* Alex Williamson (alex.williamson@xxxxxxxxxx) wrote: > We currently manage iommu_coherency on a per domain basis, > choosing the safest setting across the iommus attached to a > particular domain. This unfortunately has a bug that when > no iommus are attached, the domain defaults to coherent. > If we fall into this mode, then later add a device behind a > non-coherent iommu to that domain, the context entry is > updated using the wrong coherency setting, and we get dmar > faults. > > Since we expect chipsets to be consistent in their coherency > setting, we can instead determine the coherency once and use > it globally. > > Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx> Looks good to me. Acked-by: Chris Wright <chrisw@xxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
