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authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-07 06:49:49 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-07 06:49:49 +0300
commitd34fc1adf01ff87026da85fb972dc259dc347540 (patch)
tree27356073d423187157b7cdb69da32b53102fb9e7 /include/uapi/linux
parent1c9fe4409ce3e9c78b1ed96ee8ed699d4f03bf33 (diff)
parentd2cd9ede6e193dd7d88b6d27399e96229a551b19 (diff)
downloadlinux-d34fc1adf01ff87026da85fb972dc259dc347540.tar.xz
Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton: - various misc bits - DAX updates - OCFS2 - most of MM * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (119 commits) mm,fork: introduce MADV_WIPEONFORK x86,mpx: make mpx depend on x86-64 to free up VMA flag mm: add /proc/pid/smaps_rollup mm: hugetlb: clear target sub-page last when clearing huge page mm: oom: let oom_reap_task and exit_mmap run concurrently swap: choose swap device according to numa node mm: replace TIF_MEMDIE checks by tsk_is_oom_victim mm, oom: do not rely on TIF_MEMDIE for memory reserves access z3fold: use per-cpu unbuddied lists mm, swap: don't use VMA based swap readahead if HDD is used as swap mm, swap: add sysfs interface for VMA based swap readahead mm, swap: VMA based swap readahead mm, swap: fix swap readahead marking mm, swap: add swap readahead hit statistics mm/vmalloc.c: don't reinvent the wheel but use existing llist API mm/vmstat.c: fix wrong comment selftests/memfd: add memfd_create hugetlbfs selftest mm/shmem: add hugetlbfs support to memfd_create() mm, devm_memremap_pages: use multi-order radix for ZONE_DEVICE lookups mm/vmalloc.c: halve the number of comparisons performed in pcpu_get_vm_areas() ...
Diffstat (limited to 'include/uapi/linux')
-rw-r--r--include/uapi/linux/memfd.h24
-rw-r--r--include/uapi/linux/mman.h22
-rw-r--r--include/uapi/linux/shm.h31
-rw-r--r--include/uapi/linux/userfaultfd.h16
4 files changed, 90 insertions, 3 deletions
diff --git a/include/uapi/linux/memfd.h b/include/uapi/linux/memfd.h
index 534e364bda92..7f3a722dbd72 100644
--- a/include/uapi/linux/memfd.h
+++ b/include/uapi/linux/memfd.h
@@ -1,8 +1,32 @@
#ifndef _UAPI_LINUX_MEMFD_H
#define _UAPI_LINUX_MEMFD_H
+#include <asm-generic/hugetlb_encode.h>
+
/* flags for memfd_create(2) (unsigned int) */
#define MFD_CLOEXEC 0x0001U
#define MFD_ALLOW_SEALING 0x0002U
+#define MFD_HUGETLB 0x0004U
+
+/*
+ * Huge page size encoding when MFD_HUGETLB is specified, and a huge page
+ * size other than the default is desired. See hugetlb_encode.h.
+ * All known huge page size encodings are provided here. It is the
+ * responsibility of the application to know which sizes are supported on
+ * the running system. See mmap(2) man page for details.
+ */
+#define MFD_HUGE_SHIFT HUGETLB_FLAG_ENCODE_SHIFT
+#define MFD_HUGE_MASK HUGETLB_FLAG_ENCODE_MASK
+
+#define MFD_HUGE_64KB HUGETLB_FLAG_ENCODE_64KB
+#define MFD_HUGE_512KB HUGETLB_FLAG_ENCODE_512KB
+#define MFD_HUGE_1MB HUGETLB_FLAG_ENCODE_1MB
+#define MFD_HUGE_2MB HUGETLB_FLAG_ENCODE_2MB
+#define MFD_HUGE_8MB HUGETLB_FLAG_ENCODE_8MB
+#define MFD_HUGE_16MB HUGETLB_FLAG_ENCODE_16MB
+#define MFD_HUGE_256MB HUGETLB_FLAG_ENCODE_256MB
+#define MFD_HUGE_1GB HUGETLB_FLAG_ENCODE_1GB
+#define MFD_HUGE_2GB HUGETLB_FLAG_ENCODE_2GB
+#define MFD_HUGE_16GB HUGETLB_FLAG_ENCODE_16GB
#endif /* _UAPI_LINUX_MEMFD_H */
diff --git a/include/uapi/linux/mman.h b/include/uapi/linux/mman.h
index ade4acd3a90c..a937480d7cd3 100644
--- a/include/uapi/linux/mman.h
+++ b/include/uapi/linux/mman.h
@@ -2,6 +2,7 @@
#define _UAPI_LINUX_MMAN_H
#include <asm/mman.h>
+#include <asm-generic/hugetlb_encode.h>
#define MREMAP_MAYMOVE 1
#define MREMAP_FIXED 2
@@ -10,4 +11,25 @@
#define OVERCOMMIT_ALWAYS 1
#define OVERCOMMIT_NEVER 2
+/*
+ * Huge page size encoding when MAP_HUGETLB is specified, and a huge page
+ * size other than the default is desired. See hugetlb_encode.h.
+ * All known huge page size encodings are provided here. It is the
+ * responsibility of the application to know which sizes are supported on
+ * the running system. See mmap(2) man page for details.
