* Allen Kay (allen.m.kay@xxxxxxxxx) wrote: > Changes from v4 to v5: > - separate out dom0 checking out of v4 > - use iommu_found() for detecting HW iommu presence Erk, turns out iommu_found() doesn't work (becuase the iommu has been detected, but not initialized yet when this code runs). This could be fixed in a few ways: 1) Have an isolation capable iommu actively ask for ACS to be enabled 2) Have pci core switch to iommu_detected (as Allen had done earlier). This would need some work to make iommu_detected actually defined on all arches that make use of pci. iommu_detected could be more descriptive than a single boolean, turned into an enum that says what kind of hw iommu was detected. 3) Just always enable ACS and pay the price. I'll send a patch for option 1) momentarily. Thoughts? thanks, -chris -- 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
