Move the mention of "check-help" up to the intro text and also mention
the meson test integration.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240729144414.830369-7-alex.bennee@linaro.org>

diff --git a/docs/devel/testing.rst b/docs/devel/testing.rst
index 23d3f44f52..b984c5dd26 100644
--- a/docs/devel/testing.rst
+++ b/docs/devel/testing.rst
@@ -3,13 +3,28 @@
 Testing in QEMU
 ===============
 
-This document describes the testing infrastructure in QEMU.
+QEMU's testing infrastructure is fairly complex as it covers
+everything from unit testing and exercising specific sub-systems all
+the way to full blown acceptance tests. To get an overview of the
+tests you can run ``make check-help`` from either the source or build
+tree.
+
+Most (but not all) tests are also integrated into the meson build
+system so can be run directly from the build tree, for example:
+
+.. code::
+
+  [./pyvenv/bin/]meson test --suite qemu:softfloat
+
+will run just the softfloat tests.
+
+The rest of this document will cover the details for specific test
+groups.
 
 Testing with "make check"
 -------------------------
 
-The "make check" testing family includes most of the C based tests in QEMU. For
-a quick help, run ``make check-help`` from the source tree.
+The "make check" testing family includes most of the C based tests in QEMU.
 
 The usual way to run these tests is:
 
-- 
2.39.2