+ */
+#define MAP_HUGE_SHIFT HUGETLB_FLAG_ENCODE_SHIFT
+#define MAP_HUGE_MASK HUGETLB_FLAG_ENCODE_MASK
+
+#define MAP_HUGE_64KB HUGETLB_FLAG_ENCODE_64KB
+#define MAP_HUGE_512KB HUGETLB_FLAG_ENCODE_512KB
+#define MAP_HUGE_1MB HUGETLB_FLAG_ENCODE_1MB
+#define MAP_HUGE_2MB HUGETLB_FLAG_ENCODE_2MB
+#define MAP_HUGE_8MB HUGETLB_FLAG_ENCODE_8MB
+#define MAP_HUGE_16MB HUGETLB_FLAG_ENCODE_16MB
+#define MAP_HUGE_256MB HUGETLB_FLAG_ENCODE_256MB
+#define MAP_HUGE_1GB HUGETLB_FLAG_ENCODE_1GB
+#define MAP_HUGE_2GB HUGETLB_FLAG_ENCODE_2GB
+#define MAP_HUGE_16GB HUGETLB_FLAG_ENCODE_16GB
+
#endif /* _UAPI_LINUX_MMAN_H */
diff --git a/include/uapi/linux/shm.h b/include/uapi/linux/shm.h
index 1fbf24ea37fd..cf23c873719d 100644
--- a/include/uapi/linux/shm.h
+++ b/include/uapi/linux/shm.h
@@ -3,6 +3,7 @@
#include <linux/ipc.h>
#include <linux/errno.h>
+#include <asm-generic/hugetlb_encode.h>
#ifndef __KERNEL__
#include <unistd.h>
#endif
@@ -40,11 +41,37 @@ struct shmid_ds {
/* Include the definition of shmid64_ds and shminfo64 */
#include <asm/shmbuf.h>
-/* permission flag for shmget */
+/*
+ * shmget() shmflg values.
+ */
+/* The bottom nine bits are the same as open(2) mode flags */
#define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */
#define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */
+/* Bits 9 & 10 are IPC_CREAT and IPC_EXCL */
+#define SHM_HUGETLB 04000 /* segment will use huge TLB pages */
+#define SHM_NORESERVE 010000 /* don't check for reservations */
+
+/*
+ * Huge page size encoding when SHM_HUGETLB is specified, and a huge page
+ * size other than the default is desired. See hugetlb_encode.h
+ */
+#define SHM_HUGE_SHIFT HUGETLB_FLAG_ENCODE_SHIFT
+#define SHM_HUGE_MASK HUGETLB_FLAG_ENCODE_MASK
+
+#define SHM_HUGE_64KB HUGETLB_FLAG_ENCODE_64KB
+#define SHM_HUGE_512KB HUGETLB_FLAG_ENCODE_512KB
+#define SHM_HUGE_1MB HUGETLB_FLAG_ENCODE_1MB
+#define SHM_HUGE_2MB HUGETLB_FLAG_ENCODE_2MB
+#define SHM_HUGE_8MB HUGETLB_FLAG_ENCODE_8MB
+#define SHM_HUGE_16MB HUGETLB_FLAG_ENCODE_16MB
+#define SHM_HUGE_256MB HUGETLB_FLAG_ENCODE_256MB
+#define SHM_HUGE_1GB HUGETLB_FLAG_ENCODE_1GB
+#define SHM_HUGE_2GB HUGETLB_FLAG_ENCODE_2GB
+#define SHM_HUGE_16GB HUGETLB_FLAG_ENCODE_16GB
-/* mode for attach */
+/*
+ * shmat() shmflg values
+ */
#define SHM_RDONLY 010000 /* read-only access */
#define SHM_RND 020000 /* round attach address to SHMLBA boundary */
#define SHM_REMAP 040000 /* take-over region on attach */
diff --git a/include/uapi/linux/userfaultfd.h b/include/uapi/linux/userfaultfd.h
index 3b059530dac9..d6d1f65cb3c3 100644
--- a/include/uapi/linux/userfaultfd.h
+++ b/include/uapi/linux/userfaultfd.h
@@ -23,7 +23,9 @@
UFFD_FEATURE_EVENT_REMOVE | \
UFFD_FEATURE_EVENT_UNMAP | \
UFFD_FEATURE_MISSING_HUGETLBFS | \
- UFFD_FEATURE_MISSING_SHMEM)
+ UFFD_FEATURE_MISSING_SHMEM | \
+ UFFD_FEATURE_SIGBUS | \
+ UFFD_FEATURE_THREAD_ID)
#define UFFD_API_IOCTLS \
((__u64)1 << _UFFDIO_REGISTER | \
(__u64)1 << _UFFDIO_UNREGISTER | \
@@ -78,6 +80,9 @@ struct uffd_msg {
struct {
__u64 flags;
__u64 address;
+ union {
+ __u32 ptid;
+ } feat;
} pagefault;
struct {
@@ -153,6 +158,13 @@ struct uffdio_api {
* UFFD_FEATURE_MISSING_SHMEM works the same as
* UFFD_FEATURE_MISSING_HUGETLBFS, but it applies to shmem
* (i.e. tmpfs and other shmem based APIs).
+ *
+ * UFFD_FEATURE_SIGBUS feature means no page-fault
+ * (UFFD_EVENT_PAGEFAULT) event will be delivered, instead
+ * a SIGBUS signal will be sent to the faulting process.
+ *
+ * UFFD_FEATURE_THREAD_ID pid of the page faulted task_struct will
+ * be returned, if feature is not requested 0 will be returned.
*/
#define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1<<0)
#define UFFD_FEATURE_EVENT_FORK (1<<1)
@@ -161,6 +173,8 @@ struct uffdio_api {
#define UFFD_FEATURE_MISSING_HUGETLBFS (1<<4)
#define UFFD_FEATURE_MISSING_SHMEM (1<<5)
#define UFFD_FEATURE_EVENT_UNMAP (1<<6)
+#define UFFD_FEATURE_SIGBUS (1<<7)
+#define UFFD_FEATURE_THREAD_ID (1<<8)
__u64 features;
__u64 ioctls;