Merge tag 'zynqmp-dt-for-v5.8' of https://github.com/Xilinx/linux-xlnx into arm/dt

[linux-2.6-microblaze.git] / include / linux / userfaultfd_k.h

diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h
index ac9d71e..a8e5f3e 100644 (file)
--- a/include/linux/userfaultfd_k.h
+++ b/include/linux/userfaultfd_k.h
@@ -14,6 +14,8 @@
 #include <linux/userfaultfd.h> /* linux/include/uapi/linux/userfaultfd.h */
 
 #include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <asm-generic/pgtable_uffd.h>
 
 /*
  * CAREFUL: Check include/uapi/asm-generic/fcntl.h when defining
@@ -34,11 +36,14 @@ extern vm_fault_t handle_userfault(struct vm_fault *vmf, unsigned long reason);
 
 extern ssize_t mcopy_atomic(struct mm_struct *dst_mm, unsigned long dst_start,
                            unsigned long src_start, unsigned long len,
-                           bool *mmap_changing);
+                           bool *mmap_changing, __u64 mode);
 extern ssize_t mfill_zeropage(struct mm_struct *dst_mm,
                              unsigned long dst_start,
                              unsigned long len,
                              bool *mmap_changing);
+extern int mwriteprotect_range(struct mm_struct *dst_mm,
+                              unsigned long start, unsigned long len,
+                              bool enable_wp, bool *mmap_changing);
 
 /* mm helpers */
 static inline bool is_mergeable_vm_userfaultfd_ctx(struct vm_area_struct *vma,
@@ -52,6 +57,23 @@ static inline bool userfaultfd_missing(struct vm_area_struct *vma)
        return vma->vm_flags & VM_UFFD_MISSING;
 }
 
+static inline bool userfaultfd_wp(struct vm_area_struct *vma)
+{
+       return vma->vm_flags & VM_UFFD_WP;
+}
+
+static inline bool userfaultfd_pte_wp(struct vm_area_struct *vma,
+                                     pte_t pte)
+{
+       return userfaultfd_wp(vma) && pte_uffd_wp(pte);
+}
+
+static inline bool userfaultfd_huge_pmd_wp(struct vm_area_struct *vma,
+                                          pmd_t pmd)
+{
+       return userfaultfd_wp(vma) && pmd_uffd_wp(pmd);
+}
+
 static inline bool userfaultfd_armed(struct vm_area_struct *vma)
 {
        return vma->vm_flags & (VM_UFFD_MISSING | VM_UFFD_WP);
@@ -96,6 +118,24 @@ static inline bool userfaultfd_missing(struct vm_area_struct *vma)
        return false;
 }
 
+static inline bool userfaultfd_wp(struct vm_area_struct *vma)
+{
+       return false;
+}
+
+static inline bool userfaultfd_pte_wp(struct vm_area_struct *vma,
+                                     pte_t pte)
+{
+       return false;
+}
+
+static inline bool userfaultfd_huge_pmd_wp(struct vm_area_struct *vma,
+                                          pmd_t pmd)
+{
+       return false;
+}
+
+
 static inline bool userfaultfd_armed(struct vm_area_struct *vma)
 {
        return false;