tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef __MMU_H
2#define __MMU_H
3
4#include <linux/cpumask.h>
5#include <linux/errno.h>
6
7typedef struct {
8 cpumask_t cpu_attach_mask;
9 atomic_t attach_count;
10 unsigned int flush_mm;
11 spinlock_t list_lock;
12 struct list_head pgtable_list;
13 struct list_head gmap_list;
14 unsigned long asce;
15 unsigned long asce_limit;
16 unsigned long vdso_base;
17 /* The mmu context allocates 4K page tables. */
18 unsigned int alloc_pgste:1;
19 /* The mmu context uses extended page tables. */
20 unsigned int has_pgste:1;
21 /* The mmu context uses storage keys. */
22 unsigned int use_skey:1;
23} mm_context_t;
24
25#define INIT_MM_CONTEXT(name) \
26 .context.list_lock = __SPIN_LOCK_UNLOCKED(name.context.list_lock), \
27 .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \
28 .context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list),
29
30static inline int tprot(unsigned long addr)
31{
32 int rc = -EFAULT;
33
34 asm volatile(
35 " tprot 0(%1),0\n"
36 "0: ipm %0\n"
37 " srl %0,28\n"
38 "1:\n"
39 EX_TABLE(0b,1b)
40 : "+d" (rc) : "a" (addr) : "cc");
41 return rc;
42}
43
44#endif