Re: [RFC 18/21] arm/cpu: Introduce a customizable kvm host cpu model

[Eric Auger]

Hi Peter,

On 11/4/24 18:16, Peter Maydell wrote:
> On Mon, 4 Nov 2024 at 17:09, Eric Auger <eric.auger@redhat.com> wrote:
>> Was just wondering if all the writable ID reg fields were associated to
>> an official FEAT_ listed in this feature list.
>> Let's take for instance CTR_EL0.DIC. Is it associated to a given
>> extension or is it just implementation defined?
> CTR_EL0.DIC is IMPDEF choice of 0 or 1. There's no associated
> FEAT_* -- as an implementation, you are effectively just
> reporting here what your implementation's properties are.
>
> (CTR_EL0 is not an ID register in the architectural sense.)

thank you for the confirmation. So this means we also need to be able to
tune such bit although it does not have any fellow FEAT_*.

Eric
>
> thanks
> -- PMM
>