We plan to restructure x86 interrupt code based on hierarchy irqdomain, that is to build irqdomains for CPU vector, interrupt remapping unit, IOAPIC, MSI and HPET etc and organize those irqdomains in hierarchy mode. Each irqdomain manages corresponding interrupt controller and talks to parent interrupt controller through public irqdomain interfaces. We also support stacked irq_chip based on hierarchy irqdomain. It will make the x86 interrupt architecture much more clear and more easy to maintain with hierarchy irqdomain and stacked irq_chip. It may also help ARM interrupt management architecture too. This is the second patch set to enable support of hierarchy irqdomain on x86 platforms. It depends on the first part at: https://lkml.org/lkml/2014/10/27/122 And you may access it at: https://github.com/jiangliu/linux.git irqdomain/p2v3 And there will be a third patch set to convert IOAPIC driver to support hierarchy irqdomain and clean up code. The first patch extends irqdomain interfaces to support hierarchy irqdomain. Hope this interface could be used by other architectures too, such as ARM/ARM64. The second patch introduces two helper functions to support stacked irq_chip. Patch 3-9 implements an irqdomain to manange CPU interrupt vectors, and it's the root irqdomain for x86 platforms. Patch 10-13 converts Intel and AMD interrupt remapping drivers to support hierarchy irqdomain. Patch 14-16 converts HPET and MSI to support hierarchy irqdomain. Patch 17-20 cleans up unsued code in x86 arch and interrupt remapping drivers. Patch 21-24 converts DMAR, HTIRQ and UV to support hierarchy irqdomain. We have tested this patchset on Intel 32-bit and 64-bit systems. And it also passes Fengguang's 0day tests. But helps are need for testing: 1) AMD interrupt remapping 2) AMD HT_IRQ 3) UV platform V2->V3: 1) Fix bugs in handling OF irqdomain 2) Add documentation 3) Rebase to v3.18-rc2 V1->V2 1) Add hierarchy iredomain support of DMAR IRQ and UV IRQ. 2) Fix bugs reported by Joe C. 3) Address all review comments from Thomas 4) Fix a bug found during tests 5) Fix errors and warning found by 0day tests Jiang Liu (24): irqdomain: Introduce new interfaces to support hierarchy irqdomains genirq: Introduce helper functions to support stacked irq_chip x86, irq: Save destination CPU ID in irq_cfg x86, irq: Use hierarchy irqdomain to manage CPU interrupt vectors x86, hpet: Use new irqdomain interfaces to allocate/free IRQ x86, MSI: Use new irqdomain interfaces to allocate/free IRQ x86, uv: Use new irqdomain interfaces to allocate/free IRQ x86, htirq: Use new irqdomain interfaces to allocate/free IRQ x86, dmar: Use new irqdomain interfaces to allocate/free IRQ x86: irq_remapping: Introduce new interfaces to support hierarchy irqdomain iommu/vt-d: Change prototypes to prepare for enabling hierarchy irqdomain iommu/vt-d: Enhance Intel IR driver to suppport hierarchy irqdomain iommu/amd: Enhance AMD IR driver to suppport hierarchy irqdomain x86, hpet: Enhance HPET IRQ to support hierarchy irqdomain x86, MSI: Use hierarchy irqdomain to manage MSI interrupts x86, irq: Directly call native_compose_msi_msg() for DMAR IRQ iommu/vt-d: Clean up unused MSI related code iommu/amd: Clean up unused MSI related code x86: irq_remapping: Clean up unused MSI related code x86, irq: Clean up unused MSI related code and interfaces iommu/vt-d: Refine the interfaces to create IRQ for DMAR unit x86, irq: Use hierarchy irqdomain to manage DMAR interrupts x86, htirq: Use hierarchy irqdomain to manage Hypertransport interrupts x86, uv: Use hierarchy irqdomain to manage UV interrupts Documentation/IRQ-domain.txt | 71 +++++ arch/ia64/include/asm/irq_remapping.h | 2 - arch/ia64/kernel/msi_ia64.c | 30 +- arch/x86/Kconfig | 3 +- arch/x86/include/asm/hpet.h | 16 +- arch/x86/include/asm/hw_irq.h | 82 +++++ arch/x86/include/asm/irq_remapping.h | 85 ++++- arch/x86/include/asm/pci.h | 5 - arch/x86/include/asm/x86_init.h | 4 - arch/x86/kernel/apic/htirq.c | 178 ++++++++--- arch/x86/kernel/apic/io_apic.c | 3 - arch/x86/kernel/apic/msi.c | 545 +++++++++++++++++++++++++-------- arch/x86/kernel/apic/vector.c | 160 +++++++++- arch/x86/kernel/hpet.c | 57 +--- arch/x86/kernel/x86_init.c | 2 - arch/x86/platform/uv/uv_irq.c | 301 +++++++----------- drivers/iommu/amd_iommu.c | 388 ++++++++++++++++++----- drivers/iommu/amd_iommu_init.c | 4 + drivers/iommu/amd_iommu_proto.h | 9 + drivers/iommu/amd_iommu_types.h | 5 + drivers/iommu/dmar.c | 19 +- drivers/iommu/intel_irq_remapping.c | 470 +++++++++++++++++++--------- drivers/iommu/irq_remapping.c | 227 +++++--------- drivers/iommu/irq_remapping.h | 23 +- drivers/pci/htirq.c | 48 +-- include/linux/dmar.h | 3 +- include/linux/htirq.h | 22 +- include/linux/intel-iommu.h | 4 + include/linux/irq.h | 10 + include/linux/irqdomain.h | 81 +++++ kernel/irq/Kconfig | 4 + kernel/irq/chip.c | 20 ++ kernel/irq/irqdomain.c | 373 +++++++++++++++++++++- 33 files changed, 2319 insertions(+), 935 deletions(-) -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
