linux-kernel - [PATCH v5 05/10] powerpc/dt_cpu_ftrs: Add feature for 2nd DAWR

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Message-Id: <20200723090813.303838-6-ravi.bangoria@linux.ibm.com>
Date:   Thu, 23 Jul 2020 14:38:08 +0530
From:   Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
To:     mpe@...erman.id.au, mikey@...ling.org
Cc:     ravi.bangoria@...ux.ibm.com, paulus@...ba.org, npiggin@...il.com,
        christophe.leroy@....fr, naveen.n.rao@...ux.vnet.ibm.com,
        peterz@...radead.org, jolsa@...nel.org, oleg@...hat.com,
        fweisbec@...il.com, mingo@...nel.org, pedromfc@...ibm.com,
        miltonm@...ibm.com, jniethe5@...il.com, rogealve@...ibm.com,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH v5 05/10] 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@...ux.ibm.com>
---
 arch/powerpc/include/asm/cputable.h | 3 ++-
 arch/powerpc/kernel/dt_cpu_ftrs.c   | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
index e506d429b1af..5583f2d08df7 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__
 
@@ -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_PKEY | \
-	    CPU_FTR_ARCH_31 | CPU_FTR_DAWR)
+	    CPU_FTR_ARCH_31 | 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 ac650c233cd9..675b824038f9 100644
--- a/arch/powerpc/kernel/dt_cpu_ftrs.c
+++ b/arch/powerpc/kernel/dt_cpu_ftrs.c
@@ -649,6 +649,7 @@ 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;
-- 
2.26.2