[PATCHv7 25/26] vfio: initialize the virqfd workqueue in VFIO generic code

From: Antonios Motakis
Date: Tue Sep 23 2014 - 10:49:47 EST


Now we have finally completely decoupled virqfd from VFIO_PCI. We can
initialize it from the VFIO generic code, in order to safely use it from
multiple independent VFIO bus drivers.

Signed-off-by: Antonios Motakis <a.motakis@xxxxxxxxxxxxxxxxxxxxxx>
---
drivers/vfio/pci/vfio_pci.c | 8 --------
drivers/vfio/vfio.c | 8 ++++++++
drivers/vfio/virqfd.c | 4 ++--
include/linux/vfio.h | 4 ++--
4 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index f782533..40e176d 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -1034,7 +1034,6 @@ static void vfio_pci_try_bus_reset(struct vfio_pci_device *vdev)
static void __exit vfio_pci_cleanup(void)
{
pci_unregister_driver(&vfio_pci_driver);
- vfio_pci_virqfd_exit();
vfio_pci_uninit_perm_bits();
}

@@ -1047,11 +1046,6 @@ static int __init vfio_pci_init(void)
if (ret)
return ret;

- /* Start the virqfd cleanup handler */
- ret = vfio_pci_virqfd_init();
- if (ret)
- goto out_virqfd;
-
/* Register and scan for devices */
ret = pci_register_driver(&vfio_pci_driver);
if (ret)
@@ -1060,8 +1054,6 @@ static int __init vfio_pci_init(void)
return 0;

out_driver:
- vfio_pci_virqfd_exit();
-out_virqfd:
vfio_pci_uninit_perm_bits();
return ret;
}
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index f018d8d..8e84471 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -1464,6 +1464,11 @@ static int __init vfio_init(void)
if (ret)
goto err_cdev_add;

+ /* Start the virqfd cleanup handler used by some VFIO bus drivers */
+ ret = vfio_virqfd_init();
+ if (ret)
+ goto err_virqfd;
+
pr_info(DRIVER_DESC " version: " DRIVER_VERSION "\n");

/*
@@ -1476,6 +1481,8 @@ static int __init vfio_init(void)

return 0;

+err_virqfd:
+ cdev_del(&vfio.group_cdev);
err_cdev_add:
unregister_chrdev_region(vfio.group_devt, MINORMASK);
err_alloc_chrdev:
@@ -1490,6 +1497,7 @@ static void __exit vfio_cleanup(void)
{
WARN_ON(!list_empty(&vfio.group_list));

+ vfio_virqfd_exit();
idr_destroy(&vfio.group_idr);
cdev_del(&vfio.group_cdev);
unregister_chrdev_region(vfio.group_devt, MINORMASK);
diff --git a/drivers/vfio/virqfd.c b/drivers/vfio/virqfd.c
index ac63ec0..c28882f 100644
--- a/drivers/vfio/virqfd.c
+++ b/drivers/vfio/virqfd.c
@@ -18,7 +18,7 @@
static struct workqueue_struct *vfio_irqfd_cleanup_wq;
static spinlock_t lock;

-int __init vfio_pci_virqfd_init(void)
+int __init vfio_virqfd_init(void)
{
vfio_irqfd_cleanup_wq =
create_singlethread_workqueue("vfio-irqfd-cleanup");
@@ -30,7 +30,7 @@ int __init vfio_pci_virqfd_init(void)
return 0;
}

-void vfio_pci_virqfd_exit(void)
+void vfio_virqfd_exit(void)
{
destroy_workqueue(vfio_irqfd_cleanup_wq);
}
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index ce23a42..9fa02c8 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -140,8 +140,8 @@ struct virqfd {
struct virqfd **pvirqfd;
};

-extern int vfio_pci_virqfd_init(void);
-extern void vfio_pci_virqfd_exit(void);
+extern int vfio_virqfd_init(void);
+extern void vfio_virqfd_exit(void);
extern int virqfd_enable(void *opaque,
int (*handler)(void *, void *),
void (*thread)(void *, void *),
--
1.8.3.2

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