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Commit 6278f55b authored by Gustavo Romero's avatar Gustavo Romero Committed by Michael Ellerman
Browse files

powerpc: Document xmon options 



Document all options currently supported by xmon debugger.

Signed-off-by: default avatarGustavo Romero <gromero@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190814205638.25322-1-gromero@linux.ibm.com
parent 27d4396e

Documentation/admin-guide/kernel-parameters.txt

+19 −0
Original line number Diff line number Diff line
@@ -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.