关键点分析

如何查看设备有几个主桥

  1. dmesg 可以看到(acpi_pci_root_add函数打印)出现了：
  2. [    0.181405] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-16])  # [PCIn] [bus 00-16], 那么00就是root的BUS号
  3. [    0.181405] ACPI: PCI Root Bridge [PCI1] (domain 0000 [bus 17-ff])  # [PCIn] [bus 17-fe], 那么17就是root的BUS号
  4. ......
  6. 可以看到  PC1 已经枚举到bus ff了，那么支持2个主桥

内核启动打印分析（重点）

  1. acpi PNP0A08:00: [Firmware Info]: MMCONFIG for domain 0000 [bus 00-3f] only partially covers this bridge
  4. ### 主桥信息 （前边有分析，可能不止一个主桥，搜索 PCI host bridge 来查看
  5. ### 这里有 [bus 00-ff]  说明当前主桥下表已经覆盖了所有bus （在服务器上，将bus 可能挂载不同的主桥上）
  6. PCI host bridge to bus 0000:00    
  7. pci_bus 0000:00: root bus resource [io  0x0000-0x03af window]
  8. pci_bus 0000:00: root bus resource [io  0x03e0-0x0cf7 window]
  9. pci_bus 0000:00: root bus resource [io  0x03b0-0x03df window]
  10. pci_bus 0000:00: root bus resource [io  0x0d00-0xffff window]
  11. pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
  12. pci_bus 0000:00: root bus resource [mem 0x000c0000-0x000dffff window]
  13. pci_bus 0000:00: root bus resource [mem 0xe0000000-0xfec2ffff window]
  14. pci_bus 0000:00: root bus resource [mem 0xfee00000-0xffffffff window]
  15. pci_bus 0000:00: root bus resource [bus 00-ff]
  17. ### pci_scan_child_bus 开始扫描所有设备，打印分布在pci_setup_device 和 pci_device_add 中
  18. ### 中间也有部分会调用 pci_claim_resource
  19. ### 其实在pci_scan_child_bus->pci_scan_slot->pci_scan_single_device->pci_device_add
  20. ### ->pci_fixup_device->pci_do_fixups->quirk_piix4_acpi->quirk_io_region->pci_claim_resource
  21. ### 调用
  22. pci 0000:00:00.0: [1022:1480] type 00 class 0x060000
  23. pci 0000:00:00.2: [1022:1481] type 00 class 0x080600
  24. pci 0000:00:01.0: [1022:1482] type 00 class 0x060000
  25. pci 0000:00:01.1: [1022:1483] type 01 class 0x060400
  26. pci 0000:00:01.1: enabling Extended Tags
  27. pci 0000:00:01.1: PME# supported from D0 D3hot D3cold
  28. pci 0000:00:01.3: [1022:1483] type 01 class 0x060400
  29. pci 0000:00:01.3: enabling Extended Tags
  30. pci 0000:00:01.3: PME# supported from D0 D3hot D3cold
  31. pci 0000:00:02.0: [1022:1482] type 00 class 0x060000
  32. pci 0000:00:03.0: [1022:1482] type 00 class 0x060000
  33. pci 0000:00:03.1: [1022:1483] type 01 class 0x060400
  34. pci 0000:00:03.1: enabling Extended Tags
  35. pci 0000:00:03.1: PME# supported from D0 D3hot D3cold
  36. pci 0000:00:04.0: [1022:1482] type 00 class 0x060000
  37. pci 0000:00:05.0: [1022:1482] type 00 class 0x060000
  38. pci 0000:00:07.0: [1022:1482] type 00 class 0x060000
  39. pci 0000:00:07.1: [1022:1484] type 01 class 0x060400
  40. pci 0000:00:07.1: enabling Extended Tags
  41. pci 0000:00:07.1: PME# supported from D0 D3hot D3cold
  42. pci 0000:00:08.0: [1022:1482] type 00 class 0x060000
  43. pci 0000:00:08.1: [1022:1484] type 01 class 0x060400
