2# For a description of the syntax of this configuration file,
   3# see Documentation/kbuild/kconfig-language.txt.
   6menu "Firmware Drivers"
   8config EDD
   9        tristate "BIOS Enhanced Disk Drive calls determine boot disk"
  10        depends on X86
  11        help
  12          Say Y or M here if you want to enable BIOS Enhanced Disk Drive
  13          Services real mode BIOS calls to determine which disk
  14          BIOS tries boot from.  This information is then exported via sysfs.
  16          This option is experimental and is known to fail to boot on some
  17          obscure configurations. Most disk controller BIOS vendors do
  18          not yet implement this feature.
  20config EDD_OFF
  21        bool "Sets default behavior for EDD detection to off"
  22        depends on EDD
  23        default n
  24        help
  25          Say Y if you want EDD disabled by default, even though it is compiled into the
  26          kernel. Say N if you want EDD enabled by default. EDD can be dynamically set
  27          using the kernel parameter 'edd={on|skipmbr|off}'.
  30    bool "Add firmware-provided memory map to sysfs" if EXPERT
  31    default X86
  32    help
  33      Add the firmware-provided (unmodified) memory map to /sys/firmware/memmap.
  34      That memory map is used for example by kexec to set up parameter area
  35      for the next kernel, but can also be used for debugging purposes.
  37      See also Documentation/ABI/testing/sysfs-firmware-memmap.
  39config EFI_VARS
  40        tristate "EFI Variable Support via sysfs"
  41        depends on EFI
  42        default n
  43        help
  44          If you say Y here, you are able to get EFI (Extensible Firmware
  45          Interface) variable information via sysfs.  You may read,
  46          write, create, and destroy EFI variables through this interface.
  48          Note that using this driver in concert with efibootmgr requires
  49          at least test release version 0.5.0-test3 or later, which is
  50          available from Matt Domsch's website located at:
  51          <>
  53          Subsequent efibootmgr releases may be found at:
  54          <>
  56config EFI_PCDP
  57        bool "Console device selection via EFI PCDP or HCDP table"
  58        depends on ACPI && EFI && IA64
  59        default y if IA64
  60        help
  61          If your firmware supplies the PCDP table, and you want to
  62          automatically use the primary console device it describes
  63          as the Linux console, say Y here.
  65          If your firmware supplies the HCDP table, and you want to
  66          use the first serial port it describes as the Linux console,
  67          say Y here.  If your EFI ConOut path contains only a UART
  68          device, it will become the console automatically.  Otherwise,
  69          you must specify the "console=hcdp" kernel boot argument.
  71          Neither the PCDP nor the HCDP affects naming of serial devices,
  72          so a serial console may be /dev/ttyS0, /dev/ttyS1, etc, depending
  73          on how the driver discovers devices.
  75          You must also enable the appropriate drivers (serial, VGA, etc.)
  77          See DIG64_HCDPv20_042804.pdf available from
  78          <> 
  80config DELL_RBU
  81        tristate "BIOS update support for DELL systems via sysfs"
  82        depends on X86
  83        select FW_LOADER
  84        help
  85         Say m if you want to have the option of updating the BIOS for your
  86         DELL system. Note you need a Dell OpenManage or Dell Update package (DUP)
  87         supporting application to communicate with the BIOS regarding the new
  88         image for the image update to take effect.
  89         See <file:Documentation/dell_rbu.txt> for more details on the driver.
  91config DCDBAS
  92        tristate "Dell Systems Management Base Driver"
  93        depends on X86
  94        help
  95          The Dell Systems Management Base Driver provides a sysfs interface
  96          for systems management software to perform System Management
  97          Interrupts (SMIs) and Host Control Actions (system power cycle or
  98          power off after OS shutdown) on certain Dell systems.
 100          See <file:Documentation/dcdbas.txt> for more details on the driver
 101          and the Dell systems on which Dell systems management software makes
 102          use of this driver.
 104          Say Y or M here to enable the driver for use by Dell systems
 105          management software such as Dell OpenManage.
 107config DMIID
 108    bool "Export DMI identification via sysfs to userspace"
 109    depends on DMI
 110    default y
 111        help
 112          Say Y here if you want to query SMBIOS/DMI system identification
 113          information from userspace through /sys/class/dmi/id/ or if you want
 114          DMI-based module auto-loading.
 116config DMI_SYSFS
 117        tristate "DMI table support in sysfs"
 118        depends on SYSFS && DMI
 119        default n
 120        help
 121          Say Y or M here to enable the exporting of the raw DMI table
 122          data via sysfs.  This is useful for consuming the data without
 123          requiring any access to /dev/mem at all.  Tables are found
 124          under /sys/firmware/dmi when this option is enabled and
 125          loaded.
 127config ISCSI_IBFT_FIND
 128        bool "iSCSI Boot Firmware Table Attributes"
 129        depends on X86
 130        default n
 131        help
 132          This option enables the kernel to find the region of memory
 133          in which the ISCSI Boot Firmware Table (iBFT) resides. This
 134          is necessary for iSCSI Boot Firmware Table Attributes module to work
 135          properly.
 137config ISCSI_IBFT
 138        tristate "iSCSI Boot Firmware Table Attributes module"
 139        select ISCSI_BOOT_SYSFS
 140        depends on ISCSI_IBFT_FIND && SCSI && SCSI_LOWLEVEL
 141        default n
 142        help
 143          This option enables support for detection and exposing of iSCSI
 144          Boot Firmware Table (iBFT) via sysfs to userspace. If you wish to
 145          detect iSCSI boot parameters dynamically during system boot, say Y.
 146          Otherwise, say N.
 148source "drivers/firmware/google/Kconfig"
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