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    SubjectRe: [PATCH-WIP 07/13] xen/arm: receive xen events on arm
    On 23/02/12 17:48, Stefano Stabellini wrote:
    > Compile events.c and use IRQ 32 to receive events notifications.
    >
    > Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

    > +#ifdef CONFIG_ARM
    > +#define IRQ_EVTCHN_CALLBACK 63
    > +irqreturn_t xen_arm_callback(int irq, void *arg)
    > +{
    > + __xen_evtchn_do_upcall();
    > + return 0;
    > +}
    > +
    > +int __init xen_init_IRQ_arm(void)
    > +{
    > + int rc;
    > + xen_init_IRQ();
    > + rc = request_irq(IRQ_EVTCHN_CALLBACK, xen_arm_callback,
    > + IRQF_DISABLED | IRQF_NOBALANCING | IRQF_TRIGGER_RISING,
    > + "events", "events");
    > + if (rc) {
    > + printk(KERN_ERR "Error requesting IRQ %d\n", IRQ_EVTCHN_CALLBACK);
    > + }
    > + return rc;
    > +}
    > +core_initcall(xen_init_IRQ_arm);
    > +#endif

    You should (eventually) have a device tree binding for the event channel
    and use a OF (device tree) device driver instead of this core_initcall()
    to register the handler etc.

    David



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