| What: /sys/kernel/boot_params |
| Contact: Dave Young <dyoung@redhat.com> |
| Description: The /sys/kernel/boot_params directory contains two |
| files: "data" and "version" and one subdirectory "setup_data". |
| It is used to export the kernel boot parameters of an x86 |
| platform to userspace for kexec and debugging purpose. |
| If there's no setup_data in boot_params the subdirectory will |
| "data" file is the binary representation of struct boot_params. |
| "version" file is the string representation of boot |
| "setup_data" subdirectory contains the setup_data data |
| structure in boot_params. setup_data is maintained in kernel |
| as a link list. In "setup_data" subdirectory there's one |
| subdirectory for each link list node named with the number |
| of the list nodes. The list node subdirectory contains two |
| files "type" and "data". "type" file is the string |
| representation of setup_data type. "data" file is the binary |
| representation of setup_data payload. |
| The whole boot_params directory structure is like below: |