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

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 3/18/21 1:50 PM, Claudio Fontana wrote:
> On 3/18/21 1:37 PM, Andrew Jones wrote:
>> 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.

Great then. Sorry for the confusion.

> I don't see a strong issue with this either, there is no 32bit support for KVM ARM.