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authorLinus Torvalds <torvalds@linux-foundation.org>2020-04-08 00:11:54 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-04-08 00:11:54 +0300
commit63bef48fd6c9d3f1ba4f0e23b4da1e007db6a3c0 (patch)
treef27c1ea7686b2ee30eea6b973a430f1c102bb03f /include
parent04de788e61a576820baf03ff8accc246ca146cb3 (diff)
parent1cd377baa91844b9f87a2b72eabf7ff783946b5e (diff)
downloadlinux-63bef48fd6c9d3f1ba4f0e23b4da1e007db6a3c0.tar.xz
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton: - a lot more of MM, quite a bit more yet to come: (memcg, pagemap, vmalloc, pagealloc, migration, thp, ksm, madvise, virtio, userfaultfd, memory-hotplug, shmem, rmap, zswap, zsmalloc, cleanups) - various other subsystems (procfs, misc, MAINTAINERS, bitops, lib, checkpatch, epoll, binfmt, kallsyms, reiserfs, kmod, gcov, kconfig, ubsan, fault-injection, ipc) * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (158 commits) ipc/shm.c: make compat_ksys_shmctl() static ipc/mqueue.c: fix a brace coding style issue lib/Kconfig.debug: fix a typo "capabilitiy" -> "capability" ubsan: include bug type in report header kasan: unset panic_on_warn before calling panic() ubsan: check panic_on_warn drivers/misc/lkdtm/bugs.c: add arithmetic overflow and array bounds checks ubsan: split "bounds" checker from other options ubsan: add trap instrumentation option init/Kconfig: clean up ANON_INODES and old IO schedulers options kernel/gcov/fs.c: replace zero-length array with flexible-array member gcov: gcc_3_4: replace zero-length array with flexible-array member gcov: gcc_4_7: replace zero-length array with flexible-array member kernel/kmod.c: fix a typo "assuems" -> "assumes" reiserfs: clean up several indentation issues kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol() samples/hw_breakpoint: drop use of kallsyms_lookup_name() samples/hw_breakpoint: drop HW_BREAKPOINT_R when reporting writes fs/binfmt_elf.c: don't free interpreter's ELF pheaders on common path fs/binfmt_elf.c: allocate less for static executable ...
Diffstat (limited to 'include')
-rw-r--r--include/asm-generic/pgtable.h1
-rw-r--r--include/asm-generic/pgtable_uffd.h66
-rw-r--r--include/asm-generic/tlb.h3
-rw-r--r--include/linux/bitops.h4
-rw-r--r--include/linux/bits.h22
-rw-r--r--include/linux/compiler.h2
-rw-r--r--include/linux/compiler_types.h11
-rw-r--r--include/linux/gfp.h2
-rw-r--r--include/linux/huge_mm.h2
-rw-r--r--include/linux/memory.h1
-rw-r--r--include/linux/memory_hotplug.h13
-rw-r--r--include/linux/memremap.h2
-rw-r--r--include/linux/mm.h25
-rw-r--r--include/linux/mm_inline.h15
-rw-r--r--include/linux/mm_types.h4
-rw-r--r--include/linux/mmzone.h47
-rw-r--r--include/linux/page-flags.h16
-rw-r--r--include/linux/page_reporting.h26
-rw-r--r--include/linux/pagemap.h4
-rw-r--r--include/linux/percpu_counter.h4
-rw-r--r--include/linux/proc_fs.h17
-rw-r--r--include/linux/seq_file.h1
-rw-r--r--include/linux/shmem_fs.h10
-rw-r--r--include/linux/stackdepot.h2
-rw-r--r--include/linux/swapops.h5
-rw-r--r--include/linux/userfaultfd_k.h42
-rw-r--r--include/linux/vm_event_item.h5
-rw-r--r--include/trace/events/huge_memory.h1
-rw-r--r--include/trace/events/mmflags.h1
-rw-r--r--include/trace/events/vmscan.h2
-rw-r--r--include/uapi/linux/userfaultfd.h40
-rw-r--r--include/uapi/linux/virtio_balloon.h1
32 files changed, 293 insertions, 104 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index e2e2bef07dd2..329b8c8ca703 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -10,6 +10,7 @@
#include <linux/mm_types.h>
#include <linux/bug.h>
#include <linux/errno.h>
+#include <asm-generic/pgtable_uffd.h>
#if 5 - defined(__PAGETABLE_P4D_FOLDED) - defined(__PAGETABLE_PUD_FOLDED) - \
defined(__PAGETABLE_PMD_FOLDED) != CONFIG_PGTABLE_LEVELS
diff --git a/include/asm-generic/pgtable_uffd.h b/include/asm-generic/pgtable_uffd.h
new file mode 100644
index 000000000000..828966d4c281
--- /dev/null
+++ b/include/asm-generic/pgtable_uffd.h
@@ -0,0 +1,66 @@
