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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2005-06-28 13:49:16 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-06-28 13:49:16 +0100
commit4b0ef3b1127776d4a2787d7530ac0c4da82c2331 (patch)
treebe7e11c8d325e757f1f4c0caf825966eb4d9c7b8 /arch
parent564c90aa07cd43dc434d46cef8a15773a23d49a2 (diff)
[PATCH] ARM SMP: Add IPI support code for SMP TLB flushing
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/kernel/smp.c123
1 files changed, 123 insertions, 0 deletions
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 34892758f09..a931409c8fe 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -502,3 +502,126 @@ int __init setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
+
+static int
+on_each_cpu_mask(void (*func)(void *), void *info, int retry, int wait,
+ cpumask_t mask)
+{
+ int ret = 0;
+
+ preempt_disable();
+
+ ret = smp_call_function_on_cpu(func, info, retry, wait, mask);
+ if (cpu_isset(smp_processor_id(), mask))
+ func(info);
+
+ preempt_enable();
+
+ return ret;
+}
+
+/**********************************************************************/
+
+/*
+ * 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)
+{
+ on_each_cpu(ipi_flush_tlb_all, NULL, 1, 1);
+}
+
+void flush_tlb_mm(struct mm_struct *mm)
+{
+ cpumask_t mask = mm->cpu_vm_mask;
+
+ on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, 1, mask);
+}
+
+void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
+{
+ cpumask_t mask = vma->vm_mm->cpu_vm_mask;
+ struct tlb_args ta;
+
+ ta.ta_vma = vma;
+ ta.ta_start = uaddr;
+
+ on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, 1, mask);
+}
+
+void flush_tlb_kernel_page(unsigned long kaddr)
+{
+ struct tlb_args ta;
+
+ ta.ta_start = kaddr;
+
+ on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1, 1);
+}
+
+void flush_tlb_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end)
+{
+ cpumask_t mask = vma->vm_mm->cpu_vm_mask;
+ 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, 1, mask);
+}
+
+void flush_tlb_kernel_range(unsigned long start, unsigned long end)
+{
+ struct tlb_args ta;
+
+ ta.ta_start = start;
+ ta.ta_end = end;
+
+ on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1, 1);
+}