drivers/pci/Kconfig

   1 #
   2 # PCI configuration
   3 #
   4 config PCI_MSI
   5         bool "Message Signaled Interrupts (MSI and MSI-X)"
   6         depends on PCI
   7         depends on (X86_LOCAL_APIC && X86_IO_APIC) || IA64
   8         help
   9            This allows device drivers to enable MSI (Message Signaled
  10            Interrupts).  Message Signaled Interrupts enable a device to
  11            generate an interrupt using an inbound Memory Write on its
  12            PCI bus instead of asserting a device IRQ pin.
  13
  14            Use of PCI MSI interrupts can be disabled at kernel boot time
  15            by using the 'pci=nomsi' option.  This disables MSI for the
  16            entire system.
  17
  18            If you don't know what to do here, say N.
  19
  20 config PCI_MULTITHREAD_PROBE
  21         bool "PCI Multi-threaded probe (EXPERIMENTAL)"
  22         depends on PCI && EXPERIMENTAL
  23         help
  24           Say Y here if you want the PCI core to spawn a new thread for
  25           every PCI device that is probed.  This can cause a huge
  26           speedup in boot times on multiprocessor machines, and even a
  27           smaller speedup on single processor machines.
  28
  29           But it can also cause lots of bad things to happen.  A number
  30           of PCI drivers cannot properly handle running in this way,
  31           some will just not work properly at all, while others might
  32           decide to blow up power supplies with a huge load all at once,
  33           so use this option at your own risk.
  34
  35           It is very unwise to use this option if you are not using a
  36           boot process that can handle devices being created in any
  37           order.  A program that can create persistent block and network
  38           device names (like udev) is a good idea if you wish to use
  39           this option.
  40
  41           Again, use this option at your own risk, you have been warned!
  42
  43           When in doubt, say N.
  44
  45 config PCI_DEBUG
  46         bool "PCI Debugging"
  47         depends on PCI && DEBUG_KERNEL
  48         help
  49           Say Y here if you want the PCI core to produce a bunch of debug
  50           messages to the system log.  Select this if you are having a
  51           problem with PCI support and want to see more of what is going on.
  52
  53           When in doubt, say N.
  54
  55 config HT_IRQ
  56         bool "Interrupts on hypertransport devices"
  57         default y
  58         depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
  59         help
  60            This allows native hypertransport devices to use interrupts.
  61
  62            If unsure say Y.