1 files changed, 16 insertions, 11 deletions
diff --git a/MdePkg/Include/Uefi/UefiSpec.h b/MdePkg/Include/Uefi/UefiSpec.h
index 243f33078a..d38a5571af 100644
--- a/MdePkg/Include/Uefi/UefiSpec.h
+++ b/MdePkg/Include/Uefi/UefiSpec.h
@@ -63,30 +63,35 @@ typedef enum {
 //
 // Memory cacheability attributes
 //
-#define EFI_MEMORY_UC   0x0000000000000001ULL
-#define EFI_MEMORY_WC   0x0000000000000002ULL
-#define EFI_MEMORY_WT   0x0000000000000004ULL
-#define EFI_MEMORY_WB   0x0000000000000008ULL
-#define EFI_MEMORY_UCE  0x0000000000000010ULL
+#define EFI_MEMORY_UC               0x0000000000000001ULL
+#define EFI_MEMORY_WC               0x0000000000000002ULL
+#define EFI_MEMORY_WT               0x0000000000000004ULL
+#define EFI_MEMORY_WB               0x0000000000000008ULL
+#define EFI_MEMORY_UCE              0x0000000000000010ULL
 //
 // Physical memory protection attributes
 //
 // Note: UEFI spec 2.5 and following: use EFI_MEMORY_RO as write-protected physical memory
 // protection attribute. Also, EFI_MEMORY_WP means cacheability attribute.
 //
-#define EFI_MEMORY_WP   0x0000000000001000ULL
-#define EFI_MEMORY_RP   0x0000000000002000ULL
-#define EFI_MEMORY_XP   0x0000000000004000ULL
-#define EFI_MEMORY_RO   0x0000000000020000ULL
+#define EFI_MEMORY_WP               0x0000000000001000ULL
+#define EFI_MEMORY_RP               0x0000000000002000ULL
+#define EFI_MEMORY_XP               0x0000000000004000ULL
+#define EFI_MEMORY_RO               0x0000000000020000ULL
 //
 // Physical memory persistence attribute. 
 // The memory region supports byte-addressable non-volatility.
 //
-#define EFI_MEMORY_NV   0x0000000000008000ULL
+#define EFI_MEMORY_NV               0x0000000000008000ULL
+//
+// The memory region provides higher reliability relative to other memory in the system.
+// If all memory has the same reliability, then this bit is not used.
+//
+#define EFI_MEMORY_MORE_RELIABLE    0x0000000000010000ULL
 //
 // Runtime memory attribute
 //
-#define EFI_MEMORY_RUNTIME  0x8000000000000000ULL
+#define EFI_MEMORY_RUNTIME          0x8000000000000000ULL
 
 ///
 /// Memory descriptor version number.