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Re: [PATCH v1 0/2] s390x/cpumodel: Introduce "best" model variants

From: Peter Maydell
Subject: Re: [PATCH v1 0/2] s390x/cpumodel: Introduce "best" model variants
Date: Mon, 18 Nov 2019 10:53:32 +0000

On Mon, 18 Nov 2019 at 10:47, David Hildenbrand <address@hidden> wrote:
> My personal opinion: "max" really means "all features". If we want an
> automatic way to specify something you requested ("give me something
> that's going to work") we either have to change the definition of the
> max model for alla rchitectures or introduce something that really
> matches the "no -cpu specified" - e.g., "best".

I don't strongly object to 'max' including deprecated features,
but I do definitely object to 'max' including by default any
experimental (x- prefix) features. Those should never be
enabled (whatever the '-cpu foo' name) unless the user has
specifically opted into them: that's the point of the x- prefix.
We need to be able to tell from the command line whether it's
got any non-standard weirdness enabled.

-- PMM

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