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      1 /****************************************************************************
      2  ****************************************************************************
      3  ***
      4  ***   This header was automatically generated from a Linux kernel header
      5  ***   of the same name, to make information necessary for userspace to
      6  ***   call into the kernel available to libc.  It contains only constants,
      7  ***   structures, and macros generated from the original header, and thus,
      8  ***   contains no copyrightable information.
      9  ***
     10  ***   To edit the content of this header, modify the corresponding
     11  ***   source file (e.g. under external/kernel-headers/original/) then
     12  ***   run bionic/libc/kernel/tools/update_all.py
     13  ***
     14  ***   Any manual change here will be lost the next time this script will
     15  ***   be run. You've been warned!
     16  ***
     17  ****************************************************************************
     18  ****************************************************************************/
     19 #ifndef _LINUX_USERFAULTFD_H
     20 #define _LINUX_USERFAULTFD_H
     21 #include <linux/types.h>
     22 #define UFFD_API ((__u64) 0xAA)
     23 #define UFFD_API_FEATURES (0)
     24 #define UFFD_API_IOCTLS ((__u64) 1 << _UFFDIO_REGISTER | (__u64) 1 << _UFFDIO_UNREGISTER | (__u64) 1 << _UFFDIO_API)
     25 #define UFFD_API_RANGE_IOCTLS ((__u64) 1 << _UFFDIO_WAKE | (__u64) 1 << _UFFDIO_COPY | (__u64) 1 << _UFFDIO_ZEROPAGE)
     26 #define _UFFDIO_REGISTER (0x00)
     27 #define _UFFDIO_UNREGISTER (0x01)
     28 #define _UFFDIO_WAKE (0x02)
     29 #define _UFFDIO_COPY (0x03)
     30 #define _UFFDIO_ZEROPAGE (0x04)
     31 #define _UFFDIO_API (0x3F)
     32 #define UFFDIO 0xAA
     33 #define UFFDIO_API _IOWR(UFFDIO, _UFFDIO_API, struct uffdio_api)
     34 #define UFFDIO_REGISTER _IOWR(UFFDIO, _UFFDIO_REGISTER, struct uffdio_register)
     35 #define UFFDIO_UNREGISTER _IOR(UFFDIO, _UFFDIO_UNREGISTER, struct uffdio_range)
     36 #define UFFDIO_WAKE _IOR(UFFDIO, _UFFDIO_WAKE, struct uffdio_range)
     37 #define UFFDIO_COPY _IOWR(UFFDIO, _UFFDIO_COPY, struct uffdio_copy)
     38 #define UFFDIO_ZEROPAGE _IOWR(UFFDIO, _UFFDIO_ZEROPAGE, struct uffdio_zeropage)
     39 struct uffd_msg {
     40   __u8 event;
     41   __u8 reserved1;
     42   __u16 reserved2;
     43   __u32 reserved3;
     44   union {
     45     struct {
     46       __u64 flags;
     47       __u64 address;
     48     } pagefault;
     49     struct {
     50       __u64 reserved1;
     51       __u64 reserved2;
     52       __u64 reserved3;
     53     } reserved;
     54   } arg;
     55 } __packed;
     56 #define UFFD_EVENT_PAGEFAULT 0x12
     57 #define UFFD_PAGEFAULT_FLAG_WRITE (1 << 0)
     58 #define UFFD_PAGEFAULT_FLAG_WP (1 << 1)
     59 struct uffdio_api {
     60   __u64 api;
     61   __u64 features;
     62   __u64 ioctls;
     63 };
     64 struct uffdio_range {
     65   __u64 start;
     66   __u64 len;
     67 };
     68 struct uffdio_register {
     69   struct uffdio_range range;
     70 #define UFFDIO_REGISTER_MODE_MISSING ((__u64) 1 << 0)
     71 #define UFFDIO_REGISTER_MODE_WP ((__u64) 1 << 1)
     72   __u64 mode;
     73   __u64 ioctls;
     74 };
     75 struct uffdio_copy {
     76   __u64 dst;
     77   __u64 src;
     78   __u64 len;
     79 #define UFFDIO_COPY_MODE_DONTWAKE ((__u64) 1 << 0)
     80   __u64 mode;
     81   __s64 copy;
     82 };
     83 struct uffdio_zeropage {
     84   struct uffdio_range range;
     85 #define UFFDIO_ZEROPAGE_MODE_DONTWAKE ((__u64) 1 << 0)
     86   __u64 mode;
     87   __s64 zeropage;
     88 };
     89 #endif
     90