  44. pci 0000:00:08.1: enabling Extended Tags
  45. pci 0000:00:08.1: PME# supported from D0 D3hot D3cold
  46. pci 0000:00:08.2: [1022:1484] type 01 class 0x060400
  47. pci 0000:00:08.2: enabling Extended Tags
  48. pci 0000:00:08.2: PME# supported from D0 D3hot D3cold
  49. pci 0000:00:08.3: [1022:1484] type 01 class 0x060400
  50. pci 0000:00:08.3: enabling Extended Tags
  51. pci 0000:00:08.3: PME# supported from D0 D3hot D3cold
  52. pci 0000:00:14.0: [1022:790b] type 00 class 0x0c0500
  53. pci 0000:00:14.3: [1022:790e] type 00 class 0x060100
  54. pci 0000:00:18.0: [1022:1440] type 00 class 0x060000
  55. pci 0000:00:18.1: [1022:1441] type 00 class 0x060000
  56. pci 0000:00:18.2: [1022:1442] type 00 class 0x060000
  57. pci 0000:00:18.3: [1022:1443] type 00 class 0x060000
  58. pci 0000:00:18.4: [1022:1444] type 00 class 0x060000
  59. pci 0000:00:18.5: [1022:1445] type 00 class 0x060000
  60. pci 0000:00:18.6: [1022:1446] type 00 class 0x060000
  61. pci 0000:00:18.7: [1022:1447] type 00 class 0x060000
  62. pci 0000:01:00.0: [15b7:5006] type 00 class 0x010802
  63. pci 0000:01:00.0: reg 0x10: [mem 0xf7b00000-0xf7b03fff 64bit]
  64. pci 0000:01:00.0: reg 0x20: [mem 0xf7b04000-0xf7b040ff 64bit]
  65. pci 0000:00:01.1: PCI bridge to [bus 01]
  66. pci 0000:00:01.1:   bridge window [mem 0xf7b00000-0xf7bfffff]
  67. pci 0000:03:00.0: [1022:43d5] type 00 class 0x0c0330
  68. pci 0000:03:00.0: reg 0x10: [mem 0xf73a0000-0xf73a7fff 64bit]
  69. pci 0000:03:00.0: enabling Extended Tags
  70. pci 0000:03:00.0: PME# supported from D3hot D3cold
  71. pci 0000:03:00.1: [1022:43c8] type 00 class 0x010601
  72. pci 0000:03:00.1: reg 0x24: [mem 0xf7380000-0xf739ffff]
  73. pci 0000:03:00.1: reg 0x30: [mem 0xf7300000-0xf737ffff pref]
  74. pci 0000:03:00.1: enabling Extended Tags
  75. pci 0000:03:00.1: PME# supported from D3hot D3cold
  76. pci 0000:03:00.2: [1022:43c6] type 01 class 0x060400
  77. pci 0000:03:00.2: enabling Extended Tags
  78. pci 0000:03:00.2: PME# supported from D3hot D3cold
  79. pci 0000:00:01.3: PCI bridge to [bus 03-25]
  80. pci 0000:00:01.3:   bridge window [io  0xe000-0xffff]
  81. pci 0000:00:01.3:   bridge window [mem 0xf6000000-0xf73fffff]
  82. pci 0000:00:01.3:   bridge window [mem 0xe0000000-0xf1ffffff 64bit pref]
  83. pci 0000:20:00.0: [1022:43c7] type 01 class 0x060400
  84. pci 0000:20:00.0: enabling Extended Tags
  85. pci 0000:20:00.0: PME# supported from D3hot D3cold
  86. pci 0000:20:01.0: [1022:43c7] type 01 class 0x060400
  87. pci 0000:20:01.0: enabling Extended Tags
  88. pci 0000:20:01.0: PME# supported from D3hot D3cold
  89. pci 0000:20:04.0: [1022:43c7] type 01 class 0x060400
  90. pci 0000:20:04.0: enabling Extended Tags
  91. pci 0000:20:04.0: PME# supported from D3hot D3cold
