On 2020/8/5 下午8:51, Michael S. Tsirkin wrote:

On Wed, Jun 17, 2020 at 11:29:44AM +0800, Jason Wang wrote:

quoted

This patch introduce a config op to get valid iova range from the vDPA
device.

Signed-off-by: Jason Wang<jasowang@redhat.com>
---
  include/linux/vdpa.h | 14 ++++++++++++++
  1 file changed, 14 insertions(+)

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 239db794357c..b7633ed2500c 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h

@@ -41,6 +41,16 @@ struct vdpa_device {
  	unsigned int index;
  };
  
+/**
+ * vDPA IOVA range - the IOVA range support by the device
+ * @start: start of the IOVA range
+ * @end: end of the IOVA range
+ */
+struct vdpa_iova_range {
+	u64 start;
+	u64 end;
+};
+

This is ambiguous. Is end in the range or just behind it?

In the range.

How about first/last?

Sure.

Thanks

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