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Message-ID: <54227C7E.6060506@linux.intel.com> Date: Wed, 24 Sep 2014 16:10:38 +0800 From: Jiang Liu <jiang.liu@...ux.intel.com> To: Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.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 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 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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