linux-kernel - [PATCH v3 0/2] PCI: hv: Hyper-V vPCI for ARM64

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Message-Id: <1634226794-9540-1-git-send-email-sunilmut@linux.microsoft.com>
Date:   Thu, 14 Oct 2021 08:53:12 -0700
From:   Sunil Muthuswamy <sunilmut@...ux.microsoft.com>
To:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        wei.liu@...nel.org, maz@...nel.org, decui@...rosoft.com,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, hpa@...or.com,
        lorenzo.pieralisi@....com, robh@...nel.org, kw@...ux.com,
        bhelgaas@...gle.com, arnd@...db.de
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        linux-hyperv@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-arch@...r.kernel.org,
        Sunil Muthuswamy <sunilmut@...rosoft.com>
Subject: [PATCH v3 0/2] PCI: hv: Hyper-V vPCI for ARM64

From: Sunil Muthuswamy <sunilmut@...rosoft.com>

Current Hyper-V vPCI code only compiles and works for x64. There are some
hardcoded assumptions about the architectural IRQ chip and other arch
defines.

Add support for Hyper-V vPCI for ARM64 by first breaking the current hard
coded dependency using a set of new interfaces and implementing those for
X64 first. That is in the first patch. The second patch adds support for
Hyper-V vPCI for ARM64 by implementing the above mentioned interfaces. That
is done by introducing a Hyper-V vPCI specific MSI IRQ domain & chip for
allocating SPI vectors.

changes in v1 -> v2:
 - Moved the irqchip implementation to drivers/pci as suggested
   by Marc Zyngier
 - Addressed Multi-MSI handling issues identified by Marc Zyngier
 - Addressed lock/synchronization primitive as suggested by Marc
   Zyngier
 - Addressed other code feedback from Marc Zyngier

changes in v2 -> v3:
 - Addressed comments from Bjorn Helgaas about patch formatting and
   verbiage
 - Using 'git send-email' to ensure that the patch series is correctly
   threaded. Feedback by Bjorn Helgaas
 - Fixed Hyper-V vPCI build break for module build, reported by Boqun Feng

Sunil Muthuswamy (2):
  PCI: hv: Make the code arch neutral by adding arch specific interfaces
  arm64: PCI: hv: Add support for Hyper-V vPCI

 MAINTAINERS                                 |   2 +
 arch/arm64/include/asm/hyperv-tlfs.h        |   9 +
 arch/x86/include/asm/hyperv-tlfs.h          |  33 +++
 arch/x86/include/asm/mshyperv.h             |   7 -
 drivers/pci/Kconfig                         |   2 +-
 drivers/pci/controller/Kconfig              |   2 +-
 drivers/pci/controller/Makefile             |   2 +-
 drivers/pci/controller/pci-hyperv-irqchip.c | 267 ++++++++++++++++++++
 drivers/pci/controller/pci-hyperv-irqchip.h |  20 ++
 drivers/pci/controller/pci-hyperv.c         |  58 +++--
 include/asm-generic/hyperv-tlfs.h           |  33 ---
 11 files changed, 373 insertions(+), 62 deletions(-)
 create mode 100644 drivers/pci/controller/pci-hyperv-irqchip.c
 create mode 100644 drivers/pci/controller/pci-hyperv-irqchip.h


base-commit: e4e737bb5c170df6135a127739a9e6148ee3da82
-- 
2.25.1