[PATCH v3 08/13] u-boot: Setup UEFI and Secure Boot

[Javier Tia <javier.tia@linaro.org>]

Add U-Boot minimal UEFI definitions.

Embedded UEFI variables with the keys previously generated. It's to
enable UEFI Secure Boot and verify the authenticity of the firmware and
operating system.

When U-Boot is built with UEFI support, it includes a set of efivars
that are used to store the Secure Boot variables. These efivars are
embedded in the U-Boot binary and are stored in the flash memory of the
system.

Signed-off-by: Javier Tia <javier.tia@linaro.org>
---
 .../u-boot/u-boot-qemuarm64-secureboot.inc     | 18 ++++++++++++++++++
 .../u-boot/u-boot/uefi-secureboot.cfg          | 10 ++++++++++
 .../recipes-bsp/u-boot/u-boot_%.bbappend       |  2 +-
 3 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 meta-arm-bsp/recipes-bsp/u-boot/u-boot-qemuarm64-secureboot.inc
 create mode 100644 meta-arm-bsp/recipes-bsp/u-boot/u-boot/uefi-secureboot.cfg

diff --git a/meta-arm-bsp/recipes-bsp/u-boot/u-boot-qemuarm64-secureboot.inc b/meta-arm-bsp/recipes-bsp/u-boot/u-boot-qemuarm64-secureboot.inc
new file mode 100644
index 00000000..ffad08e4
--- /dev/null
+++ b/meta-arm-bsp/recipes-bsp/u-boot/u-boot-qemuarm64-secureboot.inc
@@ -0,0 +1,18 @@
+FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
+
+SRC_URI += "file://uefi-secureboot.cfg"
+
+UBOOT_BOARDDIR = "${S}/board/emulation/qemu-arm"
+UBOOT_ENV_NAME = "qemu-arm.env"
+
+DEPENDS += 'python3-pyopenssl-native'
+
+do_compile:prepend() {
+    export CRYPTOGRAPHY_OPENSSL_NO_LEGACY=1
+
+    "${S}"/tools/efivar.py set -i "${S}"/ubootefi.var -n pk  -d "${UEFI_SB_KEYS_DIR}"/PK.esl  -t file
+    "${S}"/tools/efivar.py set -i "${S}"/ubootefi.var -n kek -d "${UEFI_SB_KEYS_DIR}"/KEK.esl -t file
+    "${S}"/tools/efivar.py set -i "${S}"/ubootefi.var -n db  -d "${UEFI_SB_KEYS_DIR}"/db.esl  -t file
+    "${S}"/tools/efivar.py set -i "${S}"/ubootefi.var -n dbx -d "${UEFI_SB_KEYS_DIR}"/dbx.esl -t file
+    "${S}"/tools/efivar.py print -i "${S}"/ubootefi.var
+}
diff --git a/meta-arm-bsp/recipes-bsp/u-boot/u-boot/uefi-secureboot.cfg b/meta-arm-bsp/recipes-bsp/u-boot/u-boot/uefi-secureboot.cfg
new file mode 100644
index 00000000..d2edb5fb
--- /dev/null
+++ b/meta-arm-bsp/recipes-bsp/u-boot/u-boot/uefi-secureboot.cfg
@@ -0,0 +1,10 @@
+CONFIG_CMD_BOOTMENU=y
+CONFIG_USE_BOOTCOMMAND=y
+CONFIG_BOOTCOMMAND="bootmenu"
+CONFIG_USE_PREBOOT=y
+CONFIG_EFI_VAR_BUF_SIZE=65536
+CONFIG_FIT_SIGNATURE=y
+CONFIG_EFI_SECURE_BOOT=y
+CONFIG_EFI_VARIABLES_PRESEED=y
+CONFIG_PREBOOT="setenv bootmenu_0 UEFI Boot Manager=bootefi bootmgr; setenv bootmenu_1 UEFI Maintenance Menu=eficonfig"
+CONFIG_PREBOOT_DEFINED=y
\ No newline at end of file
diff --git a/meta-arm-bsp/recipes-bsp/u-boot/u-boot_%.bbappend b/meta-arm-bsp/recipes-bsp/u-boot/u-boot_%.bbappend
index 11f332ad..ee815b6a 100644
--- a/meta-arm-bsp/recipes-bsp/u-boot/u-boot_%.bbappend
+++ b/meta-arm-bsp/recipes-bsp/u-boot/u-boot_%.bbappend
@@ -5,6 +5,6 @@ MACHINE_U-BOOT_REQUIRE:corstone1000 = "u-boot-corstone1000.inc"
 MACHINE_U-BOOT_REQUIRE:fvp-base = "u-boot-fvp-base.inc"
 MACHINE_U-BOOT_REQUIRE:juno = "u-boot-juno.inc"
 MACHINE_U-BOOT_REQUIRE:tc = "u-boot-tc.inc"
+MACHINE_U-BOOT_REQUIRE += "${@bb.utils.contains('MACHINE_FEATURES', 'uefi-secureboot', 'u-boot-qemuarm64-secureboot.inc', '', d)}"
 
 require ${MACHINE_U-BOOT_REQUIRE}
-
-- 
2.46.0