Hi Alistair, [auto build test ERROR on powerpc/next] [also build test ERROR on v4.13-rc4 next-20170811] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Alistair-Popple/powerpc-powernv-npu-Move-tlb-flush-before-launching-ATSD/20170813-211752 base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next config: powerpc-defconfig (attached as .config) compiler: powerpc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=powerpc All errors (new ones prefixed by >>): arch/powerpc/platforms/powernv/npu-dma.c: In function 'pnv_npu2_init_context': >> arch/powerpc/platforms/powernv/npu-dma.c:746:3: error: implicit declaration >> of function 'mm_context_set_global_tlbi' >> [-Werror=implicit-function-declaration] mm_context_set_global_tlbi(&mm->context); ^~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors vim +/mm_context_set_global_tlbi +746 arch/powerpc/platforms/powernv/npu-dma.c 652 653 /* 654 * Call into OPAL to setup the nmmu context for the current task in 655 * the NPU. This must be called to setup the context tables before the 656 * GPU issues ATRs. pdev should be a pointed to PCIe GPU device. 657 * 658 * A release callback should be registered to allow a device driver to 659 * be notified that it should not launch any new translation requests 660 * as the final TLB invalidate is about to occur. 661 * 662 * Returns an error if there no contexts are currently available or a 663 * npu_context which should be passed to pnv_npu2_handle_fault(). 664 * 665 * mmap_sem must be held in write mode. 666 */ 667 struct npu_context *pnv_npu2_init_context(struct pci_dev *gpdev, 668 unsigned long flags, 669 struct npu_context *(*cb)(struct npu_context *, void *), 670 void *priv) 671 { 672 int rc; 673 u32 nvlink_index; 674 struct device_node *nvlink_dn; 675 struct mm_struct *mm = current->mm; 676 struct pnv_phb *nphb; 677 struct npu *npu; 678 struct npu_context *npu_context; 679 680 /* 681 * At present we don't support GPUs connected to multiple NPUs and I'm 682 * not sure the hardware does either. 683 */ 684 struct pci_dev *npdev = pnv_pci_get_npu_dev(gpdev, 0); 685 686 if (!firmware_has_feature(FW_FEATURE_OPAL)) 687 return ERR_PTR(-ENODEV); 688 689 if (!npdev) 690 /* No nvlink associated with this GPU device */ 691 return ERR_PTR(-ENODEV); 692 693 if (!mm || mm->context.id == 0) { 694 /* 695 * Kernel thread contexts are not supported and context id 0 is 696 * reserved on the GPU. 697 */ 698 return ERR_PTR(-EINVAL); 699 } 700 701 nphb = pci_bus_to_host(npdev->bus)->private_data; 702 npu = &nphb->npu; 703 704 /* 705 * Setup the NPU context table for a particular GPU. These need to be 706 * per-GPU as we need the tables to filter ATSDs when there are no 707 * active contexts on a particular GPU. 708 */ 709 rc = opal_npu_init_context(nphb->opal_id, mm->context.id, flags, 710 PCI_DEVID(gpdev->bus->number, gpdev->devfn)); 711 if (rc < 0) 712 return ERR_PTR(-ENOSPC); 713 714 /* 715 * We store the npu pci device so we can more easily get at the 716 * associated npus. 717 */ 718 npu_context = mm->context.npu_context; 719 if (!npu_context) { 720 npu_context = kzalloc(sizeof(struct npu_context), GFP_KERNEL); 721 if (!npu_context) 722 return ERR_PTR(-ENOMEM); 723 724 mm->context.npu_context = npu_context; 725 npu_context->mm = mm; 726 npu_context->mn.ops = &nv_nmmu_notifier_ops; 727 __mmu_notifier_register(&npu_context->mn, mm); 728 kref_init(&npu_context->kref); 729 } else { 730 kref_get(&npu_context->kref); 731 } 732 733 npu_context->release_cb = cb; 734 npu_context->priv = priv; 735 nvlink_dn = of_parse_phandle(npdev->dev.of_node, "ibm,nvlink", 0); 736 if (WARN_ON(of_property_read_u32(nvlink_dn, "ibm,npu-link-index", 737 &nvlink_index))) 738 return ERR_PTR(-ENODEV); 739 npu_context->npdev[npu->index][nvlink_index] = npdev; 740 741 if (!nphb->npu.nmmu_flush) 742 /* 743 * If we're not explicitly flushing ourselves we need to mark 744 * the thread for global flushes 745 */ > 746 mm_context_set_global_tlbi(&mm->context); 747 748 return npu_context; 749 } 750 EXPORT_SYMBOL(pnv_npu2_init_context); 751 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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