Public bug reported: == 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/ ** Affects: ubuntu-power-systems Importance: Undecided Assignee: Canonical Kernel Team (canonical-kernel-team) Status: New ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) Status: New ** Tags: architecture-ppc64le bugnameltc-156217 severity-high targetmilestone-inin16043 ** Tags added: architecture-ppc64le bugnameltc-156217 severity-high targetmilestone-inin16043 ** Changed in: ubuntu Assignee: (unassigned) => Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) ** Package changed: ubuntu => linux (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1701272 Title: New NVLINK2 patches To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1701272/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
