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Re: [PATCH v4] target/ppc: Add POWER9 DD2.2 model

From: Nicholas Piggin
Subject: Re: [PATCH v4] target/ppc: Add POWER9 DD2.2 model
Date: Tue, 16 May 2023 19:41:24 +1000

On Tue May 16, 2023 at 5:58 PM AEST, Frederic Barrat wrote:
> On 15/05/2023 18:02, Nicholas Piggin wrote:
> > POWER9 DD2.1 and earlier had significant limitations when running KVM,
> > including lack of "mixed mode" MMU support (ability to run HPT and RPT
> > mode on threads of the same core), and a translation prefetch issue
> > which is worked around by disabling "AIL" mode for the guest.
> > 
> > These processors are not widely available, and it's difficult to deal
> > with all these quirks in qemu +/- KVM, so create a POWER9 DD2.2 CPU
> > and make it the default POWER9 CPU.
> > 
> > Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> > ---
> I almost forgot: the patch doesn't apply cleanly on latest upstream.

Oh, some fuzz due to needing the PVR patch I think.


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