On Thu, 22 Oct 2020 at 01:48, Andrew Jeffery <andrew@xxxxxxxx> wrote:
>
> Reserve a 1.5MiB region of memory to record kmsg dumps, console and
> userspace message state into 16kiB ring-buffer slots. The sizing allows
> for up to 16 dumps to be captured and read out.
>
> Set max-reason to KMSG_DUMP_EMERG to capture bad-path reboots.
>
> Signed-off-by: Andrew Jeffery <andrew@xxxxxxxx>
Reviewed-by: Joel Stanley <joel@xxxxxxxxx>
> ---
> arch/arm/boot/dts/aspeed-bmc-opp-tacoma.dts | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/arch/arm/boot/dts/aspeed-bmc-opp-tacoma.dts b/arch/arm/boot/dts/aspeed-bmc-opp-tacoma.dts
> index 09b561429579..04efabe70d9f 100644
> --- a/arch/arm/boot/dts/aspeed-bmc-opp-tacoma.dts
> +++ b/arch/arm/boot/dts/aspeed-bmc-opp-tacoma.dts
> @@ -34,6 +34,15 @@ flash_memory: region@b8000000 {
>
> /* 48MB region from the end of flash to start of vga memory */
>
> + ramoops@bc000000 {
> + compatible = "ramoops";
> + reg = <0xbc000000 0x180000>; /* 16 * (3 * 0x8000) */
> + record-size = <0x8000>;
> + console-size = <0x8000>;
> + pmsg-size = <0x8000>;
> + max-reason = <3>; /* KMSG_DUMP_EMERG */
> + };
> +
> /* VGA region is dictated by hardware strapping */
> vga_memory: region@bf000000 {
> no-map;
> --
> 2.25.1
>
