diff options
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/userfaultfd.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/uapi/linux/userfaultfd.h b/include/uapi/linux/userfaultfd.h index 2841e4ea8f2c..7b78aa3b5318 100644 --- a/include/uapi/linux/userfaultfd.h +++ b/include/uapi/linux/userfaultfd.h @@ -79,6 +79,7 @@ #define _UFFDIO_WRITEPROTECT (0x06) #define _UFFDIO_CONTINUE (0x07) #define _UFFDIO_POISON (0x08) +#define _UFFDIO_RWPROTECT (0x09) #define _UFFDIO_API (0x3F) /* userfaultfd ioctl ids */ @@ -103,6 +104,8 @@ struct uffdio_continue) #define UFFDIO_POISON _IOWR(UFFDIO, _UFFDIO_POISON, \ struct uffdio_poison) +#define UFFDIO_RWPROTECT _IOWR(UFFDIO, _UFFDIO_RWPROTECT, \ + struct uffdio_rwprotect) /* read() structure */ struct uffd_msg { @@ -158,6 +161,7 @@ struct uffd_msg { #define UFFD_PAGEFAULT_FLAG_WRITE (1<<0) /* If this was a write fault */ #define UFFD_PAGEFAULT_FLAG_WP (1<<1) /* If reason is VM_UFFD_WP */ #define UFFD_PAGEFAULT_FLAG_MINOR (1<<2) /* If reason is VM_UFFD_MINOR */ +#define UFFD_PAGEFAULT_FLAG_RWP (1<<3) /* If reason is VM_UFFD_RWP */ struct uffdio_api { /* userland asks for an API number and the features to enable */ @@ -230,6 +234,11 @@ struct uffdio_api { * * UFFD_FEATURE_MOVE indicates that the kernel supports moving an * existing page contents from userspace. + * + * UFFD_FEATURE_RWP indicates that the kernel supports + * UFFDIO_REGISTER_MODE_RWP for read-write protection tracking. + * Pages are made inaccessible via UFFDIO_RWPROTECT and faults + * are delivered when the pages are re-accessed. */ #define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1<<0) #define UFFD_FEATURE_EVENT_FORK (1<<1) @@ -248,6 +257,7 @@ struct uffdio_api { #define UFFD_FEATURE_POISON (1<<14) #define UFFD_FEATURE_WP_ASYNC (1<<15) #define UFFD_FEATURE_MOVE (1<<16) +#define UFFD_FEATURE_RWP (1<<17) __u64 features; __u64 ioctls; @@ -263,6 +273,7 @@ struct uffdio_register { #define UFFDIO_REGISTER_MODE_MISSING ((__u64)1<<0) #define UFFDIO_REGISTER_MODE_WP ((__u64)1<<1) #define UFFDIO_REGISTER_MODE_MINOR ((__u64)1<<2) +#define UFFDIO_REGISTER_MODE_RWP ((__u64)1<<3) __u64 mode; /* @@ -356,6 +367,14 @@ struct uffdio_poison { __s64 updated; }; +struct uffdio_rwprotect { + struct uffdio_range range; + /* !RWP means undo RWP-protection */ +#define UFFDIO_RWPROTECT_MODE_RWP ((__u64)1<<0) +#define UFFDIO_RWPROTECT_MODE_DONTWAKE ((__u64)1<<1) + __u64 mode; +}; + struct uffdio_move { __u64 dst; __u64 src; |