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-rw-r--r--arch/arm/mm/flush.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c
index b103e56806bd..d438ce41cdd5 100644
--- a/arch/arm/mm/flush.c
+++ b/arch/arm/mm/flush.c
@@ -87,6 +87,32 @@ void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsig
87 if (cache_is_vipt_aliasing()) 87 if (cache_is_vipt_aliasing())
88 flush_pfn_alias(pfn, user_addr); 88 flush_pfn_alias(pfn, user_addr);
89} 89}
90
91void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
92 unsigned long uaddr, void *kaddr,
93 unsigned long len, int write)
94{
95 if (cache_is_vivt()) {
96 if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) {
97 unsigned long addr = (unsigned long)kaddr;
98 __cpuc_coherent_kern_range(addr, addr + len);
99 }
100 return;
101 }
102
103 if (cache_is_vipt_aliasing()) {
104 flush_pfn_alias(page_to_pfn(page), uaddr);
105 return;
106 }
107
108 /* VIPT non-aliasing cache */
109 if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask) &&
110 vma->vm_flags | VM_EXEC) {
111 unsigned long addr = (unsigned long)kaddr;
112 /* only flushing the kernel mapping on non-aliasing VIPT */
113 __cpuc_coherent_kern_range(addr, addr + len);
114 }
115}
90#else 116#else
91#define flush_pfn_alias(pfn,vaddr) do { } while (0) 117#define flush_pfn_alias(pfn,vaddr) do { } while (0)
92#endif 118#endif