[PATCH 1/1] efi_selftest: implement printing GUIDs

[Heinrich Schuchardt]

The ESRT test may try to print a GUID if an error occurs.
Implement the %pU print code.

Correct the ESRT test to use %pU instead of %pUl to avoid the output
of character 'l'.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
---
 lib/efi_selftest/efi_selftest_console.c | 25 +++++++++++++++++++++++++
 lib/efi_selftest/efi_selftest_esrt.c    |  8 ++++----
 2 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/lib/efi_selftest/efi_selftest_console.c b/lib/efi_selftest/efi_selftest_console.c
index ffd88a1e26..3187e104c4 100644
--- a/lib/efi_selftest/efi_selftest_console.c
+++ b/lib/efi_selftest/efi_selftest_console.c
@@ -70,6 +70,28 @@ static void printx(u64 p, int prec, u16 **buf)
 	*buf = pos;
 }
 
+/**
+ * print_guid() - print GUID to an u16 string
+ *
+ * @p:		GUID to print
+ * @buf:	pointer to buffer address,
+ *		on return position of terminating zero word
+ */
+static void print_uuid(u8 *p, u16 **buf)
+{
+	int i;
+	const u8 seq[] = {
+		3, 2, 1, 0, '-', 5, 4, '-', 7, 6, '-',
+		8, 9, 10, 11, 12, 13, 14, 15 };
+
+	for (i = 0; i < sizeof(seq); ++i) {
+		if (seq[i] == '-')
+			*(*buf)++ = u'-';
+		else
+			printx(p[seq[i]], 2, buf);
+	}
+}
+
 /*
  * Print an unsigned 32bit value as decimal number to an u16 string
  *
@@ -212,6 +234,9 @@ void efi_st_printc(int color, const char *fmt, ...)
 					con_out->output_string(con_out, u);
 					pos = buf;
 					break;
+				case 'U':
+					print_uuid(va_arg(args, void*), &pos);
+					break;
 				default:
 					--c;
 					printx((uintptr_t)va_arg(args, void *),
diff --git a/lib/efi_selftest/efi_selftest_esrt.c b/lib/efi_selftest/efi_selftest_esrt.c
index 99251f22a5..99793dee72 100644
--- a/lib/efi_selftest/efi_selftest_esrt.c
+++ b/lib/efi_selftest/efi_selftest_esrt.c
@@ -121,28 +121,28 @@ static bool lib_test_check_uuid_entry(struct efi_system_resource_table *esrt,
 	for (u32 idx = 0; idx < filled_entries; idx++) {
 		if (!guidcmp(&entry[idx].fw_class, &img_info->image_type_id)) {
 			if (entry[idx].fw_version != img_info->version) {
-				efi_st_error("ESRT field mismatch for entry with fw_class=%pUl\n",
+				efi_st_error("ESRT field mismatch for entry with fw_class=%pU\n",
 					     &img_info->image_type_id);
 				return false;
 			}
 
 			if (entry[idx].lowest_supported_fw_version !=
 				img_info->lowest_supported_image_version) {
-				efi_st_error("ESRT field mismatch for entry with fw_class=%pUl\n",
+				efi_st_error("ESRT field mismatch for entry with fw_class=%pU\n",
 					     &img_info->image_type_id);
 				return false;
 			}
 
 			if (entry[idx].last_attempt_version !=
 				img_info->last_attempt_version) {
-				efi_st_error("ESRT field mismatch for entry with fw_class=%pUl\n",
+				efi_st_error("ESRT field mismatch for entry with fw_class=%pU\n",
 					     &img_info->image_type_id);
 				return false;
 			}
 
 			if (entry[idx].last_attempt_status !=
 				img_info->last_attempt_status) {
-				efi_st_error("ESRT field mismatch for entry with fw_class=%pUl\n",
+				efi_st_error("ESRT field mismatch for entry with fw_class=%pU\n",
 					     &img_info->image_type_id);
 				return false;
 			}
-- 
2.33.1