| /Linux-v5.15/Documentation/admin-guide/ |
| D | initrd.rst | 1 Using the initial RAM disk (initrd)
8 initrd provides the capability to load a RAM disk by the boot loader.
11 from a different device. The previous root (from initrd) is then moved
14 initrd is mainly designed to allow system startup to occur in two phases,
16 where additional modules are loaded from initrd.
18 This document gives a brief overview of the use of initrd. A more detailed
25 When using initrd, the system typically boots as follows:
28 2) the kernel converts initrd into a "normal" RAM disk and
29 frees the memory used by initrd
33 4) root device is mounted. if it is ``/dev/ram0``, the initrd image is
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| D | efi-stub.rst | 50 The "initrd=" option
54 multiple initrd files using the "initrd=" option. This is the only EFI
58 The path to the initrd file must be an absolute path from the
66 initrd-large.img
69 initrd-small.img
70 initrd-medium.img
72 to boot with the initrd-large.img file if the current working
75 fs0:\Kernels> bzImage.efi initrd=\Kernels\initrd-large.img
99 "dtb=" is processed in the same manner as the "initrd=" option that is
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| D | bootconfig.rst | 161 Since the boot configuration file is loaded with initrd, it will be added
162 to the end of the initrd (initramfs) image file with padding, size,
165 [initrd][bootconfig][padding][size(le32)][checksum(le32)][#BOOTCONFIG\n]
169 When the boot configuration is added to the initrd image, the total
174 The Linux kernel decodes the last part of the initrd image in memory to
178 loader passes the correct initrd file size. If by any chance, the boot
183 to/from initrd image. You can build it by the following command::
187 To add your boot config file to initrd image, run bootconfig as below
190 # tools/bootconfig/bootconfig -a your-config /boot/initrd.img-X.Y.Z
194 # tools/bootconfig/bootconfig -d /boot/initrd.img-X.Y.Z
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| /Linux-v5.15/tools/testing/selftests/rcutorture/doc/ |
| D | initrd.txt | 1 The rcutorture scripting tools automatically create an initrd containing
7 userspace environments, you might wish to press an existing initrd
12 zcat /initrd.img > /tmp/initrd.img.zcat
13 mkdir initrd
14 cd initrd
15 cpio -id < /tmp/initrd.img.zcat
16 # Manually verify that initrd contains needed binaries and libraries.
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| D | rcu-test-image.txt | 1 Normally, a minimal initrd is created automatically by the rcutorture
5 $ size tools/testing/selftests/rcutorture/initrd/init
7 328 0 8 336 150 tools/testing/selftests/rcutorture/initrd/init
15 tools/testing/selftests/rcutorture/initrd
17 For example, your tools/testing/selftests/rcutorture/initrd/init might
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| /Linux-v5.15/arch/um/kernel/ |
| D | initrd.c | 14 static char *initrd __initdata = NULL;
23 if (initrd == NULL) in read_initrd()
26 err = os_file_size(initrd, &size); in read_initrd()
35 printk(KERN_ERR "\"%s\" is a zero-size initrd\n", initrd); in read_initrd()
43 if (load_initrd(initrd, area, size) == -1) in read_initrd()
53 initrd = line; in uml_initrd_setup()
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| /Linux-v5.15/arch/arm/boot/bootp/ |
| D | init.S | 24 bl move @ move the initrd
30 ldmia r13, {r5-r9} @ get size and addr of initrd
33 @ r7 = initrd start
34 @ r8 = initrd end
56 mov r5, #4 @ Size of initrd tag (4 words)
76 data: .word initrd_start @ source initrd address
77 .word initrd_phys @ destination initrd address
78 .word initrd_size @ initrd size
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| /Linux-v5.15/arch/powerpc/boot/ |
| D | README | 2 To extract the kernel vmlinux, System.map, .config or initrd from the zImage binary:
7 objcopy -j .kernel:initrd -O binary zImage.initrd initrd.gz
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| D | wrapper | 39 initrd=
106 initrd="$1"
230 isection=.kernel:initrd
277 isection=initrd
316 isection=.kernel:initrd
456 if [ -n "$initrd" ]; then
457 real_rd="$initrd"
464 if [ -z "$initrd" ]; then
485 if [ -n "$initrd" ]; then
486 addsec $tmp "$initrd" $isection
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| D | zImage.ps3.lds.S | 18 .kernel:initrd : { *(.kernel:initrd) }
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| D | main.c | 229 struct addr_range vmlinux, initrd; in start() local
255 initrd = prep_initrd(vmlinux, chosen, in start()
279 kentry((unsigned long)initrd.addr, initrd.size, in start()
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| D | zImage.lds.S | 75 .kernel:initrd :
78 *(.kernel:initrd)
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| /Linux-v5.15/Documentation/power/ |
| D | swsusp-dmcrypt.rst | 13 You did read Documentation/admin-guide/initrd.rst and know how an initrd works.