  92. pci 0000:03:00.2: PCI bridge to [bus 20-25]
  93. pci 0000:03:00.2:   bridge window [io  0xe000-0xffff]
  94. pci 0000:03:00.2:   bridge window [mem 0xf6000000-0xf72fffff]
  95. pci 0000:03:00.2:   bridge window [mem 0xe0000000-0xf1ffffff 64bit pref]
  96. pci 0000:20:00.0: PCI bridge to [bus 21]
  97. pci 0000:22:00.0: [10ec:8168] type 00 class 0x020000
  98. pci 0000:22:00.0: reg 0x10: [io  0xf000-0xf0ff]
  99. pci 0000:22:00.0: reg 0x18: [mem 0xf7204000-0xf7204fff 64bit]
  100. pci 0000:22:00.0: reg 0x20: [mem 0xf7200000-0xf7203fff 64bit]
  101. pci 0000:22:00.0: supports D1 D2
  102. pci 0000:22:00.0: PME# supported from D0 D1 D2 D3hot D3cold
  103. pci 0000:20:01.0: PCI bridge to [bus 22]
  104. pci 0000:20:01.0:   bridge window [io  0xf000-0xffff]
  105. pci 0000:20:01.0:   bridge window [mem 0xf7200000-0xf72fffff]
  106. pci 0000:25:00.0: [10de:1f82] type 00 class 0x030000
  107. pci 0000:25:00.0: reg 0x10: [mem 0xf6000000-0xf6ffffff]
  108. pci 0000:25:00.0: reg 0x14: [mem 0xe0000000-0xefffffff 64bit pref]
  109. pci 0000:25:00.0: reg 0x1c: [mem 0xf0000000-0xf1ffffff 64bit pref]
  110. pci 0000:25:00.0: reg 0x24: [io  0xe000-0xe07f]
  111. pci 0000:25:00.0: reg 0x30: [mem 0xf7000000-0xf707ffff pref]
  112. pci 0000:25:00.0: enabling Extended Tags
  113. pci 0000:25:00.0: BAR 3: assigned to efifb
  114. pci 0000:25:00.0: PME# supported from D0 D3hot D3cold
  115. pci 0000:25:00.0: 8.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s x4 link at 0000:20:04.0 (capable of 126.016 Gb/s with 8 GT/s x16 link)
  116. pci 0000:25:00.1: [10de:10fa] type 00 class 0x040300
  117. pci 0000:25:00.1: reg 0x10: [mem 0xf7080000-0xf7083fff]
  118. pci 0000:25:00.1: enabling Extended Tags
  119. pci 0000:20:04.0: PCI bridge to [bus 25]
  120. pci 0000:20:04.0:   bridge window [io  0xe000-0xefff]
  121. pci 0000:20:04.0:   bridge window [mem 0xf6000000-0xf70fffff]
  122. pci 0000:20:04.0:   bridge window [mem 0xe0000000-0xf1ffffff 64bit pref]
  123. pci 0000:26:00.0: [10ee:9032] type 00 class 0x058000
  124. pci 0000:26:00.0: reg 0x10: [mem 0xf7a60000-0xf7a7ffff]
  125. pci 0000:26:00.0: reg 0x18: [mem 0xf7a40000-0xf7a5ffff]
  126. pci 0000:26:00.0: reg 0x30: [mem 0xfffff800-0xffffffff pref]
  127. pci 0000:26:00.0: reg 0x164: [mem 0x00000000-0x00007fff]
  128. pci 0000:26:00.0: VF(n) BAR0 space: [mem 0x00000000-0x0001ffff] (contains BAR0 for 4 VFs)
  129. pci 0000:26:00.0: reg 0x16c: [mem 0x00000000-0x00003fff]
  130. pci 0000:26:00.0: VF(n) BAR2 space: [mem 0x00000000-0x0000ffff] (contains BAR2 for 4 VFs)
  131. pci 0000:26:00.1: [10ee:0000] type 00 class 0x058000
  132. pci 0000:26:00.1: reg 0x10: [mem 0xf7a20000-0xf7a3ffff]
  133. pci 0000:26:00.1: reg 0x18: [mem 0xf7a00000-0xf7a1ffff]
  134. pci 0000:26:00.1: reg 0x164: [mem 0x00000000-0x00007fff]