+#ifndef _ASM_GENERIC_PGTABLE_UFFD_H
+#define _ASM_GENERIC_PGTABLE_UFFD_H
+
+#ifndef CONFIG_HAVE_ARCH_USERFAULTFD_WP
+static __always_inline int pte_uffd_wp(pte_t pte)
+{
+ return 0;
+}
+
+static __always_inline int pmd_uffd_wp(pmd_t pmd)
+{
+ return 0;
+}
+
+static __always_inline pte_t pte_mkuffd_wp(pte_t pte)
+{
+ return pte;
+}
+
+static __always_inline pmd_t pmd_mkuffd_wp(pmd_t pmd)
+{
+ return pmd;
+}
+
+static __always_inline pte_t pte_clear_uffd_wp(pte_t pte)
+{
+ return pte;
+}
+
+static __always_inline pmd_t pmd_clear_uffd_wp(pmd_t pmd)
+{
+ return pmd;
+}
+
+static __always_inline pte_t pte_swp_mkuffd_wp(pte_t pte)
+{
+ return pte;
+}
+
+static __always_inline int pte_swp_uffd_wp(pte_t pte)
+{
+ return 0;
+}
+
+static __always_inline pte_t pte_swp_clear_uffd_wp(pte_t pte)
+{
+ return pte;
+}
+
+static inline pmd_t pmd_swp_mkuffd_wp(pmd_t pmd)
+{
+ return pmd;
+}
+
+static inline int pmd_swp_uffd_wp(pmd_t pmd)
+{
+ return 0;
+}
+
+static inline pmd_t pmd_swp_clear_uffd_wp(pmd_t pmd)
+{
+ return pmd;
+}
+#endif /* CONFIG_HAVE_ARCH_USERFAULTFD_WP */
+
+#endif /* _ASM_GENERIC_PGTABLE_UFFD_H */
diff --git a/include/asm-generic/tlb.h b/include/asm-generic/tlb.h
index f391f6b500b4..3f1649a8cf55 100644
--- a/include/asm-generic/tlb.h
+++ b/include/asm-generic/tlb.h
@@ -13,6 +13,7 @@
#include <linux/mmu_notifier.h>
#include <linux/swap.h>
+#include <linux/hugetlb_inline.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>
@@ -398,7 +399,7 @@ tlb_update_vma_flags(struct mmu_gather *tlb, struct vm_area_struct *vma)
* We rely on tlb_end_vma() to issue a flush, such that when we reset
* these values the batch is empty.
*/
- tlb->vma_huge = !!(vma->vm_flags & VM_HUGETLB);
+ tlb->vma_huge = is_vm_hugetlb_page(vma);
tlb->vma_exec = !!(vma->vm_flags & VM_EXEC);
}
diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index 47f54b459c26..9acf654f0b19 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -162,7 +162,7 @@ static inline __u8 ror8(__u8 word, unsigned int shift)
*
* This is safe to use for 16- and 8-bit types as well.
*/
-static inline __s32 sign_extend32(__u32 value, int index)
+static __always_inline __s32 sign_extend32(__u32 value, int index)
{
__u8 shift = 31 - index;
return (__s32)(value << shift) >> shift;
@@ -173,7 +173,7 @@ static inline __s32 sign_extend32(__u32 value, int index)
* @value: value to sign extend
* @index: 0 based bit index (0<=index<64) to sign bit
*/
-static inline __s64 sign_extend64(__u64 value, int index)
+static __always_inline __s64 sign_extend64(__u64 value, int index)
{
__u8 shift = 63 - index;
return (__s64)(value << shift) >> shift;
diff --git a/include/linux/bits.h b/include/linux/bits.h
index a740bbcf3cd2..4671fbf28842 100644
--- a/include/linux/bits.h
+++ b/include/linux/bits.h
@@ -18,12 +18,30 @@
* position @h. For example
* GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000.
*/
-#define GENMASK(h, l) \
+#if !defined(__ASSEMBLY__) && \
+ (!defined(CONFIG_CC_IS_GCC) || CONFIG_GCC_VERSION >= 49000)
+#include <linux/build_bug.h>
+#define GENMASK_INPUT_CHECK(h, l) \
+ (BUILD_BUG_ON_ZERO(__builtin_choose_expr( \
+ __builtin_constant_p((l) > (h)), (l) > (h), 0)))
+#else
+/*
+ * BUILD_BUG_ON_ZERO is not available in h files included from asm files,
+ * disable the input check if that is the case.
+ */
+#define GENMASK_INPUT_CHECK(h, l) 0
+#endif
+
+#define __GENMASK(h, l) \
(((~UL(0)) - (UL(1) << (l)) + 1) & \
(~UL(0) >> (BITS_PER_LONG - 1 - (h))))
+#define GENMASK(h, l) \
+ (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
-#define GENMASK_ULL(h, l) \
+#define __GENMASK_ULL(h, l) \
(((~ULL(0)) - (ULL(1) << (l)) + 1) & \
(~ULL(0) >> (BITS_PER_LONG_LONG - 1 - (h))))
+#define GENMASK_ULL(h, l) \
+ (GENMASK_INPUT_CHECK(h, l) + __GENMASK_ULL(h, l))
#endif /* __LINUX_BITS_H */
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 5e88e7e33abe..034b0a644efc 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -347,7 +347,7 @@ static inline void *offset_to_ptr(const int *off)
* compiler has support to do so.
