On Thu, Nov 17, 2011 at 10:09:26AM -0700, Alex Williamson wrote: > IOMMU drivers should account for the platform's susceptibility to > DMA triggered MSI interrupts in creating IOMMU groups. Skip > devices when the IOMMU can't isolate MSI from DMA, but allow > an iommu=group_unsafe_msi option for opt-in. This removes the > leap in logic for users that IOMMU_CAP_INTR_REMAP is required for > interrupt security when they may be running on a non-x86 platform > that does not have this dependency. I actually don't see the point in this. The iommu-group thing is to tell user-space what devices the IOMMU can safely distinguish between. The absence of interrupt-remapping changes nothing to that grouping. So why remove it when interrupt remapping is not enabled? Joerg -- AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo, Andrew Bowd Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632 -- 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
