diff --git a/include/asm-ppc64/firmware.h b/include/asm-ppc64/firmware.h
index e3725f3..22bb85c 100644
--- a/include/asm-ppc64/firmware.h
+++ b/include/asm-ppc64/firmware.h
@@ -44,9 +44,10 @@
 #define FW_FEATURE_XDABR	(1UL<<18)
 #define FW_FEATURE_MULTITCE	(1UL<<19)
 #define FW_FEATURE_SPLPAR	(1UL<<20)
+#define FW_FEATURE_ISERIES	(1UL<<21)
 
 enum {
-	FW_FEATURE_PSERIES = FW_FEATURE_PFT | FW_FEATURE_TCE |
+	FW_FEATURE_PSERIES_POSSIBLE = FW_FEATURE_PFT | FW_FEATURE_TCE |
 		FW_FEATURE_SPRG0 | FW_FEATURE_DABR | FW_FEATURE_COPY |
 		FW_FEATURE_ASR | FW_FEATURE_DEBUG | FW_FEATURE_TERM |
 		FW_FEATURE_PERF | FW_FEATURE_DUMP | FW_FEATURE_INTERRUPT |
@@ -54,11 +55,25 @@
 		FW_FEATURE_VIO | FW_FEATURE_RDMA | FW_FEATURE_LLAN |
 		FW_FEATURE_BULK | FW_FEATURE_XDABR | FW_FEATURE_MULTITCE |
 		FW_FEATURE_SPLPAR,
+	FW_FEATURE_PSERIES_ALWAYS = 0,
+	FW_FEATURE_ISERIES_POSSIBLE = FW_FEATURE_ISERIES,
+	FW_FEATURE_ISERIES_ALWAYS = FW_FEATURE_ISERIES,
 	FW_FEATURE_POSSIBLE =
 #ifdef CONFIG_PPC_PSERIES
-		FW_FEATURE_PSERIES |
+		FW_FEATURE_PSERIES_POSSIBLE |
+#endif
+#ifdef CONFIG_PPC_ISERIES
+		FW_FEATURE_ISERIES_POSSIBLE |
 #endif
 		0,
+	FW_FEATURE_ALWAYS =
+#ifdef CONFIG_PPC_PSERIES
+		FW_FEATURE_PSERIES_ALWAYS &
+#endif
+#ifdef CONFIG_PPC_ISERIES
+		FW_FEATURE_ISERIES_ALWAYS &
+#endif
+		FW_FEATURE_POSSIBLE,
 };
 
 /* This is used to identify firmware features which are available
@@ -68,7 +83,8 @@
 
 static inline unsigned long firmware_has_feature(unsigned long feature)
 {
-	return ppc64_firmware_features & feature & FW_FEATURE_POSSIBLE;
+	return (FW_FEATURE_ALWAYS & feature) ||
+		(FW_FEATURE_POSSIBLE & ppc64_firmware_features & feature);
 }
 
 #ifdef CONFIG_PPC_PSERIES