1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/mm_types.h> 2 #include <linux/mm_types.h>
3 #include <linux/maple_tree.h> !! 3 #include <linux/rbtree.h>
4 #include <linux/rwsem.h> 4 #include <linux/rwsem.h>
5 #include <linux/spinlock.h> 5 #include <linux/spinlock.h>
6 #include <linux/list.h> 6 #include <linux/list.h>
7 #include <linux/cpumask.h> 7 #include <linux/cpumask.h>
8 #include <linux/mman.h> 8 #include <linux/mman.h>
9 #include <linux/pgtable.h> 9 #include <linux/pgtable.h>
10 10
11 #include <linux/atomic.h> 11 #include <linux/atomic.h>
12 #include <linux/user_namespace.h> 12 #include <linux/user_namespace.h>
13 #include <linux/iommu.h> <<
14 #include <asm/mmu.h> 13 #include <asm/mmu.h>
15 14
16 #ifndef INIT_MM_CONTEXT 15 #ifndef INIT_MM_CONTEXT
17 #define INIT_MM_CONTEXT(name) 16 #define INIT_MM_CONTEXT(name)
18 #endif 17 #endif
19 18
20 const struct vm_operations_struct vma_dummy_vm <<
21 <<
22 /* 19 /*
23 * For dynamically allocated mm_structs, there 20 * For dynamically allocated mm_structs, there is a dynamically sized cpumask
24 * at the end of the structure, the size of wh 21 * at the end of the structure, the size of which depends on the maximum CPU
25 * number the system can see. That way we allo 22 * number the system can see. That way we allocate only as much memory for
26 * mm_cpumask() as needed for the hundreds, or 23 * mm_cpumask() as needed for the hundreds, or thousands of processes that
27 * a system typically runs. 24 * a system typically runs.
28 * 25 *
29 * Since there is only one init_mm in the enti 26 * Since there is only one init_mm in the entire system, keep it simple
30 * and size this cpu_bitmask to NR_CPUS. 27 * and size this cpu_bitmask to NR_CPUS.
31 */ 28 */
32 struct mm_struct init_mm = { 29 struct mm_struct init_mm = {
33 .mm_mt = MTREE_INIT_EXT(mm_mt !! 30 .mm_rb = RB_ROOT,
34 .pgd = swapper_pg_dir, 31 .pgd = swapper_pg_dir,
35 .mm_users = ATOMIC_INIT(2), 32 .mm_users = ATOMIC_INIT(2),
36 .mm_count = ATOMIC_INIT(1), 33 .mm_count = ATOMIC_INIT(1),
37 .write_protect_seq = SEQCNT_ZERO(init_ 34 .write_protect_seq = SEQCNT_ZERO(init_mm.write_protect_seq),
38 MMAP_LOCK_INITIALIZER(init_mm) 35 MMAP_LOCK_INITIALIZER(init_mm)
39 .page_table_lock = __SPIN_LOCK_UNLOCK 36 .page_table_lock = __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock),
40 .arg_lock = __SPIN_LOCK_UNLOCKE 37 .arg_lock = __SPIN_LOCK_UNLOCKED(init_mm.arg_lock),
41 .mmlist = LIST_HEAD_INIT(init_ 38 .mmlist = LIST_HEAD_INIT(init_mm.mmlist),
42 #ifdef CONFIG_PER_VMA_LOCK <<
43 .mm_lock_seq = 0, <<
44 #endif <<
45 .user_ns = &init_user_ns, 39 .user_ns = &init_user_ns,
46 .cpu_bitmap = CPU_BITS_NONE, 40 .cpu_bitmap = CPU_BITS_NONE,
47 INIT_MM_CONTEXT(init_mm) 41 INIT_MM_CONTEXT(init_mm)
48 }; 42 };
49 <<
50 void setup_initial_init_mm(void *start_code, v <<
51 void *end_data, voi <<
52 { <<
53 init_mm.start_code = (unsigned long)st <<
54 init_mm.end_code = (unsigned long)end_ <<
55 init_mm.end_data = (unsigned long)end_ <<
56 init_mm.brk = (unsigned long)brk; <<
57 } <<
58 43
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