From 03b505eae6a276b8c38b6222694afb6cea10b1cc Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 20 Dec 2010 14:44:32 +0000 Subject: ARM: SMP: split out software TLB maintainence broadcasting smp.c is becoming too large, so split out the TLB maintainence broadcasting into a separate smp_tlb.c file. Signed-off-by: Russell King --- arch/arm/kernel/Makefile | 2 +- arch/arm/kernel/smp.c | 126 ----------------------------------------- arch/arm/kernel/smp_tlb.c | 139 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 140 insertions(+), 127 deletions(-) create mode 100644 arch/arm/kernel/smp_tlb.c diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index 5b9b268f4fbb..659937b0a896 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -29,7 +29,7 @@ obj-$(CONFIG_MODULES) += armksyms.o module.o obj-$(CONFIG_ARTHUR) += arthur.o obj-$(CONFIG_ISA_DMA) += dma-isa.o obj-$(CONFIG_PCI) += bios32.o isa.o -obj-$(CONFIG_SMP) += smp.o +obj-$(CONFIG_SMP) += smp.o smp_tlb.o obj-$(CONFIG_HAVE_ARM_SCU) += smp_scu.o obj-$(CONFIG_HAVE_ARM_TWD) += smp_twd.o obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 4dc864ef9cdf..6d0c66bc434d 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -38,7 +38,6 @@ #include #include #include -#include /* * as from 2.5, kernels no longer have an init_tasks structure @@ -655,128 +654,3 @@ int setup_profiling_timer(unsigned int multiplier) { return -EINVAL; } - -static void -on_each_cpu_mask(void (*func)(void *), void *info, int wait, - const struct cpumask *mask) -{ - preempt_disable(); - - smp_call_function_many(mask, func, info, wait); - if (cpumask_test_cpu(smp_processor_id(), mask)) - func(info); - - preempt_enable(); -} - -/**********************************************************************/ - -/* - * TLB operations - */ -struct tlb_args { - struct vm_area_struct *ta_vma; - unsigned long ta_start; - unsigned long ta_end; -}; - -static inline void ipi_flush_tlb_all(void *ignored) -{ - local_flush_tlb_all(); -} - -static inline void ipi_flush_tlb_mm(void *arg) -{ - struct mm_struct *mm = (struct mm_struct *)arg; - - local_flush_tlb_mm(mm); -} - -static inline void ipi_flush_tlb_page(void *arg) -{ - struct tlb_args *ta = (struct tlb_args *)arg; - - local_flush_tlb_page(ta->ta_vma, ta->ta_start); -} - -static inline void ipi_flush_tlb_kernel_page(void *arg) -{ - struct tlb_args *ta = (struct tlb_args *)arg; - - local_flush_tlb_kernel_page(ta->ta_start); -} - -static inline void ipi_flush_tlb_range(void *arg) -{ - struct tlb_args *ta = (struct tlb_args *)arg; - - local_flush_tlb_range(ta->ta_vma, ta->ta_start, ta->ta_end); -} - -static inline void ipi_flush_tlb_kernel_range(void *arg) -{ - struct tlb_args *ta = (struct tlb_args *)arg; - - local_flush_tlb_kernel_range(ta->ta_start, ta->ta_end); -} - -void flush_tlb_all(void) -{ - if (tlb_ops_need_broadcast()) - on_each_cpu(ipi_flush_tlb_all, NULL, 1); - else - local_flush_tlb_all(); -} - -void flush_tlb_mm(struct mm_struct *mm) -{ - if (tlb_ops_need_broadcast()) - on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, mm_cpumask(mm)); - else - local_flush_tlb_mm(mm); -} - -void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr) -{ - if (tlb_ops_need_broadcast()) { - struct tlb_args ta; - ta.ta_vma = vma; - ta.ta_start = uaddr; - on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, mm_cpumask(vma->vm_mm)); - } else - local_flush_tlb_page(vma, uaddr); -} - -void flush_tlb_kernel_page(unsigned long kaddr) -{ - if (tlb_ops_need_broadcast()) { - struct tlb_args ta; - ta.ta_start = kaddr; - on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1); - } else - local_flush_tlb_kernel_page(kaddr); -} - -void flush_tlb_range(struct vm_area_struct *vma, - unsigned long start, unsigned long end) -{ - if (tlb_ops_need_broadcast()) { - struct tlb_args ta; - ta.ta_vma = vma; - ta.ta_start = start; - ta.ta_end = end; - on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, mm_cpumask(vma->vm_mm)); - } else - local_flush_tlb_range(vma, start, end); -} - -void flush_tlb_kernel_range(unsigned long start, unsigned long end) -{ - if (tlb_ops_need_broadcast()) { - struct tlb_args ta; - ta.ta_start = start; - ta.ta_end = end; - on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1); - } else - local_flush_tlb_kernel_range(start, end); -} diff --git a/arch/arm/kernel/smp_tlb.c b/arch/arm/kernel/smp_tlb.c new file mode 100644 index 000000000000..7dcb35285be7 --- /dev/null +++ b/arch/arm/kernel/smp_tlb.c @@ -0,0 +1,139 @@ +/* + * linux/arch/arm/kernel/smp_tlb.c + * + * Copyright (C) 2002 ARM Limited, All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include +#include + +#include +#include + +static void on_each_cpu_mask(void (*func)(void *), void *info, int wait, + const struct cpumask *mask) +{ + preempt_disable(); + + smp_call_function_many(mask, func, info, wait); + if (cpumask_test_cpu(smp_processor_id(), mask)) + func(info); + + preempt_enable(); +} + +/**********************************************************************/ + +/* + * TLB operations + */ +struct tlb_args { + struct vm_area_struct *ta_vma; + unsigned long ta_start; + unsigned long ta_end; +}; + +static inline void ipi_flush_tlb_all(void *ignored) +{ + local_flush_tlb_all(); +} + +static inline void ipi_flush_tlb_mm(void *arg) +{ + struct mm_struct *mm = (struct mm_struct *)arg; + + local_flush_tlb_mm(mm); +} + +static inline void ipi_flush_tlb_page(void *arg) +{ + struct tlb_args *ta = (struct tlb_args *)arg; + + local_flush_tlb_page(ta->ta_vma, ta->ta_start); +} + +static inline void ipi_flush_tlb_kernel_page(void *arg) +{ + struct tlb_args *ta = (struct tlb_args *)arg; + + local_flush_tlb_kernel_page(ta->ta_start); +} + +static inline void ipi_flush_tlb_range(void *arg) +{ + struct tlb_args *ta = (struct tlb_args *)arg; + + local_flush_tlb_range(ta->ta_vma, ta->ta_start, ta->ta_end); +} + +static inline void ipi_flush_tlb_kernel_range(void *arg) +{ + struct tlb_args *ta = (struct tlb_args *)arg; + + local_flush_tlb_kernel_range(ta->ta_start, ta->ta_end); +} + +void flush_tlb_all(void) +{ + if (tlb_ops_need_broadcast()) + on_each_cpu(ipi_flush_tlb_all, NULL, 1); + else + local_flush_tlb_all(); +} + +void flush_tlb_mm(struct mm_struct *mm) +{ + if (tlb_ops_need_broadcast()) + on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, mm_cpumask(mm)); + else + local_flush_tlb_mm(mm); +} + +void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr) +{ + if (tlb_ops_need_broadcast()) { + struct tlb_args ta; + ta.ta_vma = vma; + ta.ta_start = uaddr; + on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, mm_cpumask(vma->vm_mm)); + } else + local_flush_tlb_page(vma, uaddr); +} + +void flush_tlb_kernel_page(unsigned long kaddr) +{ + if (tlb_ops_need_broadcast()) { + struct tlb_args ta; + ta.ta_start = kaddr; + on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1); + } else + local_flush_tlb_kernel_page(kaddr); +} + +void flush_tlb_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end) +{ + if (tlb_ops_need_broadcast()) { + struct tlb_args ta; + ta.ta_vma = vma; + ta.ta_start = start; + ta.ta_end = end; + on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, mm_cpumask(vma->vm_mm)); + } else + local_flush_tlb_range(vma, start, end); +} + +void flush_tlb_kernel_range(unsigned long start, unsigned long end) +{ + if (tlb_ops_need_broadcast()) { + struct tlb_args ta; + ta.ta_start = start; + ta.ta_end = end; + on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1); + } else + local_flush_tlb_kernel_range(start, end); +} + -- cgit v1.2.2