[PATCH v3 2/3] ARM: dts: Add nvmem node for BCM2711 bootloader public key
Krzysztof Kozlowski
krzysztof.kozlowski at linaro.org
Fri Apr 21 00:55:33 PDT 2023
On 20/04/2023 14:29, Ivan T. Ivanov wrote:
> From: Tim Gover <tim.gover at raspberrypi.com>
>
> Make a copy of the bootloader secure-boot public key available to the OS
> via an nvmem node. The placement information is populated by the
> Raspberry Pi firmware[1] if a public key is present in the BCM2711
> bootloader EEPROM.
>
> [1] https://www.raspberrypi.com/documentation/computers/configuration.html#nvmem-nodes
>
> Signed-off-by: Tim Gover <tim.gover at raspberrypi.com>
> [iivanov] Added link to documentation.
> Signed-off-by: Ivan T. Ivanov <iivanov at suse.de>
> ---
> arch/arm/boot/dts/bcm2711-rpi.dtsi | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/arch/arm/boot/dts/bcm2711-rpi.dtsi b/arch/arm/boot/dts/bcm2711-rpi.dtsi
> index 98817a6675b9..e30fbe84f9c3 100644
> --- a/arch/arm/boot/dts/bcm2711-rpi.dtsi
> +++ b/arch/arm/boot/dts/bcm2711-rpi.dtsi
> @@ -15,6 +15,7 @@ aliases {
> ethernet0 = &genet;
> pcie0 = &pcie0;
> blconfig = &blconfig;
> + blpubkey = &blpubkey;
> };
> };
>
> @@ -67,6 +68,19 @@ blconfig: nvram at 0 {
> no-map;
> status = "disabled";
> };
> +
> + /*
> + * RPi4 will copy the binary public key blob (if present) from the bootloader
> + * into memory for use by the OS.
> + */
> + blpubkey: nvram at 1 {
> + compatible = "raspberrypi,bootloader-public-key", "nvmem-rmem";
> + #address-cells = <1>;
> + #size-cells = <1>;
> + reg = <0x0 0x0 0x0>;
> + no-map;
> + status = "disabled";
Why this is disabled? What external resources are missing?
Best regards,
Krzysztof
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