Re: [RFC v1 1/1] Refactor ACPI DMA to support platforms without shared info descriptor in CSRT

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On 22/03/2023 14:32, Andy Shevchenko wrote:
SPCR is not standard either. So, that's to show that this is not an argument.

Are those firmwares already in the wild? Why they can't be fixed and why
existing CSRT shared info data structure can't be used.

Few arm platform ACPI tables without shared info

NXP I.MX8 EVK:

https://github.com/ms-iot/MU_SILICON_NXP/blob/master/iMX8Pkg/AcpiTables/Csrt.aslc

Raspberry Pi:

https://github.com/tianocore/edk2-platforms/blob/master/Platform/RaspberryPi/AcpiTables/Csrt.aslc

Windows Dev Kit (Qualcomm 8cx Gen 3)

https://github.com/linux-surface/acpidumps/blob/master/windows_dev_kit_2023/csrt.dsl


Do you know where is the shared info data structure defined ?
I couldn't find any reference to it.


--
Niyas



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