On 7/12/2024 5:01 PM, Ard Biesheuvel via groups.io wrote:
On Fri, 12 Jul 2024 at 11:24, Marcin Juszkiewicz
<marcin.juszkiew...@linaro.org> wrote:
SbsaQemu platform have several cpu models available. Since start it
reported "arm-virt" one in SMBIOS instead of real one.
This change replaces it with the real cpu model like Cortex-A57,
Neoverse-N2 etc.
Requires change in EDK2 to make PcdProcessorVersion dynamic.
Signed-off-by: Marcin Juszkiewicz <marcin.juszkiew...@linaro.org>
I am going to make the same remark as I did before in a different
context: how is it guaranteed that the code that sets the PCD executes
before the code that consumes it?
We could implement the setting in a 'PlatformInitDxe', which will be
added to the 'APPRIORI DXE' list to ensure it is scheduled to run in the
early DXE phase. This approach will help initialize the neccessary
compoenents early in the DXE phase, providing a stable foundation for
subsequent operations.
Making PCDs dynamic is usually not the solution here, unless they are
set in the PEI phase and consumed in the DXE phase or after.
The EFI SMBIOS protocol has an 'update string' method that you can
call from a platform driver. That might be a better fit here, and the
PCD can remain fixed, and carry a fallback default value.
In fact that the 'update string' method could eat up the boot time.
Hence, the SMBIOS string patching is not prefered.
Regards,
Nhi
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