Documentation: add documentation for sysfs console

Signed-off-by: Ralf Ramsauer <ralf.ramsauer@oth-regensburg.de> Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
siemens · Jan 28, 2017 · 3a24d47 · 3a24d47
1 parent 9747418
commit 3a24d47
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diff --git a/Documentation/debug-output.md b/Documentation/debug-output.md
@@ -84,6 +84,19 @@ Example configuration for disabled debug output (architecture independent):
 }
 ```
 
+Hypervisor Console via sysfs
+----------------------------
+
+If the debug console of root cell has the flag JAILHOUSE_CON2_TYPE_ROOTPAGE
+set, the hypervisor console is available through
+/sys/devices/jailhouse/console.  Continuous reading of the hypervisor console
+is available through /dev/jailhouse.
+
+Example
+```
+cat /dev/jailhouse
+```
+
 Inmates
 -------