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    SubjectRe: [patch] Make MMCONFIG space (extended PCI config space) a driver opt-in issue
    Arjan van de Ven wrote:
    > Hi,
    > Linus really wants the extended (4Kb) PCI configuration space (using MCFG acpi table etc) to be opt-in, since there's many issues with it and most drivers don't even use/need it. The idea behind opt-in is that if you don't use it, you don't get to suffer the bugs...
    > Booted on my 64 bit test machine; sadly it has a defunct BIOS that doesn't have a working MCFG.
    > From: Arjan van de Ven <>
    > Subject: Make MMCONFIG space a driver opt-in
    > There are many issues with using the extended PCI configuration space
    > (CPU, Chipset and most of all BIOS bugs). This while the vast majority of drivers
    > and devices don't even use/need to use the memory mapped access methods since they
    > don't use the config space beyond the traditional 256 bytes.
    > This patch makes accessing the extended config space a driver choice, via the
    > pci_enable_ext_config(pdev)

    Yuck. And, Linus is just being silly. Wait a year then turn on
    MMCONFIG :) It took PCI MSI a while to mature, but is finally getting


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      Last update: 2007-12-22 15:23    [W:0.020 / U:31.992 seconds]
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