cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
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watchdog-parameters.rst (18233B)

      1==========================
      2WatchDog Module Parameters
      3==========================
      4
      5This file provides information on the module parameters of many of
      6the Linux watchdog drivers.  Watchdog driver parameter specs should
      7be listed here unless the driver has its own driver-specific information
      8file.
      9
     10See Documentation/admin-guide/kernel-parameters.rst for information on
     11providing kernel parameters for builtin drivers versus loadable
     12modules.
     13
     14-------------------------------------------------
     15
     16watchdog core:
     17    open_timeout:
     18	Maximum time, in seconds, for which the watchdog framework will take
     19	care of pinging a running hardware watchdog until userspace opens the
     20	corresponding /dev/watchdogN device. A value of 0 means an infinite
     21	timeout. Setting this to a non-zero value can be useful to ensure that
     22	either userspace comes up properly, or the board gets reset and allows
     23	fallback logic in the bootloader to try something else.
     24
     25-------------------------------------------------
     26
     27acquirewdt:
     28    wdt_stop:
     29	Acquire WDT 'stop' io port (default 0x43)
     30    wdt_start:
     31	Acquire WDT 'start' io port (default 0x443)
     32    nowayout:
     33	Watchdog cannot be stopped once started
     34	(default=kernel config parameter)
     35
     36-------------------------------------------------
     37
     38advantechwdt:
     39    wdt_stop:
     40	Advantech WDT 'stop' io port (default 0x443)
     41    wdt_start:
     42	Advantech WDT 'start' io port (default 0x443)
     43    timeout:
     44	Watchdog timeout in seconds. 1<= timeout <=63, default=60.
     45    nowayout:
     46	Watchdog cannot be stopped once started
     47	(default=kernel config parameter)
     48
     49-------------------------------------------------
     50
     51alim1535_wdt:
     52    timeout:
     53	Watchdog timeout in seconds. (0 < timeout < 18000, default=60
     54    nowayout:
     55	Watchdog cannot be stopped once started
     56	(default=kernel config parameter)
     57
     58-------------------------------------------------
     59
     60alim7101_wdt:
     61    timeout:
     62	Watchdog timeout in seconds. (1<=timeout<=3600, default=30
     63    use_gpio:
     64	Use the gpio watchdog (required by old cobalt boards).
     65	default=0/off/no
     66    nowayout:
     67	Watchdog cannot be stopped once started
     68	(default=kernel config parameter)
     69
     70-------------------------------------------------
     71
     72ar7_wdt:
     73    margin:
     74	Watchdog margin in seconds (default=60)
     75    nowayout:
     76	Disable watchdog shutdown on close
     77	(default=kernel config parameter)
     78
     79-------------------------------------------------
     80
     81armada_37xx_wdt:
     82    timeout:
     83	Watchdog timeout in seconds. (default=120)
     84    nowayout:
     85	Disable watchdog shutdown on close
     86	(default=kernel config parameter)
     87
     88-------------------------------------------------
     89
     90at91rm9200_wdt:
     91    wdt_time:
     92	Watchdog time in seconds. (default=5)
     93    nowayout:
     94	Watchdog cannot be stopped once started
     95	(default=kernel config parameter)
     96
     97-------------------------------------------------
     98
     99at91sam9_wdt:
    100    heartbeat:
    101	Watchdog heartbeats in seconds. (default = 15)
    102    nowayout:
    103	Watchdog cannot be stopped once started
    104	(default=kernel config parameter)
    105
    106-------------------------------------------------
    107
    108bcm47xx_wdt:
    109    wdt_time:
    110	Watchdog time in seconds. (default=30)
    111    nowayout:
    112	Watchdog cannot be stopped once started
    113	(default=kernel config parameter)
    114
    115-------------------------------------------------
    116
    117coh901327_wdt:
    118    margin:
    119	Watchdog margin in seconds (default 60s)
    120
