** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Changed in: linux (Ubuntu)
Status: New => Triaged
** Changed in: linux (Ubuntu)
Assignee: Taco Screen team (taco-screen-team) => Canonical Kernel Team
(canonical-kernel-team)
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https://bugs.launchpad.net/bugs/1667081
Title:
Nvlink2: Additional patches
Status in linux package in Ubuntu:
Triaged
Bug description:
Hello Canonical,
Could you please integrate the patches to enable NVLink2 in Ubuntu?
They are, so far:
commit 616badd2fb499320d3ac3b54462f55dededd0e0f
Author: Alistair Popple <[email protected]>
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 <[email protected]>
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
opal_init().
These patches are, still, in the powerpc-next tree.
== Comment: #2 - Breno Henrique Leitao <[email protected]> - 2017-02-22
13:33:59 ==
In order to support NVLink2, the memory hotplugs should be applied also, they
are:
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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