*/
#define compiletime_assert(condition, msg) \
- _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
+ _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
#define compiletime_assert_atomic_type(t) \
compiletime_assert(__native_word(t), \
diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h
index 72393a8c1a6c..e970f97a7fcb 100644
--- a/include/linux/compiler_types.h
+++ b/include/linux/compiler_types.h
@@ -129,22 +129,13 @@ struct ftrace_likely_data {
#define __compiler_offsetof(a, b) __builtin_offsetof(a, b)
/*
- * Force always-inline if the user requests it so via the .config.
* Prefer gnu_inline, so that extern inline functions do not emit an
* externally visible function. This makes extern inline behave as per gnu89
* semantics rather than c99. This prevents multiple symbol definition errors
* of extern inline functions at link time.
* A lot of inline functions can cause havoc with function tracing.
- * Do not use __always_inline here, since currently it expands to inline again
- * (which would break users of __always_inline).
*/
-#if !defined(CONFIG_OPTIMIZE_INLINING)
-#define inline inline __attribute__((__always_inline__)) __gnu_inline \
- __inline_maybe_unused notrace
-#else
-#define inline inline __gnu_inline \
- __inline_maybe_unused notrace
-#endif
+#define inline inline __gnu_inline __inline_maybe_unused notrace
/*
* gcc provides both __inline__ and __inline as alternate spellings of
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index be2754841369..4aba4c86c626 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -124,6 +124,8 @@ struct vm_area_struct;
*
* Reclaim modifiers
* ~~~~~~~~~~~~~~~~~
+ * Please note that all the following flags are only applicable to sleepable
+ * allocations (e.g. %GFP_NOWAIT and %GFP_ATOMIC will ignore them).
*
* %__GFP_IO can start physical IO.
*
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index f2df2247026a..cfbb0a87c5f0 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -46,7 +46,7 @@ extern bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr,
pmd_t *old_pmd, pmd_t *new_pmd);
extern int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
unsigned long addr, pgprot_t newprot,
- int prot_numa);
+ unsigned long cp_flags);
vm_fault_t vmf_insert_pfn_pmd_prot(struct vm_fault *vmf, pfn_t pfn,
pgprot_t pgprot, bool write);
diff --git a/include/linux/memory.h b/include/linux/memory.h
index 0b8d791b6669..439a89e758d8 100644
--- a/include/linux/memory.h
+++ b/include/linux/memory.h
@@ -26,7 +26,6 @@
struct memory_block {
unsigned long start_section_nr;
unsigned long state; /* serialized by the dev->lock */
- int section_count; /* serialized by mem_sysfs_mutex */
int online_type; /* for passing data to online routine */
int phys_device; /* to which fru does this belong? */
struct device dev;
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index f4d59155f3d4..ef55115320fb 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -47,9 +47,13 @@ enum {
/* Types for control the zone type of onlined and offlined memory */
enum {
- MMOP_OFFLINE = -1,
- MMOP_ONLINE_KEEP,
+ /* Offline the memory. */
+ MMOP_OFFLINE = 0,
+ /* Online the memory. Zone depends, see default_zone_for_pfn(). */
+ MMOP_ONLINE,
+ /* Online the memory to ZONE_NORMAL. */
MMOP_ONLINE_KERNEL,
+ /* Online the memory to ZONE_MOVABLE. */
MMOP_ONLINE_MOVABLE,
};
@@ -113,7 +117,10 @@ extern int arch_add_memory(int nid, u64 start, u64 size,
struct mhp_restrictions *restrictions);
extern u64 max_mem_size;
-extern bool memhp_auto_online;
+extern int memhp_online_type_from_str(const char *str);
+
+/* Default online_type (MMOP_*) when new memory blocks are added. */
+extern int memhp_default_online_type;
/* If movable_node boot option specified */
extern bool movable_node_enabled;
static inline bool movable_node_is_enabled(void)
diff --git a/include/linux/memremap.h b/include/linux/memremap.h
index 60d97e8fd3c0..8b37c4c9222c 100644
--- a/include/linux/memremap.h
+++ b/include/linux/memremap.h
@@ -98,8 +98,6 @@ struct dev_pagemap_ops {
* @ref: reference count that pins the devm_memremap_pages() mapping
* @internal_ref: internal reference if @ref is not provided by the caller
* @done: completion for @internal_ref
- * @dev: host device of the mapping for debug
- * @data: private data pointer for page_free()
* @type: memory type: see MEMORY_* in memory_hotplug.h
* @flags: PGMAP_* flags to specify defailed behavior
* @ops: method table
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7dd5c4ccbf85..e2f938c5a9d8 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -629,6 +629,12 @@ static inline bool vma_is_foreign(struct vm_area_struct *vma)
return false;
}
+
+static inline bool vma_is_accessible(struct vm_area_struct *vma)
+{
+ return vma->vm_flags & (VM_READ | VM_WRITE | VM_EXEC);
+}
+
#ifdef CONFIG_SHMEM
/*
* The vma_is_shmem is not inline because it is used only by slow
@@ -1765,9 +1771,26 @@ extern unsigned long move_page_tables(struct vm_area_struct *vma,
unsigned long old_addr, struct vm_area_struct *new_vma,
unsigned long new_addr, unsigned long len,
bool need_rmap_locks);
+
+/*
+ * Flags used by change_protection(). For now we make it a bitmap so
+ * that we can pass in multiple flags just like parameters. However
+ * for now all the callers are only use one of the flags at the same
+ * time.
