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Re: [Qemu-devel] [PATCH v2 9/9] i386: Add Cascadelake-Server-v2 CPU mode

From: Eduardo Habkost
Subject: Re: [Qemu-devel] [PATCH v2 9/9] i386: Add Cascadelake-Server-v2 CPU model
Date: Tue, 2 Jul 2019 10:55:30 -0300

On Tue, Jul 02, 2019 at 10:47:17AM +0100, Daniel P. Berrangé wrote:
> On Thu, Jun 27, 2019 at 09:28:44PM -0300, Eduardo Habkost wrote:
> > Add new version of Cascadelake-Server CPU model, setting
> > stepping=5 and enabling the IA32_ARCH_CAPABILITIES MSR
> > with some flags.
> > 
> > The new feature will introduce a new host software requirement,
> > breaking our CPU model runnability promises.  This means we can't
> > enable the new CPU model version by default in QEMU 4.1, because
> > management software isn't ready yet to resolve CPU model aliases.
> > This is why "pc-*-4.1" will keep returning Cascadelake-Server-v1
> > if "-cpu Cascadelake-Server" is specified.
> Hmm, yes, we don't actually need to answer the question I
> raised in the earlier patch for another 2 releases yet,
> as we'll be sticking with v1 for all machines for a while.

After these 2 releases have passed, we'll set default version to
CPU_VERSION_LATEST.  I don't see the need to set per-model


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