56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
#include <linux/mm_types.h>
|
||
|
|
#include <linux/rbtree.h>
|
||
|
|
#include <linux/rwsem.h>
|
||
|
|
#include <linux/spinlock.h>
|
||
|
|
#include <linux/list.h>
|
||
|
|
#include <linux/cpumask.h>
|
||
|
|
#include <linux/mman.h>
|
||
|
|
#include <linux/pgtable.h>
|
||
|
|
|
||
|
|
#include <linux/atomic.h>
|
||
|
|
#include <linux/user_namespace.h>
|
||
|
|
#include <linux/ioasid.h>
|
||
|
|
#include <asm/mmu.h>
|
||
|
|
|
||
|
|
#ifndef INIT_MM_CONTEXT
|
||
|
|
#define INIT_MM_CONTEXT(name)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* For dynamically allocated mm_structs, there is a dynamically sized cpumask
|
||
|
|
* at the end of the structure, the size of which depends on the maximum CPU
|
||
|
|
* number the system can see. That way we allocate only as much memory for
|
||
|
|
* mm_cpumask() as needed for the hundreds, or thousands of processes that
|
||
|
|
* a system typically runs.
|
||
|
|
*
|
||
|
|
* Since there is only one init_mm in the entire system, keep it simple
|
||
|
|
* and size this cpu_bitmask to NR_CPUS.
|
||
|
|
*/
|
||
|
|
struct mm_struct init_mm = {
|
||
|
|
.mm_rb = RB_ROOT,
|
||
|
|
.pgd = swapper_pg_dir,
|
||
|
|
.mm_users = ATOMIC_INIT(2),
|
||
|
|
.mm_count = ATOMIC_INIT(1),
|
||
|
|
.write_protect_seq = SEQCNT_ZERO(init_mm.write_protect_seq),
|
||
|
|
MMAP_LOCK_INITIALIZER(init_mm)
|
||
|
|
.page_table_lock = __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock),
|
||
|
|
.arg_lock = __SPIN_LOCK_UNLOCKED(init_mm.arg_lock),
|
||
|
|
.mmlist = LIST_HEAD_INIT(init_mm.mmlist),
|
||
|
|
.user_ns = &init_user_ns,
|
||
|
|
.cpu_bitmap = CPU_BITS_NONE,
|
||
|
|
#ifdef CONFIG_IOMMU_SVA
|
||
|
|
.pasid = INVALID_IOASID,
|
||
|
|
#endif
|
||
|
|
INIT_MM_CONTEXT(init_mm)
|
||
|
|
};
|
||
|
|
|
||
|
|
void setup_initial_init_mm(void *start_code, void *end_code,
|
||
|
|
void *end_data, void *brk)
|
||
|
|
{
|
||
|
|
init_mm.start_code = (unsigned long)start_code;
|
||
|
|
init_mm.end_code = (unsigned long)end_code;
|
||
|
|
init_mm.end_data = (unsigned long)end_data;
|
||
|
|
init_mm.brk = (unsigned long)brk;
|
||
|
|
}
|