+ */
+/* Whether we should allow dirty bit accounting */
+#define MM_CP_DIRTY_ACCT (1UL << 0)
+/* Whether this protection change is for NUMA hints */
+#define MM_CP_PROT_NUMA (1UL << 1)
+/* Whether this change is for write protecting */
+#define MM_CP_UFFD_WP (1UL << 2) /* do wp */
+#define MM_CP_UFFD_WP_RESOLVE (1UL << 3) /* Resolve wp */
+#define MM_CP_UFFD_WP_ALL (MM_CP_UFFD_WP | \
+ MM_CP_UFFD_WP_RESOLVE)
+
extern unsigned long change_protection(struct vm_area_struct *vma, unsigned long start,
unsigned long end, pgprot_t newprot,
- int dirty_accountable, int prot_numa);
+ unsigned long cp_flags);
extern int mprotect_fixup(struct vm_area_struct *vma,
struct vm_area_struct **pprev, unsigned long start,
unsigned long end, unsigned long newflags);
diff --git a/include/linux/mm_inline.h b/include/linux/mm_inline.h
index 6f2fef7b0784..219bef41d87c 100644
--- a/include/linux/mm_inline.h
+++ b/include/linux/mm_inline.h
@@ -6,19 +6,20 @@
#include <linux/swap.h>
/**
- * page_is_file_cache - should the page be on a file LRU or anon LRU?
+ * page_is_file_lru - should the page be on a file LRU or anon LRU?
* @page: the page to test
*
- * Returns 1 if @page is page cache page backed by a regular filesystem,
- * or 0 if @page is anonymous, tmpfs or otherwise ram or swap backed.
- * Used by functions that manipulate the LRU lists, to sort a page
- * onto the right LRU list.
+ * Returns 1 if @page is a regular filesystem backed page cache page or a lazily
+ * freed anonymous page (e.g. via MADV_FREE). Returns 0 if @page is a normal
+ * anonymous page, a tmpfs page or otherwise ram or swap backed page. Used by
+ * functions that manipulate the LRU lists, to sort a page onto the right LRU
+ * list.
*
* We would like to get this info without a page flag, but the state
* needs to survive until the page is last deleted from the LRU, which
* could be as far down as __page_cache_release.
*/
-static inline int page_is_file_cache(struct page *page)
+static inline int page_is_file_lru(struct page *page)
{
return !PageSwapBacked(page);
}
@@ -75,7 +76,7 @@ static __always_inline void del_page_from_lru_list(struct page *page,
*/
static inline enum lru_list page_lru_base_type(struct page *page)
{
- if (page_is_file_cache(page))
+ if (page_is_file_lru(page))
return LRU_INACTIVE_FILE;
return LRU_INACTIVE_ANON;
}
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index dd555e6d23f3..4aba6c0c2ba8 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -289,8 +289,8 @@ struct vm_userfaultfd_ctx {};
#endif /* CONFIG_USERFAULTFD */
/*
- * This struct defines a memory VMM memory area. There is one of these
- * per VM-area/task. A VM area is any part of the process virtual memory
+ * This struct describes a virtual memory area. There is one of these
+ * per VM-area/task. A VM area is any part of the process virtual memory
* space that has a special rule for the page-fault handlers (ie a shared
* library, the executable area etc).
*/
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index e84d448988b6..e9892bf9eba9 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -100,41 +100,6 @@ struct free_area {
unsigned long nr_free;
};
-/* Used for pages not on another list */
-static inline void add_to_free_area(struct page *page, struct free_area *area,
- int migratetype)
-{
- list_add(&page->lru, &area->free_list[migratetype]);
- area->nr_free++;
-}
-
-/* Used for pages not on another list */
-static inline void add_to_free_area_tail(struct page *page, struct free_area *area,
- int migratetype)
-{
- list_add_tail(&page->lru, &area->free_list[migratetype]);
- area->nr_free++;
-}
-
-#ifdef CONFIG_SHUFFLE_PAGE_ALLOCATOR
-/* Used to preserve page allocation order entropy */
-void add_to_free_area_random(struct page *page, struct free_area *area,
- int migratetype);
-#else
-static inline void add_to_free_area_random(struct page *page,
- struct free_area *area, int migratetype)
-{
- add_to_free_area(page, area, migratetype);
-}
-#endif
-
-/* Used for pages which are on another list */
-static inline void move_to_free_area(struct page *page, struct free_area *area,
- int migratetype)
-{
- list_move(&page->lru, &area->free_list[migratetype]);
-}
-
static inline struct page *get_page_from_free_area(struct free_area *area,
int migratetype)
{
@@ -142,15 +107,6 @@ static inline struct page *get_page_from_free_area(struct free_area *area,
struct page, lru);
}
-static inline void del_page_from_free_area(struct page *page,
- struct free_area *area)
-{
- list_del(&page->lru);
- __ClearPageBuddy(page);
- set_page_private(page, 0);
- area->nr_free--;
-}
-
static inline bool free_area_empty(struct free_area *area, int migratetype)
{
return list_empty(&area->free_list[migratetype]);
@@ -708,7 +664,6 @@ struct deferred_split {
* Memory statistics and page replacement data structures are maintained on a
* per-zone basis.
