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xen/events: remove unnecessary init_evtchn_cpu_bindings()

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Because the guest-side binding of an event to a VCPU (i.e., setting
the local per-cpu masks) is always explicitly done after an event
channel is bound to a port, there is no need to initialize all
possible events as bound to VCPU 0 at start of day or after a resume.

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>
This commit is contained in:
David Vrabel 2013-03-13 13:20:52 +00:00 committed by Konrad Rzeszutek Wilk
parent 8729518506
commit fc087e1073
1 changed files with 0 additions and 22 deletions
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22
drivers/xen/events.c
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@ -334,24 +334,6 @@ static void bind_evtchn_to_cpu(unsigned int chn, unsigned int cpu)
info_for_irq(irq)->cpu = cpu;
}
static void init_evtchn_cpu_bindings(void)
{
int i;
#ifdef CONFIG_SMP
struct irq_info *info;
/* By default all event channels notify CPU#0. */
list_for_each_entry(info, &xen_irq_list_head, list) {
struct irq_desc *desc = irq_to_desc(info->irq);
cpumask_copy(desc->irq_data.affinity, cpumask_of(0));
}
#endif
for_each_possible_cpu(i)
memset(per_cpu(cpu_evtchn_mask, i),
(i == 0) ? ~0 : 0, NR_EVENT_CHANNELS/8);
}
static inline void clear_evtchn(int port)
{
struct shared_info *s = HYPERVISOR_shared_info;
@ -1778,8 +1760,6 @@ void xen_irq_resume(void)
unsigned int cpu, evtchn;
struct irq_info *info;
init_evtchn_cpu_bindings();
/* New event-channel space is not 'live' yet. */
for (evtchn = 0; evtchn < NR_EVENT_CHANNELS; evtchn++)
mask_evtchn(evtchn);
@ -1890,8 +1870,6 @@ void __init xen_init_IRQ(void)
for (i = 0; i < NR_EVENT_CHANNELS; i++)
evtchn_to_irq[i] = -1;
init_evtchn_cpu_bindings();
/* No event channels are 'live' right now. */
for (i = 0; i < NR_EVENT_CHANNELS; i++)
mask_evtchn(i);