Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull vhost fixes from Michael Tsirkin:
 "Fixes all over the place.

  A new UAPI is borderline: can also be considered a new feature but
  also seems to be the only way we could come up with to fix addressing
  for userspace - and it seems important to switch to it now before
  userspace making assumptions about addressing ability of devices is
  set in stone"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  vdpasim: allow to assign a MAC address
  vdpasim: fix MAC address configuration
  vdpa: handle irq bypass register failure case
  vdpa_sim: Fix DMA mask
  Revert "vhost-vdpa: fix page pinning leakage in error path"
  vdpa/mlx5: Fix error return in map_direct_mr()
  vhost_vdpa: Return -EFAULT if copy_from_user() fails
  vdpa_sim: implement get_iova_range()
  vhost: vdpa: report iova range
  vdpa: introduce config op to get valid iova range

3 files changed, 28 insertions, 0 deletions

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index eae0bfd87d91..30bc7a7223bb 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -53,6 +53,16 @@ struct vdpa_device {
 };
 
 /**
+ * vDPA IOVA range - the IOVA range support by the device
+ * @first: start of the IOVA range
+ * @last: end of the IOVA range
+ */
+struct vdpa_iova_range {
+	u64 first;
+	u64 last;
+};
+
+/**
  * vDPA_config_ops - operations for configuring a vDPA device.
  * Note: vDPA device drivers are required to implement all of the
  * operations unless it is mentioned to be optional in the following
@@ -151,6 +161,10 @@ struct vdpa_device {
  * @get_generation:		Get device config generation (optional)
  *				@vdev: vdpa device
  *				Returns u32: device generation
+ * @get_iova_range:		Get supported iova range (optional)
+ *				@vdev: vdpa device
+ *				Returns the iova range supported by
+ *				the device.
  * @set_map:			Set device memory mapping (optional)
  *				Needed for device that using device
  *				specific DMA translation (on-chip IOMMU)
@@ -216,6 +230,7 @@ struct vdpa_config_ops {
 	void (*set_config)(struct vdpa_device *vdev, unsigned int offset,
 			   const void *buf, unsigned int len);
 	u32 (*get_generation)(struct vdpa_device *vdev);
+	struct vdpa_iova_range (*get_iova_range)(struct vdpa_device *vdev);
 
 	/* DMA ops */
 	int (*set_map)(struct vdpa_device *vdev, struct vhost_iotlb *iotlb);
diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
index 75232185324a..c998860d7bbc 100644
--- a/include/uapi/linux/vhost.h
+++ b/include/uapi/linux/vhost.h
@@ -146,4 +146,8 @@
 
 /* Set event fd for config interrupt*/
 #define VHOST_VDPA_SET_CONFIG_CALL	_IOW(VHOST_VIRTIO, 0x77, int)
+
+/* Get the valid iova range */
+#define VHOST_VDPA_GET_IOVA_RANGE	_IOR(VHOST_VIRTIO, 0x78, \
+					     struct vhost_vdpa_iova_range)
 #endif
diff --git a/include/uapi/linux/vhost_types.h b/include/uapi/linux/vhost_types.h
index 9a269a88a6ff..f7f6a3a28977 100644
--- a/include/uapi/linux/vhost_types.h
+++ b/include/uapi/linux/vhost_types.h
@@ -138,6 +138,15 @@ struct vhost_vdpa_config {
 	__u8 buf[0];
 };
 
+/* vhost vdpa IOVA range
+ * @first: First address that can be mapped by vhost-vDPA
+ * @last: Last address that can be mapped by vhost-vDPA
+ */
+struct vhost_vdpa_iova_range {
+	__u64 first;
+	__u64 last;
+};
+
 /* Feature bits */
 /* Log all write descriptors. Can be changed while device is active. */
 #define VHOST_F_LOG_ALL 26