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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: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
hifive-unleashed-5.1
David Vrabel 2013-09-23 21:03:38 +01:00 committed by Konrad Rzeszutek Wilk
parent fd21069dfe
commit 0dc0064add
4 changed files with 16 additions and 6 deletions
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13
drivers/xen/events/events_base.c
View File

@ -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;

5
drivers/xen/events/events_internal.h
View File

@ -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.

2
drivers/xen/evtchn.c
View File

@ -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;

2
include/xen/events.h
View File

@ -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,