[RESEND PATCH 2/2] kexec-arm64: Add functionality to dump 2nd dtb

Bhupesh Sharma bhsharma at redhat.com
Mon Mar 19 03:35:39 PDT 2018

Since during the arm64 kexec_load()/kdump invocation,
the dtb is passed to the second kernel, it is sometimes useful
to dump the dtb contents (to verify the correctness
of the same).

This patch adds this feature which is enabled when '-d' flag is
used with kexec command line invocation.

Signed-off-by: Bhupesh Sharma <bhsharma at redhat.com>
 kexec/arch/arm64/kexec-arm64.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kexec/arch/arm64/kexec-arm64.c b/kexec/arch/arm64/kexec-arm64.c
index 62f37585b788..1b54718465b9 100644
--- a/kexec/arch/arm64/kexec-arm64.c
+++ b/kexec/arch/arm64/kexec-arm64.c
@@ -477,9 +477,10 @@ static int setup_2nd_dtb(struct dtb *dtb, char *command_line, int on_crash)
 		dtb->size = fdt_totalsize(new_buf);
+	dbgprintf("%s: found %s\n", __func__, dtb->path);
+	dump_fdt(dtb->buf);
 	return result;

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