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https://bugs.launchpad.net/bugs/1998380

Title:
  Integrate ARM64 Performance Monitoring Unit Table patches

Status in linux-nvidia package in Ubuntu:
  New

Bug description:
  There are a set of patches on linux-next upstream that are required as
  part of NVIDIA SOC enablement. These patches need to be integrated
  into the Optimized linux-nvidia-5.19 kernel.

  ARM Performance Monitoring Unit Table describes the properties of PMU
  support in ARM-based system. The APMT table contains a list of nodes,
  each represents a PMU in the system that conforms to ARM CoreSight PMU
  architecture. The properties of each node include information required
  to access the PMU (e.g. MMIO base address, interrupt number) and also
  identification. For more detailed information, please refer to the
  specification below:
   * APMT: https://developer.arm.com/documentation/den0117/latest
   * ARM Coresight PMU:
          https://developer.arm.com/documentation/ihi0091/latest

  The initial support adds the detection of APMT table and generic
  infrastructure to create platform devices for ARM CoreSight PMUs.
  Similar to IORT the root pointer of APMT is preserved during runtime
  and each PMU platform device is given a pointer to the corresponding
  APMT node.

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