Re: [PATCH v2 0/5] Initial support of Trusted Foundations on Tegra30

Dmitry Osipenko
2018-07-02T14:48:43Z

On Friday, 29 June 2018 22:37:02 MSK Peter Geis wrote:
> Good Afternoon,
>
> I have tested these patches on the Ouya T3 device.
> They work great to enable the L2 cache controller, however they do not
> respect explicitly disabling the L2 cache controller via the kernel
> config nor device tree.
>
> With CONFIG_CACHE_L2X0 disabled, but CONFIG_TRUSTED_FOUNDATIONS enabled,
> the L2 cache controller is silently enabled and allows all four cores to
> boot.
>

I don't see how cache could be enabled with CONFIG_CACHE_L2X0 disabled, there
is no code to do that. Could you elaborate please?

Secondary cores do not depend on the cache state, disabled cache shouldn't
prevent them to boot.

> One must also disable CONFIG_TRUSTED_FOUNDATIONS to stop the L2 cache
> controller from spinning up.
>
> Tested-by: Peter Geis <pgwipeout@gmail.com>
>