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SubjectRe: [01/10] watchdog/hpwdt: Remove legacy NMI sourcing.
On Tue, Feb 06, 2018 at 03:58:46PM -0700, Jerry Hoemann wrote:
> Gen8 and prior Proliant systems supported the "CRU" interface
> to firmware. This interfaces allows linux to "call back" into firmware
> to source the cause of an NMI. This feature isn't fully utilized
> as the actual source of the NMI isn't printed, the driver only
> indicates that the source couldn't be determined when the call
> fails.
> With the advent of Gen9, iCRU replaces the CRU. The call back
> feature is no longer available in firmware. To be compatible and
> not attempt to call back into firmware on system not supporting CRU,
> the SMBIOS table is consulted to determine if it is safe to
> make the call back or not.
> This results in about half of the driver code being devoted
> to either making CRU calls or determing if it is safe to make
> CRU calls. As noted, the driver isn't really using the results of
> the CRU calls.
> As the CRU sourcing of the NMI isn't required for handling the
> NMI, remove the legacy (pre Gen9) NMI sourcing and the DMI code to
> determine if the system had the CRU interface.
> Signed-off-by: Jerry Hoemann <>
> Reviewed-by: Guenter Roeck <>

Spoke too early. This fails to compile if CONFIG_HPWDT_NMI_DECODING
is disabled. Please fix and resubmit the series, and please make sure
that each patch compiles on its own.


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