  135. pci 0000:26:00.1: VF(n) BAR0 space: [mem 0x00000000-0x0001ffff] (contains BAR0 for 4 VFs)
  136. pci 0000:26:00.1: reg 0x16c: [mem 0x00000000-0x00003fff]
  137. pci 0000:26:00.1: VF(n) BAR2 space: [mem 0x00000000-0x0000ffff] (contains BAR2 for 4 VFs)
  138. pci 0000:00:03.1: PCI bridge to [bus 26]
  139. pci 0000:00:03.1:   bridge window [mem 0xf7a00000-0xf7afffff]
  140. pci 0000:27:00.0: [1022:148a] type 00 class 0x130000
  141. pci 0000:27:00.0: enabling Extended Tags
  142. pci 0000:00:07.1: PCI bridge to [bus 27]
  143. pci 0000:28:00.0: [1022:1485] type 00 class 0x130000
  144. pci 0000:28:00.0: enabling Extended Tags
  145. pci 0000:28:00.1: [1022:1486] type 00 class 0x108000
  146. pci 0000:28:00.1: reg 0x18: [mem 0xf7600000-0xf76fffff]
  147. pci 0000:28:00.1: reg 0x24: [mem 0xf7708000-0xf7709fff]
  148. pci 0000:28:00.1: enabling Extended Tags
  149. pci 0000:28:00.3: [1022:149c] type 00 class 0x0c0330
  150. pci 0000:28:00.3: reg 0x10: [mem 0xf7500000-0xf75fffff 64bit]
  151. pci 0000:28:00.3: enabling Extended Tags
  152. pci 0000:28:00.3: PME# supported from D0 D3hot D3cold
  153. pci 0000:28:00.4: [1022:1487] type 00 class 0x040300
  154. pci 0000:28:00.4: reg 0x10: [mem 0xf7700000-0xf7707fff]
  155. pci 0000:28:00.4: enabling Extended Tags
  156. pci 0000:28:00.4: PME# supported from D0 D3hot D3cold
  157. pci 0000:00:08.1: PCI bridge to [bus 28]
  158. pci 0000:00:08.1:   bridge window [mem 0xf7500000-0xf77fffff]
  159. pci 0000:30:00.0: [1022:7901] type 00 class 0x010601
  160. pci 0000:30:00.0: reg 0x24: [mem 0xf7900000-0xf79007ff]
  161. pci 0000:30:00.0: enabling Extended Tags
  162. pci 0000:30:00.0: PME# supported from D3hot D3cold
  163. pci 0000:00:08.2: PCI bridge to [bus 30]
  164. pci 0000:00:08.2:   bridge window [mem 0xf7900000-0xf79fffff]
  165. pci 0000:31:00.0: [1022:7901] type 00 class 0x010601
  166. pci 0000:31:00.0: reg 0x24: [mem 0xf7800000-0xf78007ff]
  167. pci 0000:31:00.0: enabling Extended Tags
  168. pci 0000:31:00.0: PME# supported from D3hot D3cold
  169. pci 0000:00:08.3: PCI bridge to [bus 31]
  170. pci 0000:00:08.3:   bridge window [mem 0xf7800000-0xf78fffff]
  173. ### 热插拔相关，linux-git\drivers\pnp\pnpacpi\core.c  中打印
  174. pnp: PnP ACPI init
  175. system 00:00: [mem 0xf8000000-0xfbffffff] has been reserved
  176. system 00:00: Plug and Play ACPI device, IDs PNP0c01 (active)
  177. system 00:01: [mem 0xfd000000-0xfd0fffff] has been reserved
  178. system 00:01: Plug and Play ACPI device, IDs PNP0c02 (active)
  179. pnp 00:02: Plug and Play ACPI device, IDs PNP0b00 (active)
  181. ###    在 system_pnp_driver的probe中获取资源，
  182. system 00:03: [io  0x0a00-0x0a0f] has been reserved
  183. system 00:03: [io  0x0a10-0x0a1f] has been reserved
  184. system 00:03: [io  0x0a20-0x0a2f] has been reserved
