[patch V2 00/33] genirq, PCI/MSI: Support for per device MSI and PCI/IMS - Part 3 implementation

Thomas Gleixner
2022-11-21T14:38:43Z

This is V2 of the third part of the effort to provide support for per device
MSI interrupt domains.

Version 1 of this part can be found here:

https://lore.kernel.org/all/20221111133158.196269823@linutronix.de

This is based on the second part which is available here:

https://lore.kernel.org/all/20221121083210.309161925@linutronix.de

and from git:

git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git devmsi-v2-part2

This third part is available from git too:

git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git devmsi-v2-part3

This part provides the actual per device domain implementation and related
functionality:

1) Provide infrastructure to create and remove per device MSI domains

2) Implement per device MSI domains in the PCI/MSI code and make
them conditional on the availability of a suitable parent MSI
domain. This allows to convert the existing domains one by one
and keeps both the legacy and the current "global" PCI/MSI domain
model working.

3) Convert the related x86 MSI domains over (vector and remapping).

4) Provide core infrastructure for dynamic allocations

5) Provide PCI/MSI-X interfaces for device drivers to do post
MSI-X enable allocation/free

6) Enable dynamic allocation support on the x86 MSI parent domains

7) Provide infrastructure to create PCI/IMS domains

8) Enable IMS support on the x86 MSI parent domains

9) Provide a driver for IDXD which demonstrates how IMS domains
look like.

Changes vs. v1:

- Clarified argument names for the init callback (Jason)

- Split the domain and instance data and named them accordingly

- Fixed the recursive allocation issue and the missing index offset
(Reinette)

- Updated changelogs and comments (Bjorn, Jason)

- Fixed the kernel robot fallout from randconfig builds

- Picked up Reviewed/Acked-by tags where appropriate

Thanks,

tglx
---
arch/x86/include/asm/irq_remapping.h | 4
arch/x86/include/asm/msi.h | 6
arch/x86/include/asm/pci.h | 1
arch/x86/kernel/apic/msi.c | 208 +++++++++------
drivers/iommu/amd/amd_iommu_types.h | 1
drivers/iommu/amd/iommu.c | 23 +
drivers/iommu/intel/iommu.h | 1
drivers/iommu/intel/irq_remapping.c | 31 +-
drivers/irqchip/Kconfig | 7
drivers/irqchip/Makefile | 1
drivers/irqchip/irq-pci-intel-idxd.c | 143 ++++++++++
drivers/pci/msi/api.c | 117 ++++++++
drivers/pci/msi/irqdomain.c | 278 ++++++++++++++++++--
drivers/pci/msi/msi.c | 192 ++++++++------
drivers/pci/msi/msi.h | 4
include/linux/irqchip/irq-pci-intel-idxd.h | 22 +
include/linux/irqdomain.h | 9
include/linux/irqdomain_defs.h | 5
include/linux/msi.h | 149 +++++++++-
include/linux/msi_api.h | 38 ++
include/linux/pci.h | 14 +
kernel/irq/msi.c | 394 +++++++++++++++++++++++++++--
22 files changed, 1395 insertions(+), 253 deletions(-)