[PATCH v4 2/2] kexec-arm64: Add functionality to dump 2nd dtb

Simon Horman horms at verge.net.au
Wed Jun 27 05:04:38 PDT 2018


On Thu, Jun 21, 2018 at 03:54:38PM +0530, Bhupesh Sharma wrote:
> 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.

This seems significantly more verbose than what -d already outputs.
Perhaps a second debug level is warranted here?

> 
> Signed-off-by: Bhupesh Sharma <bhsharma at redhat.com>
> ---
>  kexec/arch/arm64/kexec-arm64.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/kexec/arch/arm64/kexec-arm64.c b/kexec/arch/arm64/kexec-arm64.c
> index a206c172b1aa..47df756bd595 100644
> --- a/kexec/arch/arm64/kexec-arm64.c
> +++ b/kexec/arch/arm64/kexec-arm64.c
> @@ -540,6 +540,8 @@ static int setup_2nd_dtb(struct dtb *dtb, char *command_line, int on_crash)
>  	dtb->buf = new_buf;
>  	dtb->size = fdt_totalsize(new_buf);
>  
> +	dbgprintf("%s: found %s\n", __func__, dtb->path);
> +	dump_fdt(dtb->buf);
>  	dump_reservemap(dtb);
>  
>  	return result;
> -- 
> 2.7.4
> 



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