[PATCH v3 4/9] powerpc/dt_cpu_ftrs: Add feature for 2nd DAWR

[Ravi Bangoria]

Add new device-tree feature for 2nd DAWR. If this feature is present,
2nd DAWR is supported, otherwise not.

Signed-off-by: Ravi Bangoria <ravi.bango...@linux.ibm.com>
---
 arch/powerpc/include/asm/cputable.h | 7 +++++--
 arch/powerpc/kernel/dt_cpu_ftrs.c   | 7 +++++++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/include/asm/cputable.h 
b/arch/powerpc/include/asm/cputable.h
index e506d429b1af..3445c86e1f6f 100644
--- a/arch/powerpc/include/asm/cputable.h
+++ b/arch/powerpc/include/asm/cputable.h
@@ -214,6 +214,7 @@ static inline void cpu_feature_keys_init(void) { }
 #define CPU_FTR_P9_TLBIE_ERAT_BUG      LONG_ASM_CONST(0x0001000000000000)
 #define CPU_FTR_P9_RADIX_PREFETCH_BUG  LONG_ASM_CONST(0x0002000000000000)
 #define CPU_FTR_ARCH_31                        
LONG_ASM_CONST(0x0004000000000000)
+#define CPU_FTR_DAWR1                  LONG_ASM_CONST(0x0008000000000000)
 
 #ifndef __ASSEMBLY__
 
@@ -497,14 +498,16 @@ static inline void cpu_feature_keys_init(void) { }
 #define CPU_FTRS_POSSIBLE      \
            (CPU_FTRS_POWER7 | CPU_FTRS_POWER8E | CPU_FTRS_POWER8 | \
             CPU_FTR_ALTIVEC_COMP | CPU_FTR_VSX_COMP | CPU_FTRS_POWER9 | \
-            CPU_FTRS_POWER9_DD2_1 | CPU_FTRS_POWER9_DD2_2 | CPU_FTRS_POWER10)
+            CPU_FTRS_POWER9_DD2_1 | CPU_FTRS_POWER9_DD2_2 | CPU_FTRS_POWER10 | 
\
+            CPU_FTR_DAWR1)
 #else
 #define CPU_FTRS_POSSIBLE      \
            (CPU_FTRS_PPC970 | CPU_FTRS_POWER5 | \
             CPU_FTRS_POWER6 | CPU_FTRS_POWER7 | CPU_FTRS_POWER8E | \
             CPU_FTRS_POWER8 | CPU_FTRS_CELL | CPU_FTRS_PA6T | \
             CPU_FTR_VSX_COMP | CPU_FTR_ALTIVEC_COMP | CPU_FTRS_POWER9 | \
-            CPU_FTRS_POWER9_DD2_1 | CPU_FTRS_POWER9_DD2_2 | CPU_FTRS_POWER10)
+            CPU_FTRS_POWER9_DD2_1 | CPU_FTRS_POWER9_DD2_2 | CPU_FTRS_POWER10 | 
\
+            CPU_FTR_DAWR1)
 #endif /* CONFIG_CPU_LITTLE_ENDIAN */
 #endif
 #else
diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c 
b/arch/powerpc/kernel/dt_cpu_ftrs.c
index a0edeb391e3e..be694567cebd 100644
--- a/arch/powerpc/kernel/dt_cpu_ftrs.c
+++ b/arch/powerpc/kernel/dt_cpu_ftrs.c
@@ -573,6 +573,12 @@ static int __init feat_enable_mma(struct dt_cpu_feature *f)
        return 1;
 }
 
+static int __init feat_enable_debug_facilities_v31(struct dt_cpu_feature *f)
+{
+       cur_cpu_spec->cpu_features |= CPU_FTR_DAWR1;
+       return 1;
+}
+
 struct dt_cpu_feature_match {
        const char *name;
        int (*enable)(struct dt_cpu_feature *f);
@@ -648,6 +654,7 @@ static struct dt_cpu_feature_match __initdata
        {"wait-v3", feat_enable, 0},
        {"prefix-instructions", feat_enable, 0},
        {"matrix-multiply-assist", feat_enable_mma, 0},
+       {"debug-facilities-v31", feat_enable_debug_facilities_v31, 0},
 };
 
 static bool __initdata using_dt_cpu_ftrs;
-- 
2.26.2