[PATCH 07/22] arm64: Keep track of CPU feature registers

[Dave Martin]

On Wed, Sep 16, 2015 at 03:21:05PM +0100, Suzuki K. Poulose wrote:
> From: "Suzuki K. Poulose" <suzuki.poulose at arm.com>
> 
> This patch adds an infrastructure to keep track of the CPU feature
> registers on the system. For each register, the infrastructure keeps
> track of the system wide safe value of the feature bits. Also, tracks
> the which fields of a register should be matched strictly across all
> the CPUs on the system for the SANITY check infrastructure.
> 
> The feature bits are classified as one of SCALAR_MIN, SCALAR_MAX and DISCRETE
> depending on the implication of the possible values. This information
> is used to decide the safe value for a feature.
> 
> SCALAR_MIN - The smaller value is safer
> SCALAR_MAX - The bigger value is safer
> DISCRETE - We can't decide between the two, so a predefined safe_value is used.

Can documentation of the meanings of these be added somewhere in the
relevant header or in Documentation?

Cheers
---Dave

[...]