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Message-ID: <176478421534.498.1718811169860557062.tip-bot2@tip-bot2>
Date: Wed, 03 Dec 2025 17:50:15 -0000
From: "tip-bot2 for Ingo Molnar" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Ingo Molnar <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
linux-kernel@...r.kernel.org, x86@...nel.org
Subject:
[tip: x86/urgent] x86/boot/Documentation: Prefix hexadecimal literals with 0x
The following commit has been merged into the x86/urgent branch of tip:
Commit-ID: 1c3377bee2127f98f16705376a36326c98113d1c
Gitweb: https://git.kernel.org/tip/1c3377bee2127f98f16705376a36326c98113d1c
Author: Ingo Molnar <mingo@...nel.org>
AuthorDate: Wed, 03 Dec 2025 18:29:59 +01:00
Committer: Ingo Molnar <mingo@...nel.org>
CommitterDate: Wed, 03 Dec 2025 18:49:09 +01:00
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@...nel.org>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: linux-kernel@...r.kernel.org
---
Documentation/arch/x86/boot.rst | 46 ++++++++++++++++----------------
1 file changed, 23 insertions(+), 23 deletions(-)
diff --git a/Documentation/arch/x86/boot.rst b/Documentation/arch/x86/boot.rst
index b0f648b..42f50fa 100644
--- a/Documentation/arch/x86/boot.rst
+++ b/Documentation/arch/x86/boot.rst
@@ -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@...or.com> if you need a bootloader ID value assigned.
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