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authorStefano Stabellini <stefano.stabellini@eu.citrix.com>2010-07-01 17:10:39 +0100
committerStefano Stabellini <stefano.stabellini@eu.citrix.com>2010-10-22 21:25:43 +0100
commit809f9267bbaba7765cdb86a47f2e6e4bf4951b69 (patch)
tree5ed0ad8e7f5f535d94927498feefba15c9770e91 /drivers/xen
parent3942b740e5183caad47a4a3fcb37a4509ce7af83 (diff)
downloadop-kernel-dev-809f9267bbaba7765cdb86a47f2e6e4bf4951b69.zip
op-kernel-dev-809f9267bbaba7765cdb86a47f2e6e4bf4951b69.tar.gz
xen: map MSIs into pirqs
Map MSIs into pirqs, writing 0 in the MSI vector data field and the pirq number in the MSI destination id field. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/events.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 32269bc..efa683e 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -656,6 +656,28 @@ out:
return irq;
}
+void xen_allocate_pirq_msi(char *name, int *irq, int *pirq)
+{
+ spin_lock(&irq_mapping_update_lock);
+
+ *irq = find_unbound_irq();
+ if (*irq == -1)
+ goto out;
+
+ *pirq = find_unbound_pirq();
+ if (*pirq == -1)
+ goto out;
+
+ set_irq_chip_and_handler_name(*irq, &xen_pirq_chip,
+ handle_level_irq, name);
+
+ irq_info[*irq] = mk_pirq_info(0, *pirq, 0, 0);
+ pirq_to_irq[*pirq] = *irq;
+
+out:
+ spin_unlock(&irq_mapping_update_lock);
+}
+
int xen_destroy_irq(int irq)
{
struct irq_desc *desc;
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