[RFC PATCH 1/6] powerpc/dexcr: Make all aspects CPU features

[Benjamin Gray <bgray@linux.ibm.com>]

The CPU_FEATURE_* mechanism is the only way right now to get
configuration from the "ibm,pa-features" devicetree node. Add a
CPU_FEATURE_* entry for each other DEXCR aspect that will be
exposed to userspace.

The NPHIE feature value is changed for consistency; the actual value is
never accessed or exposed to userspace, so there is no breakage.

Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
---
 arch/powerpc/include/asm/cputable.h | 6 +++++-
 arch/powerpc/kernel/prom.c          | 3 +++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
index 8765d5158324..bd087d0cb5fa 100644
--- a/arch/powerpc/include/asm/cputable.h
+++ b/arch/powerpc/include/asm/cputable.h
@@ -192,7 +192,10 @@ static inline void cpu_feature_keys_init(void) { }
 #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)
-#define CPU_FTR_DEXCR_NPHIE		LONG_ASM_CONST(0x0010000000000000)
+#define CPU_FTR_DEXCR_SBHE		LONG_ASM_CONST(0x0010000000000000)
+#define CPU_FTR_DEXCR_IBRTPD		LONG_ASM_CONST(0x0020000000000000)
+#define CPU_FTR_DEXCR_SRAPD		LONG_ASM_CONST(0x0040000000000000)
+#define CPU_FTR_DEXCR_NPHIE		LONG_ASM_CONST(0x0080000000000000)
 
 #ifndef __ASSEMBLY__
 
@@ -453,6 +456,7 @@ static inline void cpu_feature_keys_init(void) { }
 	    CPU_FTR_DBELL | CPU_FTR_HAS_PPR | CPU_FTR_ARCH_207S | \
 	    CPU_FTR_ARCH_300 | CPU_FTR_ARCH_31 | \
 	    CPU_FTR_DAWR | CPU_FTR_DAWR1 | \
+	    CPU_FTR_DEXCR_SBHE | CPU_FTR_DEXCR_IBRTPD | CPU_FTR_DEXCR_SRAPD | \
 	    CPU_FTR_DEXCR_NPHIE)
 #define CPU_FTRS_CELL	(CPU_FTR_LWSYNC | \
 	    CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 0b5878c3125b..ea081a5d2023 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -182,6 +182,9 @@ static struct ibm_feature ibm_pa_features[] __initdata = {
 	  .cpu_user_ftrs2 = PPC_FEATURE2_HTM_COMP | PPC_FEATURE2_HTM_NOSC_COMP },
 
 	{ .pabyte = 64, .pabit = 0, .cpu_features = CPU_FTR_DAWR1 },
+	{ .pabyte = 68, .pabit = 0, .cpu_features = CPU_FTR_DEXCR_SBHE },
+	{ .pabyte = 68, .pabit = 3, .cpu_features = CPU_FTR_DEXCR_IBRTPD },
+	{ .pabyte = 68, .pabit = 4, .cpu_features = CPU_FTR_DEXCR_SRAPD },
 	{ .pabyte = 68, .pabit = 5, .cpu_features = CPU_FTR_DEXCR_NPHIE },
 };
 
-- 
2.41.0