*/
-struct bootmem_data;
typedef struct pglist_data {
struct zone node_zones[MAX_NR_ZONES];
struct zonelist node_zonelists[MAX_ZONELISTS];
@@ -1187,7 +1142,9 @@ static inline unsigned long section_nr_to_pfn(unsigned long sec)
#define SUBSECTION_ALIGN_DOWN(pfn) ((pfn) & PAGE_SUBSECTION_MASK)
struct mem_section_usage {
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
DECLARE_BITMAP(subsection_map, SUBSECTIONS_PER_SECTION);
+#endif
/* See declaration of similar field in struct zone */
unsigned long pageblock_flags[0];
};
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 77de28bfefb0..222f6f7b2bb3 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -63,6 +63,11 @@
* page_waitqueue(page) is a wait queue of all tasks waiting for the page
* to become unlocked.
*
+ * PG_swapbacked is set when a page uses swap as a backing storage. This are
+ * usually PageAnon or shmem pages but please note that even anonymous pages
+ * might lose their PG_swapbacked flag when they simply can be dropped (e.g. as
+ * a result of MADV_FREE).
+ *
* PG_uptodate tells whether the page's contents is valid. When a read
* completes, the page becomes uptodate, unless a disk I/O error happened.
*
@@ -163,6 +168,9 @@ enum pageflags {
/* non-lru isolated movable page */
PG_isolated = PG_reclaim,
+
+ /* Only valid for buddy pages. Used to track pages that are reported */
+ PG_reported = PG_uptodate,
};
#ifndef __GENERATING_BOUNDS_H
@@ -432,6 +440,14 @@ PAGEFLAG(Idle, idle, PF_ANY)
#endif
/*
+ * PageReported() is used to track reported free pages within the Buddy
+ * allocator. We can use the non-atomic version of the test and set
+ * operations as both should be shielded with the zone lock to prevent
+ * any possible races on the setting or clearing of the bit.
+ */
+__PAGEFLAG(Reported, reported, PF_NO_COMPOUND)
+
+/*
* On an anonymous page mapped into a user virtual memory area,
* page->mapping points to its anon_vma, not to a struct address_space;
* with the PAGE_MAPPING_ANON bit set to distinguish it. See rmap.h.
diff --git a/include/linux/page_reporting.h b/include/linux/page_reporting.h
new file mode 100644
index 000000000000..3b99e0ec24f2
--- /dev/null
+++ b/include/linux/page_reporting.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_PAGE_REPORTING_H
+#define _LINUX_PAGE_REPORTING_H
+
+#include <linux/mmzone.h>
+#include <linux/scatterlist.h>
+
+/* This value should always be a power of 2, see page_reporting_cycle() */
+#define PAGE_REPORTING_CAPACITY 32
+
+struct page_reporting_dev_info {
+ /* function that alters pages to make them "reported" */
+ int (*report)(struct page_reporting_dev_info *prdev,
+ struct scatterlist *sg, unsigned int nents);
+
+ /* work struct for processing reports */
+ struct delayed_work work;
+
+ /* Current state of page reporting */
+ atomic_t state;
+};
+
+/* Tear-down and bring-up for page reporting devices */
+void page_reporting_unregister(struct page_reporting_dev_info *prdev);
+int page_reporting_register(struct page_reporting_dev_info *prdev);
+#endif /*_LINUX_PAGE_REPORTING_H */
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index f56282491a48..a8f7bd8ea1c6 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -341,9 +341,7 @@ static inline struct page *find_subpage(struct page *head, pgoff_t index)
if (PageHuge(head))
return head;
- VM_BUG_ON_PAGE(PageTail(head), head);
-
- return head + (index & (compound_nr(head) - 1));
+ return head + (index & (hpage_nr_pages(head) - 1));
}
struct page *find_get_entry(struct address_space *mapping, pgoff_t offset);
diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h
index 4f052496cdfd..0a4f54dd4737 100644
--- a/include/linux/percpu_counter.h
+++ b/include/linux/percpu_counter.h
@@ -78,9 +78,9 @@ static inline s64 percpu_counter_read(struct percpu_counter *fbc)
*/
static inline s64 percpu_counter_read_positive(struct percpu_counter *fbc)
{
- s64 ret = fbc->count;
+ /* Prevent reloads of fbc->count */
+ s64 ret = READ_ONCE(fbc->count);
- barrier(); /* Prevent reloads of fbc->count */
if (ret >= 0)
return ret;
return 0;
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 40a7982b7285..45c05fd9c99d 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -5,6 +5,7 @@
#ifndef _LINUX_PROC_FS_H
#define _LINUX_PROC_FS_H
+#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/fs.h>
@@ -12,7 +13,21 @@ struct proc_dir_entry;
struct seq_file;
struct seq_operations;
+enum {
+ /*
+ * All /proc entries using this ->proc_ops instance are never removed.
