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| author | Gustavo Romero <gromero@linux.ibm.com> | 2019-08-14 15:56:37 -0500 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-08-22 23:12:47 +1000 |
| commit | 6278f55ba5ed20f486ea2049da0cf9a9c1d9a5d5 (patch) | |
| tree | b77f4bc7ee35ae101cc23d27f5abccfcb18b0e83 /Documentation/admin-guide/kernel-parameters.txt | |
| parent | 27d4396ed5a1c70f894557fd5732725eb1d94542 (diff) | |
| download | lwn-6278f55ba5ed20f486ea2049da0cf9a9c1d9a5d5.tar.gz lwn-6278f55ba5ed20f486ea2049da0cf9a9c1d9a5d5.zip | |
powerpc: Document xmon options
Document all options currently supported by xmon debugger.
Signed-off-by: Gustavo Romero <gromero@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190814205638.25322-1-gromero@linux.ibm.com
Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.txt')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 19 |
1 files changed, 19 insertions, 0 deletions
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. |