14 You know how to create or how to modify an initrd.
19 an initrd that does your current crypto setup already.
25 or an usb stick prior to resume. So you need an initrd, that sets
31 always the same major/minor within the initrd as well as
43 Prepare your boot loader to use the initrd you will create or
48 initrd=/boot/initrd.gz
52 Finally you need to create or modify your initrd. Lets assume
53 you create an initrd that reads the required dm-crypt setup
57 named "swapkey". /etc/fstab of your initrd contains something
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| /Linux-v5.15/Documentation/x86/ |
| D | microcode.rst | 24 The microcode is stored in an initrd file. During boot, it is read from
27 The format of the combined initrd image is microcode in (uncompressed)
28 cpio format followed by the (possibly compressed) initrd image. The
29 loader parses the combined initrd image during boot.
39 scans the microcode file in the initrd. If microcode matching the
47 Here's a crude example how to prepare an initrd with microcode (this is
49 initrd, so you don't really have to do it yourself. It is documented
56 echo "You need to supply an initrd file"
63 TMPDIR=/tmp/initrd
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| /Linux-v5.15/Documentation/devicetree/bindings/ |
| D | chosen.txt | 124 linux,initrd-start and linux,initrd-end
127 These properties hold the physical start and end address of an initrd that's
128 loaded by the bootloader. Note that linux,initrd-start is inclusive, but
129 linux,initrd-end is exclusive.
134 linux,initrd-start = <0x82000000>;
135 linux,initrd-end = <0x82800000>;
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| /Linux-v5.15/arch/arm/boot/ |
| D | Makefile | 93 $(obj)/bootp/bootp: $(obj)/zImage initrd FORCE
99 PHONY += initrd
100 initrd: target
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| /Linux-v5.15/arch/parisc/kernel/ |
| D | kexec_file.c | 17 unsigned long kernel_len, char *initrd, in elf_load() argument
44 if (initrd != NULL) { in elf_load()
45 kbuf.buffer = initrd; in elf_load()
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| /Linux-v5.15/arch/powerpc/kexec/ |
| D | elf_64.c | 28 unsigned long kernel_len, char *initrd, in elf64_load() argument
91 if (initrd != NULL) { in elf64_load()
92 kbuf.buffer = initrd; in elf64_load()
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| /Linux-v5.15/Documentation/arm/ |
| D | uefi.rst | 68 linux,initrd-start 64-bit Physical start address of an initrd
70 linux,initrd-end 64-bit Physical end address of an initrd
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| /Linux-v5.15/tools/testing/selftests/rcutorture/bin/ |
| D | mkinitrd.sh | 27 mkdir -p initrd
28 cd initrd
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| /Linux-v5.15/arch/arm64/kernel/ |
| D | machine_kexec_file.c | 84 char *initrd, unsigned long initrd_len, in load_other_segments() argument
127 if (initrd) { in load_other_segments()
128 kbuf.buffer = initrd; in load_other_segments()
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| D | kexec_image.c | 39 char *initrd, unsigned long initrd_len, in image_load() argument
102 kernel_segment->memsz, initrd, in image_load()
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| /Linux-v5.15/arch/arm/boot/dts/ |
| D | kirkwood-iconnect.dts | 19 linux,initrd-start = <0x4500040>;
20 linux,initrd-end = <0x4800000>;
164 label = "initrd";
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| /Linux-v5.15/Documentation/admin-guide/acpi/ |
| D | ssdt-overlays.rst | 70 Loading ACPI SSDTs from initrd
73 This option allows loading of user defined SSDTs from initrd and it is useful
76 It works in a similar way with initrd based ACPI tables override/upgrade: SSDT
77 AML code must be placed in the first, uncompressed, initrd under the
93 # Create the uncompressed cpio archive and concatenate the original initrd
96 cat /boot/initrd >>/boot/instrumented_initrd
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| /Linux-v5.15/Documentation/powerpc/ |
| D | mpc52xx.rst | 27 # make zImage.initrd
31 DBug> dn -i zImage.initrd.lite5200
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