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    SubjectRe: 3.2rc1: bootup fails: DRHD: handling fault status reg 2
    On Tue, 2011-11-15 at 08:55 +0000, David Woodhouse wrote:
    > On Mon, 2011-11-14 at 20:36 -0800, Chris Wright wrote:
    > > As for the endless loop of DMAR faults...sounds like the Ricoh
    > > cardbus/firewire issue where the firewire fucntion does DMA from
    > > function 0. I thought this was quirked and fixed though.
    > Alex? You were handling this as part of the IOMMU 'group' functionality,
    > weren't you? Did you have a test machine... you do now :)

    The group functionality is primarily for iommu_ops so we can expose to
    users which devices need to be grouped because of iommu restrictions.
    We can add a quirk to the grouping for this device, but then we have to
    figure out how dma_ops makes use of that info too. Maybe we could have
    a 'struct pci_dev *pci_get_iommu_alias_quirk(struct pci_dev *pdev)'
    function that given device 0d:00.3 would return 0d:00.0 for this case
    and both get_domain_for_dev() and intel_iommu_device_group() could make
    use of it. Thanks,


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