    121-------------------------------------------------
    122
    123cpu5wdt:
    124    port:
    125	base address of watchdog card, default is 0x91
    126    verbose:
    127	be verbose, default is 0 (no)
    128    ticks:
    129	count down ticks, default is 10000
    130
    131-------------------------------------------------
    132
    133cpwd:
    134    wd0_timeout:
    135	Default watchdog0 timeout in 1/10secs
    136    wd1_timeout:
    137	Default watchdog1 timeout in 1/10secs
    138    wd2_timeout:
    139	Default watchdog2 timeout in 1/10secs
    140
    141-------------------------------------------------
    142
    143da9052wdt:
    144    timeout:
    145	Watchdog timeout in seconds. 2<= timeout <=131, default=2.048s
    146    nowayout:
    147	Watchdog cannot be stopped once started
    148	(default=kernel config parameter)
    149
    150-------------------------------------------------
    151
    152davinci_wdt:
    153    heartbeat:
    154	Watchdog heartbeat period in seconds from 1 to 600, default 60
    155
    156-------------------------------------------------
    157
    158ebc-c384_wdt:
    159    timeout:
    160	Watchdog timeout in seconds. (1<=timeout<=15300, default=60)
    161    nowayout:
    162	Watchdog cannot be stopped once started
    163
    164-------------------------------------------------
    165
    166ep93xx_wdt:
    167    nowayout:
    168	Watchdog cannot be stopped once started
    169    timeout:
    170	Watchdog timeout in seconds. (1<=timeout<=3600, default=TBD)
    171
    172-------------------------------------------------
    173
    174eurotechwdt:
    175    nowayout:
    176	Watchdog cannot be stopped once started
    177	(default=kernel config parameter)
    178    io:
    179	Eurotech WDT io port (default=0x3f0)
    180    irq:
    181	Eurotech WDT irq (default=10)
    182    ev:
    183	Eurotech WDT event type (default is `int`)
    184
    185-------------------------------------------------
    186
    187gef_wdt:
    188    nowayout:
    189	Watchdog cannot be stopped once started
    190	(default=kernel config parameter)
    191
    192-------------------------------------------------
    193
    194geodewdt:
    195    timeout:
    196	Watchdog timeout in seconds. 1<= timeout <=131, default=60.
    197    nowayout:
    198	Watchdog cannot be stopped once started
    199	(default=kernel config parameter)
    200
    201-------------------------------------------------
    202
    203i6300esb:
    204    heartbeat:
    205	Watchdog heartbeat in seconds. (1<heartbeat<2046, default=30)
    206    nowayout:
    207	Watchdog cannot be stopped once started
    208	(default=kernel config parameter)
    209
    210-------------------------------------------------
    211
    212iTCO_wdt:
    213    heartbeat:
    214	Watchdog heartbeat in seconds.
    215	(2<heartbeat<39 (TCO v1) or 613 (TCO v2), default=30)
    216    nowayout:
    217	Watchdog cannot be stopped once started
    218	(default=kernel config parameter)
    219
    220-------------------------------------------------
    221
    222iTCO_vendor_support:
    223    vendorsupport:
    224	iTCO vendor specific support mode, default=0 (none),
    225	1=SuperMicro Pent3, 2=SuperMicro Pent4+, 911=Broken SMI BIOS
    226
    227-------------------------------------------------
    228
    229ib700wdt:
    230    timeout:
    231	Watchdog timeout in seconds. 0<= timeout <=30, default=30.
    232    nowayout:
    233	Watchdog cannot be stopped once started
    234	(default=kernel config parameter)
    235
    236-------------------------------------------------
    237
    238ibmasr:
    239    nowayout:
    240	Watchdog cannot be stopped once started
    241	(default=kernel config parameter)
    242
    243-------------------------------------------------
    244
    245imx2_wdt:
    246    timeout:
    247	Watchdog timeout in seconds (default 60 s)
    248    nowayout:
    249	Watchdog cannot be stopped once started
    250	(default=kernel config parameter)
    251
    252-------------------------------------------------
    253
    254indydog:
    255    nowayout:
    256	Watchdog cannot be stopped once started
    257	(default=kernel config parameter)
    258
