Le 18/04/2018 à 03:08, Alastair D'Silva a écrit :
From: Alastair D'Silva <alast...@d-silva.org> 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: Alastair D'Silva <alast...@d-silva.org> --- 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 4e332f3531c5..54c4cbbe57b4 100644 --- a/arch/powerpc/include/asm/cputable.h +++ b/arch/powerpc/include/asm/cputable.h @@ -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_XER_SO_BUG LONG_ASM_CONST(0x0000200000000000) #define CPU_FTR_P9_TLBIE_BUG LONG_ASM_CONST(0x0000400000000000) +#define CPU_FTR_P9_TIDR LONG_ASM_CONST(0x0000800000000000) #ifndef __ASSEMBLY__ @@ -462,7 +463,7 @@ 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_P9_TLBIE_BUG) + CPU_FTR_P9_TLBIE_BUG | CPU_FTR_P9_TIDR) #define CPU_FTRS_POWER9_DD1 ((CPU_FTRS_POWER9 | CPU_FTR_POWER9_DD1) & \ (~CPU_FTR_SAO)) #define CPU_FTRS_POWER9_DD2_0 CPU_FTRS_POWER9 diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c index 11a3a4fed3fb..10f8b7f55637 100644 --- a/arch/powerpc/kernel/dt_cpu_ftrs.c +++ b/arch/powerpc/kernel/dt_cpu_ftrs.c @@ -722,6 +722,7 @@ static __init void cpufeatures_cpu_quirks(void) if ((version & 0xffff0000) == 0x004e0000) { 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_TIDR;
Isn't it redundant with adding the flag to CPU_FTRS_POWER9? Fred
} }