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 #include <asm/asm-extable.h> 8 9 typedef struct { 10 spinlock_t lock; 11 cpumask_t cpu_attach_mask; 12 atomic_t flush_count; 13 unsigned int flush_mm; 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 belongs to a secure guest. */ 20 atomic_t protected_count; 21 /* 22 * The mmu context allows COW-sharing of memory pages (KSM, zeropage). 23 * Note that COW-sharing during fork() is currently always allowed. 24 */ 25 unsigned int allow_cow_sharing:1; 26 } mm_context_t; 27 28 #define INIT_MM_CONTEXT(name) \ 29 .context.lock = __SPIN_LOCK_UNLOCKED(name.context.lock), \ 30 .context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list), 31 32 #endif 33