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1 #ifndef __MMU_H
2 #define __MMU_H
3 
4 #include <linux/cpumask.h>
5 #include <linux/errno.h>
6 
7 typedef 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 
tprot(unsigned long addr)30 static 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
45