diff options
Diffstat (limited to 'drivers/xen/events/events_base.c')
| -rw-r--r-- | drivers/xen/events/events_base.c | 78 |
1 files changed, 49 insertions, 29 deletions
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c index a8030332a191..adb7260e94b2 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -63,6 +63,7 @@ #include <xen/interface/physdev.h> #include <xen/interface/sched.h> #include <xen/interface/vcpu.h> +#include <xen/xenbus.h> #include <asm/hw_irq.h> #include "events_internal.h" @@ -115,6 +116,7 @@ struct irq_info { unsigned char flags; uint16_t domid; } pirq; + struct xenbus_device *interdomain; } u; }; @@ -313,11 +315,18 @@ static int xen_irq_info_common_setup(struct irq_info *info, } static int xen_irq_info_evtchn_setup(unsigned irq, - evtchn_port_t evtchn) + evtchn_port_t evtchn, + struct xenbus_device *dev) { struct irq_info *info = info_for_irq(irq); + int ret; + + ret = xen_irq_info_common_setup(info, irq, IRQT_EVTCHN, evtchn, 0); + info->u.interdomain = dev; + if (dev) + atomic_inc(&dev->event_channels); - return xen_irq_info_common_setup(info, irq, IRQT_EVTCHN, evtchn, 0); + return ret; } static int xen_irq_info_ipi_setup(unsigned cpu, @@ -561,18 +570,28 @@ static void xen_irq_lateeoi_locked(struct irq_info *info, bool spurious) return; if (spurious) { + struct xenbus_device *dev = info->u.interdomain; + unsigned int threshold = 1; + + if (dev && dev->spurious_threshold) + threshold = dev->spurious_threshold; + if ((1 << info->spurious_cnt) < (HZ << 2)) { if (info->spurious_cnt != 0xFF) info->spurious_cnt++; } - if (info->spurious_cnt > 1) { - delay = 1 << (info->spurious_cnt - 2); + if (info->spurious_cnt > threshold) { + delay = 1 << (info->spurious_cnt - 1 - threshold); if (delay > HZ) delay = HZ; if (!info->eoi_time) info->eoi_cpu = smp_processor_id(); info->eoi_time = get_jiffies_64() + delay; + if (dev) + atomic_add(delay, &dev->jiffies_eoi_delayed); } + if (dev) + atomic_inc(&dev->spurious_events); } else { info->spurious_cnt = 0; } @@ -901,6 +920,7 @@ static void __unbind_from_irq(unsigned int irq) if (VALID_EVTCHN(evtchn)) { unsigned int cpu = cpu_from_irq(irq); + struct xenbus_device *dev; xen_evtchn_close(evtchn); @@ -911,6 +931,11 @@ static void __unbind_from_irq(unsigned int irq) case IRQT_IPI: per_cpu(ipi_to_irq, cpu)[ipi_from_irq(irq)] = -1; break; + case IRQT_EVTCHN: + dev = info->u.interdomain; + if (dev) + atomic_dec(&dev->event_channels); + break; default: break; } @@ -1116,7 +1141,8 @@ int xen_pirq_from_irq(unsigned irq) } EXPORT_SYMBOL_GPL(xen_pirq_from_irq); -static int bind_evtchn_to_irq_chip(evtchn_port_t evtchn, struct irq_chip *chip) +static int bind_evtchn_to_irq_chip(evtchn_port_t evtchn, struct irq_chip *chip, + struct xenbus_device *dev) { int irq; int ret; @@ -1136,7 +1162,7 @@ static int bind_evtchn_to_irq_chip(evtchn_port_t evtchn, struct irq_chip *chip) irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "event"); - ret = xen_irq_info_evtchn_setup(irq, evtchn); + ret = xen_irq_info_evtchn_setup(irq, evtchn, dev); if (ret < 0) { __unbind_from_irq(irq); irq = ret; @@ -1163,7 +1189,7 @@ out: int bind_evtchn_to_irq(evtchn_port_t evtchn) { - return bind_evtchn_to_irq_chip(evtchn, &xen_dynamic_chip); + return bind_evtchn_to_irq_chip(evtchn, &xen_dynamic_chip, NULL); } EXPORT_SYMBOL_GPL(bind_evtchn_to_irq); @@ -1212,27 +1238,27 @@ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu) return irq; } -static int bind_interdomain_evtchn_to_irq_chip(unsigned int remote_domain, +static int bind_interdomain_evtchn_to_irq_chip(struct xenbus_device *dev, evtchn_port_t