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

[Peter Maydell]

On Thu, 18 Mar 2021 at 11:09, Philippe Mathieu-Daudé <philmd@redhat.com> wrote:
> Still, I'm not sure it makes sense. If you want to migrate a such
> machine, KVM can not virtualize it, so you'll be forced to use TCG
> right? In that case cpu_tcg is built in and you have the A15.
>
> IOW the problem is not this patch, it is that since 82bf7ae84ce we
> can not migrate A15.

Do you mean "we can't migrate a TCG A15" ? That would be a problem.
Or do you mean "we can't migrate a KVM A15" ? That's entirely
expected when we drop support for KVM A15 :-)
Or do you mean "migration from KVM to TCG doesn't work?" That's
a pre-existing thing I don't expect to work (we don't put anything
in to stop it working, but I'm pretty sure there will be a bunch
of things that mean it doesn't in practice work.)

> So we need both 1/ revert 82bf7ae84ce and 2/ be sure the kernel
> support 32-bit host... Am I missing something?

We're definitely not reverting 82bf7ae84ce if we can avoid it...

thanks
-- PMM