Messages in this thread | | | Date | Wed, 22 Jul 2020 03:59:12 +0100 | From | Matthew Wilcox <> | Subject | Re: [PATCH] x86/PCI: Use MMCONFIG by default for KVM guests |
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On Wed, Jul 22, 2020 at 02:15:13AM +0200, Julia Suvorova wrote: > @@ -264,6 +265,10 @@ void __init pci_direct_init(int type) > { > if (type == 0) > return; > + > + if (raw_pci_ext_ops && kvm_para_available()) > + return;
This is a bit of a subtle way of saying "If mmconfig exists, don't use the cf8 mechanism". There's probably a better way of doing this, but the x86 pci init sequence is already byzantine and I don't understand it well enough to offer you an alternative.
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