diff --git a/MAINTAINERS b/MAINTAINERS
index cb8f3ea2c2..684142e12e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1881,6 +1881,7 @@ virtio-9p
 M: Greg Kurz <groug@kaod.org>
 M: Christian Schoenebeck <qemu_oss@crudebyte.com>
 S: Odd Fixes
+W: https://wiki.qemu.org/Documentation/9p
 F: hw/9pfs/
 X: hw/9pfs/xen-9p*
 F: fsdev/
diff --git a/hw/9pfs/9p-local.c b/hw/9pfs/9p-local.c
index af52c1daac..210d9e7705 100644
--- a/hw/9pfs/9p-local.c
+++ b/hw/9pfs/9p-local.c
@@ -10,6 +10,11 @@
  * the COPYING file in the top-level directory.
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include "9p.h"
 #include "9p-local.h"
diff --git a/hw/9pfs/9p-posix-acl.c b/hw/9pfs/9p-posix-acl.c
index bbf89064f7..eadae270dd 100644
--- a/hw/9pfs/9p-posix-acl.c
+++ b/hw/9pfs/9p-posix-acl.c
@@ -11,6 +11,11 @@
  *
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include "qemu/xattr.h"
 #include "9p.h"
diff --git a/hw/9pfs/9p-proxy.c b/hw/9pfs/9p-proxy.c
index 4aa4e0a3ba..09bd9f1464 100644
--- a/hw/9pfs/9p-proxy.c
+++ b/hw/9pfs/9p-proxy.c
@@ -10,6 +10,11 @@
  * the COPYING file in the top-level directory.
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include <sys/socket.h>
 #include <sys/un.h>
diff --git a/hw/9pfs/9p-synth.c b/hw/9pfs/9p-synth.c
index 473ef914b0..b38088e066 100644
--- a/hw/9pfs/9p-synth.c
+++ b/hw/9pfs/9p-synth.c
@@ -12,6 +12,11 @@
  *
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include "9p.h"
 #include "fsdev/qemu-fsdev.h"
diff --git a/hw/9pfs/9p-util.c b/hw/9pfs/9p-util.c
index 614b7fc34d..3221d9b498 100644
--- a/hw/9pfs/9p-util.c
+++ b/hw/9pfs/9p-util.c
@@ -10,6 +10,11 @@
  * See the COPYING file in the top-level directory.
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include "qemu/xattr.h"
 #include "9p-util.h"
diff --git a/hw/9pfs/9p-xattr-user.c b/hw/9pfs/9p-xattr-user.c
index 2c90817b75..f2ae9582e6 100644
--- a/hw/9pfs/9p-xattr-user.c
+++ b/hw/9pfs/9p-xattr-user.c
@@ -11,6 +11,11 @@
  *
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include "9p.h"
 #include "fsdev/file-op-9p.h"
diff --git a/hw/9pfs/9p-xattr.c b/hw/9pfs/9p-xattr.c
index c696d8f846..9ae69dd8db 100644
--- a/hw/9pfs/9p-xattr.c
+++ b/hw/9pfs/9p-xattr.c
@@ -11,6 +11,11 @@
  *
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include "9p.h"
 #include "fsdev/file-op-9p.h"
diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c
index 134806db52..0fa776af09 100644
--- a/hw/9pfs/9p.c
+++ b/hw/9pfs/9p.c
@@ -11,6 +11,11 @@
  *
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include <glib/gprintf.h>
 #include "hw/virtio/virtio.h"
diff --git a/hw/9pfs/codir.c b/hw/9pfs/codir.c
index 1f70a58df5..032cce04c4 100644
--- a/hw/9pfs/codir.c
+++ b/hw/9pfs/codir.c
@@ -11,6 +11,11 @@
  *
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include "fsdev/qemu-fsdev.h"
 #include "qemu/thread.h"
diff --git a/hw/9pfs/cofile.c b/hw/9pfs/cofile.c
index 83bb6c14e0..20f93a90e7 100644
--- a/hw/9pfs/cofile.c
+++ b/hw/9pfs/cofile.c
@@ -11,6 +11,11 @@
  *
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include "fsdev/qemu-fsdev.h"
 #include "qemu/thread.h"
diff --git a/hw/9pfs/cofs.c b/hw/9pfs/cofs.c
index 0b321b456e..9d0adc2e78 100644
--- a/hw/9pfs/cofs.c
+++ b/hw/9pfs/cofs.c
@@ -11,6 +11,11 @@
  *
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include "fsdev/qemu-fsdev.h"
 #include "qemu/thread.h"
diff --git a/hw/9pfs/coth.c b/hw/9pfs/coth.c
index 9778f24b00..2802d41cce 100644
--- a/hw/9pfs/coth.c
+++ b/hw/9pfs/coth.c
@@ -12,6 +12,11 @@
  *
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include "block/thread-pool.h"
 #include "qemu/coroutine.h"
diff --git a/hw/9pfs/coxattr.c b/hw/9pfs/coxattr.c
index 0e00ffaa0d..dbcd09e0fd 100644
--- a/hw/9pfs/coxattr.c
+++ b/hw/9pfs/coxattr.c
@@ -11,6 +11,11 @@
  *
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include "fsdev/qemu-fsdev.h"
 #include "qemu/thread.h"
diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
index 14371a78ef..54ee93b71f 100644
--- a/hw/9pfs/virtio-9p-device.c
+++ b/hw/9pfs/virtio-9p-device.c
@@ -11,6 +11,11 @@
  *
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include "hw/virtio/virtio.h"
 #include "qemu/sockets.h"
diff --git a/hw/9pfs/xen-9p-backend.c b/hw/9pfs/xen-9p-backend.c
index a969fcc54c..65c4979c3c 100644
--- a/hw/9pfs/xen-9p-backend.c
+++ b/hw/9pfs/xen-9p-backend.c
@@ -8,6 +8,11 @@
  *
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 
 #include "hw/9pfs/9p.h"
diff --git a/tests/qtest/libqos/virtio-9p.c b/tests/qtest/libqos/virtio-9p.c
index be91662c6f..b4e1143288 100644
--- a/tests/qtest/libqos/virtio-9p.c
+++ b/tests/qtest/libqos/virtio-9p.c
@@ -16,6 +16,11 @@
  * License along with this library; if not, see <http://www.gnu.org/licenses/>
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include "libqtest.h"
 #include "qemu/module.h"
diff --git a/tests/qtest/virtio-9p-test.c b/tests/qtest/virtio-9p-test.c
index 92a498f249..41fed41de1 100644
--- a/tests/qtest/virtio-9p-test.c
+++ b/tests/qtest/virtio-9p-test.c
@@ -7,6 +7,11 @@
  * See the COPYING file in the top-level directory.
  */
 
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
 #include "qemu/osdep.h"
 #include "libqtest-single.h"
 #include "qemu/module.h"