[PATCH] kexec: print out debugging message if required for kexec_load

[Qiang Ma]

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 <maqia...@uniontech.com>
---
 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