    259-------------------------------------------------
    260
    261iop_wdt:
    262    nowayout:
    263	Watchdog cannot be stopped once started
    264	(default=kernel config parameter)
    265
    266-------------------------------------------------
    267
    268it8712f_wdt:
    269    margin:
    270	Watchdog margin in seconds (default 60)
    271    nowayout:
    272	Disable watchdog shutdown on close
    273	(default=kernel config parameter)
    274
    275-------------------------------------------------
    276
    277it87_wdt:
    278    nogameport:
    279	Forbid the activation of game port, default=0
    280    nocir:
    281	Forbid the use of CIR (workaround for some buggy setups); set to 1 if
    282system resets despite watchdog daemon running, default=0
    283    exclusive:
    284	Watchdog exclusive device open, default=1
    285    timeout:
    286	Watchdog timeout in seconds, default=60
    287    testmode:
    288	Watchdog test mode (1 = no reboot), default=0
    289    nowayout:
    290	Watchdog cannot be stopped once started
    291	(default=kernel config parameter)
    292
    293-------------------------------------------------
    294
    295ixp4xx_wdt:
    296    heartbeat:
    297	Watchdog heartbeat in seconds (default 60s)
    298    nowayout:
    299	Watchdog cannot be stopped once started
    300	(default=kernel config parameter)
    301
    302-------------------------------------------------
    303
    304machzwd:
    305    nowayout:
    306	Watchdog cannot be stopped once started
    307	(default=kernel config parameter)
    308    action:
    309	after watchdog resets, generate:
    310	0 = RESET(*)  1 = SMI  2 = NMI  3 = SCI
    311
    312-------------------------------------------------
    313
    314max63xx_wdt:
    315    heartbeat:
    316	Watchdog heartbeat period in seconds from 1 to 60, default 60
    317    nowayout:
    318	Watchdog cannot be stopped once started
    319	(default=kernel config parameter)
    320    nodelay:
    321	Force selection of a timeout setting without initial delay
    322	(max6373/74 only, default=0)
    323
    324-------------------------------------------------
    325
    326mixcomwd:
    327    nowayout:
    328	Watchdog cannot be stopped once started
    329	(default=kernel config parameter)
    330
    331-------------------------------------------------
    332
    333mpc8xxx_wdt:
    334    timeout:
    335	Watchdog timeout in ticks. (0<timeout<65536, default=65535)
    336    reset:
    337	Watchdog Interrupt/Reset Mode. 0 = interrupt, 1 = reset
    338    nowayout:
    339	Watchdog cannot be stopped once started
    340	(default=kernel config parameter)
    341
    342-------------------------------------------------
    343
    344mv64x60_wdt:
    345    nowayout:
    346	Watchdog cannot be stopped once started
    347	(default=kernel config parameter)
    348
    349-------------------------------------------------
    350
    351ni903x_wdt:
    352    timeout:
    353	Initial watchdog timeout in seconds (0<timeout<516, default=60)
    354    nowayout:
    355	Watchdog cannot be stopped once started
    356	(default=kernel config parameter)
    357
    358-------------------------------------------------
    359
    360nic7018_wdt:
    361    timeout:
    362	Initial watchdog timeout in seconds (0<timeout<464, default=80)
    363    nowayout:
    364	Watchdog cannot be stopped once started
    365	(default=kernel config parameter)
    366
    367-------------------------------------------------
    368
    369omap_wdt:
    370    timer_margin:
    371	initial watchdog timeout (in seconds)
    372    early_enable:
    373	Watchdog is started on module insertion (default=0
    374    nowayout:
    375	Watchdog cannot be stopped once started
    376	(default=kernel config parameter)
    377
    378-------------------------------------------------
    379
    380orion_wdt:
    381    heartbeat:
    382	Initial watchdog heartbeat in seconds
    383    nowayout:
    384	Watchdog cannot be stopped once started
    385	(default=kernel config parameter)
    386
    387-------------------------------------------------
    388
    389pc87413_wdt:
    390    io:
    391	pc87413 WDT I/O port (default: io).
    392    timeout:
