diff options
Diffstat (limited to 'drivers/xen/events/events_base.c')
| -rw-r--r-- | drivers/xen/events/events_base.c | 63 |
1 files changed, 57 insertions, 6 deletions
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c index 436682db41c5..1c25580c7691 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -70,6 +70,57 @@ #undef MODULE_PARAM_PREFIX #define MODULE_PARAM_PREFIX "xen." +/* Interrupt types. */ +enum xen_irq_type { + IRQT_UNBOUND = 0, + IRQT_PIRQ, + IRQT_VIRQ, + IRQT_IPI, + IRQT_EVTCHN +}; + +/* + * Packed IRQ information: + * type - enum xen_irq_type + * event channel - irq->event channel mapping + * cpu - cpu this event channel is bound to + * index - type-specific information: + * PIRQ - vector, with MSB being "needs EIO", or physical IRQ of the HVM + * guest, or GSI (real passthrough IRQ) of the device. + * VIRQ - virq number + * IPI - IPI vector + * EVTCHN - + */ +struct irq_info { + struct list_head list; + struct list_head eoi_list; + short refcnt; + short spurious_cnt; + enum xen_irq_type type; /* type */ + unsigned irq; + evtchn_port_t evtchn; /* event channel */ + unsigned short cpu; /* cpu bound */ + unsigned short eoi_cpu; /* EOI must happen on this cpu-1 */ + unsigned int irq_epoch; /* If eoi_cpu valid: irq_epoch of event */ + u64 eoi_time; /* Time in jiffies when to EOI. */ + + union { + unsigned short virq; + enum ipi_vector ipi; + struct { + unsigned short pirq; + unsigned short gsi; + unsigned char vector; + unsigned char flags; + uint16_t domid; + } pirq; + } u; +}; + +#define PIRQ_NEEDS_EOI (1 << 0) +#define PIRQ_SHAREABLE (1 << 1) +#define PIRQ_MSI_GROUP (1 << 2) + static uint __read_mostly event_loop_timeout = 2; module_param(event_loop_timeout, uint, 0644); @@ -110,7 +161,7 @@ static DEFINE_PER_CPU(int [NR_VIRQS], virq_to_irq) = {[0 ... NR_VIRQS-1] = -1}; /* IRQ <-> IPI mapping */ static DEFINE_PER_CPU(int [XEN_NR_IPIS], ipi_to_irq) = {[0 ... XEN_NR_IPIS-1] = -1}; -int **evtchn_to_irq; +static int **evtchn_to_irq; #ifdef CONFIG_X86 static unsigned long *pirq_eoi_map; #endif @@ -190,7 +241,7 @@ int get_evtchn_to_irq(evtchn_port_t evtchn) } /* Get info for IRQ */ -struct irq_info *info_for_irq(unsigned irq) +static struct irq_info *info_for_irq(unsigned irq) { if (irq < nr_legacy_irqs()) return legacy_info_ptrs[irq]; @@ -228,7 +279,7 @@ static int xen_irq_info_common_setup(struct irq_info *info, irq_clear_status_flags(irq, IRQ_NOREQUEST|IRQ_NOAUTOEN); - return xen_evtchn_port_setup(info); + return xen_evtchn_port_setup(evtchn); } static int xen_irq_info_evtchn_setup(unsigned irq, @@ -351,7 +402,7 @@ static enum xen_irq_type type_from_irq(unsigned irq) return info_for_irq(irq)->type; } -unsigned cpu_from_irq(unsigned irq) +static unsigned cpu_from_irq(unsigned irq) { return info_for_irq(irq)->cpu; } @@ -391,7 +442,7 @@ static void bind_evtchn_to_cpu(evtchn_port_t evtchn, unsigned int cpu) #ifdef CONFIG_SMP cpumask_copy(irq_get_affinity_mask(irq), cpumask_of(cpu)); #endif - xen_evtchn_port_bind_to_cpu(info, cpu); + xen_evtchn_port_bind_to_cpu(evtchn, cpu, info->cpu); info->cpu = cpu; } @@ -745,7 +796,7 @@ static unsigned int __startup_pirq(unsigned int irq) info->evtchn = evtchn; bind_evtchn_to_cpu(evtchn, 0); - rc = xen_evtchn_port_setup(info); + rc = xen_evtchn_port_setup(evtchn); if (rc) goto err; |