Eric Lee / smarc-fsl-linux-kernel

07 Nov, 2019

2 commits

  • a6c7f4c6a   device-dax: Add a driver for "hmem" devices ... Browse Code »

    Platform firmware like EFI/ACPI may publish "hmem" platform devices.
    Such a device is a performance differentiated memory range likely
    reserved for an application specific use case. The driver gives access
    to 100% of the capacity via a device-dax mmap instance by default.

    However, if over-subscription and other kernel memory management is
    desired the resulting dax device can be assigned to the core-mm via the
    kmem driver.

    This consumes "hmem" devices the producer of "hmem" devices is saved for
    a follow-on patch so that it can reference the new CONFIG_DEV_DAX_HMEM
    symbol to gate performing the enumeration work.

    Reported-by: kbuild test robot
    Reviewed-by: Dave Hansen
    Signed-off-by: Dan Williams
    Acked-by: Thomas Gleixner
    Signed-off-by: Rafael J. Wysocki

    Dan Williams
     
  • 33dd70752   lib: Uplevel the pmem "region" ida to a global allocator ... Browse Code »

    In preparation for handling platform differentiated memory types beyond
    persistent memory, uplevel the "region" identifier to a global number
    space. This enables a device-dax instance to be registered to any memory
    type with guaranteed unique names.

    Signed-off-by: Dan Williams
    Acked-by: Thomas Gleixner
    Signed-off-by: Rafael J. Wysocki

    Dan Williams