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path: root/drivers/xen/events/events_base.c
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Diffstat (limited to 'drivers/xen/events/events_base.c')
-rw-r--r--drivers/xen/events/events_base.c47
1 files changed, 32 insertions, 15 deletions
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index 9875d6ec1063..793053065629 100644
--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -391,10 +391,10 @@ static void xen_irq_init(unsigned irq)
list_add_tail(&info->list, &xen_irq_list_head);
}
-static int __must_check xen_allocate_irq_dynamic(void)
+static int __must_check xen_allocate_irqs_dynamic(int nvec)
{
int first = 0;
- int irq;
+ int i, irq;
#ifdef CONFIG_X86_IO_APIC
/*
@@ -408,14 +408,22 @@ static int __must_check xen_allocate_irq_dynamic(void)
first = get_nr_irqs_gsi();
#endif
- irq = irq_alloc_desc_from(first, -1);
+ irq = irq_alloc_descs_from(first, nvec, -1);
- if (irq >= 0)
- xen_irq_init(irq);
+ if (irq >= 0) {
+ for (i = 0; i < nvec; i++)
+ xen_irq_init(irq + i);
+ }
return irq;
}
+static inline int __must_check xen_allocate_irq_dynamic(void)
+{
+
+ return xen_allocate_irqs_dynamic(1);
+}
+
static int __must_check xen_allocate_irq_gsi(unsigned gsi)
{
int irq;
@@ -738,22 +746,25 @@ int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc)
}
int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
- int pirq, const char *name, domid_t domid)
+ int pirq, int nvec, const char *name, domid_t domid)
{
- int irq, ret;
+ int i, irq, ret;
mutex_lock(&irq_mapping_update_lock);
- irq = xen_allocate_irq_dynamic();
+ irq = xen_allocate_irqs_dynamic(nvec);
if (irq < 0)
goto out;
- irq_set_chip_and_handler_name(irq, &xen_pirq_chip, handle_edge_irq,
- name);
+ for (i = 0; i < nvec; i++) {
+ irq_set_chip_and_handler_name(irq + i, &xen_pirq_chip, handle_edge_irq, name);
+
+ ret = xen_irq_info_pirq_setup(irq + i, 0, pirq + i, 0, domid,
+ i == 0 ? 0 : PIRQ_MSI_GROUP);
+ if (ret < 0)
+ goto error_irq;
+ }
- ret = xen_irq_info_pirq_setup(irq, 0, pirq, 0, domid, 0);
- if (ret < 0)
- goto error_irq;
ret = irq_set_msi_desc(irq, msidesc);
if (ret < 0)
goto error_irq;
@@ -761,7 +772,8 @@ out:
mutex_unlock(&irq_mapping_update_lock);
return irq;
error_irq:
- __unbind_from_irq(irq);
+ for (; i >= 0; i--)
+ __unbind_from_irq(irq + i);
mutex_unlock(&irq_mapping_update_lock);
return ret;
}
@@ -780,7 +792,12 @@ int xen_destroy_irq(int irq)
if (!desc)
goto out;
- if (xen_initial_domain()) {
+ /*
+ * If trying to remove a vector in a MSI group different
+ * than the first one skip the PIRQ unmap unless this vector
+ * is the first one in the group.
+ */
+ if (xen_initial_domain() && !(info->u.pirq.flags & PIRQ_MSI_GROUP)) {
unmap_irq.pirq = info->u.pirq.pirq;
unmap_irq.domid = info->u.pirq.domid;
rc = HYPERVISOR_physdev_op(PHYSDEVOP_unmap_pirq, &unmap_irq);