+ *
+ * If in doubt, ignore this flag.
+ */
+#ifdef MODULE
+ PROC_ENTRY_PERMANENT = 0U,
+#else
+ PROC_ENTRY_PERMANENT = 1U << 0,
+#endif
+};
+
struct proc_ops {
+ unsigned int proc_flags;
int (*proc_open)(struct inode *, struct file *);
ssize_t (*proc_read)(struct file *, char __user *, size_t, loff_t *);
ssize_t (*proc_write)(struct file *, const char __user *, size_t, loff_t *);
@@ -25,7 +40,7 @@ struct proc_ops {
#endif
int (*proc_mmap)(struct file *, struct vm_area_struct *);
unsigned long (*proc_get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
-};
+} __randomize_layout;
#ifdef CONFIG_PROC_FS
diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
index 770c2bf3aa43..1672cf6f7614 100644
--- a/include/linux/seq_file.h
+++ b/include/linux/seq_file.h
@@ -21,7 +21,6 @@ struct seq_file {
size_t pad_until;
loff_t index;
loff_t read_pos;
- u64 version;
struct mutex lock;
const struct seq_operations *op;
int poll_event;
diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h
index d56fefef8905..7a35a6901221 100644
--- a/include/linux/shmem_fs.h
+++ b/include/linux/shmem_fs.h
@@ -78,6 +78,7 @@ extern void shmem_truncate_range(struct inode *inode, loff_t start, loff_t end);
extern int shmem_unuse(unsigned int type, bool frontswap,
unsigned long *fs_pages_to_unuse);
+extern bool shmem_huge_enabled(struct vm_area_struct *vma);
extern unsigned long shmem_swap_usage(struct vm_area_struct *vma);
extern unsigned long shmem_partial_swap_usage(struct address_space *mapping,
pgoff_t start, pgoff_t end);
@@ -114,15 +115,6 @@ static inline bool shmem_file(struct file *file)
extern bool shmem_charge(struct inode *inode, long pages);
extern void shmem_uncharge(struct inode *inode, long pages);
-#ifdef CONFIG_TRANSPARENT_HUGE_PAGECACHE
-extern bool shmem_huge_enabled(struct vm_area_struct *vma);
-#else
-static inline bool shmem_huge_enabled(struct vm_area_struct *vma)
-{
- return false;
-}
-#endif
-
#ifdef CONFIG_SHMEM
extern int shmem_mcopy_atomic_pte(struct mm_struct *dst_mm, pmd_t *dst_pmd,
struct vm_area_struct *dst_vma,
diff --git a/include/linux/stackdepot.h b/include/linux/stackdepot.h
index 3efa97d482cb..24d49c732341 100644
--- a/include/linux/stackdepot.h
+++ b/include/linux/stackdepot.h
@@ -19,4 +19,6 @@ depot_stack_handle_t stack_depot_save(unsigned long *entries,
unsigned int stack_depot_fetch(depot_stack_handle_t handle,
unsigned long **entries);
+unsigned int filter_irq_stacks(unsigned long *entries, unsigned int nr_entries);
+
#endif
diff --git a/include/linux/swapops.h b/include/linux/swapops.h
index 877fd239b6ff..d9b7c9132c2f 100644
--- a/include/linux/swapops.h
+++ b/include/linux/swapops.h
@@ -68,6 +68,8 @@ static inline swp_entry_t pte_to_swp_entry(pte_t pte)
if (pte_swp_soft_dirty(pte))
pte = pte_swp_clear_soft_dirty(pte);
+ if (pte_swp_uffd_wp(pte))
+ pte = pte_swp_clear_uffd_wp(pte);
arch_entry = __pte_to_swp_entry(pte);
return swp_entry(__swp_type(arch_entry), __swp_offset(arch_entry));
}
@@ -348,7 +350,8 @@ static inline void num_poisoned_pages_inc(void)
}
#endif
-#if defined(CONFIG_MEMORY_FAILURE) || defined(CONFIG_MIGRATION)
+#if defined(CONFIG_MEMORY_FAILURE) || defined(CONFIG_MIGRATION) || \
+ defined(CONFIG_DEVICE_PRIVATE)
static inline int non_swap_entry(swp_entry_t entry)
{
return swp_type(entry) >= MAX_SWAPFILES;
diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h
index ac9d71e24b81..a8e5f3ea9bb2 100644
--- a/include/linux/userfaultfd_k.h
+++ b/include/linux/userfaultfd_k.h
@@ -14,6 +14,8 @@
#include <linux/userfaultfd.h> /* linux/include/uapi/linux/userfaultfd.h */
#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <asm-generic/pgtable_uffd.h>
/*
* CAREFUL: Check include/uapi/asm-generic/fcntl.h when defining
@@ -34,11 +36,14 @@ extern vm_fault_t handle_userfault(struct vm_fault *vmf, unsigned long reason);
extern ssize_t mcopy_atomic(struct mm_struct *dst_mm, unsigned long dst_start,
unsigned long src_start, unsigned long len,
