Re: [Qemu-devel] [PATCH v5 0/7] ARM: add PSCI 0.2 support in TCG mode

[Peter Maydell]

On 10 October 2014 12:02, Ard Biesheuvel <address@hidden> wrote:
> On 10 October 2014 12:56, Peter Maydell <address@hidden> wrote:
>> Do you see the odd behaviour after guest reset for 32
>> bit SMP cores?
>>
>
> I will try to reproduce it. I haven't tried, and I wasn't aware that
> SMP on TCG is supposed to be stable now otherwise.

It has always been *supposed* to be stable, the only reason
we didn't have it enabled on the AArch64 virt board was
that we didn't have PSCI implemented. There were some
bugs that we fixed recently. Anything else obviously needs
to be reported as a bug and investigated so we can fix it...

(32 bit TCG SMP support on boards like vexpress has been
supported for a long time. It just doesn't often make
much practical sense to use an SMP config because it will
inevitably be slower than the single-CPU config.)

>>> However, we still haven't addressed the CPU reset case, so issuing the
>>> PSCI reset under -bios does nothing.

>> Yep, that's also on my todo list, but it's orthogonal to
>> this patch series. We probably want this variant, though,
>> right?
>>
>> http://marc.info/?l=qemu-devel&m=141099155616120&w=2
>
> Yes, you're right, I had forgotten about sending that out.

Can I get you to send out that as a proper patch then,
please?

thanks
-- PMM