Joerg Roedel <j...@8bytes.org> writes: > Hello Michael, > > On Wed, Aug 23, 2017 at 10:17:39PM +1000, Michael Ellerman wrote: > >> [ 0.358192] Call Trace: >> [ 0.360624] [c0000000f7173680] [c0000000f7173710] 0xc0000000f7173710 >> (unreliable) >> [ 0.368088] [c0000000f7173710] [c0000000002abf7c] >> .kernfs_find_and_get_ns+0x4c/0x7c >> [ 0.375729] [c0000000f71737a0] [c0000000002b13c8] >> .sysfs_add_link_to_group+0x44/0x9c >> [ 0.383456] [c0000000f7173840] [c000000000591660] >> .iommu_device_link+0x70/0x144 >> [ 0.390744] [c0000000f71738e0] [c0000000005942dc] >> .fsl_pamu_add_device+0x4c/0x80 >> [ 0.398121] [c0000000f7173960] [c00000000058ce8c] >> .add_iommu_group+0x5c/0x9c >> [ 0.405153] [c0000000f71739e0] [c00000000059d6b8] >> .bus_for_each_dev+0x98/0xfc >> [ 0.412269] [c0000000f7173a80] [c00000000058f1a0] >> .bus_set_iommu+0xd8/0x11c >> [ 0.419218] [c0000000f7173b20] [c000000000d86998] >> .pamu_domain_init+0xb0/0xe0 >> [ 0.426331] [c0000000f7173ba0] [c000000000d86864] >> .fsl_pamu_init+0xec/0x170 >> [ 0.433276] [c0000000f7173c30] [c000000000001934] >> .do_one_initcall+0x68/0x1b8 >> [ 0.440395] [c0000000f7173d00] [c000000000d440e4] >> .kernel_init_freeable+0x24c/0x324 >> [ 0.448031] [c0000000f7173db0] [c000000000001b90] .kernel_init+0x20/0x140 >> [ 0.454801] [c0000000f7173e30] [c0000000000009bc] >> .ret_from_kernel_thread+0x58/0x9c >> [ 0.462438] Instruction dump: >> [ 0.465390] 7c0802a6 fb81ffe0 f8010010 fba1ffe8 fbc1fff0 fbe1fff8 >> f821ff71 7c7e1b78 >> [ 0.473114] 7cbd2b78 7c9c2378 60000000 60000000 <a13e0068> 311dffff >> ebfe0048 552906b4 >> [ 0.481017] ---[ end trace 5d11d3e6c29380bd ]--- > > Thanks for the report, this looks like an initialization ordering > problem.
Yes I suspect so. > Can you please try the attached patch? Thanks, that works. It boots happily, much later in boot I see these messages: [ 2.085616] iommu: Adding device ffe301000.jr to group 9 [ 2.091101] iommu: Adding device ffe302000.jr to group 10 [ 2.096633] iommu: Adding device ffe303000.jr to group 11 [ 2.102161] iommu: Adding device ffe304000.jr to group 12 In /sys I see: root@p5020ds:~# ls -l /sys/class/iommu/iommu0 lrwxrwxrwx 1 root root 0 Aug 24 12:01 /sys/class/iommu/iommu0 -> ../../devices/virtual/iommu/iommu0 And: root@p5020ds:~# ls -l /sys/devices/virtual/iommu/iommu0/devices/ total 0 lrwxrwxrwx 1 root root 0 Aug 24 12:02 0000:00:00.0 -> ../../../../platform/ffe200000.pcie/pci0000:00/0000:00:00.0 lrwxrwxrwx 1 root root 0 Aug 24 12:02 2000:00:00.0 -> ../../../../platform/ffe202000.pcie/pci2000:00/2000:00:00.0 lrwxrwxrwx 1 root root 0 Aug 24 12:02 2000:01:00.0 -> ../../../../platform/ffe202000.pcie/pci2000:00/2000:00:00.0/2000:01:00.0 lrwxrwxrwx 1 root root 0 Aug 24 12:02 2000:01:00.1 -> ../../../../platform/ffe202000.pcie/pci2000:00/2000:00:00.0/2000:01:00.1 lrwxrwxrwx 1 root root 0 Aug 24 12:02 ffe100300.dma -> ../../../../platform/ffe000000.soc/ffe100300.dma lrwxrwxrwx 1 root root 0 Aug 24 12:02 ffe101300.dma -> ../../../../platform/ffe000000.soc/ffe101300.dma lrwxrwxrwx 1 root root 0 Aug 24 12:02 ffe114000.sdhc -> ../../../../platform/ffe000000.soc/ffe114000.sdhc lrwxrwxrwx 1 root root 0 Aug 24 12:02 ffe200000.pcie -> ../../../../platform/ffe200000.pcie lrwxrwxrwx 1 root root 0 Aug 24 12:02 ffe202000.pcie -> ../../../../platform/ffe202000.pcie lrwxrwxrwx 1 root root 0 Aug 24 12:02 ffe210000.usb -> ../../../../platform/ffe000000.soc/ffe210000.usb lrwxrwxrwx 1 root root 0 Aug 24 12:02 ffe211000.usb -> ../../../../platform/ffe000000.soc/ffe211000.usb lrwxrwxrwx 1 root root 0 Aug 24 12:02 ffe220000.sata -> ../../../../platform/ffe000000.soc/ffe220000.sata lrwxrwxrwx 1 root root 0 Aug 24 12:02 ffe221000.sata -> ../../../../platform/ffe000000.soc/ffe221000.sata lrwxrwxrwx 1 root root 0 Aug 24 12:02 ffe301000.jr -> ../../../../platform/ffe000000.soc/ffe300000.crypto/ffe301000.jr lrwxrwxrwx 1 root root 0 Aug 24 12:02 ffe302000.jr -> ../../../../platform/ffe000000.soc/ffe300000.crypto/ffe302000.jr lrwxrwxrwx 1 root root 0 Aug 24 12:02 ffe303000.jr -> ../../../../platform/ffe000000.soc/ffe300000.crypto/ffe303000.jr lrwxrwxrwx 1 root root 0 Aug 24 12:02 ffe304000.jr -> ../../../../platform/ffe000000.soc/ffe300000.crypto/ffe304000.jr Which seems like it's working? cheers _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
