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-rw-r--r--arch/arm/mm/flush.c33
1 files changed, 28 insertions, 5 deletions
diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c
index 3387e60e4ea..43d54f5b26b 100644
--- a/arch/arm/mm/flush.c
+++ b/arch/arm/mm/flush.c
@@ -104,17 +104,20 @@ void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsig
#define flush_icache_alias(pfn,vaddr,len) do { } while (0)
#endif
+#define FLAG_PA_IS_EXEC 1
+#define FLAG_PA_CORE_IN_MM 2
+
static void flush_ptrace_access_other(void *args)
{
__flush_icache_all();
}
-static
-void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
- unsigned long uaddr, void *kaddr, unsigned long len)
+static inline
+void __flush_ptrace_access(struct page *page, unsigned long uaddr, void *kaddr,
+ unsigned long len, unsigned int flags)
{
if (cache_is_vivt()) {
- if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm))) {
+ if (flags & FLAG_PA_CORE_IN_MM) {
unsigned long addr = (unsigned long)kaddr;
__cpuc_coherent_kern_range(addr, addr + len);
}
@@ -128,7 +131,7 @@ void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
}
/* VIPT non-aliasing D-cache */
- if (vma->vm_flags & VM_EXEC) {
+ if (flags & FLAG_PA_IS_EXEC) {
unsigned long addr = (unsigned long)kaddr;
if (icache_is_vipt_aliasing())
flush_icache_alias(page_to_pfn(page), uaddr, len);
@@ -140,6 +143,26 @@ void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
}
}
+static
+void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
+ unsigned long uaddr, void *kaddr, unsigned long len)
+{
+ unsigned int flags = 0;
+ if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm)))
+ flags |= FLAG_PA_CORE_IN_MM;
+ if (vma->vm_flags & VM_EXEC)
+ flags |= FLAG_PA_IS_EXEC;
+ __flush_ptrace_access(page, uaddr, kaddr, len, flags);
+}
+
+void flush_uprobe_xol_access(struct page *page, unsigned long uaddr,
+ void *kaddr, unsigned long len)
+{
+ unsigned int flags = FLAG_PA_CORE_IN_MM|FLAG_PA_IS_EXEC;
+
+ __flush_ptrace_access(page, uaddr, kaddr, len, flags);
+}
+
/*
* Copy user data from/to a page which is mapped into a different
* processes address space. Really, we want to allow our "user