** Changed in: linux (Ubuntu)
Status: Fix Committed => Fix Released
** Changed in: ubuntu-power-systems
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1701272
Title:
New NVLINK2 patches
Status in The Ubuntu-power-systems project:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Zesty:
Fix Released
Bug description:
== Comment: #0 - Breno Leitao <[email protected]> - 2017-06-28 16:21:33 ==
Dear Canonical,
These are some important patches we need into 16.04.3. Without these
patches, NVLINK and ATS are broken:
NPU2 requires an extra explicit flush to an active GPU PID when sending
address translation shoot downs (ATSDs) to reliably flush the GPU TLB. This
patch adds just such a flush at the end of each sequence of ATSDs.
We can safely use PID 0 which is always reserved and active on the GPU. PID
0 is only used for init_mm which will never be a user mm on the GPU. To
enforce this we add a check in pnv_npu2_init_context() just in case someone
tries to use PID 0 on the GPU.
http://patchwork.ozlabs.org/patch/778160/
"4c3b89e powerpc/powernv: Add sanity checks to pnv_pci_get_{gpu|npu}_dev"
introduced explicit warnings in pnv_pci_get_npu_dev() when a PCIe device
has no associated device-tree node. However not all PCIe devices have an
of_node and pnv_pci_get_npu_dev() gets indirectly called at least once for
every PCIe device in the system. This results in spurious WARN_ON()'s so
remove it.
http://patchwork.ozlabs.org/patch/775595/
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