9e2c986cb4
We've unfortunately started seeing a situation where percpu interrupts are partitioned in the system: one arbitrary set of CPUs has an interrupt connected to a type of device, while another disjoint set of CPUs has the same interrupt connected to another type of device. This makes it impossible to have a device driver requesting this interrupt using the current percpu-interrupt abstraction, as the same interrupt number is now potentially claimed by at least two drivers, and we forbid interrupt sharing on per-cpu interrupt. A solution to this is to turn things upside down. Let's assume that our system describes all the possible partitions for a given interrupt, and give each of them a unique identifier. It is then possible to create a namespace where the affinity identifier itself is a form of interrupt number. At this point, it becomes easy to implement a set of partitions as a cascaded irqchip, each affinity identifier being the HW irq. This allows us to keep a number of nice properties: - Each partition results in a separate percpu-interrupt (with a restrictied affinity), which keeps drivers happy. - Because the underlying interrupt is still per-cpu, the overhead of the indirection can be kept pretty minimal. - The core code can ignore most of that crap. For that purpose, we implement a small library that deals with some of the boilerplate code, relying on platform-specific drivers to provide a description of the affinity sets and a set of callbacks. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: devicetree@vger.kernel.org Cc: Jason Cooper <jason@lakedaemon.net> Cc: Will Deacon <will.deacon@arm.com> Cc: Rob Herring <robh+dt@kernel.org> Link: http://lkml.kernel.org/r/1460365075-7316-4-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
250 lines
4.0 KiB
Plaintext
250 lines
4.0 KiB
Plaintext
config IRQCHIP
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def_bool y
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depends on OF_IRQ
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config ARM_GIC
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bool
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select IRQ_DOMAIN
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select IRQ_DOMAIN_HIERARCHY
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select MULTI_IRQ_HANDLER
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config ARM_GIC_MAX_NR
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int
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default 2 if ARCH_REALVIEW
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default 1
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config ARM_GIC_V2M
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bool
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depends on ARM_GIC
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depends on PCI && PCI_MSI
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select PCI_MSI_IRQ_DOMAIN
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config GIC_NON_BANKED
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bool
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config ARM_GIC_V3
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bool
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select IRQ_DOMAIN
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select MULTI_IRQ_HANDLER
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select IRQ_DOMAIN_HIERARCHY
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config ARM_GIC_V3_ITS
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bool
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select PCI_MSI_IRQ_DOMAIN
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config ARM_NVIC
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bool
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select IRQ_DOMAIN
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select IRQ_DOMAIN_HIERARCHY
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select GENERIC_IRQ_CHIP
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config ARM_VIC
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bool
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select IRQ_DOMAIN
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select MULTI_IRQ_HANDLER
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config ARM_VIC_NR
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int
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default 4 if ARCH_S5PV210
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default 2
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depends on ARM_VIC
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help
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The maximum number of VICs available in the system, for
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power management.
