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_VARS_PSTORE
  57        bool "Register efivars backend for pstore"
  58        depends on EFI_VARS && PSTORE
  59        default y
  60        help
  61          Say Y here to enable use efivars as a backend to pstore. This
  62          will allow writing console messages, crash dumps, or anything
  63          else supported by pstore to EFI variables.
  66        bool "Disable using efivars as a pstore backend by default"
  67        depends on EFI_VARS_PSTORE
  68        default n
  69        help
  70          Saying Y here will disable the use of efivars as a storage
  71          backend for pstore by default. This setting can be overridden
  72          using the efivars module's pstore_disable parameter.
  74config EFI_PCDP
  75        bool "Console device selection via EFI PCDP or HCDP table"
  76        depends on ACPI && EFI && IA64
  77        default y if IA64
  78        help
  79          If your firmware supplies the PCDP table, and you want to
  80          automatically use the primary console device it describes
  81          as the Linux console, say Y here.
  83          If your firmware supplies the HCDP table, and you want to
  84          use the first serial port it describes as the Linux console,
  85          say Y here.  If your EFI ConOut path contains only a UART
  86          device, it will become the console automatically.  Otherwise,
  87          you must specify the "console=hcdp" kernel boot argument.
  89          Neither the PCDP nor the HCDP affects naming of serial devices,
  90          so a serial console may be /dev/ttyS0, /dev/ttyS1, etc, depending
  91          on how the driver discovers devices.
  93          You must also enable the appropriate drivers (serial, VGA, etc.)
  95          See DIG64_HCDPv20_042804.pdf available from
  96          <> 
  98config DELL_RBU
  99        tristate "BIOS update support for DELL systems via sysfs"
 100        depends on X86
 101        select FW_LOADER
 102        help
 103         Say m if you want to have the option of updating the BIOS for your
 104         DELL system. Note you need a Dell OpenManage or Dell Update package (DUP)
 105         supporting application to communicate with the BIOS regarding the new
 106         image for the image update to take effect.
 107         See <file:Documentation/dell_rbu.txt> for more details on the driver.
 109config DCDBAS
 110        tristate "Dell Systems Management Base Driver"
 111        depends on X86
 112        help
 113          The Dell Systems Management Base Driver provides a sysfs interface
 114          for systems management software to perform System Management
 115          Interrupts (SMIs) and Host Control Actions (system power cycle or
 116          power off after OS shutdown) on certain Dell systems.
 118          See <file:Documentation/dcdbas.txt> for more details on the driver
 119          and the Dell systems on which Dell systems management software makes
 120          use of this driver.
 122          Say Y or M here to enable the driver for use by Dell systems
 123          management software such as Dell OpenManage.
 125config DMIID
 126    bool "Export DMI identification via sysfs to userspace"
 127    depends on DMI
 128    default y
 129        help
 130          Say Y here if you want to query SMBIOS/DMI system identification
 131          information from userspace through /sys/class/dmi/id/ or if you want
 132          DMI-based module auto-loading.
 134config DMI_SYSFS
 135        tristate "DMI table support in sysfs"
 136        depends on SYSFS && DMI
 137        default n
 138        help
 139          Say Y or M here to enable the exporting of the raw DMI table
 140          data via sysfs.  This is useful for consuming the data without
 141          requiring any access to /dev/mem at all.  Tables are found
 142          under /sys/firmware/dmi when this option is enabled and
 143          loaded.
 145config ISCSI_IBFT_FIND
 146        bool "iSCSI Boot Firmware Table Attributes"
 147        depends on X86
 148        default n
 149        help
 150          This option enables the kernel to find the region of memory
 151          in which the ISCSI Boot Firmware Table (iBFT) resides. This
 152          is necessary for iSCSI Boot Firmware Table Attributes module to work
 153          properly.
 155config ISCSI_IBFT
 156        tristate "iSCSI Boot Firmware Table Attributes module"
 157        select ISCSI_BOOT_SYSFS
 158        depends on ISCSI_IBFT_FIND && SCSI && SCSI_LOWLEVEL
 159        default n
 160        help
 161          This option enables support for detection and exposing of iSCSI
 162          Boot Firmware Table (iBFT) via sysfs to userspace. If you wish to
 163          detect iSCSI boot parameters dynamically during system boot, say Y.
 164          Otherwise, say N.
 166source "drivers/firmware/google/Kconfig"
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