diff options
Diffstat (limited to 'drivers/xen/events.c')
| -rw-r--r-- | drivers/xen/events.c | 35 |
1 files changed, 22 insertions, 13 deletions
diff --git a/drivers/xen/events.c b/drivers/xen/events.c index 46625cd3874..3141e149d59 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -26,6 +26,7 @@ #include <linux/irq.h> #include <linux/module.h> #include <linux/string.h> +#include <linux/bootmem.h> #include <asm/ptrace.h> #include <asm/irq.h> @@ -75,7 +76,14 @@ enum { static int evtchn_to_irq[NR_EVENT_CHANNELS] = { [0 ... NR_EVENT_CHANNELS-1] = -1 }; -static unsigned long cpu_evtchn_mask[NR_CPUS][NR_EVENT_CHANNELS/BITS_PER_LONG]; +struct cpu_evtchn_s { + unsigned long bits[NR_EVENT_CHANNELS/BITS_PER_LONG]; +}; +static struct cpu_evtchn_s *cpu_evtchn_mask_p; +static inline unsigned long *cpu_evtchn_mask(int cpu) +{ + return cpu_evtchn_mask_p[cpu].bits; +} static u8 cpu_evtchn[NR_EVENT_CHANNELS]; /* Reference counts for bindings to IRQs. */ @@ -115,7 +123,7 @@ static inline unsigned long active_evtchns(unsigned int cpu, unsigned int idx) { return (sh->evtchn_pending[idx] & - cpu_evtchn_mask[cpu][idx] & + cpu_evtchn_mask(cpu)[idx] & ~sh->evtchn_mask[idx]); } @@ -125,11 +133,11 @@ static void bind_evtchn_to_cpu(unsigned int chn, unsigned int cpu) BUG_ON(irq == -1); #ifdef CONFIG_SMP - irq_to_desc(irq)->affinity = cpumask_of_cpu(cpu); + cpumask_copy(irq_to_desc(irq)->affinity, cpumask_of(cpu)); #endif - __clear_bit(chn, cpu_evtchn_mask[cpu_evtchn[chn]]); - __set_bit(chn, cpu_evtchn_mask[cpu]); + __clear_bit(chn, cpu_evtchn_mask(cpu_evtchn[chn])); + __set_bit(chn, cpu_evtchn_mask(cpu)); cpu_evtchn[chn] = cpu; } @@ -142,15 +150,12 @@ static void init_evtchn_cpu_bindings(void) /* By default all event channels notify CPU#0. */ for_each_irq_desc(i, desc) { - if (!desc) - continue; - - desc->affinity = cpumask_of_cpu(0); + cpumask_copy(desc->affinity, cpumask_of(0)); } #endif memset(cpu_evtchn, 0, sizeof(cpu_evtchn)); - memset(cpu_evtchn_mask[0], ~0, sizeof(cpu_evtchn_mask[0])); + memset(cpu_evtchn_mask(0), ~0, sizeof(cpu_evtchn_mask(0))); } static inline unsigned int cpu_from_evtchn(unsigned int evtchn) @@ -588,7 +593,7 @@ void rebind_evtchn_irq(int evtchn, int irq) spin_unlock(&irq_mapping_update_lock); /* new event channels are always bound to cpu 0 */ - irq_set_affinity(irq, cpumask_of_cpu(0)); + irq_set_affinity(irq, cpumask_of(0)); /* Unmask the event channel. */ enable_irq(irq); @@ -617,9 +622,9 @@ static void rebind_irq_to_cpu(unsigned irq, unsigned tcpu) } -static void set_affinity_irq(unsigned irq, cpumask_t dest) +static void set_affinity_irq(unsigned irq, const struct cpumask *dest) { - unsigned tcpu = first_cpu(dest); + unsigned tcpu = cpumask_first(dest); rebind_irq_to_cpu(irq, tcpu); } @@ -825,6 +830,10 @@ static struct irq_chip xen_dynamic_chip __read_mostly = { void __init xen_init_IRQ(void) { int i; + size_t size = nr_cpu_ids * sizeof(struct cpu_evtchn_s); + + cpu_evtchn_mask_p = alloc_bootmem(size); + BUG_ON(cpu_evtchn_mask_p == NULL); init_evtchn_cpu_bindings(); |