docs/conf.py: Enable use of kerneldoc sphinx extension

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20190521122519.12573-4-peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

docs/conf.py

@@ -54,7 +54,7 @@
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ['qmp_lexer']
+extensions = ['kerneldoc', 'qmp_lexer']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
@@ -216,3 +216,8 @@
 
 
 
+# We use paths starting from qemu_docdir here so that you can run
+# sphinx-build from anywhere and the kerneldoc extension can still
+# find everything.
+kerneldoc_bin = os.path.join(qemu_docdir, '../scripts/kernel-doc')
+kerneldoc_srctree = os.path.join(qemu_docdir, '..')