diff options
| author | Jike Song <jike.song@intel.com> | 2016-12-01 13:20:05 +0800 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2016-12-01 09:38:47 -0700 |
| commit | 22195cbd3451a75abaf30651a61cf85c89061327 (patch) | |
| tree | 9178b97be1c3800c8832adabde709868e452a130 /include | |
| parent | d256459fae4dba66d50850f2d948306503818913 (diff) | |
vfio: vfio_register_notifier: classify iommu notifier
Currently vfio_register_notifier assumes that there is only one
notifier chain, which is in vfio_iommu. However, the user might
also be interested in events other than vfio_iommu, for example,
vfio_group. Refactor vfio_{un}register_notifier implementation
to make it feasible.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: Jike Song <jike.song@intel.com>
[aw: merge with commit 816ca69ea9c7 ("vfio: Fix handling of error returned by 'vfio_group_get_from_dev()'"), remove typedef]
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/vfio.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/include/linux/vfio.h b/include/linux/vfio.h index 15ff0421b423..0e5201f207d3 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -81,6 +81,7 @@ struct vfio_iommu_driver_ops { int (*unpin_pages)(void *iommu_data, unsigned long *user_pfn, int npage); int (*register_notifier)(void *iommu_data, + unsigned long *events, struct notifier_block *nb); int (*unregister_notifier)(void *iommu_data, struct notifier_block *nb); @@ -107,12 +108,20 @@ extern int vfio_pin_pages(struct device *dev, unsigned long *user_pfn, extern int vfio_unpin_pages(struct device *dev, unsigned long *user_pfn, int npage); -#define VFIO_IOMMU_NOTIFY_DMA_UNMAP (1) +/* each type has independent events */ +enum vfio_notify_type { + VFIO_IOMMU_NOTIFY = 0, +}; + +/* events for VFIO_IOMMU_NOTIFY */ +#define VFIO_IOMMU_NOTIFY_DMA_UNMAP BIT(0) extern int vfio_register_notifier(struct device *dev, + enum vfio_notify_type type, + unsigned long *required_events, struct notifier_block *nb); - extern int vfio_unregister_notifier(struct device *dev, + enum vfio_notify_type type, struct notifier_block *nb); /* |