    393	Watchdog timeout in minutes (default=timeout).
    394    nowayout:
    395	Watchdog cannot be stopped once started
    396	(default=kernel config parameter)
    397
    398-------------------------------------------------
    399
    400pika_wdt:
    401    heartbeat:
    402	Watchdog heartbeats in seconds. (default = 15)
    403    nowayout:
    404	Watchdog cannot be stopped once started
    405	(default=kernel config parameter)
    406
    407-------------------------------------------------
    408
    409pnx4008_wdt:
    410    heartbeat:
    411	Watchdog heartbeat period in seconds from 1 to 60, default 19
    412    nowayout:
    413	Set to 1 to keep watchdog running after device release
    414
    415-------------------------------------------------
    416
    417pnx833x_wdt:
    418    timeout:
    419	Watchdog timeout in Mhz. (68Mhz clock), default=2040000000 (30 seconds)
    420    nowayout:
    421	Watchdog cannot be stopped once started
    422	(default=kernel config parameter)
    423    start_enabled:
    424	Watchdog is started on module insertion (default=1)
    425
    426-------------------------------------------------
    427
    428rc32434_wdt:
    429    timeout:
    430	Watchdog timeout value, in seconds (default=20)
    431    nowayout:
    432	Watchdog cannot be stopped once started
    433	(default=kernel config parameter)
    434
    435-------------------------------------------------
    436
    437riowd:
    438    riowd_timeout:
    439	Watchdog timeout in minutes (default=1)
    440
    441-------------------------------------------------
    442
    443s3c2410_wdt:
    444    tmr_margin:
    445	Watchdog tmr_margin in seconds. (default=15)
    446    tmr_atboot:
    447	Watchdog is started at boot time if set to 1, default=0
    448    nowayout:
    449	Watchdog cannot be stopped once started
    450	(default=kernel config parameter)
    451    soft_noboot:
    452	Watchdog action, set to 1 to ignore reboots, 0 to reboot
    453    debug:
    454	Watchdog debug, set to >1 for debug, (default 0)
    455
    456-------------------------------------------------
    457
    458sa1100_wdt:
    459    margin:
    460	Watchdog margin in seconds (default 60s)
    461
    462-------------------------------------------------
    463
    464sb_wdog:
    465    timeout:
    466	Watchdog timeout in microseconds (max/default 8388607 or 8.3ish secs)
    467
    468-------------------------------------------------
    469
    470sbc60xxwdt:
    471    wdt_stop:
    472	SBC60xx WDT 'stop' io port (default 0x45)
    473    wdt_start:
    474	SBC60xx WDT 'start' io port (default 0x443)
    475    timeout:
    476	Watchdog timeout in seconds. (1<=timeout<=3600, default=30)
    477    nowayout:
    478	Watchdog cannot be stopped once started
    479	(default=kernel config parameter)
    480
    481-------------------------------------------------
    482
    483sbc7240_wdt:
    484    timeout:
    485	Watchdog timeout in seconds. (1<=timeout<=255, default=30)
    486    nowayout:
    487	Disable watchdog when closing device file
    488
    489-------------------------------------------------
    490
    491sbc8360:
    492    timeout:
    493	Index into timeout table (0-63) (default=27 (60s))
    494    nowayout:
    495	Watchdog cannot be stopped once started
    496	(default=kernel config parameter)
    497
    498-------------------------------------------------
    499
    500sbc_epx_c3:
    501    nowayout:
    502	Watchdog cannot be stopped once started
    503	(default=kernel config parameter)
    504
    505-------------------------------------------------
    506
    507sbc_fitpc2_wdt:
    508    margin:
    509	Watchdog margin in seconds (default 60s)
    510    nowayout:
    511	Watchdog cannot be stopped once started
    512
    513-------------------------------------------------
    514
    515sbsa_gwdt:
    516    timeout:
    517	Watchdog timeout in seconds. (default 10s)
    518    action:
    519	Watchdog action at the first stage timeout,
    520	set to 0 to ignore, 1 to panic. (default=0)
    521    nowayout:
    522	Watchdog cannot be stopped once started
    523	(default=kernel config parameter)
    524
    525-------------------------------------------------
    526
    527sc1200wdt:
    528    isapnp:
    529	When set to 0 driver ISA PnP support will be disabled (default=1)
    530    io:
    531	io port
    532    timeout:
    533	range is 0-255 minutes, default is 1
    534    nowayout:
    535	Watchdog cannot be stopped once started
    536	(default=kernel config parameter)
    537
    538-------------------------------------------------
    539
    540sc520_wdt:
    541    timeout:
    542	Watchdog timeout in seconds. (1 <= timeout <= 3600, default=30)
    543    nowayout:
    544	Watchdog cannot be stopped once started
    545	(default=kernel config parameter)
    546
    547-------------------------------------------------
    548
    549sch311x_wdt:
    550    force_id:
    551	Override the detected device ID
    552    therm_trip:
    553	Should a ThermTrip trigger the reset generator
    554    timeout:
    555	Watchdog timeout in seconds. 1<= timeout <=15300, default=60
    556    nowayout:
    557	Watchdog cannot be stopped once started
    558	(default=kernel config parameter)
    559
    560-------------------------------------------------
    561
    562scx200_wdt:
    563    margin:
    564	Watchdog margin in seconds
    565    nowayout:
    566	Disable watchdog shutdown on close
    567
    568-------------------------------------------------
    569
    570shwdt:
    571    clock_division_ratio:
    572	Clock division ratio. Valid ranges are from 0x5 (1.31ms)
    573	to 0x7 (5.25ms). (default=7)
    574    heartbeat:
    575	Watchdog heartbeat in seconds. (1 <= heartbeat <= 3600, default=30
    576    nowayout:
    577	Watchdog cannot be stopped once started
    578	(default=kernel config parameter)
    579
    580-------------------------------------------------
    581
    582smsc37b787_wdt:
    583    timeout:
    584	range is 1-255 units, default is 60
    585    nowayout:
    586	Watchdog cannot be stopped once started
    587	(default=kernel config parameter)
    588
    589-------------------------------------------------
    590
    591softdog:
    592    soft_margin:
