Re: [PATCH v2 2/4] hw/arm/sbsa-ref: Force CPU generic timer to 62.5MHz

[Marcin Juszkiewicz]

W dniu 26.04.2024 o 14:29, Peter Maydell pisze:
> The default frequency used by the 'max' CPU is about to change, so
> make the sbsa-ref board force the CPU frequency to the value which
> the firmware expects.
>
> Newer versions of TF-A will read the frequency from the CPU's
> CNTFRQ_EL0 register:
>   
> https://github.com/ARM-software/arm-trusted-firmware/commit/4c77fac98dac0bebc63798aae9101ac865b87148
> so in the longer term we could make this board use the 1GHz
> frequency. We will need to make sure we update the binaries used
> by our avocado test
>   Aarch64SbsarefMachine.test_sbsaref_alpine_linux_max_pauth_impdef
> before we can do that.
>
> Signed-off-by: Peter Maydell<peter.maydell@linaro.org>
> ---
> I leave it up to the sbsa-ref maintainers exactly when they
> want to shift to 1GHz (probably after a TF-A release with the fix?)

Reviewed-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>

TF-A 2.11 will be released in June. It will have several other 
improvements so I prefer to wait for it.

We will have EDK2 202405 stable release then too which allow us to 
collect all changes we did during last half year (and maybe even those 
in progress).

In meantime we go with 62.5 MHz frequency as it was before so no one 
will get "too fast wall clock" issue. Then, in a middle of June, new 
firmware will be built for QEMU CI and we will be able to move to 1 GHz 
by default and maybe add some other changes on top.