[lkml]   [2011]   [Oct]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH 0/4] iommu: iommu_ops group interface
    On Fri, 2011-10-21 at 20:34 +0000, Woodhouse, David wrote:
    > On Fri, 2011-10-21 at 13:55 -0600, Alex Williamson wrote:
    > > IOMMUs can't always distiguish transactions from each individual
    > > device in a system. Sometimes this is by design (such as powerpc
    > > partitionable endpoints), other times by topology (PCIe-to-PCI
    > > bridges masking downstream devices). We call these sets of
    > > indistinguishable devices "groups".
    > Other times it's because a multi-function PCIe device is broken and does
    > all its DMA from function zero.... like some Ricoh devices seen in
    > laptops. Can you handle quirks to "group" those too?

    I could add:

    drivers/pci/quirks.c: int pci_iommu_group_mf_quirk(struct pci_dev *)

    That's used just like iommu_group_mf to always blacklist specific
    devices. Let me know VID/DID if you have them. Thanks,


     \ /
      Last update: 2011-10-21 23:19    [W:0.019 / U:87.796 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site