[RFC PATCH v2 1/3] arm64: add CPU prefetch and cache modulation sysfs interface

[Breno Leitao]

On Wed, Oct 14, 2026 at 02:17:45PM +0800, Koba Ko wrote:
> For controlled performance characterization, is there an existing kernel
> mechanism or a different design you would recommend? Or do you think these
> experimental controls are better kept out of tree?

As a user of this patchset, I am trying hard to avoid carrying it out
of tree, either as patches or as a driver. Out-of-tree code makes
kernel rebases and rollouts slower, and debugging more complex.

Is there a way to keep a generic interface available under
CONFIG_EXPERT, or something similar, so that users who want to
experiment can use it?

We could even taint the kernel when the interface is used, to make it
clear that the user is messing with things they should not (!?).

Thanks,
--breno