projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2e58f173 IM |
2 | #ifndef _LINUX_MM_TYPES_TASK_H |
| 3 | #define _LINUX_MM_TYPES_TASK_H | |
| 4 | ||
| 9e7d2e44 IM |
5 | /* |
| 6 | * Here are the definitions of the MM data types that are embedded in 'struct task_struct'. | |
| 7 | * | |
| 8 | * (These are defined separately to decouple sched.h from mm_types.h as much as possible.) | |
| 9 | */ | |
| 10 | ||
| 2e58f173 IM |
11 | #include <linux/types.h> |
| 12 | #include <linux/threads.h> | |
| 13 | #include <linux/atomic.h> | |
| dcc2dc45 | 14 | #include <linux/cpumask.h> |
| 2e58f173 IM |
15 | |
| 16 | #include <asm/page.h> | |
| 17 | ||
| e73ad5ff AL |
18 | #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH |
| 19 | #include <asm/tlbbatch.h> | |
| 20 | #endif | |
| 21 | ||
| 9e7d2e44 IM |
22 | #define USE_SPLIT_PTE_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS) |
| 23 | #define USE_SPLIT_PMD_PTLOCKS (USE_SPLIT_PTE_PTLOCKS && \ | |
| 24 | IS_ENABLED(CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK)) | |
| 25 | #define ALLOC_SPLIT_PTLOCKS (SPINLOCK_SIZE > BITS_PER_LONG/8) | |
| 26 | ||
| 8495f7e6 SPP |
27 | /* |
| 28 | * When updating this, please also update struct resident_page_types[] in | |
| 29 | * kernel/fork.c | |
| 30 | */ | |
| 9e7d2e44 IM |
31 | enum { |
| 32 | MM_FILEPAGES, /* Resident file mapping pages */ | |
| 33 | MM_ANONPAGES, /* Resident anonymous pages */ | |
| 34 | MM_SWAPENTS, /* Anonymous swap entries */ | |
| 35 | MM_SHMEMPAGES, /* Resident shared memory pages */ | |
| 36 | NR_MM_COUNTERS | |
| 37 | }; | |
| 38 | ||
| 9e7d2e44 IM |
39 | struct page_frag { |
| 40 | struct page *page; | |
| 41 | #if (BITS_PER_LONG > 32) || (PAGE_SIZE >= 65536) | |
| 42 | __u32 offset; | |
| 43 | __u32 size; | |
| 44 | #else | |
| 45 | __u16 offset; | |
| 46 | __u16 size; | |
| 47 | #endif | |
| 48 | }; | |
| 49 | ||
| dcc2dc45 IM |
50 | /* Track pages that require TLB flushes */ |
| 51 | struct tlbflush_unmap_batch { | |
| 52 | #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH | |
| 53 | /* | |
| e73ad5ff AL |
54 | * The arch code makes the following promise: generic code can modify a |
| 55 | * PTE, then call arch_tlbbatch_add_mm() (which internally provides all | |
| 56 | * needed barriers), then call arch_tlbbatch_flush(), and the entries | |
| 57 | * will be flushed on all CPUs by the time that arch_tlbbatch_flush() | |
| 58 | * returns. | |
| dcc2dc45 | 59 | */ |
| e73ad5ff | 60 | struct arch_tlbflush_unmap_batch arch; |
| dcc2dc45 | 61 | |
| e73ad5ff | 62 | /* True if a flush is needed. */ |
| dcc2dc45 IM |
63 | bool flush_required; |
| 64 | ||
| 65 | /* | |
| 66 | * If true then the PTE was dirty when unmapped. The entry must be | |
| 67 | * flushed before IO is initiated or a stale TLB entry potentially | |
| 68 | * allows an update without redirtying the page. | |
| 69 | */ | |
| 70 | bool writable; | |
| 71 | #endif | |
| 72 | }; | |
| 73 | ||
| 2e58f173 | 74 | #endif /* _LINUX_MM_TYPES_TASK_H */ |