[Yakkety] enable EDAC_GHES in kernel config

[Manoj Iyer]

EDAC_GHES is essential for ARMv8.0 Server systems, as it enables firmware-first error handling of memory and CPU errors. Due to a lack of standard RAS architecture (or machine check architecture equivalent) on ARMv8.0 systems, APEI/GHES is the only mechanism available for reporting hardware errors (e.g. memory and CPU errors). This enables reporting of hardware errors, and also helps enable memory fault recovery mechanisms to extend the life of the system by offlining pages when recoverable uncorrected errors are encountered. Note that other ARM vendors will be going in this direction for hardware error handling.

Currently ACPI_APEI_GHES=n is in Ubuntu and CONFIG_EDAC_MM_EDAC=m for ARM64, but EDAC_GHES requires this to be =y therefore it is not selected.

== SRU Request ==

[Impact]
* As a result of ACPI_APEI_GHES=n and CONFIG_EDAC_MM_EDAC=m for ARM64, EDAC_GHES is not selected on kernel build. This results in loss of functionality needed for firmware error handling of memory and CPU errors.

[Test Case]
* NA

[Regression Potential]
* None.

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1628111

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Manoj Iyer (manjo)]

Config change wont be sufficient at this time, We will also need supporting patch: https://lkml.org/lkml/2016/8/10/231