1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __MMU_H 3 #define __MMU_H 4 5 #include <linux/cpumask.h> 6 #include <linux/errno.h> 7 8 typedef struct { 9 spinlock_t lock; 10 cpumask_t cpu_attach_mask; 11 atomic_t flush_count; 12 unsigned int flush_mm; 13 struct list_head pgtable_list; 14 struct list_head gmap_list; 15 unsigned long gmap_asce; 16 unsigned long asce; 17 unsigned long asce_limit; 18 unsigned long vdso_base; 19 /* The mmu context allocates 4K page tables. */ 20 unsigned int alloc_pgste:1; 21 /* The mmu context uses extended page tables. */ 22 unsigned int has_pgste:1; 23 /* The mmu context uses storage keys. */ 24 unsigned int use_skey:1; 25 /* The mmu context uses CMM. */ 26 unsigned int uses_cmm:1; 27 } mm_context_t; 28 29 #define INIT_MM_CONTEXT(name) \ 30 .context.lock = __SPIN_LOCK_UNLOCKED(name.context.lock), \ 31 .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \ 32 .context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list), 33 34 static inline int tprot(unsigned long addr) 35 { 36 int rc = -EFAULT; 37 38 asm volatile( 39 " tprot 0(%1),0\n" 40 "0: ipm %0\n" 41 " srl %0,28\n" 42 "1:\n" 43 EX_TABLE(0b,1b) 44 : "+d" (rc) : "a" (addr) : "cc"); 45 return rc; 46 } 47 48 #endif 49