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/Linux-v5.4/Documentation/driver-api/
Ddell_rbu.rst2 Usage of the new open sourced rbu (Remote BIOS Update) driver
8 Document demonstrating the use of the Dell Remote BIOS Update driver.
9 for updating BIOS images on Dell servers and desktops.
15 It does not cover the support needed from applications to enable the BIOS to
22 the BIOS on Dell servers (starting from servers sold since 1999), desktops
28 Libsmbios can also be used to update BIOS on Dell systems go to
31 Dell_RBU driver supports BIOS update using the monolithic image and packetized
33 of physical pages having the BIOS image. In case of packetized the app
41 inform the BIOS to enable the update in the next system reboot.
43 The user should not unload the rbu driver after downloading the BIOS image
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/Linux-v5.4/Documentation/firmware-guide/acpi/
Dosi.rst7 An ACPI BIOS can use the "Operating System Interfaces" method (_OSI)
8 to find out what the operating system supports. Eg. If BIOS
11 and answer YES or NO to the BIOS.
16 This document explains how and why the BIOS and Linux should use these methods.
28 So even though the BIOS may use _OSI to query what version of Windows is running,
29 only a single path through the BIOS has actually been tested.
30 Experience shows that taking untested paths through the BIOS
31 exposes Linux to an entire category of BIOS bugs.
42 using the same BIOS image? Often they need to do something different
44 Here the BIOS should ask exactly what it wants to know:
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/Linux-v5.4/Documentation/x86/
Dusb-legacy-support.rst11 Also known as "USB Keyboard" or "USB Mouse support" in the BIOS Setup is a
24 system crashes, because the SMM BIOS is not expecting to be in PAE mode.
28 because the SMM BIOS isn't expecting the CPU to be in 64-bit mode. The
29 BIOS manufacturers only test with Windows, and Windows doesn't do 64-bit
42 in the kernel config or USB Legacy support in the BIOS. A BIOS update
46 is usually fixed by a BIOS update. Check the board
48 Legacy support in the BIOS. If this alone doesn't help, try also adding
49 idle=poll on the kernel command line. The BIOS may be entering the SMM
Damd-memory-encryption.rst70 Linux relies on BIOS to set this bit if BIOS has determined that the reduction
89 SME can also be enabled and activated in the BIOS. If SME is enabled and
90 activated in the BIOS, then all memory accesses will be encrypted and it will
91 not be necessary to activate the Linux memory encryption support. If the BIOS
94 by supplying mem_encrypt=on on the kernel command line. However, if BIOS does
Dpat.rst220 D E MTRR -> PAT disable Disabled BIOS
222 - np/E PAT -> PAT disable Disabled BIOS
224 E !P/E MTRR -> PAT init Disabled BIOS
225 D !P/E MTRR -> PAT disable Disabled BIOS
226 !M !P/E MTRR stub -> PAT disable Disabled BIOS
240 BIOS PAT keeps PAT MSR with BIOS setting
/Linux-v5.4/Documentation/driver-api/mtd/
Dintel-spi.rst2 Upgrading BIOS using intel-spi
6 controller which is used to hold BIOS and other platform specific data.
12 allows upgrading the BIOS image directly from an OS.
21 Please keep in mind that overwriting the BIOS image on SPI serial flash
25 Below are the steps how to upgrade MinnowBoard MAX BIOS directly from
28 1) Download and extract the latest Minnowboard MAX BIOS SPI image
40 (it is named as "BIOS")::
44 mtd0: 00800000 00001000 "BIOS"
69 8) Once completed without errors you can write the new BIOS image:
74 BIOS image::
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/Linux-v5.4/Documentation/fb/
Duvesafb.rst8 uvesafb should work with any video card that has a Video BIOS compliant
12 v86d. v86d is used to run the x86 Video BIOS code in a simulated and
33 cards, but which is ultimately limited by the Video BIOS interface.
39 with uvesafb, simply because the Video BIOS doesn't support the
42 ratio, which is what most BIOS-es are limited to.
44 Video BIOS. Note that many nVidia Video BIOS-es claim to be VBE 3.0
101 vtotal:n If the video BIOS of your card incorrectly determines the total
102 amount of video RAM, use this option to override the BIOS (in MiB).
