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    Subject[PATCH v2 0/8] irqchip/gic-v3-its: Implement ITS nodes as kernel devices and use CMA
    Date
    This patch series implements ITS nodes as kernel devices. The
    advantage of that is that CMA can be used to allocate large ITS
    tables, where standard memory and page allocation fails (above
    MAX_ORDER - 1). This approach was suggested first here:

    https://marc.info/?i=56D44812.6000309%40arm.com

    Another advantage is that all memory resources of the device are now
    device managed, thus the code for releasing the device becomes much
    easier.

    The following is required to implement this:

    * each ITS node must be assigned to a struct device each,

    * the ITS initialization must be moved to a later point during boot,

    * the ITS enablement must be separated from the GIC code (the GIC
    still needs to be enabled early),

    * the early ITS node probing by DT or ACPI must be separated from the
    ITS initialization,

    * ITS table allocation must be changed to use dma_alloc_coherent()
    which uses CMA for allocation of large memory ranges.

    V2:
    * rebased onto v4.11-rc1,
    * fixed syntax error in its_init() function (split probing patch),
    * added comment in its_create_device(),
    * fixed GITS_BASER_PAGE_SIZE_MASK usage in its_setup_baser()


    Robert Richter (8):
    irqchip/gic-v3-its: Initialize its nodes in probe order
    irqchip/gic-v3-its: Initialize MSIs with subsys_initcalls
    irqchip/gic-v3-its: Split probing from its node initialization
    irqchip/gic-v3-its: Decouple its initialization from gic
    irqchip/gic-v3-its: Prevent its init ordering dependencies
    irqchip/gic-v3-its: Initialize its nodes later
    irqchip/gic-v3-its: Handle its nodes as kernel devices
    irqchip, gicv3-its, cma: Use CMA for allocation of large device tables

    drivers/irqchip/irq-gic-v3-its-pci-msi.c | 6 +-
    drivers/irqchip/irq-gic-v3-its-platform-msi.c | 6 +-
    drivers/irqchip/irq-gic-v3-its.c | 276 ++++++++++++++++----------
    drivers/irqchip/irq-gic-v3.c | 8 +-
    include/linux/cpuhotplug.h | 1 +
    include/linux/irqchip/arm-gic-v3.h | 5 +-
    6 files changed, 186 insertions(+), 116 deletions(-)

    --
    2.11.0

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