Public bug reported:
The ACPI table entry now specifies whether access to the EMI (memory
interface which is part of the memory sub-system) registers needs to be
via secure calls. This requires the driver to be updated in order to add
SMC support.
SRU Justification:
[Impact]
Since secure calls have been enabled for bluefield_edac via ACPI, all EMI
register reads will return 0, and writes will have no effect. So the edac
driver will not provide any valid logs when an ECC error occurs.
[Fix]
Add support for SMC in bluefield_edac.
[Test case]
Verified by injecting an ECC error to trigger an EDAC event. The driver logs
display information from EMI registers accessed via secure calls.
[Regression potential]
Regression potential can be considered low since the driver first reads from
the ACPI table to decide whether to use the secure calls or not. If disabled,
it uses the existing path to access the registers.
** Affects: linux-bluefield (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1916318
Title:
ACPI table updated for bluefield_edac module
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