From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Vrabel Subject: Re: [PATCH-WIP 07/13] xen/arm: receive xen events on arm Date: Fri, 24 Feb 2012 11:12:45 +0000 Message-ID: <4F4770AD.6040703@citrix.com> References: <1330019314-20865-7-git-send-email-stefano.stabellini@eu.citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1330019314-20865-7-git-send-email-stefano.stabellini@eu.citrix.com> Sender: linux-kernel-owner@vger.kernel.org To: Stefano Stabellini Cc: "linux-kernel@vger.kernel.org" , "xen-devel@lists.xensource.com" , "arnd@arndb.de" , "linux-arm-kernel@lists.infradead.org" , "catalin.marinas@arm.com" , "linaro-dev@lists.linaro.org" , Ian Campbell List-Id: xen-devel@lists.xenproject.org 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 > +#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