vfio: initialize the virqfd workqueue in VFIO generic code

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@virtualopensystems.com>
Signed-off-by: Baptiste Reynal <b.reynal@virtualopensystems.com>
Reviewed-by: Eric Auger <eric.auger@linaro.org>
Tested-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

diff --git a/drivers/vfio/Makefile b/drivers/vfio/Makefile
index dadf0ca..d798b09 100644 (file)
--- a/drivers/vfio/Makefile
+++ b/drivers/vfio/Makefile
@@ -1,4 +1,6 @@
-obj-$(CONFIG_VFIO) += vfio.o
+vfio_core-y := vfio.o virqfd.o
+
+obj-$(CONFIG_VFIO) += vfio_core.o
 obj-$(CONFIG_VFIO_IOMMU_TYPE1) += vfio_iommu_type1.o
 obj-$(CONFIG_VFIO_IOMMU_SPAPR_TCE) += vfio_iommu_spapr_tce.o
 obj-$(CONFIG_VFIO_SPAPR_EEH) += vfio_spapr_eeh.o

diff --git a/drivers/vfio/pci/Makefile b/drivers/vfio/pci/Makefile
index c7c8644..1310792 100644 (file)
--- a/drivers/vfio/pci/Makefile
+++ b/drivers/vfio/pci/Makefile
@@ -1,5 +1,4 @@
 
-vfio-pci-y := vfio_pci.o vfio_pci_intrs.o vfio_pci_rdwr.o vfio_pci_config.o \
-             ../virqfd.o
+vfio-pci-y := vfio_pci.o vfio_pci_intrs.o vfio_pci_rdwr.o vfio_pci_config.o
 
 obj-$(CONFIG_VFIO_PCI) += vfio-pci.o

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index 668d37c..2f865d0 100644 (file)
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -1030,7 +1030,6 @@ put_devs:
 static void __exit vfio_pci_cleanup(void)
 {
        pci_unregister_driver(&vfio_pci_driver);
-       vfio_virqfd_exit();
        vfio_pci_uninit_perm_bits();
 }
 
@@ -1043,11 +1042,6 @@ static int __init vfio_pci_init(void)
        if (ret)
                return ret;
 
-       /* Start the virqfd cleanup handler */
-       ret = vfio_virqfd_init();
-       if (ret)
-               goto out_virqfd;
-
        /* Register and scan for devices */
        ret = pci_register_driver(&vfio_pci_driver);
        if (ret)
@@ -1056,8 +1050,6 @@ static int __init vfio_pci_init(void)
        return 0;
 
 out_driver:
-       vfio_virqfd_exit();
-out_virqfd:
        vfio_pci_uninit_perm_bits();
        return ret;
 }

diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 4cde855..23ba12a 100644 (file)
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -1553,6 +1553,11 @@ 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");
 
        /*
@@ -1565,6 +1570,8 @@ 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:
@@ -1579,6 +1586,7 @@ 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);