[PATCH 2/3] selftests/kexec: Enable secureboot tests for PowerPC

[Nageswara R Sastry <rnsastry@linux.ibm.com>]

Existing test cases determine secureboot state using efi variable, which is
available only on x86 architecture.
Add support for determining secureboot state using device tree property on
PowerPC architecture.

Signed-off-by: Nageswara R Sastry <rnsastry@linux.ibm.com>
---
 tools/testing/selftests/kexec/Makefile        |  2 +-
 .../selftests/kexec/kexec_common_lib.sh       | 38 ++++++++++++++++---
 .../selftests/kexec/test_kexec_file_load.sh   |  8 +++-
 3 files changed, 39 insertions(+), 9 deletions(-)

diff --git a/tools/testing/selftests/kexec/Makefile b/tools/testing/selftests/kexec/Makefile
index aa91d2063249..806a150648c3 100644
--- a/tools/testing/selftests/kexec/Makefile
+++ b/tools/testing/selftests/kexec/Makefile
@@ -4,7 +4,7 @@
 uname_M := $(shell uname -m 2>/dev/null || echo not)
 ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
 
-ifeq ($(ARCH),x86)
+ifeq ($(ARCH),$(filter $(ARCH),x86 ppc64le))
 TEST_PROGS := test_kexec_load.sh test_kexec_file_load.sh
 TEST_FILES := kexec_common_lib.sh
 
diff --git a/tools/testing/selftests/kexec/kexec_common_lib.sh b/tools/testing/selftests/kexec/kexec_common_lib.sh
index 43017cfe88f7..e907c3030eb3 100755
--- a/tools/testing/selftests/kexec/kexec_common_lib.sh
+++ b/tools/testing/selftests/kexec/kexec_common_lib.sh
@@ -91,6 +91,27 @@ get_efi_var_secureboot_mode()
 	return 0;
 }
 
+# On powerpc platform, check device-tree property
+# /proc/device-tree/ibm,secureboot/os-secureboot-enforcing
+# to detect secureboot state.
+get_ppc64_secureboot_mode()
+{
+	local secure_boot_file="/proc/device-tree/ibm,secureboot/os-secureboot-enforcing"
+	# Check for secure boot file existence
+	if [ -f $secure_boot_file ]; then
+		log_info "Secureboot is enabled (Device tree)"
+		return 1;
+	fi
+	log_info "Secureboot is not enabled (Device tree)"
+	return 0;
+}
+
+# Return the architecture of the system
+get_arch()
+{
+	echo $(arch)
+}
+
 # Check efivar SecureBoot-$(the UUID) and SetupMode-$(the UUID).
 # The secure boot mode can be accessed either as the last integer
 # of "od -An -t u1 /sys/firmware/efi/efivars/SecureBoot-*" or from
@@ -100,14 +121,19 @@ get_efi_var_secureboot_mode()
 get_secureboot_mode()
 {
 	local secureboot_mode=0
+	local system_arch=$(get_arch)
 
-	get_efivarfs_secureboot_mode
-	secureboot_mode=$?
-
-	# fallback to using the efi_var files
-	if [ $secureboot_mode -eq 0 ]; then
-		get_efi_var_secureboot_mode
+	if [ "$system_arch" == "ppc64le" ]; then
+		get_ppc64_secureboot_mode
 		secureboot_mode=$?
+	else
+		get_efivarfs_secureboot_mode
+		secureboot_mode=$?
+		# fallback to using the efi_var files
+		if [ $secureboot_mode -eq 0 ]; then
+			get_efi_var_secureboot_mode
+			secureboot_mode=$?
+		fi
 	fi
 
 	if [ $secureboot_mode -eq 0 ]; then
diff --git a/tools/testing/selftests/kexec/test_kexec_file_load.sh b/tools/testing/selftests/kexec/test_kexec_file_load.sh
index 99f6fc23ee31..c9ccb3c93d72 100755
--- a/tools/testing/selftests/kexec/test_kexec_file_load.sh
+++ b/tools/testing/selftests/kexec/test_kexec_file_load.sh
@@ -226,8 +226,12 @@ get_secureboot_mode
 secureboot=$?
 
 # Are there pe and ima signatures
-check_for_pesig
-pe_signed=$?
+if [ "$(get_arch)" == 'ppc64le' ]; then
+	pe_signed=0
+else
+	check_for_pesig
+	pe_signed=$?
+fi
 
 check_for_imasig
 ima_signed=$?
-- 
2.23.0