This patch adds the registration/unregistration of an
irq_bypass_producer for MSI/MSIx on vfio pci devices.
Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx>
---
drivers/vfio/pci/vfio_pci_intrs.c | 8 ++++++--
drivers/vfio/pci/vfio_pci_private.h | 2 ++
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c
index 4e053be..6e86292 100644
--- a/drivers/vfio/pci/vfio_pci_intrs.c
+++ b/drivers/vfio/pci/vfio_pci_intrs.c
@@ -322,7 +322,7 @@ static int vfio_msi_set_vector_signal(struct vfio_pci_device *vdev,
if (vdev->ctx[vector].trigger) {
free_irq(irq, vdev->ctx[vector].trigger);
- /* irq_bypass_unregister_producer(); */
+ irq_bypass_unregister_producer(&vdev->ctx[vector].producer);
kfree(vdev->ctx[vector].name);
eventfd_ctx_put(vdev->ctx[vector].trigger);
vdev->ctx[vector].trigger = NULL;
@@ -364,7 +364,11 @@ static int vfio_msi_set_vector_signal(struct vfio_pci_device *vdev,
return ret;
}
- /* irq_bypass_register_producer(); */
+ INIT_LIST_HEAD(&vdev->ctx[vector].producer.node);
+ vdev->ctx[vector].producer.token = trigger;
+ vdev->ctx[vector].producer.irq = irq;
+ ret = irq_bypass_register_producer(&vdev->ctx[vector].producer);
+ WARN_ON(ret);
vdev->ctx[vector].trigger = trigger;
diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h
index ae0e1b4..0e7394f 100644
--- a/drivers/vfio/pci/vfio_pci_private.h
+++ b/drivers/vfio/pci/vfio_pci_private.h
@@ -13,6 +13,7 @@
#include <linux/mutex.h>
#include <linux/pci.h>
+#include <linux/irqbypass.h>
#ifndef VFIO_PCI_PRIVATE_H
#define VFIO_PCI_PRIVATE_H
@@ -29,6 +30,7 @@ struct vfio_pci_irq_ctx {
struct virqfd *mask;
char *name;
bool masked;
+ struct irq_bypass_producer producer;
};
struct vfio_pci_device {
--
2.1.0
--
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