[PATCH v4 10/10] ARM: sunxi: smp: Add initialization of CNTVOFF

[Chen-Yu Tsai]

On Mon, Mar 19, 2018 at 3:07 AM, Mylène Josserand
<mylene.josserand at bootlin.com> wrote:
> Hello Mark,
>
> Please, excuse me for this late answer and thank you for the review!
>
> On Wed, 7 Mar 2018 12:18:33 +0000
> Marc Zyngier <marc.zyngier at arm.com> wrote:
>
>> On 23/02/18 13:37, Mylène Josserand wrote:
>> > On Cortex-A7, the CNTVOFF register from arch timer is uninitialized.
>>
>> Only on A7? Is that specific to your platform?
>
> I do not really know other Allwinner's platforms about this subject. At
> least, the sun9i-a80 which is a Cortex-a15/a7 does not need that but it
> is necessary for sun8i-a83t which is a cortex-a7. Maybe, Chen-Yu or
> Maxime could help us on it.

AFAIK all Allwinner CPUs need it if there isn't a firmware (PSCI) layer
beneath the kernel that will do the setup. We just have
"arm,cpu-registers-not-fw-configured" set for all the other SoCs that
have in-kernel SMP support, which includes the A31, A23, A33 and A80.

ChenYu