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

[Ard Biesheuvel]

On 10 October 2014 13:22, Peter Maydell <address@hidden> wrote:
> 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.)
>

OK

>>>> 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?
>

Of course.

-- 
Ard.