Re: [PATCH v3 1/3] arm64: cpufeature: Extract capped fields

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On 02/01/2020 12:39, Andrew Murray wrote:
When emulating ID registers there is often a need to cap the version
bits of a feature such that the guest will not use features that do
not yet exist.

Let's add a helper that extracts a field and caps the version to a
given value.

Signed-off-by: Andrew Murray <andrew.murray@xxxxxxx>

Reviewed-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>

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