Re: [PATCH v4 1/2] arm/kvm: add support for MTE

[Cornelia Huck <cohuck@redhat.com>]

On Thu, Jan 26 2023, Cornelia Huck <cohuck@redhat.com> wrote:

> On Mon, Jan 23 2023, Eric Auger <eauger@redhat.com> wrote:
>
>> Hi Connie,
>> On 1/11/23 17:13, Cornelia Huck wrote:
>>>      if (vms->mte && (kvm_enabled() || hvf_enabled())) {
>>>          error_report("mach-virt: %s does not support providing "
>>> -                     "MTE to the guest CPU",
>>> +                     "emulated MTE to the guest CPU",
>> each time I read this message I feel difficult to understand it. Why not
>> replacing by
>> "mach-virt does not support tag memory with %s acceleration" or
>> something alike?
>
> Hmm... well, it does not support tag memory with kvm/hvf, and the
> consequence of this is that kvm/hvf cannot provide support for emulated
> mte... what about
>
> "mach-virt: tag memory not supported with %s, emulated MTE cannot be
> provided to the guest CPU"
>
> Might be a bit long, though.

"mach-virt: %s does not support providing emulated MTE to the guest CPU
(tag memory not supported)" seems to align better with the other error
messages in that function.


>
>>>                       kvm_enabled() ? "KVM" : "HVF");
>>>          exit(1);
>>>      }