Gentle reminder, for v5.13 ? On Wed, 2021-02-10 at 09:13 -0700, Jon Derrick wrote: > The Intel Volume Management Device acts similar to a PCI-to-PCI bridge in that > it changes downstream devices' requester-ids to its own. As VMD supports PCIe > devices, it has its own MSI-X table and transmits child device MSI-X by > remapping child device MSI-X and handling like a demultiplexer. > > Some newer VMD devices (Icelake Server) have an option to bypass the VMD MSI-X > remapping table. This allows for better performance scaling as the child device > MSI-X won't be limited by VMD's MSI-X count and IRQ handler. > > V3->V4: > Integrated wording suggestions; no functional changes > > V2->V3: > Trivial comment fixes > Added acks > > V1->V2: > Updated for 5.12-next > Moved IRQ allocation and remapping enable/disable to a more logical location > > V1 patches 1-4 were already merged > V1, 5/6: https://patchwork.kernel.org/project/linux-pci/patch/20200728194945.14126-6-jonathan.derrick@xxxxxxxxx/ > V1, 6/6: https://patchwork.kernel.org/project/linux-pci/patch/20200728194945.14126-7-jonathan.derrick@xxxxxxxxx/ > > > Jon Derrick (2): > iommu/vt-d: Use Real PCI DMA device for IRTE > PCI: vmd: Disable MSI-X remapping when possible > > drivers/iommu/intel/irq_remapping.c | 3 +- > drivers/pci/controller/vmd.c | 63 +++++++++++++++++++++++------ > 2 files changed, 53 insertions(+), 13 deletions(-) >