remote_port, struct irq_chip *chip) { struct evtchn_bind_interdomain bind_interdomain; int err; - bind_interdomain.remote_dom = remote_domain; + bind_interdomain.remote_dom = dev->otherend_id; bind_interdomain.remote_port = remote_port; err = HYPERVISOR_event_channel_op(EVTCHNOP_bind_interdomain, &bind_interdomain); return err ? : bind_evtchn_to_irq_chip(bind_interdomain.local_port, - chip); + chip, dev); } -int bind_interdomain_evtchn_to_irq_lateeoi(unsigned int remote_domain, +int bind_interdomain_evtchn_to_irq_lateeoi(struct xenbus_device *dev, evtchn_port_t remote_port) { - return bind_interdomain_evtchn_to_irq_chip(remote_domain, remote_port, + return bind_interdomain_evtchn_to_irq_chip(dev, remote_port, &xen_lateeoi_chip); } EXPORT_SYMBOL_GPL(bind_interdomain_evtchn_to_irq_lateeoi); @@ -1345,7 +1371,7 @@ static int bind_evtchn_to_irqhandler_chip(evtchn_port_t evtchn, { int irq, retval; - irq = bind_evtchn_to_irq_chip(evtchn, chip); + irq = bind_evtchn_to_irq_chip(evtchn, chip, NULL); if (irq < 0) return irq; retval = request_irq(irq, handler, irqflags, devname, dev_id); @@ -1380,14 +1406,13 @@ int bind_evtchn_to_irqhandler_lateeoi(evtchn_port_t evtchn, EXPORT_SYMBOL_GPL(bind_evtchn_to_irqhandler_lateeoi); static int bind_interdomain_evtchn_to_irqhandler_chip( - unsigned int remote_domain, evtchn_port_t remote_port, + struct xenbus_device *dev, evtchn_port_t remote_port, irq_handler_t handler, unsigned long irqflags, const char *devname, void *dev_id, struct irq_chip *chip) { int irq, retval; - irq = bind_interdomain_evtchn_to_irq_chip(remote_domain, remote_port, - chip); + irq = bind_interdomain_evtchn_to_irq_chip(dev, remote_port, chip); if (irq < 0) return irq; @@ -1400,14 +1425,14 @@ static int bind_interdomain_evtchn_to_irqhandler_chip( return irq; } -int bind_interdomain_evtchn_to_irqhandler_lateeoi(unsigned int remote_domain, +int bind_interdomain_evtchn_to_irqhandler_lateeoi(struct xenbus_device *dev, evtchn_port_t remote_port, irq_handler_t handler, unsigned long irqflags, const char *devname, void *dev_id) { - return bind_interdomain_evtchn_to_irqhandler_chip(remote_domain, + return bind_interdomain_evtchn_to_irqhandler_chip(dev, remote_port, handler, irqflags, devname, dev_id, &xen_lateeoi_chip); } @@ -1574,6 +1599,7 @@ void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl) { int irq; struct irq_info *info; + struct xenbus_device *dev; irq = get_evtchn_to_irq(port); if (irq == -1) @@ -1603,6 +1629,10 @@ void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl) info = info_for_irq(irq); + dev = (info->type == IRQT_EVTCHN) ? info->u.interdomain : NULL; + if (dev) + atomic_inc(&dev->events); + if (ctrl->defer_eoi) { info->eoi_cpu = smp_processor_id(); info->irq_epoch = __this_cpu_read(irq_epoch); @@ -1679,7 +1709,7 @@ void rebind_evtchn_irq(evtchn_port_t evtchn, int irq) so there should be a proper type */ BUG_ON(info->type == IRQT_UNBOUND); - (void)xen_irq_info_evtchn_setup(irq, evtchn); + (void)xen_irq_info_evtchn_setup(irq, evtchn, NULL); mutex_unlock(&irq_mapping_update_lock); @@ -2060,16 +2090,6 @@ static struct irq_chip xen_percpu_chip __read_mostly = { .irq_ack = ack_dynirq, }; -int xen_set_callback_via(uint64_t via) -{ - struct xen_hvm_param a; - a.domid = DOMID_SELF; - a.index = HVM_PARAM_CALLBACK_IRQ; - a.value = via; - return HYPERVISOR_hvm_op(HVMOP_set_param, &a); -} -EXPORT_SYMBOL_GPL(xen_set_callback_via); - #ifdef CONFIG_XEN_PVHVM /* Vector callbacks are better than PCI interrupts to receive event * channel notifications because we can receive vector callbacks on any |