x86: hob: Try to show a name instead of a GUID

GUIDs are one of the seven evils of the computer world. They obfuscate the
meaning and require people to look up long hex strings to decode it.

Luckily only a miniscule fraction of the 10^38 possible GUIDs are in use.

Add a way to decode the GUIDs known to U-Boot. Add a few more to the list
for good measure.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

arch/x86/include/asm/fsp/fsp_hob.h

@@ -99,4 +99,29 @@ struct __packed hob_graphics_info {
 	EFI_GUID(0x39f62cce, 0x6825, 0x4669, \
 		0xbb, 0x56, 0x54, 0x1a, 0xba, 0x75, 0x3a, 0x07)
 
+/* The following GUIDs are observed with FSP 2.1 / Apollo Lake */
+#define FSP_HOB_RESOURCE_OWNER_SMM_PEI_SMRAM_GUID \
+	EFI_GUID(0x6dadf1d1, 0xd4cc, 0x4910, \
+		0xbb, 0x6e, 0x82, 0xb1, 0xfd, 0x80, 0xff, 0x3d)
+
+#define FSP_HOB_RESOURCE_OWNER_PCD_DATABASE_GUID1 \
+	EFI_GUID(0xea296d92, 0x0b69, 0x423c, \
+		0x8c, 0x28, 0x33, 0xb4, 0xe0, 0xa9, 0x12, 0x68)
+
+#define FSP_HOB_RESOURCE_OWNER_PCD_DATABASE_GUID2 \
+	EFI_GUID(0x9b3ada4f, 0xae56, 0x4c24, \
+		0x8d, 0xea, 0xf0, 0x3b, 0x75, 0x58, 0xae, 0x50)
+
+#define FSP_HOB_RESOURCE_OWNER_PEIM_DXE_GUID \
+	EFI_GUID(0x86d70125, 0xbaa3, 0x4296, \
+		0xa6, 0x2f, 0x60, 0x2b, 0xeb, 0xbb, 0x90, 0x81)
+
+#define FSP_HOB_RESOURCE_OWNER_ALLOC_STACK_GUID \
+	EFI_GUID(0x4ed4bf27, 0x4092, 0x42e9, \
+		0x80, 0x7d, 0x52, 0x7b, 0x1d, 0x00, 0xc9, 0xbd)
+
+#define FSP_HOB_RESOURCE_OWNER_SMBIOS_MEMORY_GUID \
+	EFI_GUID(0x01a1108c, 0x9dee, 0x4984, \
+		0x88, 0xc3, 0xee, 0xe8, 0xc4, 0x9e, 0xfb, 0x89)
+
 #endif

cmd/x86/hob.c

@@ -8,6 +8,7 @@
 #include <efi.h>
 #include <uuid.h>
 #include <asm/hob.h>
+#include <asm/fsp/fsp_hob.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -26,6 +27,37 @@ static char *hob_type[] = {
 	"Capsule",
 };
 
+static struct guid_name {
+	efi_guid_t guid;
+	const char *name;
+} guid_name[] = {
+	{ FSP_HOB_RESOURCE_OWNER_TSEG_GUID, "TSEG" },
+	{ FSP_HOB_RESOURCE_OWNER_FSP_GUID, "FSP" },
+	{ FSP_HOB_RESOURCE_OWNER_SMM_PEI_SMRAM_GUID, "SMM PEI SMRAM" },
+	{ FSP_NON_VOLATILE_STORAGE_HOB_GUID, "NVS" },
+	{ FSP_VARIABLE_NV_DATA_HOB_GUID, "Variable NVS" },
+	{ FSP_GRAPHICS_INFO_HOB_GUID, "Graphics info" },
+	{ FSP_HOB_RESOURCE_OWNER_PCD_DATABASE_GUID1, "PCD database ea" },
+	{ FSP_HOB_RESOURCE_OWNER_PCD_DATABASE_GUID2, "PCD database 9b" },
+	{ FSP_HOB_RESOURCE_OWNER_PEIM_DXE_GUID, "PEIM Init DXE" },
+	{ FSP_HOB_RESOURCE_OWNER_ALLOC_STACK_GUID, "Alloc stack" },
+	{ FSP_HOB_RESOURCE_OWNER_SMBIOS_MEMORY_GUID, "SMBIOS memory" },
+	{ {}, "zero-guid" },
+	{}
+};
+
+static const char *guid_to_name(const efi_guid_t *guid)
+{
+	struct guid_name *entry;
+
+	for (entry = guid_name; entry->name; entry++) {
+		if (!guidcmp(guid, &entry->guid))
+			return entry->name;
+	}
+
+	return NULL;
+}
+
 static int do_hob(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	const struct hob_header *hdr;
@@ -65,9 +97,16 @@ static int do_hob(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 
 		if (type == HOB_TYPE_MEM_ALLOC || type == HOB_TYPE_RES_DESC ||
 		    type == HOB_TYPE_GUID_EXT) {
+			const char *name;
+
 			guid = (efi_guid_t *)(hdr + 1);
-			uuid_bin_to_str(guid->b, uuid, UUID_STR_FORMAT_GUID);
+			name = guid_to_name(guid);
-			printf("%s", uuid);
+			if (!name) {
+				uuid_bin_to_str(guid->b, uuid,
+						UUID_STR_FORMAT_GUID);
+				name = uuid;
+			}
+			printf("%36s", name);
 		} else {
 			printf("%36s", "Not Available");
 		}