119 has any effect only if the Video BIOS is VBE 3.0 compliant. Use it
122 be ignored and the refresh rate will stay at your BIOS default
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Dvesafb.rst8 of the BIOS, and use this as framebuffer device /dev/fb0, like the m68k
13 impossible; BIOS calls work in real mode only. VESA BIOS Extensions
74 If this does not work, this might be because your BIOS does not support
76 Even if your board does, it might be the BIOS which does not. VESA BIOS
114 The VESA BIOS provides protected mode interface for changing
117 seems not to work with some BIOS versions, but there are options
183 vtotal:n If the video BIOS of your card incorrectly determines the total
184 amount of video RAM, use this option to override the BIOS (in MiB).
/Linux-v5.4/drivers/gpu/drm/amd/display/dc/bios/
DMakefile26 BIOS = bios_parser.o bios_parser_interface.o bios_parser_helper.o command_table.o command_table_he… macro
28 BIOS += command_table2.o command_table_helper2.o bios_parser2.o
30 AMD_DAL_BIOS = $(addprefix $(AMDDALPATH)/dc/bios/,$(BIOS))
/Linux-v5.4/Documentation/firmware-guide/acpi/apei/
Deinj.rst10 You need to check whether your BIOS supports EINJ first. For that, look
15 which shows that the BIOS is exposing an EINJ table - it is the
22 don't exist: before you give up, go into BIOS setup to see if the BIOS
26 the BIOS menu.
118 this actually works depends on what operations the BIOS actually
121 BIOS versions based on the ACPI 4.0 specification have limited options
122 in controlling where the errors are injected. Your BIOS may support an
128 BIOS versions based on the ACPI 5.0 specification have more control over
152 An ACPI 5.0 BIOS may also allow vendor-specific errors to be injected.
154 from the BIOS that hopefully will allow an application wishing to use
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/Linux-v5.4/drivers/pnp/pnpbios/
DKconfig3 # Plug and Play BIOS configuration
6 bool "Plug and Play BIOS support"
10 Linux uses the PNPBIOS as defined in "Plug and Play BIOS
19 BIOS) say Y here. Also the PNPBIOS can help prevent resource
27 bool "Plug and Play BIOS /proc interface"
/Linux-v5.4/Documentation/hwmon/
Dnct7802.rst27 Tested Boards and BIOS Versions
31 BIOS versions.
34 Board BIOS version
Dk10temp.rst41 BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h Processors:
45 BIOS and Kernel Developer's Guide (BKDG) for AMD Family 11h Processors:
49 BIOS and Kernel Developer's Guide (BKDG) for AMD Family 12h Processors:
53 BIOS and Kernel Developer's Guide (BKDG) for AMD Family 14h Models 00h-0Fh Processors:
117 If the BIOS has enabled hardware temperature control, the threshold at
Dsch5627.rst25 initialization most be done by the BIOS, so if the watchdog is not enabled
26 by the BIOS the sch5627 driver will not register a watchdog device.
/Linux-v5.4/drivers/mtd/maps/
DKconfig166 mtd0 and mtd2 are the two BIOS drives, which use the resident
169 mtd1 allows you to reprogram your BIOS. BE VERY CAREFUL.
203 tristate "BIOS flash chip on AMD76x southbridge"
206 Support for treating the BIOS flash chip on AMD76x motherboards
207 as an MTD device - with this you can reprogram your BIOS.
212 tristate "BIOS flash chip on Intel Controller Hub 2/3/4/5"
215 Support for treating the BIOS flash chip on ICHX motherboards
216 as an MTD device - with this you can reprogram your BIOS.
221 tristate "BIOS flash chip on Intel ESB Controller Hub 2"
224 Support for treating the BIOS flash chip on ESB2 motherboards
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/Linux-v5.4/Documentation/scsi/
Daha152x.txt35 Don't test for BIOS signature (AHA-1510 or disabled BIOS)
55 When you do this, the BIOS test is skipped. Entered values have to be
107 The BIOS uses a cylinder/head/sector addressing scheme (C/H/S)
108 scheme instead. DOS expects a BIOS or driver that understands this
115 Therefore the SCSI BIOS/DOS driver has to calculate a logical/virtual
117 returned by the SCSI BIOS is a pure calculation and has nothing to
130 The AHA-1522 BIOS calculates the geometry by fixing the number of heads
138 extended translation. This means that the BIOS uses 255 for heads,
145 not be configurable in certain BIOS setups.
