On 11/03/25 at 02:34pm, 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.
>
> Signed-off-by: Qiang Ma <[email protected]>
> Reported-by: kernel test robot <[email protected]>
> Closes:
> https://lore.kernel.org/oe-kbuild-all/[email protected]/
> ---
> kernel/kexec.c | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/kernel/kexec.c b/kernel/kexec.c
> index c7a869d32f87..9b433b972cc1 100644
> --- a/kernel/kexec.c
> +++ b/kernel/kexec.c
> @@ -154,7 +154,15 @@ static int do_kexec_load(unsigned long entry, unsigned
> long nr_segments,
> if (ret)
> goto out;
>
> + kexec_dprintk("nr_segments = %lu\n", nr_segments);
> for (i = 0; i < nr_segments; i++) {
> + struct kexec_segment *ksegment;
> +
> + ksegment = &image->segment[i];
> + kexec_dprintk("segment[%lu]: buf=0x%p bufsz=0x%zx mem=0x%lx
> memsz=0x%zx\n",
> + i, ksegment->buf, ksegment->bufsz, ksegment->mem,
> + ksegment->memsz);
There has already been a print_segments() in kexec-tools/kexec/kexec.c,
you will get duplicated printing. That sounds not good. Have you tested
this?
> +
> ret = kimage_load_segment(image, i);
> if (ret)
> goto out;
> @@ -166,6 +174,9 @@ static int do_kexec_load(unsigned long entry, unsigned
> long nr_segments,
> if (ret)
> goto out;
>
> + kexec_dprintk("kexec_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
>
