Bug#981186: linux: Enable CMN-600 interconnect on arm64
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
Reply to: