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SubjectRe: [PATCH v3 3/6] vbus: add a "vbus-proxy" bus model for vbus_driver objects
On 08/18/2009 12:53 PM, Michael S. Tsirkin wrote:
> I'm not hung up on PCI, myself. An idea that might help you get Avi
> on-board: do setup in userspace, over PCI. Negotiate hypercall support
> (e.g. with a PCI capability) and then switch to that for fastpath. Hmm?
>

Hypercalls don't nest well. When a nested guest issues a hypercall, you
have to assume it is destined to the enclosing guest, so you can't
assign a hypercall-capable device to a nested guest.

mmio and pio don't have this problem since the host can use the address
to locate the destination.

--
error compiling committee.c: too many arguments to function



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