uio: document uio_hv_generic regions

Describe the regions present with uio_hv_generic in documentation for driver API. Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
opendata26 · Jan 10, 2018 · c5702d1 · c5702d1
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commit c5702d1
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diff --git a/Documentation/driver-api/uio-howto.rst b/Documentation/driver-api/uio-howto.rst
@@ -698,6 +698,11 @@ prevents the device from generating further interrupts until the bit is
 cleared. The userspace driver should clear this bit before blocking and
 waiting for more interrupts.
 
+The vmbus device regions are mapped into uio device resources:
+    0) Channel ring buffers: guest to host and host to guest
+    1) Guest to host interrupt signalling pages
+    2) Guest to host monitor page
+
 Further information
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