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  Nvlink2: Additional patches

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Yakkety:
  Fix Committed

Bug description:
  Hello Canonical,

  Could you please integrate the patches to enable NVLink2 in Ubuntu?

  They are, so far:

   commit 616badd2fb499320d3ac3b54462f55dededd0e0f
    Author: Alistair Popple <>
    Date:   Tue Jan 10 15:41:44 2017 +1100

        powerpc/powernv: Use OPAL call for TCE kill on NVLink2

        Add detection of NPU2 PHBs. NPU2/NVLink2 has a different register
        layout for the TCE kill register therefore TCE invalidation should be
        done via the OPAL call rather than using the register directly as it
        is for PHB3 and NVLink1. This changes TCE invalidation to use the OPAL
        call in the case of a NPU2 PHB model.

  commit 1d0761d2557d1540727723e4f05395d53321d555
  Author: Alistair Popple <>
  Date:   Wed Dec 14 13:36:51 2016 +1100

      powerpc/powernv: Initialise nest mmu
      POWER9 contains an off core mmu called the nest mmu (NMMU). This is
      used by other hardware units on the chip to translate virtual
      addresses into real addresses. The unit attempting an address
      translation provides the majority of the context required for the
      translation request except for the base address of the partition table
      (ie. the PTCR) which needs to be programmed into the NMMU.
      This patch adds a call to OPAL to set the PTCR for the nest mmu in

  These patches are, still, in the powerpc-next tree.

  == Comment: #2 - Breno Henrique Leitao <> - 2017-02-22 
13:33:59 ==
  In order to support NVLink2, the memory hotplugs should be applied also, they 

  0d0a4bc powerpc/mm: unstub radix__vmemmap_remove_mapping()
  4b5d62c powerpc/mm: add radix__remove_section_mapping()
  6cc2734 powerpc/mm: add radix__create_section_mapping()
  b5200ec powerpc/mm: refactor radix physical page mapping
  32b53c0 powerpc/mm: Fix memory hotplug BUG() on radix
  c3352cb dt: add documentation of "hotpluggable" memory property
  41a9ada of/fdt: mark hotpluggable memory
  114cf3c mm: enable CONFIG_MOVABLE_NODE on non-x86 arches
  39fa104 mm: remove x86-only restriction of movable_node
  4a3bac4 powerpc/mm: allow memory hotplug into a memoryless node

  Note that you need to set CONFIG_MOVABLE_NODE=y.

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