On 20/04/2023 14:29, Ivan T. Ivanov wrote: > From: Tim Gover <tim.gover@xxxxxxxxxxxxxxx> > > 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@xxxxxxxxxxxxxxx> > [iivanov] Added link to documentation. > Signed-off-by: Ivan T. Ivanov <iivanov@xxxxxxx> > --- > 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@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@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
