FEAT_CMOW

[Manoj Ekbote]

Hi,

While looking at the mainline v6.18.6 sources, I noticed that FEAT_CMOW does not appear in the arm64 CPU capability table (arch/arm64/kernel/cpufeature.c). Since CMOW is a mandatory architectural feature starting in Arm v8.8, I expected to see it in the cpufeature framework.
How is the cpu feature list typically updated for architectural extensions like this?
Is it done only when the kernel needs to make use of the feature, or is there a process to actively add all mandatory architecture features?

Thanks