Re: [patch] Make MMCONFIG space (extended PCI config space) a driver opt-in issue

Linus Torvalds wrote:

Well, the *current* behaviour as far as setup is concerned is unacceptable. But yes, longer term, we should be able to just have quirk entries for saying "enable mmconfig because I know it's safe", except we should not enable them until after the core PCI probing has completed.

IMO that should be an arch decision, buried somewhere in arch/x86.

If other arches implement extended config space sanely -- and possibly via some arch-specific means that is /not/ mmconfig -- then they should be able to make an arch decision that extended PCI config space accesses Just Work(tm).

For such arches, pci_enable_ext_cfg_space(pdev) would be a no-op, always returning success.

	Jeff


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