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powerpc/kexec_file: print configured kernel command line

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Kexec with the -d option prints extra logs about the kexec/kdump kernel
that help debug kexec and kdump. For example, it shows what kexec
segments are loaded, their locations, and sizes.

One key piece of information still missing is the kernel command line
configured for the kexec/kdump kernel.

With this patch included, the kernel will print the kernel command line
configured for the kexec/kdump kernel as shown below:

kexec --initrd=./initrd ./kernel -lspd --command-line="test1 test2"

Loaded elf core header at 0x22e30000, bufsz=0x2000 memsz=0x80000
kexec_elf: Command line: elfcorehdr=0x22e30000 test1 test2   <--- New
kexec_elf: Loaded initrd at 0x22eb0000

Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
Tested-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>
Reviewed-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250725124438.327593-1-sourabhjain@linux.ibm.com
This commit is contained in:
Sourabh Jain 2025-07-25 18:14:38 +05:30 committed by Madhavan Srinivasan
parent 1144454ea2
commit e58b9d9097
1 changed files with 2 additions and 0 deletions
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2
arch/powerpc/kexec/elf_64.c
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@ -94,6 +94,8 @@ static void *elf64_load(struct kimage *image, char *kernel_buf,
cmdline = modified_cmdline;
}
kexec_dprintk("Command line: %s", cmdline ? cmdline : "");
if (initrd != NULL) {
kbuf.buffer = initrd;
kbuf.bufsz = kbuf.memsz = initrd_len;