Messages in this thread Patch in this message | | | Subject | [RFC PATCH 03/10] vfio: Export unmap_mapping_range() wrapper | From | Alex Williamson <> | Date | Mon, 22 Feb 2021 09:50:59 -0700 |
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Allow bus drivers to use vfio pseudo fs mapping to zap all mmaps across a range of their device files.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com> --- drivers/vfio/vfio.c | 7 +++++++ include/linux/vfio.h | 2 ++ 2 files changed, 9 insertions(+)
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c index 067cd843961c..da212425ab30 100644 --- a/drivers/vfio/vfio.c +++ b/drivers/vfio/vfio.c @@ -565,6 +565,13 @@ static struct inode *vfio_fs_inode_new(void) return inode; } +void vfio_device_unmap_mapping_range(struct vfio_device *device, + loff_t start, loff_t len) +{ + unmap_mapping_range(device->inode->i_mapping, start, len, true); +} +EXPORT_SYMBOL_GPL(vfio_device_unmap_mapping_range); + /** * Device objects - create, release, get, put, search */ diff --git a/include/linux/vfio.h b/include/linux/vfio.h index b784463000d4..f435dfca15eb 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -56,6 +56,8 @@ 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 void vfio_device_unmap_mapping_range(struct vfio_device *device, + loff_t start, loff_t len); /* events for the backend driver notify callback */ enum vfio_iommu_notify_type {
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