docs: document ~/control/sysrq

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>

diff --git a/docs/misc/xenstore-paths.markdown b/docs/misc/xenstore-paths.markdown
index 60c8b3fbe5b13380e50249be1e77874b6c4e0a89..33d281915c3a5d06311fd7a788d850e37e50d551 100644 (file)
--- a/docs/misc/xenstore-paths.markdown
+++ b/docs/misc/xenstore-paths.markdown
@@ -410,6 +410,14 @@ by udev ("0") or will be run by the toolstack directly ("1").
 
 ### Platform Feature and Control Paths
 
+#### ~/control/sysrq = (""|COMMAND) [w]
+
+This is the PV SysRq control node. A toolstack can write a single character
+representing a magic SysRq key understood by the Linux kernel.  The guest
+acknowledges a request by writing the empty string back to the command node.
+
+This protocol is Linux only.
+
 #### ~/control/shutdown = (""|COMMAND) [w]
 
 This is the PV shutdown control node. A toolstack can write various