Hi everyone,
A large portion of my intel-based products are suffering from
a nasty hardware freeze [1], and so I'm currently working this around
enabling the iTCO watchdog -- which in any case, it's a good idea
to have enabled.
So, it would be interesting to find out on each boot if the machine was
rebooted due to a watchdog timeout, but so far I'm not having any luck.
As per Intel's appnote [2] the BIOS should update the WDDT ACPI table,
so I added something like this to the iTCO driver:
status = acpi_get_table(ACPI_SIG_WDDT, 1,
(struct acpi_table_header **) &buf);
if (ACPI_FAILURE(status) || buf->header.length < sizeof(*buf)) {
pr_err(FW_BUG "failed to get WDDT ACPI table\n");
return;
}
But it doesn't find the table. Strangely, reading TCO1_STS
and TCO2_STS always gives 0x0.
Tests were done on a Lynx Point:
[ 7.131502] iTCO_wdt: Found a Lynx Point TCO device (Version=2,
TCOBASE=0x1860)
Any ideas? Is it possible to get this information or should I just gave up?
[1] https://bugzilla.kernel.org/show_bug.cgi?id=109051
[2] http://download.intel.com/design/chipsets/applnots/29227301.pdf
Thanks!
--
Ezequiel García, VanguardiaSur
www.vanguardiasur.com.ar
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