| /* 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 following bitfields need a down_write on the mm |
| * semaphore when they are written to. As they are only |
| * written once, they can be read without a lock. |
| * |
| * The mmu context allocates 4K page tables. |
| */ |
| unsigned int alloc_pgste:1; |
| /* The mmu context uses extended page tables. */ |
| unsigned int has_pgste:1; |
| /* The mmu context uses storage keys. */ |
| unsigned int uses_skeys:1; |
| /* The mmu context uses CMM. */ |
| unsigned int uses_cmm:1; |
| /* The gmaps associated with this context are allowed to use huge pages. */ |
| unsigned int allow_gmap_hpage_1m: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 |