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Message-ID: <54227CF1.6020305@jp.fujitsu.com> Date: Wed, 24 Sep 2014 17:12:33 +0900 From: Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com> To: Jiang Liu <jiang.liu@...ux.intel.com>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, "Rafael J. Wysocki" <rjw@...ysocki.net>, Bjorn Helgaas <bhelgaas@...gle.com>, Randy Dunlap <rdunlap@...radead.org>, Yinghai Lu <yinghai@...nel.org>, Borislav Petkov <bp@...en8.de>, Grant Likely <grant.likely@...aro.org>, Marc Zyngier <marc.zyngier@....com> CC: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>, Andrew Morton <akpm@...ux-foundation.org>, Tony Luck <tony.luck@...el.com>, Joerg Roedel <joro@...tes.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, <x86@...nel.org>, <linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>, <linux-acpi@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org> Subject: Re: [RFC Part2 v1 00/21] Enable hierarchy irqdomian on x86 platforms (2014/09/24 17:10), Jiang Liu wrote: > > > On 2014/9/24 15:59, Yasuaki Ishimatsu wrote: >> (2014/09/11 23:03), Jiang Liu wrote: >>> 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. >> >> Do you have a documentation which more detailed information is written? >> I'm interested in this feature. And I want to know more detailed information. >> >> I cannot imagine why the feature makes x86 irq architecture much more clear >> and more easy to maintain in this description. Of course, I have read the >> following threads: >> >> https://lkml.org/lkml/2014/9/11/101 > Hi Yasuaki, > > Do these help? > http://www.mail-archive.com/linux-kernel@vger.kernel.org/msg729924.html > https://lkml.org/lkml/2014/8/1/67 Thank you for the information. I'll read it. Thanks, Yasuaki Ishimatsu > > Regards! > Gerry > >> >> Thanks, >> Yasuaki Ishimatsu >> >>> >>> 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/2014/9/11/101 >>> And you may access it at: >>> https://github.com/jiangliu/linux.git irqdomain/p2v1 >>> >>> 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 14-17 converts HPET, MSI and HT_IRQ drivers to support hierarchy >>> irqdomain. >>> Patch 18-21 cleans up unsued code in x86 arch and interrupt remapping >>> drivers. >>> >>> We have tested this patchset on Intel 32-bit and 64-bit systems. But we >>> have only done compilation tests for HT_IRQ and AMD interrupt remapping >>> drivers due to hardware resource limitation. Tests on AMD platforms are >>> warmly welcomed! >>> >>> Jiang Liu (21): >>> 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 >>> x86, htirq: Use hierarchy irqdomain to manage Hypertransport >>> interrupts >>> 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 >>> >>> arch/x86/Kconfig | 3 +- >>> arch/x86/include/asm/hpet.h | 16 +- >>> arch/x86/include/asm/hw_irq.h | 64 +++++ >>> arch/x86/include/asm/irq_remapping.h | 66 +++-- >>> arch/x86/include/asm/pci.h | 5 - >>> arch/x86/include/asm/x86_init.h | 4 - >>> arch/x86/kernel/apic/htirq.c | 179 +++++++++---- >>> arch/x86/kernel/apic/io_apic.c | 3 - >>> arch/x86/kernel/apic/msi.c | 430 +++++++++++++++++++++++-------- >>> arch/x86/kernel/apic/vector.c | 158 +++++++++++- >>> arch/x86/kernel/hpet.c | 57 ++--- >>> arch/x86/kernel/x86_init.c | 2 - >>> arch/x86/platform/uv/uv_irq.c | 27 +- >>> drivers/iommu/amd_iommu.c | 385 ++++++++++++++++++++++------ >>> drivers/iommu/amd_iommu_init.c | 4 + >>> drivers/iommu/amd_iommu_proto.h | 9 + >>> drivers/iommu/amd_iommu_types.h | 5 + >>> drivers/iommu/intel_irq_remapping.c | 468 +++++++++++++++++++++++----------- >>> drivers/iommu/irq_remapping.c | 221 ++++++---------- >>> drivers/iommu/irq_remapping.h | 22 +- >>> drivers/pci/htirq.c | 48 +--- >>> include/linux/htirq.h | 22 +- >>> include/linux/intel-iommu.h | 4 + >>> include/linux/irq.h | 8 + >>> include/linux/irqdomain.h | 60 +++++ >>> kernel/irq/Kconfig | 3 + >>> kernel/irq/chip.c | 21 ++ >>> kernel/irq/irqdomain.c | 349 ++++++++++++++++++++++++- >>> 28 files changed, 1934 insertions(+), 709 deletions(-) >>> >> >> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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