On 25/07/15 18:34, Julien Grall wrote: > Currently, the event channel rebind code is gated with the presence of > the vector callback. > > The virtual interrupt controller on ARM has the concept of per-CPU > interrupt (PPI) which allow us to support per-VCPU event channel. > Therefore there is no need of vector callback for ARM. > > Xen is already using a free PPI to notify the guest VCPU of an event. > Furthermore, the xen code initialization in Linux (see > arch/arm/xen/enlighten.c) is requesting correctly a per-CPU IRQ. > > Introduce new macro xen_support_evtchn_rebind to allow architecture > decide whether rebind an event is support or not. It will always return > 1 on ARM and keep the same behavior on x86. > > This is also allow us to drop the usage of xen_have_vector_callback > entirely in the ARM code.
Reviewed-by: David Vrabel <david.vra...@citrix.com> Provided you make xen_support_evtchn_rebind() an inline function. David _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