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config ARMADA_370_XP_IRQ
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bool
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select GENERIC_IRQ_CHIP
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select PCI_MSI_IRQ_DOMAIN if PCI_MSI
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config ALPINE_MSI
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bool
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depends on PCI && PCI_MSI
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select GENERIC_IRQ_CHIP
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select PCI_MSI_IRQ_DOMAIN
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config ATMEL_AIC_IRQ
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bool
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select GENERIC_IRQ_CHIP
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select IRQ_DOMAIN
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select MULTI_IRQ_HANDLER
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select SPARSE_IRQ
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config ATMEL_AIC5_IRQ
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bool
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select GENERIC_IRQ_CHIP
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select IRQ_DOMAIN
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select MULTI_IRQ_HANDLER
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select SPARSE_IRQ
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config I8259
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bool
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select IRQ_DOMAIN
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config BCM6345_L1_IRQ
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bool
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select GENERIC_IRQ_CHIP
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select IRQ_DOMAIN
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config BCM7038_L1_IRQ
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bool
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select GENERIC_IRQ_CHIP
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select IRQ_DOMAIN
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config BCM7120_L2_IRQ
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bool
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select GENERIC_IRQ_CHIP
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select IRQ_DOMAIN
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config BRCMSTB_L2_IRQ
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bool
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select GENERIC_IRQ_CHIP
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select IRQ_DOMAIN
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config DW_APB_ICTL
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bool
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select GENERIC_IRQ_CHIP
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select IRQ_DOMAIN
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config HISILICON_IRQ_MBIGEN
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bool
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select ARM_GIC_V3
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select ARM_GIC_V3_ITS
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select GENERIC_MSI_IRQ_DOMAIN
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config IMGPDC_IRQ
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bool
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select GENERIC_IRQ_CHIP
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select IRQ_DOMAIN
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config IRQ_MIPS_CPU
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bool
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select GENERIC_IRQ_CHIP
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select IRQ_DOMAIN
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config CLPS711X_IRQCHIP
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bool
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depends on ARCH_CLPS711X
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select IRQ_DOMAIN
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select MULTI_IRQ_HANDLER
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select SPARSE_IRQ
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default y
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config OR1K_PIC
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bool
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select IRQ_DOMAIN
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config OMAP_IRQCHIP
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bool
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select GENERIC_IRQ_CHIP
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select IRQ_DOMAIN
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config ORION_IRQCHIP
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bool
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select IRQ_DOMAIN
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select MULTI_IRQ_HANDLER
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config PIC32_EVIC
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bool
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select GENERIC_IRQ_CHIP
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select IRQ_DOMAIN
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config RENESAS_INTC_IRQPIN
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bool
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select IRQ_DOMAIN
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config RENESAS_IRQC
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bool
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select GENERIC_IRQ_CHIP
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select IRQ_DOMAIN
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config ST_IRQCHIP
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bool
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select REGMAP
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select MFD_SYSCON
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help
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Enables SysCfg Controlled IRQs on STi based platforms.
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config TANGO_IRQ
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bool
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select IRQ_DOMAIN
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select GENERIC_IRQ_CHIP
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config TB10X_IRQC
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bool
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select IRQ_DOMAIN
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select GENERIC_IRQ_CHIP
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config TS4800_IRQ
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tristate "TS-4800 IRQ controller"
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select IRQ_DOMAIN
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depends on HAS_IOMEM
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depends on SOC_IMX51 || COMPILE_TEST
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help
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Support for the TS-4800 FPGA IRQ controller
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config VERSATILE_FPGA_IRQ
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bool
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select IRQ_DOMAIN
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config VERSATILE_FPGA_IRQ_NR
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int
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default 4
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depends on VERSATILE_FPGA_IRQ
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config XTENSA_MX
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bool
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select IRQ_DOMAIN
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config IRQ_CROSSBAR
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bool
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help
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Support for a CROSSBAR ip that precedes the main interrupt controller.
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The primary irqchip invokes the crossbar's callback which inturn allocates
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a free irq and configures the IP. Thus the peripheral interrupts are
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routed to one of the free irqchip interrupt lines.
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config KEYSTONE_IRQ
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tristate "Keystone 2 IRQ controller IP"
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depends on ARCH_KEYSTONE
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help
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Support for Texas Instruments Keystone 2 IRQ controller IP which
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is part of the Keystone 2 IPC mechanism
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config MIPS_GIC
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bool
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select GENERIC_IRQ_IPI
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select IRQ_DOMAIN_HIERARCHY
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select MIPS_CM
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config INGENIC_IRQ
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bool
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depends on MACH_INGENIC
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default y
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config RENESAS_H8300H_INTC
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bool
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select IRQ_DOMAIN
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config RENESAS_H8S_INTC
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bool
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select IRQ_DOMAIN
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config IMX_GPCV2
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bool
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select IRQ_DOMAIN
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help
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Enables the wakeup IRQs for IMX platforms with GPCv2 block
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config IRQ_MXS
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def_bool y if MACH_ASM9260 || ARCH_MXS
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select IRQ_DOMAIN
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select STMP_DEVICE
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config MVEBU_ODMI
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bool
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select GENERIC_MSI_IRQ_DOMAIN
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config PARTITION_PERCPU
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bool
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