linux-kernel - [patch V2 00/33] genirq, PCI/MSI: Support for per device MSI and PCI/IMS

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Date:   Mon, 21 Nov 2022 15:37:46 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, Joerg Roedel <joro@...tes.org>,
        Will Deacon <will@...nel.org>, linux-pci@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Marc Zyngier <maz@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Ashok Raj <ashok.raj@...el.com>, Jon Mason <jdmason@...zu.us>,
        Allen Hubbe <allenbh@...il.com>
Subject: [patch V2 00/33] genirq, PCI/MSI: Support for per device MSI and
 PCI/IMS - Part 3 implementation

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(-)