- bool *mmap_changing);
+ bool *mmap_changing, __u64 mode);
extern ssize_t mfill_zeropage(struct mm_struct *dst_mm,
unsigned long dst_start,
unsigned long len,
bool *mmap_changing);
+extern int mwriteprotect_range(struct mm_struct *dst_mm,
+ unsigned long start, unsigned long len,
+ bool enable_wp, bool *mmap_changing);
/* mm helpers */
static inline bool is_mergeable_vm_userfaultfd_ctx(struct vm_area_struct *vma,
@@ -52,6 +57,23 @@ static inline bool userfaultfd_missing(struct vm_area_struct *vma)
return vma->vm_flags & VM_UFFD_MISSING;
}
+static inline bool userfaultfd_wp(struct vm_area_struct *vma)
+{
+ return vma->vm_flags & VM_UFFD_WP;
+}
+
+static inline bool userfaultfd_pte_wp(struct vm_area_struct *vma,
+ pte_t pte)
+{
+ return userfaultfd_wp(vma) && pte_uffd_wp(pte);
+}
+
+static inline bool userfaultfd_huge_pmd_wp(struct vm_area_struct *vma,
+ pmd_t pmd)
+{
+ return userfaultfd_wp(vma) && pmd_uffd_wp(pmd);
+}
+
static inline bool userfaultfd_armed(struct vm_area_struct *vma)
{
return vma->vm_flags & (VM_UFFD_MISSING | VM_UFFD_WP);
@@ -96,6 +118,24 @@ static inline bool userfaultfd_missing(struct vm_area_struct *vma)
return false;
}
+static inline bool userfaultfd_wp(struct vm_area_struct *vma)
+{
+ return false;
+}
+
+static inline bool userfaultfd_pte_wp(struct vm_area_struct *vma,
+ pte_t pte)
+{
+ return false;
+}
+
+static inline bool userfaultfd_huge_pmd_wp(struct vm_area_struct *vma,
+ pmd_t pmd)
+{
+ return false;
+}
+
+
static inline bool userfaultfd_armed(struct vm_area_struct *vma)
{
return false;
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index 47a3441cf4c4..ffef0f279747 100644
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h
@@ -73,9 +73,12 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
THP_FAULT_ALLOC,
THP_FAULT_FALLBACK,
+ THP_FAULT_FALLBACK_CHARGE,
THP_COLLAPSE_ALLOC,
THP_COLLAPSE_ALLOC_FAILED,
THP_FILE_ALLOC,
+ THP_FILE_FALLBACK,
+ THP_FILE_FALLBACK_CHARGE,
THP_FILE_MAPPED,
THP_SPLIT_PAGE,
THP_SPLIT_PAGE_FAILED,
@@ -115,6 +118,8 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
#ifndef CONFIG_TRANSPARENT_HUGEPAGE
#define THP_FILE_ALLOC ({ BUILD_BUG(); 0; })
+#define THP_FILE_FALLBACK ({ BUILD_BUG(); 0; })
+#define THP_FILE_FALLBACK_CHARGE ({ BUILD_BUG(); 0; })
#define THP_FILE_MAPPED ({ BUILD_BUG(); 0; })
#endif
diff --git a/include/trace/events/huge_memory.h b/include/trace/events/huge_memory.h
index d82a0f4e824d..70e32ff096ec 100644
--- a/include/trace/events/huge_memory.h
+++ b/include/trace/events/huge_memory.h
@@ -13,6 +13,7 @@
EM( SCAN_PMD_NULL, "pmd_null") \
EM( SCAN_EXCEED_NONE_PTE, "exceed_none_pte") \
EM( SCAN_PTE_NON_PRESENT, "pte_non_present") \
+ EM( SCAN_PTE_UFFD_WP, "pte_uffd_wp") \
EM( SCAN_PAGE_RO, "no_writable_page") \
EM( SCAN_LACK_REFERENCED_PAGE, "lack_referenced_page") \
EM( SCAN_PAGE_NULL, "page_null") \
diff --git a/include/trace/events/mmflags.h b/include/trace/events/mmflags.h
index a1675d43777e..5fb752034386 100644
--- a/include/trace/events/mmflags.h
+++ b/include/trace/events/mmflags.h
@@ -154,6 +154,7 @@ IF_HAVE_PG_IDLE(PG_idle, "idle" )
{VM_ACCOUNT, "account" }, \
{VM_NORESERVE, "noreserve" }, \
{VM_HUGETLB, "hugetlb" }, \
+ {VM_SYNC, "sync" }, \
__VM_ARCH_SPECIFIC_1 , \
{VM_WIPEONFORK, "wipeonfork" }, \
{VM_DONTDUMP, "dontdump" }, \
diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h
index a5ab2973e8dc..74bb594ccb25 100644
--- a/include/trace/events/vmscan.h
+++ b/include/trace/events/vmscan.h
@@ -323,7 +323,7 @@ TRACE_EVENT(mm_vmscan_writepage,
TP_fast_assign(
__entry->pfn = page_to_pfn(page);
__entry->reclaim_flags = trace_reclaim_flags(
- page_is_file_cache(page));
+ page_is_file_lru(page));
),
TP_printk("page=%p pfn=%lu flags=%s",
diff --git a/include/uapi/linux/userfaultfd.h b/include/uapi/linux/userfaultfd.h
index 48f1a7c2f1f0..e7e98bde221f 100644
--- a/include/uapi/linux/userfaultfd.h
+++ b/include/uapi/linux/userfaultfd.h
@@ -19,7 +19,8 @@
* means the userland is reading).
