[PATCH V4 1/4] powerpc/firmware: Add definitions for new drc-info firmware feature

[Michael Bringmann]

Firmware Features: Define new bit flag representing the presence of
new device tree property "ibm,drc-info".  The flag is used to tell
the front end processor whether the Linux kernel supports the new
property, and by the front end processor to tell the Linux kernel
that the new property is present in the device tree.

Signed-off-by: Michael Bringmann <mwb at linux.vnet.ibm.com>
---
 arch/powerpc/include/asm/firmware.h       |    3 ++-
 arch/powerpc/include/asm/prom.h           |    1 +
 arch/powerpc/platforms/pseries/firmware.c |    1 +
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/firmware.h b/arch/powerpc/include/asm/firmware.h
index 8645897..329d537 100644
--- a/arch/powerpc/include/asm/firmware.h
+++ b/arch/powerpc/include/asm/firmware.h
@@ -51,6 +51,7 @@
 #define FW_FEATURE_BEST_ENERGY	ASM_CONST(0x0000000080000000)
 #define FW_FEATURE_TYPE1_AFFINITY ASM_CONST(0x0000000100000000)
 #define FW_FEATURE_PRRN		ASM_CONST(0x0000000200000000)
+#define FW_FEATURE_DRC_INFO	ASM_CONST(0x0000000400000000)
 
 #ifndef __ASSEMBLY__
 
@@ -67,7 +68,7 @@ enum {
 		FW_FEATURE_CMO | FW_FEATURE_VPHN | FW_FEATURE_XCMO |
 		FW_FEATURE_SET_MODE | FW_FEATURE_BEST_ENERGY |
 		FW_FEATURE_TYPE1_AFFINITY | FW_FEATURE_PRRN |
-		FW_FEATURE_HPT_RESIZE,
+		FW_FEATURE_HPT_RESIZE | FW_FEATURE_DRC_INFO,
 	FW_FEATURE_PSERIES_ALWAYS = 0,
 	FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL,
 	FW_FEATURE_POWERNV_ALWAYS = 0,
diff --git a/arch/powerpc/include/asm/prom.h b/arch/powerpc/include/asm/prom.h
index 825bd59..3243455 100644
--- a/arch/powerpc/include/asm/prom.h
+++ b/arch/powerpc/include/asm/prom.h
@@ -175,6 +175,7 @@ struct of_drconf_cell {
 #define OV5_HASH_GTSE		0x1940	/* Guest Translation Shoot Down Avail */
 /* Radix Table Extensions */
 #define OV5_RADIX_GTSE		0x1A40	/* Guest Translation Shoot Down Avail */
+#define OV5_DRC_INFO		0x1640	/* Redef Prop Structures: drc-info   */
 
 /* Option Vector 6: IBM PAPR hints */
 #define OV6_LINUX		0x02	/* Linux is our OS */
diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c
index 63cc82a..757d757 100644
--- a/arch/powerpc/platforms/pseries/firmware.c
+++ b/arch/powerpc/platforms/pseries/firmware.c
@@ -114,6 +114,7 @@ struct vec5_fw_feature {
 vec5_fw_features_table[] = {
 	{FW_FEATURE_TYPE1_AFFINITY,	OV5_TYPE1_AFFINITY},
 	{FW_FEATURE_PRRN,		OV5_PRRN},
+	{FW_FEATURE_DRC_INFO,		OV5_DRC_INFO},
 };
 
 static void __init fw_vec5_feature_init(const char *vec5, unsigned long len)