Commit 81984428 authored by Alastair D'Silva's avatar Alastair D'Silva Committed by Michael Ellerman

powerpc: Add TIDR CPU feature for POWER9

This patch adds a CPU feature bit to show whether the CPU has
the TIDR register available, enabling as_notify/wait in userspace.
Signed-off-by: default avatarAlastair D'Silva <alastair@d-silva.org>
Reviewed-by: default avatarFrederic Barrat <fbarrat@linux.vnet.ibm.com>
Reviewed-by: default avatarAndrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 56c0b48b
...@@ -215,6 +215,7 @@ static inline void cpu_feature_keys_init(void) { } ...@@ -215,6 +215,7 @@ static inline void cpu_feature_keys_init(void) { }
#define CPU_FTR_P9_TM_HV_ASSIST LONG_ASM_CONST(0x0000100000000000) #define CPU_FTR_P9_TM_HV_ASSIST LONG_ASM_CONST(0x0000100000000000)
#define CPU_FTR_P9_TM_XER_SO_BUG LONG_ASM_CONST(0x0000200000000000) #define CPU_FTR_P9_TM_XER_SO_BUG LONG_ASM_CONST(0x0000200000000000)
#define CPU_FTR_P9_TLBIE_BUG LONG_ASM_CONST(0x0000400000000000) #define CPU_FTR_P9_TLBIE_BUG LONG_ASM_CONST(0x0000400000000000)
#define CPU_FTR_P9_TIDR LONG_ASM_CONST(0x0000800000000000)
#ifndef __ASSEMBLY__ #ifndef __ASSEMBLY__
...@@ -462,7 +463,7 @@ static inline void cpu_feature_keys_init(void) { } ...@@ -462,7 +463,7 @@ static inline void cpu_feature_keys_init(void) { }
CPU_FTR_CFAR | CPU_FTR_HVMODE | CPU_FTR_VMX_COPY | \ CPU_FTR_CFAR | CPU_FTR_HVMODE | CPU_FTR_VMX_COPY | \
CPU_FTR_DBELL | CPU_FTR_HAS_PPR | CPU_FTR_ARCH_207S | \ CPU_FTR_DBELL | CPU_FTR_HAS_PPR | CPU_FTR_ARCH_207S | \
CPU_FTR_TM_COMP | CPU_FTR_ARCH_300 | CPU_FTR_PKEY | \ CPU_FTR_TM_COMP | CPU_FTR_ARCH_300 | CPU_FTR_PKEY | \
CPU_FTR_P9_TLBIE_BUG) CPU_FTR_P9_TLBIE_BUG | CPU_FTR_P9_TIDR)
#define CPU_FTRS_POWER9_DD1 ((CPU_FTRS_POWER9 | CPU_FTR_POWER9_DD1) & \ #define CPU_FTRS_POWER9_DD1 ((CPU_FTRS_POWER9 | CPU_FTR_POWER9_DD1) & \
(~CPU_FTR_SAO)) (~CPU_FTR_SAO))
#define CPU_FTRS_POWER9_DD2_0 CPU_FTRS_POWER9 #define CPU_FTRS_POWER9_DD2_0 CPU_FTRS_POWER9
......
...@@ -717,6 +717,7 @@ static __init void cpufeatures_cpu_quirks(void) ...@@ -717,6 +717,7 @@ static __init void cpufeatures_cpu_quirks(void)
if ((version & 0xffff0000) == 0x004e0000) { if ((version & 0xffff0000) == 0x004e0000) {
cur_cpu_spec->cpu_features &= ~(CPU_FTR_DAWR); cur_cpu_spec->cpu_features &= ~(CPU_FTR_DAWR);
cur_cpu_spec->cpu_features |= CPU_FTR_P9_TLBIE_BUG; cur_cpu_spec->cpu_features |= CPU_FTR_P9_TLBIE_BUG;
cur_cpu_spec->cpu_features |= CPU_FTR_P9_TIDR;
} }
/* /*
......
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