On 10/30/25 at 03:33pm, Qiang Ma wrote:
> The commit a85ee18c7900 ("kexec_file: print out debugging message
> if required") has added general code printing in kexec_file_load(),
> but not in kexec_load().
>
> Especially in the RISC-V architecture, kexec_image_info() has been
> removed(commit eb7622d908a0 ("kexec_file, riscv: print out debugging
> message if required")). As a result, when using '-d' for the kexec_load
> interface, print nothing in the kernel space. This might be helpful for
> verifying the accuracy of the data passed to the kernel. Therefore, refer to
> this commit a85ee18c7900 ("kexec_file: print out debugging message
> if required"), debug print information has been added.
kexec_file_dbg_print setting when CONFIG_KEXEC_FILE is set. I doubt it
doesn't work when you unset CONFIG_KEXEC_FILE.
>
> Signed-off-by: Qiang Ma <[email protected]>
> ---
> kernel/kexec.c | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/kernel/kexec.c b/kernel/kexec.c
> index 28008e3d462e..02845a7499e9 100644
> --- a/kernel/kexec.c
> +++ b/kernel/kexec.c
> @@ -151,7 +151,15 @@ static int do_kexec_load(unsigned long entry, unsigned
> long nr_segments,
> if (ret)
> goto out;
>
> + kexec_dprintk("nr_segments = %lu\n", image->nr_segments);
> for (i = 0; i < nr_segments; i++) {
> + struct kexec_segment *ksegment;
> +
> + ksegment = &image->segment[i];
> + kexec_dprintk("segment[%d]: buf=0x%p bufsz=0x%zx mem=0x%lx
> memsz=0x%zx\n",
> + i, ksegment->buf, ksegment->bufsz, ksegment->mem,
> + ksegment->memsz);
> +
> ret = kimage_load_segment(image, i);
> if (ret)
> goto out;
> @@ -163,6 +171,9 @@ static int do_kexec_load(unsigned long entry, unsigned
> long nr_segments,
> if (ret)
> goto out;
>
> + kexec_dprintk("kexec_file_load: type:%u, start:0x%lx head:0x%lx
> flags:0x%lx\n",
> + image->type, image->start, image->head, flags);
> +
> /* Install the new kernel and uninstall the old */
> image = xchg(dest_image, image);
>
> --
> 2.20.1
>
>
