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-rw-r--r--Documentation/driver-api/uio-howto.rst5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/driver-api/uio-howto.rst b/Documentation/driver-api/uio-howto.rst
index 3a0d3f5f5c53..968f4c21c733 100644
--- 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
===================