[PATCH v6 0/2] PCI: hv: Hyper-V vPCI for arm64

[Sunil Muthuswamy]

From: Sunil Muthuswamy <sunilmut@xxxxxxxxxxxxx>

Current Hyper-V vPCI code only compiles and works for x86. 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
x86 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

changes in v3 -> v4:
 - Removed the separate file for IRQ chip that was there in previous
   iterations and moved the IRQ chip implementation to pci-hyperv.c.
   Feedback by Michael Kelley and Marc Zyngier.
 - Addressed various comments from Marc Zyngier about structuring and
   layout.
 - Addressed comment from Marc Zyngier about IRQ affinity and other
   miscellaneous comments.

changes in v4 -> v5:
 - Fixed an issue with picking the right cpu for irq affinity, identified
   by Marc Zyngier.

changes in v5 -> v6:
 - Minor comment updates suggested by Michael Kelley.

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

 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/pci-hyperv.c  | 281 ++++++++++++++++++++++++---
 include/asm-generic/hyperv-tlfs.h    |  33 ----
 7 files changed, 300 insertions(+), 67 deletions(-)


base-commit: fa55b7dcdc43c1aa1ba12bca9d2dd4318c2a0dbf
-- 
2.25.1