Re: pci-disable-decode-of-io-memory-during-bar-sizing.patch

Arjan van de Ven
2007-11-01T14:09:32Z

On Thu, 1 Nov 2007 09:31:40 +0100
Martin Mares <mj@ucw.cz> wrote:

> Hello!
>
> > something like
> > int pci_enable_mmconfig(struct pci_dev *pdev) ?
> > sounds like a very solid plan to me...
>
> Please remember that the driver is not the sole user of the PCI config
> space -- user-space programs (e.g., lspci) can access it via sysfs,
> too. Should we force users of such programs to add a magic kernel
> parameter to enable MMCONFIG? Does not make much sense.
>
> Maybe we should do all bus scanning with conf1 and then try if
> MMCONFIG returns the same values?

that is already in the code today but not nearly enough; there's a ton
of cases where it's "touch mmconfig and the box is dead"...