6 files changed, 59 insertions, 0 deletions
diff --git a/src/security/intel/Kconfig b/src/security/intel/Kconfig
index 9cdd8a6610..0609a45684 100644
--- a/src/security/intel/Kconfig
+++ b/src/security/intel/Kconfig
@@ -2,3 +2,4 @@
 
 source "src/security/intel/txt/Kconfig"
 source "src/security/intel/stm/Kconfig"
+source "src/security/intel/cbnt/Kconfig"
diff --git a/src/security/intel/Makefile.inc b/src/security/intel/Makefile.inc
index e00802ad06..20aea273e0 100644
--- a/src/security/intel/Makefile.inc
+++ b/src/security/intel/Makefile.inc
@@ -1,2 +1,3 @@
 subdirs-y += txt
 subdirs-y += stm
+subdirs-y += cbnt
diff --git a/src/security/intel/cbnt/Kconfig b/src/security/intel/cbnt/Kconfig
new file mode 100644
index 0000000000..f13f6ec59c
--- /dev/null
+++ b/src/security/intel/cbnt/Kconfig
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config INTEL_CBNT_SUPPORT
+	bool "Intel CBnT support"
+	default n
+	depends on CPU_INTEL_FIRMWARE_INTERFACE_TABLE
+	#depends on PLATFORM_HAS_DRAM_CLEAR
+	select INTEL_TXT
+	help
+	  Enables Intel Converged Bootguard and Trusted Execution Technology
+	  Support. This will enable one to add a Key Manifest (KM) and a Boot
+	  Policy Manifest (BPM) to the filesystem. It will also wrap a FIT around
+	  the firmware and update appropriate entries.
+
+if INTEL_CBNT_SUPPORT
+
+config INTEL_CBNT_KEY_MANIFEST_BINARY
+	string "KM (Key Manifest) binary location"
+	help
+	  Location of the Key Manifest (KM)
+
+config INTEL_CBNT_BOOT_POLICY_MANIFEST_BINARY
+	string "BPM (Boot Policy Manifest) binary location"
+	help
+	  Location of the Boot Policy Manifest (BPM)
+
+endif # INTEL_CBNT_SUPPORT
diff --git a/src/security/intel/cbnt/Makefile.inc b/src/security/intel/cbnt/Makefile.inc
new file mode 100644
index 0000000000..f2e5c76dba
--- /dev/null
+++ b/src/security/intel/cbnt/Makefile.inc
@@ -0,0 +1,25 @@
+ifeq ($(CONFIG_INTEL_CBNT_SUPPORT),y)
+
+ifneq ($(CONFIG_INTEL_CBNT_BOOT_POLICY_MANIFEST_BINARY),"")
+cbfs-files-y += boot_policy_manifest.bin
+boot_policy_manifest.bin-file := $(CONFIG_INTEL_CBNT_BOOT_POLICY_MANIFEST_BINARY)
+boot_policy_manifest.bin-type := raw
+boot_policy_manifest.bin-align := 0x10
+
+INTERMEDIATE+=add_bpm_fit
+add_bpm_fit: $(obj)/coreboot.pre $(IFITTOOL)
+	$(IFITTOOL) -r COREBOOT -a -n boot_policy_manifest.bin -t 12 -s $(CONFIG_CPU_INTEL_NUM_FIT_ENTRIES) -f $<
+endif
+
+ifneq ($(CONFIG_INTEL_CBNT_KEY_MANIFEST_BINARY),"")
+cbfs-files-y += key_manifest.bin
+key_manifest.bin-file := $(CONFIG_INTEL_CBNT_KEY_MANIFEST_BINARY)
+key_manifest.bin-type := raw
+key_manifest.bin-align := 0x10
+
+INTERMEDIATE+=add_km_fit
+add_km_fit: $(obj)/coreboot.pre $(IFITTOOL)
+	$(IFITTOOL) -r COREBOOT -a -n key_manifest.bin -t 11 -s $(CONFIG_CPU_INTEL_NUM_FIT_ENTRIES) -f $<
+endif
+
+endif # CONFIG_INTEL_CBNT_SUPPORT
diff --git a/src/security/intel/txt/Kconfig b/src/security/intel/txt/Kconfig
index 80be7c29e9..f9e4bc4bf4 100644
--- a/src/security/intel/txt/Kconfig
+++ b/src/security/intel/txt/Kconfig
@@ -52,6 +52,7 @@ config INTEL_TXT_LOGGING
 
 config INTEL_TXT_BIOSACM_ALIGNMENT
 	hex
+	default 0x40000 if INTEL_CBNT_SUPPORT
 	default 0x20000 # 128 KiB
 	help
 	  Exceptions are Ivy and Sandy Bridge with 64 KiB and Purley with 256 KiB
diff --git a/src/security/intel/txt/Makefile.inc b/src/security/intel/txt/Makefile.inc
index eab47b95f9..77a5f69f2a 100644
--- a/src/security/intel/txt/Makefile.inc
+++ b/src/security/intel/txt/Makefile.inc
@@ -33,6 +33,8 @@ add_acm_fit: $(obj)/coreboot.pre $(IFITTOOL)
 	$(IFITTOOL) -r COREBOOT -a -n $(CONFIG_INTEL_TXT_CBFS_BIOS_ACM) -t 2 \
         	-s $(CONFIG_CPU_INTEL_NUM_FIT_ENTRIES) -f $<
 
+# CBnT does not use FIT for IBB
+ifneq ($(CONFIG_INTEL_CBNT_SUPPORT),y)
 # Initial BootBlock files
 ibb-files := $(foreach file,$(cbfs-files), \
         $(if $(shell echo '$(call extract_nth,7,$(file))'|grep -- --ibb), \
@@ -45,6 +47,8 @@ add_ibb_fit: $(obj)/coreboot.pre $(IFITTOOL)
 	$(foreach file, $(ibb-files), $(shell $(IFITTOOL) -f $< -a -n $(file) -t 7 \
                 -s $(CONFIG_CPU_INTEL_NUM_FIT_ENTRIES) -r COREBOOT)) true
 
+endif # INTEL_CBNT_SUPPORT
+
 endif # CPU_INTEL_FIRMWARE_INTERFACE_TABLE
 
 endif # INTEL_TXT