diff options
| -rw-r--r-- | arch/x86/xen/enlighten.c | 9 | ||||
| -rw-r--r-- | drivers/video/xen-fbfront.c | 19 | ||||
| -rw-r--r-- | drivers/xen/events.c | 21 |
3 files changed, 35 insertions, 14 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 6aba2a23e2c..7e8d3bc80af 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -1174,6 +1174,15 @@ asmlinkage void __init xen_start_kernel(void) xen_smp_init(); +#ifdef CONFIG_ACPI_NUMA + /* + * The pages we from Xen are not related to machine pages, so + * any NUMA information the kernel tries to get from ACPI will + * be meaningless. Prevent it from trying. + */ + acpi_numa = -1; +#endif + pgd = (pgd_t *)xen_start_info->pt_base; if (!xen_initial_domain()) diff --git a/drivers/video/xen-fbfront.c b/drivers/video/xen-fbfront.c index 4abb0b9ed65..3e6934d4bea 100644 --- a/drivers/video/xen-fbfront.c +++ b/drivers/video/xen-fbfront.c @@ -562,26 +562,24 @@ static void xenfb_init_shared_page(struct xenfb_info *info, static int xenfb_connect_backend(struct xenbus_device *dev, struct xenfb_info *info) { - int ret, evtchn; + int ret, evtchn, irq; struct xenbus_transaction xbt; ret = xenbus_alloc_evtchn(dev, &evtchn); if (ret) return ret; - ret = bind_evtchn_to_irqhandler(evtchn, xenfb_event_handler, + irq = bind_evtchn_to_irqhandler(evtchn, xenfb_event_handler, 0, dev->devicetype, info); - if (ret < 0) { + if (irq < 0) { xenbus_free_evtchn(dev, evtchn); xenbus_dev_fatal(dev, ret, "bind_evtchn_to_irqhandler"); - return ret; + return irq; } - info->irq = ret; - again: ret = xenbus_transaction_start(&xbt); if (ret) { xenbus_dev_fatal(dev, ret, "starting transaction"); - return ret; + goto unbind_irq; } ret = xenbus_printf(xbt, dev->nodename, "page-ref", "%lu", virt_to_mfn(info->page)); @@ -603,20 +601,25 @@ static int xenfb_connect_backend(struct xenbus_device *dev, if (ret == -EAGAIN) goto again; xenbus_dev_fatal(dev, ret, "completing transaction"); - return ret; + goto unbind_irq; } xenbus_switch_state(dev, XenbusStateInitialised); + info->irq = irq; return 0; error_xenbus: xenbus_transaction_end(xbt, 1); xenbus_dev_fatal(dev, ret, "writing xenstore"); + unbind_irq: + unbind_from_irqhandler(irq, info); return ret; } static void xenfb_disconnect_backend(struct xenfb_info *info) { + /* Prevent xenfb refresh */ + info->update_wanted = 0; if (info->irq >= 0) unbind_from_irqhandler(info->irq, info); info->irq = -1; diff --git a/drivers/xen/events.c b/drivers/xen/events.c index 65f8637d13c..74681478100 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -170,6 +170,9 @@ static struct irq_info *info_for_irq(unsigned irq) static unsigned int evtchn_from_irq(unsigned irq) { + if (unlikely(WARN(irq < 0 || irq >= nr_irqs, "Invalid irq %d!\n", irq))) + return 0; + return info_for_irq(irq)->evtchn; } @@ -405,15 +408,21 @@ static int find_unbound_irq(void) { struct irq_data *data; int irq, res; - int start = get_nr_hw_irqs(); + int bottom = get_nr_hw_irqs(); + int top = nr_irqs-1; - if (start == nr_irqs) + if (bottom == nr_irqs) goto no_irqs; - /* nr_irqs is a magic value. Must not use it.*/ - for (irq = nr_irqs-1; irq > start; irq--) { + /* This loop starts from the top of IRQ space and goes down. + * We need this b/c if we have a PCI device in a Xen PV guest + * we do not have an IO-APIC (though the backend might have them) + * mapped in. To not have a collision of physical IRQs with the Xen + * event channels start at the top of the IRQ space for virtual IRQs. + */ + for (irq = top; irq > bottom; irq--) { data = irq_get_irq_data(irq); - /* only 0->15 have init'd desc; handle irq > 16 */ + /* only 15->0 have init'd desc; handle irq > 16 */ if (!data) break; if (data->chip == &no_irq_chip) @@ -424,7 +433,7 @@ static int find_unbound_irq(void) return irq; } - if (irq == start) + if (irq == bottom) goto no_irqs; res = irq_alloc_desc_at(irq, -1); |