[edk2-devel] [PATCH v5 1/6] MdeModulePkg/PciHostBridge: io range is not mandatory

[Gerd Hoffmann]

On Wed, Apr 27, 2022 at 03:08:50AM +0000, Ni, Ray wrote:
> Ard,
> can you explain more?
> 
> Your code changes the PciHostBridge driver to ignore the failure of IO allocation.
> If IO requirement of certain PCI(E) devices can be ignored, can you change the IncompatiblePciDevice protocol implementation to override the IO request from the devices?

Hmm, it's a problem indeed, device initialization fails in case an
io bar is present even if the bar is not required to drive the device.

Suggestions how to deal with this best?  ovmf has it's own
IncompatiblePciDevice Protocol implementation, so I could
handle it there because only OvmfPkg/Microvm needs this.

Or should the MdeModulePkg version be updated too?

thanks,
  Gerd



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