superrob1500
/
mirror-linux
mirror of https://github.com/torvalds/linux
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

x86/boot/Documentation: Prefix hexadecimal literals with 0x 

The x86 bootloader ID specification text uses hexadecimal
values without a 0x prefix:

        D  kexec-tools
        E  Extended (see ext_loader_type)
        F  Special (0xFF = undefined)
        10 Reserved
        11 Minimal Linux Bootloader
           <http://sebastian-plotz.blogspot.de>
        12 OVMF UEFI virtualization stack
        13 barebox

Which beyond the ambiguity of '13' in isolation, also
made me fail a grep -wi '0xd' when I was looking for
the kexec bootloader ID definition and caused quite
a bit of head-scratching before I found out why it
didn't show up.

Furthermore, the actual explanatory text uses the 0x
prefix:

  For boot loader IDs above T = 0xD, write T = 0xE to this field and
  write the extended ID minus 0x10 to the ext_loader_type field.
  Similarly, the ext_loader_ver field can be used to provide more than
  four bits for the bootloader version.

So make it all both unambiguous, easy to grep and consistent
across the entire documentation by prefixing the IDs with 0x.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel@vger.kernel.org
pull/1354/merge
Ingo Molnar 2025-12-03 18:29:59 +01:00
parent c7957da777
commit 1c3377bee2
1 changed files with 23 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
Documentation/arch/x86/boot.rst
View File

@ -431,31 +431,31 @@ Protocol: 2.00+
ext_loader_type <- 0x05
ext_loader_ver <- 0x23
Assigned boot loader IDs (hexadecimal):
Assigned boot loader IDs:
== =======================================
0 LILO
(0x00 reserved for pre-2.00 bootloader)
1 Loadlin
2 bootsect-loader
(0x20, all other values reserved)
3 Syslinux
4 Etherboot/gPXE/iPXE
5 ELILO
7 GRUB
8 U-Boot
9 Xen
A Gujin
B Qemu
C Arcturus Networks uCbootloader
D kexec-tools
E Extended (see ext_loader_type)
F Special (0xFF = undefined)
10 Reserved
11 Minimal Linux Bootloader
<http://sebastian-plotz.blogspot.de>
12 OVMF UEFI virtualization stack
13 barebox
0x0 LILO
(0x00 reserved for pre-2.00 bootloader)
0x1 Loadlin
0x2 bootsect-loader
(0x20, all other values reserved)
0x3 Syslinux
0x4 Etherboot/gPXE/iPXE
0x5 ELILO
0x7 GRUB
0x8 U-Boot
0x9 Xen
0xA Gujin
0xB Qemu
0xC Arcturus Networks uCbootloader
0xD kexec-tools
0xE Extended (see ext_loader_type)
0xF Special (0xFF = undefined)
0x10 Reserved
0x11 Minimal Linux Bootloader
<http://sebastian-plotz.blogspot.de>
0x12 OVMF UEFI virtualization stack
0x13 barebox
== =======================================
Please contact <hpa@zytor.com> if you need a bootloader ID value assigned.