Re: [PATCH v2 3/3] target/arm: Restrict v7A TCG cpus to TCG accel

[Andrew Jones]

On Thu, Mar 18, 2021 at 11:38:51AM +0000, Peter Maydell wrote:
> On Thu, 18 Mar 2021 at 11:31, Philippe Mathieu-Daudé <philmd@redhat.com> 
> wrote:
> > I tend to agree. The problem is for the running VMs started before
> > 82bf7ae84ce (so up to any fork based on v5.2). I don't know what
> > the forks are supposed to do with the running VMs if they want to
> > migrate them to newer QEMU (or upgrade the host QEMU).
> 
> Anybody with a Cortex-A15 KVM VM is just going to have to stay
> with their pre-existing ancient hardware, their pre-existing
> host kernel and their pre-existing QEMU binary. That's what
> "we deprecated and then dropped support for this" means:
> we no longer support running that kind of VM, so users who
> were doing it need to either do something else instead, or
> else just keep on going with the old versions they have.
>

I strongly agree.

And, downstream-wise, I can't speak for anything but RHEL, but RHEL
cannot have this problem. There are no 32-bit ARM builds for RHEL.

Thanks,
drew