[v8,1/2] arm: Enable Secure Boot in all required recipes

diff --git a/meta-arm/classes/sbsign.bbclass b/meta-arm/classes/sbsign.bbclass
new file mode 100644
index 00000000..551b951d
--- /dev/null
+++ b/meta-arm/classes/sbsign.bbclass
@@ -0,0 +1,31 @@ 
+# Sign binaries for UEFI Secure Boot
+#
+# Usage in recipes:
+#
+# Set binary to sign per recipe:
+# SBSIGN_TARGET_BINARY = "${B}/binary_to_sign"
+#
+# Then call do_sbsign() in correct stage of the build
+# do_compile:append() {
+#     do_sbsign
+# }
+
+DEPENDS += 'gen-sbkeys'
+DEPENDS += "sbsigntool-native"
+
+SBSIGN_KEY = "${SBSIGN_KEYS_DIR}/db.key"
+SBSIGN_CERT = "${SBSIGN_KEYS_DIR}/db.crt"
+SBSIGN_TARGET_BINARY ?= "binary_to_sign"
+
+# Not adding as task since recipes may need to sign binaries at different
+# stages. Instead they can call this function when needed by calling this function
+do_sbsign() {
+    bbnote "Signing ${PN} binary ${SBSIGN_TARGET_BINARY} with ${SBSIGN_KEY} and ${SBSIGN_CERT}"
+    ${STAGING_BINDIR_NATIVE}/sbsign \
+        --key "${SBSIGN_KEY}" \
+        --cert "${SBSIGN_CERT}" \
+        --output  "${SBSIGN_TARGET_BINARY}.signed" \
+        "${SBSIGN_TARGET_BINARY}"
+    cp "${SBSIGN_TARGET_BINARY}" "${SBSIGN_TARGET_BINARY}.unsigned"
+    cp "${SBSIGN_TARGET_BINARY}.signed" "${SBSIGN_TARGET_BINARY}"
+}
diff --git a/meta-arm/recipes-bsp/u-boot/u-boot-uefi-secureboot.inc b/meta-arm/recipes-bsp/u-boot/u-boot-uefi-secureboot.inc
new file mode 100644
index 00000000..e58035a9
--- /dev/null
+++ b/meta-arm/recipes-bsp/u-boot/u-boot-uefi-secureboot.inc
@@ -0,0 +1,17 @@ 
+FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
+
+SRC_URI += "file://uefi-secureboot.cfg"
+
+inherit sbsign
+
+DEPENDS += 'python3-pyopenssl-native'
+
+do_compile:prepend() {
+    export CRYPTOGRAPHY_OPENSSL_NO_LEGACY=1
+
+    "${S}"/tools/efivar.py set -i "${S}"/ubootefi.var -n pk  -d "${SBSIGN_KEYS_DIR}"/PK.esl  -t file
+    "${S}"/tools/efivar.py set -i "${S}"/ubootefi.var -n kek -d "${SBSIGN_KEYS_DIR}"/KEK.esl -t file
+    "${S}"/tools/efivar.py set -i "${S}"/ubootefi.var -n db  -d "${SBSIGN_KEYS_DIR}"/db.esl  -t file
+    "${S}"/tools/efivar.py set -i "${S}"/ubootefi.var -n dbx -d "${SBSIGN_KEYS_DIR}"/dbx.esl -t file
+    "${S}"/tools/efivar.py print -i "${S}"/ubootefi.var
+}
diff --git a/meta-arm/recipes-bsp/u-boot/u-boot/uefi-secureboot.cfg b/meta-arm/recipes-bsp/u-boot/u-boot/uefi-secureboot.cfg
new file mode 100644
index 00000000..acdcfddd
--- /dev/null
+++ b/meta-arm/recipes-bsp/u-boot/u-boot/uefi-secureboot.cfg
@@ -0,0 +1,10 @@ 
+CONFIG_CMD_BOOTMENU=y
+CONFIG_USE_BOOTCOMMAND=y
+CONFIG_BOOTCOMMAND="bootmenu"
+CONFIG_USE_PREBOOT=y
+CONFIG_EFI_VAR_BUF_SIZE=65536
+CONFIG_FIT_SIGNATURE=y
+CONFIG_EFI_SECURE_BOOT=y
+CONFIG_EFI_VARIABLES_PRESEED=y
+CONFIG_PREBOOT="setenv bootmenu_0 UEFI Boot Manager=bootefi bootmgr; setenv bootmenu_1 UEFI Maintenance Menu=eficonfig"
+CONFIG_PREBOOT_DEFINED=y
diff --git a/meta-arm/recipes-bsp/u-boot/u-boot_%.bbappend b/meta-arm/recipes-bsp/u-boot/u-boot_%.bbappend
index 0683a783..8542ccfc 100644
--- a/meta-arm/recipes-bsp/u-boot/u-boot_%.bbappend
+++ b/meta-arm/recipes-bsp/u-boot/u-boot_%.bbappend
@@ -2,3 +2,5 @@  FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
 
