For anyone having this issue,the below patch detects the error in PciHostBridge aperture, from 9elements github repository: https://github.com/9elements/edk2-1/commit/6be829a631e3e0e7f6043c88cfef33f9a0588298
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<div>also available in system76 repo: https://github.com/system76/edk2.git</div>
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<div>commit cf6caab535e84e5d3b3f1462d7ad57c7a914a5b8</div>
<div>Author: Patrick Rudolph &lt;patrick.rudolph@9elements.com&gt;</div>
<div>Date: Mon Oct 12 07:55:44 2020 -0600</div>
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<div>UefiPayloadPkg/Library/PciHostBridgeLib: Add warning for coreboot/EDK2 incompability</div>
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<div>EDK2 expects PCI bars to be continously be allocated without "gaps" of reserverd</div>
<div>memory in between.</div>
<div>coreboot places PCI bars anyware in the PCI MMIO space, interleaved with MMCONF</div>
<div>and reserved I/O MMIO space.</div>
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<div>Warn about this behaviour and refuse to add the BAR to the PCI aperature as it would</div>
<div>cause the PciHostBridgeDxe fo fail.</div>
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<div>Signed-off-by: Patrick Rudolph &lt;patrick.rudolph@9elements.com&gt;</div>