46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/* 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 pgtable_list;
|
|
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.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \
|
|
.context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list),
|
|
|
|
#endif
|