 SRC_URI:append:qemuarm64-secureboot = " file://qemuarm64.cfg"
 SRC_URI:append:qemuarm-secureboot = " file://qemuarm.cfg"
+
+require ${@bb.utils.contains('MACHINE_FEATURES', 'uefi-secureboot', 'u-boot-uefi-secureboot.inc', '', d)}
diff --git a/meta-arm/recipes-core/systemd/systemd-boot-uefi-secureboot.inc b/meta-arm/recipes-core/systemd/systemd-boot-uefi-secureboot.inc
new file mode 100644
index 00000000..84196a68
--- /dev/null
+++ b/meta-arm/recipes-core/systemd/systemd-boot-uefi-secureboot.inc
@@ -0,0 +1,7 @@ 
+inherit sbsign
+
+SBSIGN_TARGET_BINARY = "${B}/src/boot/efi/systemd-boot${EFI_ARCH}.efi"
+
+do_compile:append() {
+    do_sbsign
+}
diff --git a/meta-arm/recipes-core/systemd/systemd-boot_%.bbappend b/meta-arm/recipes-core/systemd/systemd-boot_%.bbappend
new file mode 100644
index 00000000..9850bbf9
--- /dev/null
+++ b/meta-arm/recipes-core/systemd/systemd-boot_%.bbappend
@@ -0,0 +1 @@ 
+require ${@bb.utils.contains('MACHINE_FEATURES', 'uefi-secureboot', 'systemd-boot-uefi-secureboot.inc', '', d)}
diff --git a/meta-arm/recipes-core/systemd/systemd-efi.inc b/meta-arm/recipes-core/systemd/systemd-efi.inc
new file mode 100644
index 00000000..5572e51a
--- /dev/null
+++ b/meta-arm/recipes-core/systemd/systemd-efi.inc
@@ -0,0 +1 @@ 
+PACKAGECONFIG:append = " efi"
diff --git a/meta-arm/recipes-core/systemd/systemd_%.bbappend b/meta-arm/recipes-core/systemd/systemd_%.bbappend
new file mode 100644
index 00000000..660358c2
--- /dev/null
+++ b/meta-arm/recipes-core/systemd/systemd_%.bbappend
@@ -0,0 +1 @@ 
+require ${@bb.utils.contains('MACHINE_FEATURES', 'efi', 'systemd-efi.inc', '', d)}
diff --git a/meta-arm/recipes-kernel/linux/linux-yocto%.bbappend b/meta-arm/recipes-kernel/linux/linux-yocto%.bbappend
index a287d0e1..71e643a9 100644
--- a/meta-arm/recipes-kernel/linux/linux-yocto%.bbappend
+++ b/meta-arm/recipes-kernel/linux/linux-yocto%.bbappend
@@ -25,3 +25,5 @@  SRC_URI:append:qemuarm = " \
 
 FFA_TRANSPORT_INCLUDE = "${@bb.utils.contains('MACHINE_FEATURES', 'arm-ffa', 'arm-ffa-transport.inc', '' , d)}"
 require ${FFA_TRANSPORT_INCLUDE}
+
+require ${@bb.utils.contains('MACHINE_FEATURES', 'uefi-secureboot', 'linux-yocto-uefi-secureboot.inc', '', d)}
diff --git a/meta-arm/recipes-kernel/linux/linux-yocto-uefi-secureboot.inc b/meta-arm/recipes-kernel/linux/linux-yocto-uefi-secureboot.inc
new file mode 100644
index 00000000..5c1f4de7
--- /dev/null
+++ b/meta-arm/recipes-kernel/linux/linux-yocto-uefi-secureboot.inc
@@ -0,0 +1,14 @@ 
+KERNEL_FEATURES += "cfg/efi-ext.scc"
+
+inherit sbsign
+
+# shell variable set inside do_compile task
+SBSIGN_TARGET_BINARY = "$KERNEL_IMAGE"
+
+do_compile:append() {
+    KERNEL_IMAGE=$(find ${B} -name ${KERNEL_IMAGETYPE} -print -quit)
+    do_sbsign
+}
+
+RRECOMMENDS:${PN} += "kernel-module-efivarfs"
+RRECOMMENDS:${PN} += "kernel-module-efivars"