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. changes in v6 -> v7: - Addressed feedback from Marc Zyngier about IRQ cleanup in the error path and explicitly setting the IRQ trigger type. - Address feedback from Bjorn Helgaas about subject line format. changes in v7 -> v8: - Addressed feedback from Michael Kelley about the cpu mask to use for the initial interrupt affinity and IRQ cleanup in the error path. Sunil Muthuswamy (2): PCI: hv: Make the code arch neutral by adding arch specific interfaces PCI: hv: Add arm64 Hyper-V vPCI support 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 | 312 ++++++++++++++++++++++++--- include/asm-generic/hyperv-tlfs.h | 33 --- 7 files changed, 331 insertions(+), 67 deletions(-) base-commit: fa55b7dcdc43c1aa1ba12bca9d2dd4318c2a0dbf -- 2.25.1
