| /* SPDX-License-Identifier: GPL-2.0 */ | |
| #ifndef __MMU_H | |
| #define __MMU_H | |
| #include <linux/cpumask.h> | |
| #include <linux/errno.h> | |
| #include <asm/asm-extable.h> | |
| typedef struct { | |
| spinlock_t lock; | |
| cpumask_t cpu_attach_mask; | |
| atomic_t flush_count; | |
| unsigned int flush_mm; | |
| struct list_head gmap_list; | |
| unsigned long gmap_asce; | |
| unsigned long asce; | |
| unsigned long asce_limit; | |
| unsigned long vdso_base; | |
| /* The mmu context belongs to a secure guest. */ | |
| atomic_t protected_count; | |
| /* | |
| * The mmu context allows COW-sharing of memory pages (KSM, zeropage). | |
| * Note that COW-sharing during fork() is currently always allowed. | |
| */ | |
| unsigned int allow_cow_sharing:1; | |
| } mm_context_t; | |
| #define INIT_MM_CONTEXT(name) \ | |
| .context.lock = __SPIN_LOCK_UNLOCKED(name.context.lock), \ | |
| .context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list), | |
| #endif |