On Mon, Jul 20, 2015 at 07:13:49PM -0500, Bjorn Helgaas wrote: > Gregor reported a deadlock [1] when enabling a VF that supports ATS. > This series is intended to fix that. The second patch should be enough to > fix the deadlock; the rest are simplification and cleanup. > > These are based on v4.2-rc2. > > [1] http://permalink.gmane.org/gmane.linux.kernel.iommu/9433 > > Changes between v1 and v2: > - Remove use of pci_ats_enabled() (intel-iommu.c) > - Call pci_ats_queue_depth() only once per device and cache result > (intel-iommu.c) > - Remove pci_ats_enabled() interface > - Stop caching queue depth in pci_dev to save space > - Add PF refcount of how many associated VFs have ATS enabled > - Add comment that ATS must be enabled on PF before on VFs > - Require ATS to be disabled on all VFs and PF before changing STU > > > --- > > 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()
I applied these to a pci/iommu branch for v4.3. Let me know if you see any issues. _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
