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xen-devel
Re: [Xen-devel] ia64 event channels
Matt Chapman wrote:
This is the one change we've made to architecture-independent code
for event channels. Rather than polling the event channel flags
on every return, we pend an interrupt in evtchn_set_pending.
This might be better abstracted into some architecture-dependent
header file, but I'm not sure where. We could add an asm/event.h,
though it does seem a bit excessive to add a file just for one
trivial hook.
Not all event channel events get injected into the guest. For eg, on
VT-x and VT-i, we use event channels to communicate events from the
device models to the hypervisor on handling memory mapped and accesses
to I/O ports.
Have you already looked at this patch:
http://article.gmane.org/gmane.comp.emulators.xen.devel/10852
vmx_check_guest_event() does something very similar.
Also, it might be good to unify the names (callback_irq vs evtchn_vector
-- I like evtchn_vector better).
-Arun
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