/Linux-v5.4/Documentation/cpu-freq/
Damd-powernow.txt16 The drivers use BIOS supplied tables to obtain frequency and
18 Frequency transitions will be unavailable if the BIOS does
27 is available in the "BIOS and Kernel Developer's Guide", publication
30 BIOS supplied data, for powernow-k7 and for powernow-k8, may be
/Linux-v5.4/sound/soc/intel/
DKconfig129 in the BIOS then enable this option by saying Y or m.
138 enabled in the BIOS then enable this option by saying Y or m.
147 enabled in the BIOS then enable this option by saying Y or m.
156 enabled in the BIOS then enable this option by saying Y or m.
165 enabled in the BIOS then enable this option by saying Y or m.
174 enabled in the BIOS then enable this option by saying Y or m.
183 enabled in the BIOS then enable this option by saying Y or m.
192 enabled in the BIOS then enable this option by saying Y or m.
221 GeminiLake or CannonLake platform with the DSP enabled in the BIOS
/Linux-v5.4/Documentation/admin-guide/
Dsvga.rst13 allows the use of various special video modes supported by the video BIOS. Due
14 to usage of the BIOS, the selection is limited to boot time (before the
69 with VESA-compliant BIOS]) or a chipset name (e.g., Trident). Direct detection
86 on the VGA BIOS).
95 program will try to ask the BIOS for all possible video mode numbers and test
98 all consistent video modes supported by your BIOS will appear (plus maybe some
120 0x0100 to 0x017f - standard BIOS modes. The ID is a BIOS video mode number
123 0x0200 to 0x08ff - VESA BIOS modes. The ID is a VESA mode ID increased by
128 945=132x28 for the standard Video7 BIOS)
167 Allows to set _any_ BIOS mode including graphic ones and forcing specific
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/Linux-v5.4/Documentation/sound/hd-audio/
Dmodels.rst422 auto-config reading BIOS (default)
488 auto-config reading BIOS (default)
569 BIOS setup (default)
584 BIOS setup (default)
629 BIOS setup (default)
650 BIOS setup (default)
667 Fixes with Dell BIOS setup
669 Fixes with Dell BIOS setup including analog mic
673 BIOS setup (default)
694 BIOS setup (default)
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/Linux-v5.4/Documentation/admin-guide/acpi/
Dinitrd_table_override.rst12 via upgrading the ACPI tables provided by the BIOS with an instrumented,
35 Complain to your platform/BIOS vendor if you find a bug which is so severe
37 allows you to upgrade the buggy tables before your platform/BIOS vendor
38 releases an upgraded BIOS binary.
40 This facility can be used by platform/BIOS vendors to provide a Linux
44 ACPI BIOS table compatibility with the Linux kernel by modifying old
/Linux-v5.4/Documentation/ABI/testing/
Dsysfs-driver-ppi7 Presence Interface). Only if TPM is supported by BIOS, this
50 take place in order to transition to the BIOS for execution of
60 operation to be executed in the pre-OS environment by the BIOS
71 operation to be executed in the pre-OS environment by the BIOS
/Linux-v5.4/Documentation/power/
Dvideo.rst10 initialized by BIOS, and kernel does not have enough information to
14 This is not problem for swsusp, because during swsusp resume, BIOS is
19 We either have to run video BIOS during early resume, or interpret it
44 (2) systems where it is possible to call the video BIOS during S3
45 resume. Unfortunately, it is not correct to call the video BIOS at
50 the BIOS works well enough to be able to set video mode. Use
95 Acer Aspire 1406LC ole's late BIOS init (7), turn off DRI
148 BIOS 1.04 2002-08-23, but not at all with
149 BIOS 1.11 2004-11-05 :-(]
/Linux-v5.4/drivers/mtd/spi-nor/
DKconfig84 and is used to hold BIOS and other persistent settings. Using
85 this driver it is possible to upgrade BIOS directly from Linux.
100 Intel hardware and is used to hold BIOS and other persistent
101 settings. Using this driver it is possible to upgrade BIOS
/Linux-v5.4/drivers/pci/pcie/
DKconfig95 bool "BIOS default"
98 Use the BIOS defaults for PCI Express ASPM.
105 BIOS did not.
119 Disable PCI Express ASPM L0s and L1, even if the BIOS enabled them.

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