel
Re: [Xen-devel] Re: [Qemu-devel] [PATCH 1/7] xen: groundwork for xen sup
Daniel P. Berrange wrote:
On Mon, Jul 28, 2008 at 04:52:28PM +0200, Gerd Hoffmann wrote:
+/* xen_machine.c */
+extern QEMUMachine xenpv_machine;
+extern QEMUMachine xenfv_machine;
Why does xenfv need its own machine type?
This is how xen's qemu-dm handles it at the moment and I've decided to
do it the same way for simplicity. I think qemu could also figure it
using a hypercall.
This is something I originally added to QEMU in Xen's tree. The basic
idea is that the 'xenpv' macjine is a machine which /only/ provides the
paravirtualized Xen backends drivers. The 'xenfv' machine type is just
the same as the 'pc' machine type, but with the /addition/ of the Xen
paravirtualized backends. Perhaps the latter could be thought of as
more of a 'xenpc' (cf 'pc' and 'isapc') becasue its a variation on the
regular PC machine type. Annoying that all the acronyms I come up with
only differ by one letter :-)
Why wouldn't the Xen backends be added by appropriate -net or -drive
options? For instance, qemu -drive file=foo.img,if=xen -net nic,model=xen
Regards,
Anthony Liguori
Daniel
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