[RFC PATCH 1/5] vfio: Add a helper to retrieve kvm instance from a dev
From: Shameer Kolothum <hidden>
Date: 2021-02-22 15:56:06
Also in:
linux-arm-kernel, linux-iommu
Subsystem:
the rest, vfio driver · Maintainers:
Linus Torvalds, Alex Williamson
A device that belongs to vfio_group has the kvm instance associated with it. Retrieve it. Signed-off-by: Shameer Kolothum <redacted> --- drivers/vfio/vfio.c | 12 ++++++++++++ include/linux/vfio.h | 1 + 2 files changed, 13 insertions(+)
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
--
2.17.1
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