Hi Bjorn, On Mon, Jul 20, 2015 at 07:13:49PM -0500, Bjorn Helgaas wrote: > Bjorn Helgaas (11): > iommu/vt-d: Cache PCI ATS state and Invalidate Queue Depth > PCI: Allocate ATS struct during enumeration > PCI: Embed ATS info directly into struct pci_dev > PCI: Reduce size of ATS structure elements > PCI: Rationalize pci_ats_queue_depth() error checking > PCI: Inline the ATS setup code into pci_ats_init() > PCI: Use pci_physfn() rather than looking up physfn by hand > PCI: Clean up ATS error handling > PCI: Move ATS declarations to linux/pci.h so they're all together > PCI: Stop caching ATS Invalidate Queue Depth > PCI: Remove pci_ats_enabled() So while you are at working on ATS, could we probably also introduce a way to globally disable ATS on a box from the kernel command line (pci=noats?)? ATS is basically a way for a device to tunnel through the IOMMU without access checking (because pre-translated requests are not checked again). For security reasons it would be good to have a way to disable ATS completly if desired. Joerg -- 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