  185. system 00:03: [io  0x0a30-0x0a3f] has been reserved
  186. system 00:03: Plug and Play ACPI device, IDs PNP0c02 (active)
  187. pnp 00:04: [dma 0 disabled]
  188. pnp 00:04: Plug and Play ACPI device, IDs PNP0400 (active)
  189. pnp 00:05: [dma 0 disabled]
  190. pnp 00:05: Plug and Play ACPI device, IDs PNP0501 (active)
  191. system 00:06: [io  0x04d0-0x04d1] has been reserved
  192. system 00:06: [io  0x040b] has been reserved
  193. system 00:06: [io  0x04d6] has been reserved
  194. system 00:06: [io  0x0c00-0x0c01] has been reserved
  195. system 00:06: [io  0x0c14] has been reserved
  196. system 00:06: [io  0x0c50-0x0c51] has been reserved
  197. system 00:06: [io  0x0c52] has been reserved
  198. system 00:06: [io  0x0c6c] has been reserved
  199. system 00:06: [io  0x0c6f] has been reserved
  200. system 00:06: [io  0x0cd0-0x0cd1] has been reserved
  201. system 00:06: [io  0x0cd2-0x0cd3] has been reserved
  202. system 00:06: [io  0x0cd4-0x0cd5] has been reserved
  203. system 00:06: [io  0x0cd6-0x0cd7] has been reserved
  204. system 00:06: [io  0x0cd8-0x0cdf] has been reserved
  205. system 00:06: [io  0x0800-0x089f] has been reserved
  206. system 00:06: [io  0x0b00-0x0b0f] has been reserved
  207. system 00:06: [io  0x0b20-0x0b3f] has been reserved
  208. system 00:06: [io  0x0900-0x090f] has been reserved
  209. system 00:06: [io  0x0910-0x091f] has been reserved
  210. system 00:06: [mem 0xfec00000-0xfec00fff] could not be reserved
  211. system 00:06: [mem 0xfec01000-0xfec01fff] could not be reserved
  212. system 00:06: [mem 0xfedc0000-0xfedc0fff] has been reserved
  213. system 00:06: [mem 0xfee00000-0xfee00fff] has been reserved
  214. system 00:06: [mem 0xfed80000-0xfed8ffff] could not be reserved
  215. system 00:06: [mem 0xfec10000-0xfec10fff] has been reserved
  216. system 00:06: [mem 0xff000000-0xffffffff] has been reserved
  217. system 00:06: Plug and Play ACPI device, IDs PNP0c02 (active)
  218. pnp: PnP ACPI: found 7 devices
  221. ###  ？？？
  222. ### 这部分没跟踪到，主要是 pci_claim_resource 和 pci_assign_resource， 没看到谁调用
  223. ### 其实在 pcibios_assign_resources->pcibios_allocate_rom_resources 中会操作option ROM相关
  224. ### fs_initcall(pcibios_assign_resources);
  225. clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns
  226. pci 0000:26:00.0: can't claim BAR 6 [mem 0xfffff800-0xffffffff pref]: no compatible bridge window
  227. pci_bus 0000:00: max bus depth: 3 pci_try_num: 4
  228. pci 0000:00:01.1: PCI bridge to [bus 01]
  229. pci 0000:00:01.1:   bridge window [mem 0xf7b00000-0xf7bfffff]
  230. pci 0000:20:00.0: PCI bridge to [bus 21]
  231. pci 0000:20:01.0: PCI bridge to [bus 22]
  232. pci 0000:20:01.0:   bridge window [io  0xf000-0xffff]
  233. pci 0000:20:01.0:   bridge window [mem 0xf7200000-0xf72fffff]
