diff mbox series

[RFC,1/5] vfio: Add a helper to retrieve kvm instance from a dev

Message ID 20210222155338.26132-2-shameerali.kolothum.thodi@huawei.com (mailing list archive)
State New, archived
Headers show
Series KVM/ARM64 Add support for pinned VMIDs | expand

Commit Message

Shameerali Kolothum Thodi Feb. 22, 2021, 3:53 p.m. UTC 
A device that belongs to vfio_group has the kvm instance associated
with it. Retrieve it.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
 drivers/vfio/vfio.c  | 12 ++++++++++++
 include/linux/vfio.h |  1 +
 2 files changed, 13 insertions(+)
diff mbox series

Patch

diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 2151bc7f87ab..d1968e4bf9f4 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -876,6 +876,18 @@  struct vfio_device *vfio_device_get_from_dev(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(vfio_device_get_from_dev);
 
+struct kvm *vfio_kvm_get_from_dev(struct device *dev)
+{
+	struct vfio_group *group;
+
+	group = vfio_group_get_from_dev(dev);
+	if (!group)
+		return NULL;
+
+	return group->kvm;
+}
+EXPORT_SYMBOL_GPL(vfio_kvm_get_from_dev);
+
 static struct vfio_device *vfio_device_get_from_name(struct vfio_group *group,
 						     char *buf)
 {
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 38d3c6a8dc7e..8716298fee27 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -56,6 +56,7 @@  extern void *vfio_del_group_dev(struct device *dev);
 extern struct vfio_device *vfio_device_get_from_dev(struct device *dev);
 extern void vfio_device_put(struct vfio_device *device);
 extern void *vfio_device_data(struct vfio_device *device);
+extern struct kvm *vfio_kvm_get_from_dev(struct device *dev);
 
 /**
  * struct vfio_iommu_driver_ops - VFIO IOMMU driver callbacks