diff options
| author | Will Deacon <will.deacon@arm.com> | 2013-02-18 22:07:47 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2013-08-12 12:25:44 +0100 |
| commit | 2c813980c6113ac2c407fbed99f53242088c3038 (patch) | |
| tree | bc68fc216c14179d10b2ddc5a86129550e4c9531 | |
| parent | 587b9b6487acddf777301c867c24f31fdf4ada4a (diff) | |
| download | linux-2c813980c6113ac2c407fbed99f53242088c3038.tar.bz2 | |
ARM: tlb: don't perform inner-shareable invalidation for local BP ops
Now that the ASID allocator doesn't require inner-shareable maintenance,
we can convert the local_bp_flush_all function to perform only
non-shareable flushing, in a similar manner to the TLB invalidation
routines.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
| -rw-r--r-- | arch/arm/include/asm/tlbflush.h | 22 | ||||
| -rw-r--r-- | arch/arm/kernel/smp_tlb.c | 2 |
2 files changed, 21 insertions, 3 deletions
diff --git a/arch/arm/include/asm/tlbflush.h b/arch/arm/include/asm/tlbflush.h index 9b725d2bcb6b..84718240340c 100644 --- a/arch/arm/include/asm/tlbflush.h +++ b/arch/arm/include/asm/tlbflush.h @@ -531,17 +531,35 @@ static inline void __flush_tlb_kernel_page(unsigned long kaddr) * Branch predictor maintenance is paired with full TLB invalidation, so * there is no need for any barriers here. */ +static inline void __local_flush_bp_all(void) +{ + const int zero = 0; + const unsigned int __tlb_flag = __cpu_tlb_flags; + + if (tlb_flag(TLB_V6_BP)) + asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero)); +} + static inline void local_flush_bp_all(void) { const int zero = 0; const unsigned int __tlb_flag = __cpu_tlb_flags; + __local_flush_bp_all(); if (tlb_flag(TLB_V7_UIS_BP)) - asm("mcr p15, 0, %0, c7, c1, 6" : : "r" (zero)); - else if (tlb_flag(TLB_V6_BP)) asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero)); } +static inline void __flush_bp_all(void) +{ + const int zero = 0; + const unsigned int __tlb_flag = __cpu_tlb_flags; + + __local_flush_bp_all(); + if (tlb_flag(TLB_V7_UIS_BP)) + asm("mcr p15, 0, %0, c7, c1, 6" : : "r" (zero)); +} + #include <asm/cputype.h> #ifdef CONFIG_ARM_ERRATA_798181 static inline int erratum_a15_798181(void) diff --git a/arch/arm/kernel/smp_tlb.c b/arch/arm/kernel/smp_tlb.c index 5883b8ae77c8..83ccca303df8 100644 --- a/arch/arm/kernel/smp_tlb.c +++ b/arch/arm/kernel/smp_tlb.c @@ -173,5 +173,5 @@ void flush_bp_all(void) if (tlb_ops_need_broadcast()) on_each_cpu(ipi_flush_bp_all, NULL, 1); else - local_flush_bp_all(); + __flush_bp_all(); } |