  234. pci 0000:20:04.0: PCI bridge to [bus 25]
  235. pci 0000:20:04.0:   bridge window [io  0xe000-0xefff]
  236. pci 0000:20:04.0:   bridge window [mem 0xf6000000-0xf70fffff]
  237. pci 0000:20:04.0:   bridge window [mem 0xe0000000-0xf1ffffff 64bit pref]
  238. pci 0000:03:00.2: PCI bridge to [bus 20-25]
  239. pci 0000:03:00.2:   bridge window [io  0xe000-0xffff]
  240. pci 0000:03:00.2:   bridge window [mem 0xf6000000-0xf72fffff]
  241. pci 0000:03:00.2:   bridge window [mem 0xe0000000-0xf1ffffff 64bit pref]
  242. pci 0000:00:01.3: PCI bridge to [bus 03-25]
  243. pci 0000:00:01.3:   bridge window [io  0xe000-0xffff]
  244. pci 0000:00:01.3:   bridge window [mem 0xf6000000-0xf73fffff]
  245. pci 0000:00:01.3:   bridge window [mem 0xe0000000-0xf1ffffff 64bit pref]
  246. pci 0000:26:00.0: BAR 7: assigned [mem 0xf7a80000-0xf7a9ffff]
  247. pci 0000:26:00.1: BAR 7: assigned [mem 0xf7aa0000-0xf7abffff]
  248. pci 0000:26:00.0: BAR 9: assigned [mem 0xf7ac0000-0xf7acffff]
  249. pci 0000:26:00.1: BAR 9: assigned [mem 0xf7ad0000-0xf7adffff]
  250. pci 0000:26:00.0: BAR 6: assigned [mem 0xf7ae0000-0xf7ae07ff pref]
  251. pci 0000:00:03.1: PCI bridge to [bus 26]
  252. pci 0000:00:03.1:   bridge window [mem 0xf7a00000-0xf7afffff]
  253. pci 0000:00:07.1: PCI bridge to [bus 27]
  254. pci 0000:00:08.1: PCI bridge to [bus 28]
  255. pci 0000:00:08.1:   bridge window [mem 0xf7500000-0xf77fffff]
  256. pci 0000:00:08.2: PCI bridge to [bus 30]
  257. pci 0000:00:08.2:   bridge window [mem 0xf7900000-0xf79fffff]
  258. pci 0000:00:08.3: PCI bridge to [bus 31]
  259. pci 0000:00:08.3:   bridge window [mem 0xf7800000-0xf78fffff]
  260. pci_bus 0000:00: resource 4 [io  0x0000-0x03af window]
  261. pci_bus 0000:00: resource 5 [io  0x03e0-0x0cf7 window]
  262. pci_bus 0000:00: resource 6 [io  0x03b0-0x03df window]
  263. pci_bus 0000:00: resource 7 [io  0x0d00-0xffff window]
  264. pci_bus 0000:00: resource 8 [mem 0x000a0000-0x000bffff window]
  265. pci_bus 0000:00: resource 9 [mem 0x000c0000-0x000dffff window]
  266. pci_bus 0000:00: resource 10 [mem 0xe0000000-0xfec2ffff window]
  267. pci_bus 0000:00: resource 11 [mem 0xfee00000-0xffffffff window]
  268. pci_bus 0000:01: resource 1 [mem 0xf7b00000-0xf7bfffff]
  269. pci_bus 0000:03: resource 0 [io  0xe000-0xffff]
  270. pci_bus 0000:03: resource 1 [mem 0xf6000000-0xf73fffff]
  271. pci_bus 0000:03: resource 2 [mem 0xe0000000-0xf1ffffff 64bit pref]
  272. pci_bus 0000:20: resource 0 [io  0xe000-0xffff]
  273. pci_bus 0000:20: resource 1 [mem 0xf6000000-0xf72fffff]
  274. pci_bus 0000:20: resource 2 [mem 0xe0000000-0xf1ffffff 64bit pref]
  275. pci_bus 0000:22: resource 0 [io  0xf000-0xffff]
  276. pci_bus 0000:22: resource 1 [mem 0xf7200000-0xf72fffff]
  277. pci_bus 0000:25: resource 0 [io  0xe000-0xefff]
