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Commit 0dc0064a authored by David Vrabel's avatar David Vrabel Committed by Konrad Rzeszutek Wilk
Browse files

xen/evtchn: support more than 4096 ports 



Remove the check during unbind for NR_EVENT_CHANNELS as this limits
support to less than 4096 ports.

Signed-off-by: default avatarDavid Vrabel <david.vrabel@citrix.com>
Reviewed-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
parent fd21069d

drivers/xen/events/events_base.c

+13 −0
Original line number Diff line number Diff line
@@ -952,6 +952,19 @@ static int find_virq(unsigned int virq, unsigned int cpu) 
	return rc;

}



/**

 * xen_evtchn_nr_channels - number of usable event channel ports

 *

 * This may be less than the maximum supported by the current

 * hypervisor ABI. Use xen_evtchn_max_channels() for the maximum

 * supported.

 */

unsigned xen_evtchn_nr_channels(void)

{

        return evtchn_ops->nr_channels();

}

EXPORT_SYMBOL_GPL(xen_evtchn_nr_channels);



int bind_virq_to_irq(unsigned int virq, unsigned int cpu)

{

	struct evtchn_bind_virq bind_virq;

drivers/xen/events/events_internal.h

+0 −5
Original line number Diff line number Diff line
@@ -85,11 +85,6 @@ static inline unsigned xen_evtchn_max_channels(void) 
	return evtchn_ops->max_channels();

}



static inline unsigned xen_evtchn_nr_channels(void)

{

	return evtchn_ops->nr_channels();

}



/*

 * Do any ABI specific setup for a bound event channel before it can

 * be unmasked and used.

drivers/xen/evtchn.c

+1 −1
Original line number Diff line number Diff line
@@ -417,7 +417,7 @@ static long evtchn_ioctl(struct file *file, 
			break;



		rc = -EINVAL;

		if (unbind.port >= NR_EVENT_CHANNELS)

		if (unbind.port >= xen_evtchn_nr_channels())

			break;



		rc = -ENOTCONN;

include/xen/events.h

+2 −0
Original line number Diff line number Diff line
@@ -7,6 +7,8 @@ 
#include <asm/xen/hypercall.h>

#include <asm/xen/events.h>



unsigned xen_evtchn_nr_channels(void);



int bind_evtchn_to_irq(unsigned int evtchn);

int bind_evtchn_to_irqhandler(unsigned int evtchn,

			      irq_handler_t handler,