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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 b103e56806b..d438ce41cdd 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
if (cache_is_vipt_aliasing())
flush_pfn_alias(pfn, user_addr);
}
+
+void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
+ unsigned long uaddr, void *kaddr,
+ unsigned long len, int write)
+{
+ if (cache_is_vivt()) {
+ if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) {
+ unsigned long addr = (unsigned long)kaddr;
+ __cpuc_coherent_kern_range(addr, addr + len);
+ }
+ return;
+ }
+
+ if (cache_is_vipt_aliasing()) {
+ flush_pfn_alias(page_to_pfn(page), uaddr);
+ return;
+ }
+
+ /* VIPT non-aliasing cache */
+ if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask) &&
+ vma->vm_flags | VM_EXEC) {
+ unsigned long addr = (unsigned long)kaddr;
+ /* only flushing the kernel mapping on non-aliasing VIPT */
+ __cpuc_coherent_kern_range(addr, addr + len);
+ }
+}
#else
#define flush_pfn_alias(pfn,vaddr) do { } while (0)
#endif