Source: linux Version: Please enable ARM CMN-600 power management on arm64 Severity: normal Tags: patch
Current arm hardware such as graviton2 (AWS arm64 hardware) has 'Coherent Mesh Network' interconnect (between components in a soc). It's important that support for this is built in the kernel so it can be used. This requires CONFIG_ARM_CMN=y This explains what the feature is: https://www.arm.com/products/silicon-ip-system/corelink-interconnect/cmn-600 Graviton2: https://www.anandtech.com/show/15578/cloud-clash-amazon-graviton2-arm-against-intel-and-amd patch attached: --- debian/config/arm64/config~ 2021-01-27 04:34:51.359552398 +0000 +++ debian/config/arm64/config 2021-01-27 04:53:11.922998842 +0000 @@ -942,6 +942,7 @@ CONFIG_ARM_CCI400_PMU=y CONFIG_ARM_CCI5xx_PMU=y CONFIG_ARM_CCN=y +CONFIG_ARM_CMN=y CONFIG_QCOM_L2_PMU=y CONFIG_QCOM_L3_PMU=y CONFIG_XGENE_PMU=y
--- debian/config/arm64/config~ 2021-01-27 04:34:51.359552398 +0000 +++ debian/config/arm64/config 2021-01-27 04:53:11.922998842 +0000 @@ -942,6 +942,7 @@ CONFIG_ARM_CCI400_PMU=y CONFIG_ARM_CCI5xx_PMU=y CONFIG_ARM_CCN=y +CONFIG_ARM_CMN=y CONFIG_QCOM_L2_PMU=y CONFIG_QCOM_L3_PMU=y CONFIG_XGENE_PMU=y