Re: [RFC] PCI extended conf space when MMCONFIG disabled because of e820

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Brice Goglin wrote:er.
What would you think of a patch implementing the following strategy:
1) if MMCONFIG works, always use it (no change)
2) if MMCONFIG is disabled and we are accessing the regular config
space, use direct conf (no change, should ensure that any machine will
still boot fine)
3) if MMCONFIG is disabled but we are accessing the _extended_ config
space, try mmconfig anyway since there's no other way to do it.
an OS isn't allowed to mix old and new access methods realistically so I don't think
this is a viable good solution...
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