  278. pci_bus 0000:25: resource 1 [mem 0xf6000000-0xf70fffff]
  279. pci_bus 0000:25: resource 2 [mem 0xe0000000-0xf1ffffff 64bit pref]
  280. pci_bus 0000:26: resource 1 [mem 0xf7a00000-0xf7afffff]
  281. pci_bus 0000:28: resource 1 [mem 0xf7500000-0xf77fffff]
  282. pci_bus 0000:30: resource 1 [mem 0xf7900000-0xf79fffff]
  283. pci_bus 0000:31: resource 1 [mem 0xf7800000-0xf78fffff]
  284. NET: Registered protocol family 2
  287. ### 如果开启IOMMU，则给分配iommu  group
  288. pci 0000:00:00.2: AMD-Vi: IOMMU performance counters supported
  289. pci 0000:00:01.0: Adding to iommu group 0
  290. pci 0000:00:01.1: Adding to iommu group 1
  291. pci 0000:00:01.3: Adding to iommu group 2
  292. pci 0000:00:02.0: Adding to iommu group 3
  293. pci 0000:00:03.0: Adding to iommu group 4
  294. pci 0000:00:03.1: Adding to iommu group 5
  295. pci 0000:00:04.0: Adding to iommu group 6
  296. pci 0000:00:05.0: Adding to iommu group 7
  297. pci 0000:00:07.0: Adding to iommu group 8
  298. pci 0000:00:07.1: Adding to iommu group 9
  299. pci 0000:00:08.0: Adding to iommu group 10
  300. pci 0000:00:08.1: Adding to iommu group 11
  301. pci 0000:00:08.2: Adding to iommu group 12
  302. pci 0000:00:08.3: Adding to iommu group 13
  303. pci 0000:00:14.0: Adding to iommu group 14
  304. pci 0000:00:14.3: Adding to iommu group 14
  305. pci 0000:00:18.0: Adding to iommu group 15
  306. pci 0000:00:18.1: Adding to iommu group 15
  307. pci 0000:00:18.2: Adding to iommu group 15
  308. pci 0000:00:18.3: Adding to iommu group 15
  309. pci 0000:00:18.4: Adding to iommu group 15
  310. pci 0000:00:18.5: Adding to iommu group 15
  311. pci 0000:00:18.6: Adding to iommu group 15
  312. pci 0000:00:18.7: Adding to iommu group 15
  313. pci 0000:01:00.0: Adding to iommu group 16
  314. pci 0000:03:00.0: Adding to iommu group 17
  315. pci 0000:03:00.1: Adding to iommu group 17
  316. pci 0000:03:00.2: Adding to iommu group 17
  317. pci 0000:20:00.0: Adding to iommu group 17
  318. pci 0000:20:01.0: Adding to iommu group 17
  319. pci 0000:20:04.0: Adding to iommu group 17
  320. pci 0000:22:00.0: Adding to iommu group 17
  321. pci 0000:25:00.0: Adding to iommu group 17
  322. pci 0000:25:00.1: Adding to iommu group 17
  323. pci 0000:26:00.0: Adding to iommu group 18
  324. pci 0000:26:00.1: Adding to iommu group 18
  325. pci 0000:27:00.0: Adding to iommu group 19
  326. pci 0000:28:00.0: Adding to iommu group 20
  327. pci 0000:28:00.1: Adding to iommu group 21
  328. pci 0000:28:00.3: Adding to iommu group 22
  329. pci 0000:28:00.4: Adding to iommu group 23
  330. pci 0000:30:00.0: Adding to iommu group 24
  331. pci 0000:31:00.0: Adding to iommu group 25
  332. pci 0000:00:00.2: AMD-Vi: Found IOMMU cap 0x40
  333. pci 0000:00:00.2: AMD-Vi: Extended features (0x58f77ef22294ade):