/ sys / class / [ HOME SHELL ] 
Name Size Permission Action
  ata_device [ DIR ] drwxr-xr-x  
  ata_link [ DIR ] drwxr-xr-x  
  ata_port [ DIR ] drwxr-xr-x  
  backlight [ DIR ] drwxr-xr-x  
  bdi [ DIR ] drwxr-xr-x  
  block [ DIR ] drwxr-xr-x  
  bsg [ DIR ] drwxr-xr-x  
  devcoredump [ DIR ] drwxr-xr-x  
  devfreq [ DIR ] drwxr-xr-x  
  dma [ DIR ] drwxr-xr-x  
  dmi [ DIR ] drwxr-xr-x  
  fc_host [ DIR ] drwxr-xr-x  
  fc_remote_ports [ DIR ] drwxr-xr-x  
  fc_transport [ DIR ] drwxr-xr-x  
  fc_vports [ DIR ] drwxr-xr-x  
  firmware [ DIR ] drwxr-xr-x  
  gpio [ DIR ] drwxr-xr-x  
  graphics [ DIR ] drwxr-xr-x  
  hidraw [ DIR ] drwxr-xr-x  
  hwmon [ DIR ] drwxr-xr-x  
  i2c-adapter [ DIR ] drwxr-xr-x  
  input [ DIR ] drwxr-xr-x  
  iommu [ DIR ] drwxr-xr-x  
  leds [ DIR ] drwxr-xr-x  
  mem [ DIR ] drwxr-xr-x  
  misc [ DIR ] drwxr-xr-x  
  net [ DIR ] drwxr-xr-x  
  pci_bus [ DIR ] drwxr-xr-x  
  phy [ DIR ] drwxr-xr-x  
  power_supply [ DIR ] drwxr-xr-x  
  powercap [ DIR ] drwxr-xr-x  
  pps [ DIR ] drwxr-xr-x  
  ptp [ DIR ] drwxr-xr-x  
  pwm [ DIR ] drwxr-xr-x  
  regulator [ DIR ] drwxr-xr-x  
  rtc [ DIR ] drwxr-xr-x  
  scsi_device [ DIR ] drwxr-xr-x  
  scsi_disk [ DIR ] drwxr-xr-x  
  scsi_generic [ DIR ] drwxr-xr-x  
  scsi_host [ DIR ] drwxr-xr-x  
  spi_master [ DIR ] drwxr-xr-x  
  spidev [ DIR ] drwxr-xr-x  
  thermal [ DIR ] drwxr-xr-x  
  tty [ DIR ] drwxr-xr-x  
  vc [ DIR ] drwxr-xr-x  
  vtconsole [ DIR ] drwxr-xr-x  
  watchdog [ DIR ] drwxr-xr-x  

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Change Permission : iommu