diff options
| author | Daniel Gibson <daniel@gibson.sh> | 2026-06-24 14:43:25 +0200 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2026-08-05 15:35:25 -0700 |
| commit | 33a581d800670e5d91e99203536d15ef7451ad69 (patch) | |
| tree | a902e175c1b70ecd188c0730a3d735234f4911fd | |
| parent | e4632f592cc2d7f948fc62b441ddc75ef74372b3 (diff) | |
Documentation/arch/x86/amd-debugging: Add example for reset register
The amd debugging documentation didn't state how to identify kernel log lines
with information from the reset register about the cause of a previous random
reboot.
Add an example.
Suggested-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Daniel Gibson <daniel@gibson.sh>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Link: https://patch.msgid.link/20260624124326.746525-2-daniel@gibson.sh
| -rw-r--r-- | Documentation/arch/x86/amd-debugging.rst | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/arch/x86/amd-debugging.rst b/Documentation/arch/x86/amd-debugging.rst index d92bf59d62c7..3176a1240fee 100644 --- a/Documentation/arch/x86/amd-debugging.rst +++ b/Documentation/arch/x86/amd-debugging.rst @@ -366,3 +366,8 @@ There are 6 classes of reasons for the reboot: This information is read by the kernel at bootup and printed into the syslog. When a random reboot occurs this message can be helpful to determine the next component to debug. + +For example, if bit 19 was set, you will get a message like this in the log on +next bootup:: + + x86/amd: Previous system reset reason [0x00080000]: software wrote 0x6 to reset control register 0xCF9 |