*/
#define UFFD_API ((__u64)0xAA)
-#define UFFD_API_FEATURES (UFFD_FEATURE_EVENT_FORK | \
+#define UFFD_API_FEATURES (UFFD_FEATURE_PAGEFAULT_FLAG_WP | \
+ UFFD_FEATURE_EVENT_FORK | \
UFFD_FEATURE_EVENT_REMAP | \
UFFD_FEATURE_EVENT_REMOVE | \
UFFD_FEATURE_EVENT_UNMAP | \
@@ -34,7 +35,8 @@
#define UFFD_API_RANGE_IOCTLS \
((__u64)1 << _UFFDIO_WAKE | \
(__u64)1 << _UFFDIO_COPY | \
- (__u64)1 << _UFFDIO_ZEROPAGE)
+ (__u64)1 << _UFFDIO_ZEROPAGE | \
+ (__u64)1 << _UFFDIO_WRITEPROTECT)
#define UFFD_API_RANGE_IOCTLS_BASIC \
((__u64)1 << _UFFDIO_WAKE | \
(__u64)1 << _UFFDIO_COPY)
@@ -52,6 +54,7 @@
#define _UFFDIO_WAKE (0x02)
#define _UFFDIO_COPY (0x03)
#define _UFFDIO_ZEROPAGE (0x04)
+#define _UFFDIO_WRITEPROTECT (0x06)
#define _UFFDIO_API (0x3F)
/* userfaultfd ioctl ids */
@@ -68,6 +71,8 @@
struct uffdio_copy)
#define UFFDIO_ZEROPAGE _IOWR(UFFDIO, _UFFDIO_ZEROPAGE, \
struct uffdio_zeropage)
+#define UFFDIO_WRITEPROTECT _IOWR(UFFDIO, _UFFDIO_WRITEPROTECT, \
+ struct uffdio_writeprotect)
/* read() structure */
struct uffd_msg {
@@ -203,13 +208,14 @@ struct uffdio_copy {
__u64 dst;
__u64 src;
__u64 len;
+#define UFFDIO_COPY_MODE_DONTWAKE ((__u64)1<<0)
/*
- * 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.
+ * UFFDIO_COPY_MODE_WP will map the page write protected on
+ * the fly. UFFDIO_COPY_MODE_WP is available only if the
+ * write protected ioctl is implemented for the range
+ * according to the uffdio_register.ioctls.
*/
-#define UFFDIO_COPY_MODE_DONTWAKE ((__u64)1<<0)
+#define UFFDIO_COPY_MODE_WP ((__u64)1<<1)
__u64 mode;
/*
@@ -231,4 +237,24 @@ struct uffdio_zeropage {
__s64 zeropage;
};
+struct uffdio_writeprotect {
+ struct uffdio_range range;
+/*
+ * UFFDIO_WRITEPROTECT_MODE_WP: set the flag to write protect a range,
+ * unset the flag to undo protection of a range which was previously
+ * write protected.
+ *
+ * UFFDIO_WRITEPROTECT_MODE_DONTWAKE: set the flag to avoid waking up
+ * any wait thread after the operation succeeds.
+ *
+ * NOTE: Write protecting a region (WP=1) is unrelated to page faults,
+ * therefore DONTWAKE flag is meaningless with WP=1. Removing write
+ * protection (WP=0) in response to a page fault wakes the faulting
+ * task unless DONTWAKE is set.
+ */
+#define UFFDIO_WRITEPROTECT_MODE_WP ((__u64)1<<0)
+#define UFFDIO_WRITEPROTECT_MODE_DONTWAKE ((__u64)1<<1)
+ __u64 mode;
+};
+
#endif /* _LINUX_USERFAULTFD_H */
diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h
index a1966cd7b677..19974392d324 100644
--- a/include/uapi/linux/virtio_balloon.h
+++ b/include/uapi/linux/virtio_balloon.h
@@ -36,6 +36,7 @@
#define VIRTIO_BALLOON_F_DEFLATE_ON_OOM 2 /* Deflate balloon on OOM */
#define VIRTIO_BALLOON_F_FREE_PAGE_HINT 3 /* VQ to report free pages */
#define VIRTIO_BALLOON_F_PAGE_POISON 4 /* Guest is using page poisoning */
+#define VIRTIO_BALLOON_F_REPORTING 5 /* Page reporting virtqueue */
/* Size of a PFN in the balloon interface. */
#define VIRTIO_BALLOON_PFN_SHIFT 12