Re: [edk2-devel] [BUG] Extremely slow boot times with CPU and GPU passthrough and host phys-bits > 40

["mitchell.augustin via groups.io" <mitchell.augustin=canonical.com@groups.io>]

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Hi again,
I have a more specific version of a prior question: Is there some fw_cfg flag that would simply allow me to use the classic MMIO window, in effect keeping PlatformInfoHob->PcdPciMmio64Size and PlatformInfoHob->PcdPciMmio64Base set to what they would be with the PlatformDynamicMmioWindow patch ( https://github.com/tianocore/edk2/commit/ecb778d0ac62560aa172786ba19521f27bc3f650 ) disabled?

X-PciMmio64Mb has been useful for debugging so far, but if there is some similar flag that can be used to do the above rather than just specifying an explicit MMIO window size, that would also be very helpful.

Thanks,
Mitchell Augustin


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