userfaultfd: non-cooperative: add event for memory unmaps

[mirror_ubuntu-jammy-kernel.git] / include / uapi / linux / userfaultfd.h

diff --git a/include/uapi/linux/userfaultfd.h b/include/uapi/linux/userfaultfd.h
index b742c40c2880e4b04105e264ffb10af6ebf87a1f..3b059530dac95fa6e5dcf736e95a84fe80eb5f35 100644 (file)
--- a/include/uapi/linux/userfaultfd.h
+++ b/include/uapi/linux/userfaultfd.h
@@ -21,6 +21,7 @@
 #define UFFD_API_FEATURES (UFFD_FEATURE_EVENT_FORK |           \
                           UFFD_FEATURE_EVENT_REMAP |           \
                           UFFD_FEATURE_EVENT_REMOVE |  \
+                          UFFD_FEATURE_EVENT_UNMAP |           \
                           UFFD_FEATURE_MISSING_HUGETLBFS |     \
                           UFFD_FEATURE_MISSING_SHMEM)
 #define UFFD_API_IOCTLS                                \
@@ -110,6 +111,7 @@ struct uffd_msg {
 #define UFFD_EVENT_FORK                0x13
 #define UFFD_EVENT_REMAP       0x14
 #define UFFD_EVENT_REMOVE      0x15
+#define UFFD_EVENT_UNMAP       0x16
 
 /* flags for UFFD_EVENT_PAGEFAULT */
 #define UFFD_PAGEFAULT_FLAG_WRITE      (1<<0)  /* If this was a write fault */
@@ -158,6 +160,7 @@ struct uffdio_api {
 #define UFFD_FEATURE_EVENT_REMOVE              (1<<3)
 #define UFFD_FEATURE_MISSING_HUGETLBFS         (1<<4)
 #define UFFD_FEATURE_MISSING_SHMEM             (1<<5)
+#define UFFD_FEATURE_EVENT_UNMAP               (1<<6)
        __u64 features;
 
        __u64 ioctls;