On Thu, Jun 26, 2025 at 04:47:50PM GMT, Nam Cao wrote: > The initial implementation of PCI/MSI interrupt domains in the hierarchical > interrupt domain model used a shortcut by providing a global PCI/MSI > domain. > > This works because the PCI/MSI[X] hardware is standardized and uniform, but > it violates the basic design principle of hierarchical interrupt domains: > Each hardware block involved in the interrupt delivery chain should have a > separate interrupt domain. > > For PCI/MSI[X], the interrupt controller is per PCI device and not a global > made-up entity. > > Unsurprisingly, the shortcut turned out to have downsides as it does not > allow dynamic allocation of interrupt vectors after initialization and it > prevents supporting IMS on PCI. For further details, see: > > https://lore.kernel.org/lkml/[email protected]/ > > The solution is implementing per device MSI domains, this means the > entities which provide global PCI/MSI domain so far have to implement MSI > parent domain functionality instead. > > This series converts the PCI controller drivers to implement MSI parent > domain. >
Applied the series except patch 14/16 to pci/controller/msi-parent, thanks! - Mani > drivers/pci/Kconfig | 1 + > drivers/pci/controller/Kconfig | 11 + > drivers/pci/controller/dwc/Kconfig | 1 + > .../pci/controller/dwc/pcie-designware-host.c | 68 ++---- > drivers/pci/controller/dwc/pcie-designware.h | 1 - > drivers/pci/controller/mobiveil/Kconfig | 1 + > .../controller/mobiveil/pcie-mobiveil-host.c | 42 ++-- > .../pci/controller/mobiveil/pcie-mobiveil.h | 1 - > drivers/pci/controller/pci-aardvark.c | 59 ++--- > drivers/pci/controller/pci-hyperv.c | 98 ++++++-- > drivers/pci/controller/pcie-altera-msi.c | 44 ++-- > drivers/pci/controller/pcie-brcmstb.c | 44 ++-- > drivers/pci/controller/pcie-iproc-msi.c | 45 ++-- > drivers/pci/controller/pcie-mediatek-gen3.c | 67 ++--- > drivers/pci/controller/pcie-mediatek.c | 46 ++-- > drivers/pci/controller/pcie-rcar-host.c | 69 ++---- > drivers/pci/controller/pcie-xilinx-dma-pl.c | 48 ++-- > drivers/pci/controller/pcie-xilinx-nwl.c | 45 ++-- > drivers/pci/controller/pcie-xilinx.c | 55 +++-- > drivers/pci/controller/plda/Kconfig | 1 + > drivers/pci/controller/plda/pcie-plda-host.c | 44 ++-- > drivers/pci/controller/plda/pcie-plda.h | 1 - > drivers/pci/controller/vmd.c | 229 +++++++++--------- > 23 files changed, 504 insertions(+), 517 deletions(-) > > -- > 2.39.5 > -- மணிவண்ணன் சதாசிவம்
