diff options
| -rw-r--r-- | include/uapi/linux/userfaultfd.h | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/include/uapi/linux/userfaultfd.h b/include/uapi/linux/userfaultfd.h index a5f8825381ef..df0e09bb7dd5 100644 --- a/include/uapi/linux/userfaultfd.h +++ b/include/uapi/linux/userfaultfd.h @@ -25,7 +25,9 @@ (__u64)1 << _UFFDIO_UNREGISTER | \ (__u64)1 << _UFFDIO_API) #define UFFD_API_RANGE_IOCTLS \ - ((__u64)1 << _UFFDIO_WAKE) + ((__u64)1 << _UFFDIO_WAKE | \ + (__u64)1 << _UFFDIO_COPY | \ + (__u64)1 << _UFFDIO_ZEROPAGE) /* * Valid ioctl command number range with this API is from 0x00 to @@ -38,6 +40,8 @@ #define _UFFDIO_REGISTER (0x00) #define _UFFDIO_UNREGISTER (0x01) #define _UFFDIO_WAKE (0x02) +#define _UFFDIO_COPY (0x03) +#define _UFFDIO_ZEROPAGE (0x04) #define _UFFDIO_API (0x3F) /* userfaultfd ioctl ids */ @@ -50,6 +54,10 @@ struct uffdio_range) #define UFFDIO_WAKE _IOR(UFFDIO, _UFFDIO_WAKE, \ struct uffdio_range) +#define UFFDIO_COPY _IOWR(UFFDIO, _UFFDIO_COPY, \ + struct uffdio_copy) +#define UFFDIO_ZEROPAGE _IOWR(UFFDIO, _UFFDIO_ZEROPAGE, \ + struct uffdio_zeropage) /* read() structure */ struct uffd_msg { @@ -126,4 +134,36 @@ struct uffdio_register { __u64 ioctls; }; +struct uffdio_copy { + __u64 dst; + __u64 src; + __u64 len; + /* + * There will be a wrprotection flag later that allows to map + * pages wrprotected on the fly. And such a flag will be + * available if the wrprotection ioctl are implemented for the + * range according to the uffdio_register.ioctls. + */ +#define UFFDIO_COPY_MODE_DONTWAKE ((__u64)1<<0) + __u64 mode; + + /* + * "copy" is written by the ioctl and must be at the end: the + * copy_from_user will not read the last 8 bytes. + */ + __s64 copy; +}; + +struct uffdio_zeropage { + struct uffdio_range range; +#define UFFDIO_ZEROPAGE_MODE_DONTWAKE ((__u64)1<<0) + __u64 mode; + + /* + * "zeropage" is written by the ioctl and must be at the end: + * the copy_from_user will not read the last 8 bytes. + */ + __s64 zeropage; +}; + #endif /* _LINUX_USERFAULTFD_H */ |