    593	Watchdog soft_margin in seconds.
    594	(0 < soft_margin < 65536, default=60)
    595    nowayout:
    596	Watchdog cannot be stopped once started
    597	(default=kernel config parameter)
    598    soft_noboot:
    599	Softdog action, set to 1 to ignore reboots, 0 to reboot
    600	(default=0)
    601
    602-------------------------------------------------
    603
    604stmp3xxx_wdt:
    605    heartbeat:
    606	Watchdog heartbeat period in seconds from 1 to 4194304, default 19
    607
    608-------------------------------------------------
    609
    610tegra_wdt:
    611    heartbeat:
    612	Watchdog heartbeats in seconds. (default = 120)
    613    nowayout:
    614	Watchdog cannot be stopped once started
    615	(default=kernel config parameter)
    616
    617-------------------------------------------------
    618
    619ts72xx_wdt:
    620    timeout:
    621	Watchdog timeout in seconds. (1 <= timeout <= 8, default=8)
    622    nowayout:
    623	Disable watchdog shutdown on close
    624
    625-------------------------------------------------
    626
    627twl4030_wdt:
    628    nowayout:
    629	Watchdog cannot be stopped once started
    630	(default=kernel config parameter)
    631
    632-------------------------------------------------
    633
    634txx9wdt:
    635    timeout:
    636	Watchdog timeout in seconds. (0<timeout<N, default=60)
    637    nowayout:
    638	Watchdog cannot be stopped once started
    639	(default=kernel config parameter)
    640
    641-------------------------------------------------
    642
    643uniphier_wdt:
    644    timeout:
    645	Watchdog timeout in power of two seconds.
    646	(1 <= timeout <= 128, default=64)
    647    nowayout:
    648	Watchdog cannot be stopped once started
    649	(default=kernel config parameter)
    650
    651-------------------------------------------------
    652
    653w83627hf_wdt:
    654    wdt_io:
    655	w83627hf/thf WDT io port (default 0x2E)
    656    timeout:
    657	Watchdog timeout in seconds. 1 <= timeout <= 255, default=60.
    658    nowayout:
    659	Watchdog cannot be stopped once started
    660	(default=kernel config parameter)
    661
    662-------------------------------------------------
    663
    664w83877f_wdt:
    665    timeout:
    666	Watchdog timeout in seconds. (1<=timeout<=3600, default=30)
    667    nowayout:
    668	Watchdog cannot be stopped once started
    669	(default=kernel config parameter)
    670
    671-------------------------------------------------
    672
    673w83977f_wdt:
    674    timeout:
    675	Watchdog timeout in seconds (15..7635), default=45)
    676    testmode:
    677	Watchdog testmode (1 = no reboot), default=0
    678    nowayout:
    679	Watchdog cannot be stopped once started
    680	(default=kernel config parameter)
    681
    682-------------------------------------------------
    683
    684wafer5823wdt:
    685    timeout:
    686	Watchdog timeout in seconds. 1 <= timeout <= 255, default=60.
    687    nowayout:
    688	Watchdog cannot be stopped once started
    689	(default=kernel config parameter)
    690
    691-------------------------------------------------
    692
    693wdt285:
    694    soft_margin:
    695	Watchdog timeout in seconds (default=60)
    696
    697-------------------------------------------------
    698
    699wdt977:
    700    timeout:
    701	Watchdog timeout in seconds (60..15300, default=60)
    702    testmode:
    703	Watchdog testmode (1 = no reboot), default=0
    704    nowayout:
    705	Watchdog cannot be stopped once started
    706	(default=kernel config parameter)
    707
    708-------------------------------------------------
    709
    710wm831x_wdt:
    711    nowayout:
    712	Watchdog cannot be stopped once started
    713	(default=kernel config parameter)
    714
    715-------------------------------------------------
    716
    717wm8350_wdt:
    718    nowayout:
    719	Watchdog cannot be stopped once started
    720	(default=kernel config parameter)
    721
    722-------------------------------------------------
    723
    724sun4v_wdt:
    725    timeout_ms:
    726	Watchdog timeout in milliseconds 1..180000, default=60000)
    727    nowayout:
    728	Watchdog cannot be stopped once started