Hi Jason, First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 0f4498cef9f5cd18d7c6639a2a902ec1edc5be4e commit: 179209fa12709a3df8888c323b37315da2683c24 vfio: IOMMU_API should be selected date: 12 days ago config: powerpc64-randconfig-r014-20210328 (attached as .config) compiler: powerpc64le-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=179209fa12709a3df8888c323b37315da2683c24 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 179209fa12709a3df8888c323b37315da2683c24 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> All errors (new ones prefixed by >>): drivers/vfio/pci/vfio_pci_nvlink2.c: In function 'vfio_pci_nvgpu_release': >> drivers/vfio/pci/vfio_pci_nvlink2.c:101:10: error: implicit declaration of >> function 'mm_iommu_put'; did you mean 'mm_iommu_init'? >> [-Werror=implicit-function-declaration] 101 | ret = mm_iommu_put(data->mm, data->mem); | ^~~~~~~~~~~~ | mm_iommu_init drivers/vfio/pci/vfio_pci_nvlink2.c: In function 'vfio_pci_nvgpu_mmap': >> drivers/vfio/pci/vfio_pci_nvlink2.c:165:14: error: implicit declaration of >> function 'mm_iommu_newdev' [-Werror=implicit-function-declaration] 165 | ret = (int) mm_iommu_newdev(data->mm, data->useraddr, | ^~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +101 drivers/vfio/pci/vfio_pci_nvlink2.c 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 91 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 92 static void vfio_pci_nvgpu_release(struct vfio_pci_device *vdev, 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 93 struct vfio_pci_region *region) 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 94 { 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 95 struct vfio_pci_nvgpu_data *data = region->data; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 96 long ret; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 97 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 98 /* If there were any mappings at all... */ 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 99 if (data->mm) { 338b4e10f939a7 Alexey Kardashevskiy 2019-12-23 100 if (data->mem) { 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 @101 ret = mm_iommu_put(data->mm, data->mem); 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 102 WARN_ON(ret); 338b4e10f939a7 Alexey Kardashevskiy 2019-12-23 103 } 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 104 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 105 mmdrop(data->mm); 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 106 } 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 107 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 108 vfio_unregister_notifier(&data->gpdev->dev, VFIO_GROUP_NOTIFY, 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 109 &data->group_notifier); 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 110 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 111 pnv_npu2_unmap_lpar_dev(data->gpdev); 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 112 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 113 kfree(data); 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 114 } 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 115 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 116 static vm_fault_t vfio_pci_nvgpu_mmap_fault(struct vm_fault *vmf) 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 117 { 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 118 vm_fault_t ret; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 119 struct vm_area_struct *vma = vmf->vma; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 120 struct vfio_pci_region *region = vma->vm_private_data; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 121 struct vfio_pci_nvgpu_data *data = region->data; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 122 unsigned long vmf_off = (vmf->address - vma->vm_start) >> PAGE_SHIFT; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 123 unsigned long nv2pg = data->gpu_hpa >> PAGE_SHIFT; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 124 unsigned long vm_pgoff = vma->vm_pgoff & 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 125 ((1U << (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT)) - 1); 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 126 unsigned long pfn = nv2pg + vm_pgoff + vmf_off; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 127 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 128 ret = vmf_insert_pfn(vma, vmf->address, pfn); 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 129 trace_vfio_pci_nvgpu_mmap_fault(data->gpdev, pfn << PAGE_SHIFT, 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 130 vmf->address, ret); 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 131 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 132 return ret; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 133 } 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 134 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 135 static const struct vm_operations_struct vfio_pci_nvgpu_mmap_vmops = { 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 136 .fault = vfio_pci_nvgpu_mmap_fault, 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 137 }; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 138 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 139 static int vfio_pci_nvgpu_mmap(struct vfio_pci_device *vdev, 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 140 struct vfio_pci_region *region, struct vm_area_struct *vma) 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 141 { 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 142 int ret; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 143 struct vfio_pci_nvgpu_data *data = region->data; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 144 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 145 if (data->useraddr) 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 146 return -EPERM; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 147 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 148 if (vma->vm_end - vma->vm_start > data->size) 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 149 return -EINVAL; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 150 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 151 vma->vm_private_data = region; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 152 vma->vm_flags |= VM_PFNMAP; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 153 vma->vm_ops = &vfio_pci_nvgpu_mmap_vmops; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 154 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 155 /* 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 156 * Calling mm_iommu_newdev() here once as the region is not 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 157 * registered yet and therefore right initialization will happen now. 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 158 * Other places will use mm_iommu_find() which returns 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 159 * registered @mem and does not go gup(). 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 160 */ 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 161 data->useraddr = vma->vm_start; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 162 data->mm = current->mm; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 163 bb3d3cf928d4cc Julia Lawall 2019-12-29 164 mmgrab(data->mm); 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 @165 ret = (int) mm_iommu_newdev(data->mm, data->useraddr, e66e02c4d96d33 Peng Hao 2019-07-02 166 vma_pages(vma), data->gpu_hpa, &data->mem); 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 167 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 168 trace_vfio_pci_nvgpu_mmap(vdev->pdev, data->gpu_hpa, data->useraddr, 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 169 vma->vm_end - vma->vm_start, ret); 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 170 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 171 return ret; 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 172 } 7f92891778dff6 Alexey Kardashevskiy 2018-12-20 173 :::::: The code at line 101 was first introduced by commit :::::: 7f92891778dff62303c070ac81de7b7d80de331a vfio_pci: Add NVIDIA GV100GL [Tesla V100 SXM2] subdriver :::::: TO: Alexey Kardashevskiy <[email protected]> :::::: CC: Michael Ellerman <[email protected]> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
Description: application/gzip
