Add HAL integration to support input hot plug.

 * vmmouse_detect: A simple program that detects whether a vmmouse
   device is present.
 * hal-probe-vmmouse: A HAL callout script that uses vmmouse_detect
   and overrides input.x11_driver.
 * 11-x11-vmmouse.fdi: fdi descriptor that adds the callout for PS/2
   mice.

Additional 'configure' variables have been added to allow for overriding
HAL paths, although this shouldn't usually be necessary.

1 files changed, 13 insertions, 0 deletions

diff --git a/README b/README
index 1e9e762..4205876 100644
--- a/README
+++ b/README
@@ -51,3 +51,16 @@ The driver is composed of three different layers:
      are still transmitted on the PS/2 port so it is necessary
      to be set up to receive those interrupts like a standard
      PS/2 driver, but the actual data on the PS/2 port is ignored.
+
+vmmouse_detect
+--------------
+
+A simple program to detect whether the vmmouse device is present.
+It is used by the HAL callout script to automatically detect a
+vmmouse device.
+
+Returns 0 if we are running in a virtual machine where the vmmouse
+device is present.
+
+Returns 1 otherwise (either we are not in a VM or the vmmouse device
+was disabled).