[PATCH v4 0/2] PCI: hv: Hyper-V vPCI for arm64

Sunil Muthuswamy
2021-11-09T22:15:40Z

From: Sunil Muthuswamy <sunilmut@microsoft.com>

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.

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 | 284 ++++++++++++++++++++++++---
include/asm-generic/hyperv-tlfs.h | 33 ----
7 files changed, 303 insertions(+), 67 deletions(-)

base-commit: e4e737bb5c170df6135a127739a9e6148ee3da82
--
2.25.1