MIPS: kexec: add debug info about the new kexec'ed image

Print details of the new kexec image loaded.

Based on the original code from
commit 221f2c770e10d ("arm64/kexec: Add pr_debug output")

Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14614/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/arch/mips/kernel/machine_kexec.c b/arch/mips/kernel/machine_kexec.c
index 59725204105c..8b574bcd39ba 100644
--- a/arch/mips/kernel/machine_kexec.c
+++ b/arch/mips/kernel/machine_kexec.c
@@ -28,9 +28,31 @@ atomic_t kexec_ready_to_reboot = ATOMIC_INIT(0);
 void (*_crash_smp_send_stop)(void) = NULL;
 #endif
 
+static void kexec_image_info(const struct kimage *kimage)
+{
+        unsigned long i;
+
+        pr_debug("kexec kimage info:\n");
+        pr_debug("  type:        %d\n", kimage->type);
+        pr_debug("  start:       %lx\n", kimage->start);
+        pr_debug("  head:        %lx\n", kimage->head);
+        pr_debug("  nr_segments: %lu\n", kimage->nr_segments);
+
+        for (i = 0; i < kimage->nr_segments; i++) {
+                pr_debug("    segment[%lu]: %016lx - %016lx, 0x%lx bytes, %lu pages\n",
+                        i,
+                        kimage->segment[i].mem,
+                        kimage->segment[i].mem + kimage->segment[i].memsz,
+                        (unsigned long)kimage->segment[i].memsz,
+                        (unsigned long)kimage->segment[i].memsz /  PAGE_SIZE);
+        }
+}
+
 int
 machine_kexec_prepare(struct kimage *kimage)
 {
+        kexec_image_info(kimage);
+
         if (_machine_kexec_prepare)
                 return _machine_kexec_prepare(kimage);
         return 0;