powerpc/dt_cpu_ftrs: Add feature for 2nd DAWR

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.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200723090813.303838-6-ravi.bangoria@linux.ibm.com

diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
index a0453fc..d36db35 100644 (file)
--- 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__
 
@@ -478,7 +479,7 @@ static inline void cpu_feature_keys_init(void) { }
            CPU_FTR_CFAR | CPU_FTR_HVMODE | CPU_FTR_VMX_COPY | \
            CPU_FTR_DBELL | CPU_FTR_HAS_PPR | CPU_FTR_ARCH_207S | \
            CPU_FTR_TM_COMP | CPU_FTR_ARCH_300 | CPU_FTR_ARCH_31 | \
-           CPU_FTR_DAWR)
+           CPU_FTR_DAWR | CPU_FTR_DAWR1)
 #define CPU_FTRS_CELL  (CPU_FTR_LWSYNC | \
            CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \
            CPU_FTR_ALTIVEC_COMP | CPU_FTR_MMCRA | CPU_FTR_SMT | \

diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c
index 22ba7fb..6f8c0c6 100644 (file)
--- a/arch/powerpc/kernel/dt_cpu_ftrs.c
+++ b/arch/powerpc/kernel/dt_cpu_ftrs.c
@@ -686,6 +686,7 @@ 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, CPU_FTR_DAWR1},
 };
 
 static bool __initdata using_dt_cpu_ftrs;