** Description changed: 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.
** Description changed: 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 + * NA [Regression Potential] * None. ** Changed in: linux (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1628111 Title: [Yakkety] enable EDAC_GHES in kernel config To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1628111/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
