Document all options currently supported by xmon debugger.
Signed-off-by: Gustavo Romero
---
.../admin-guide/kernel-parameters.txt | 19 +++
1 file changed, 19 insertions(+)
diff --git a/Documentation/admin-guide/kernel-parameters.txt
b/Documentation/admin-guide/kernel-parameters.txt
index 7ccd158b3894..6d495aab4d0b 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5305,3 +5305,22 @@
A hex value specifying bitmask with supplemental xhci
host controller quirks. Meaning of each bit can be
consulted in header drivers/usb/host/xhci.h.
+
+ xmon[PPC]
+ Format: { early | on | rw | ro | off }
+ Controls if xmon debugger is enabled. Default is off.
+ Passing only "xmon" is equivalent to "xmon=early".
+ early Call xmon as early as possible on boot; xmon
+ debugger is called from setup_arch().
+ on xmon debugger hooks will be installed so xmon
+ is only called on a kernel crash. Default mode,
+ i.e. either "ro" or "rw" mode, is controlled
+ with CONFIG_XMON_DEFAULT_RO_MODE.
+ rw xmon debugger hooks will be installed so xmon
+ is called only on a kernel crash, mode is write,
+ meaning SPR registers, memory and, other data
+ can be written using xmon commands.
+ ro same as "rw" option above but SPR registers,
+ memory, and other data can't be written using
+ xmon commands.
+ off xmon is disabled.
--
2.17.1
