diff options
Diffstat (limited to 'arch/s390/include/asm/mmu.h')
| -rw-r--r-- | arch/s390/include/asm/mmu.h | 53 |
1 files changed, 29 insertions, 24 deletions
diff --git a/arch/s390/include/asm/mmu.h b/arch/s390/include/asm/mmu.h index 6340178748bf..f07e49b419ab 100644 --- a/arch/s390/include/asm/mmu.h +++ b/arch/s390/include/asm/mmu.h @@ -1,40 +1,45 @@ +/* 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 { - atomic_t attach_count; + spinlock_t lock; + cpumask_t cpu_attach_mask; + atomic_t flush_count; unsigned int flush_mm; - spinlock_t list_lock; - struct list_head pgtable_list; struct list_head gmap_list; - unsigned long asce_bits; + unsigned long gmap_asce; + unsigned long asce; unsigned long asce_limit; unsigned long vdso_base; - /* Cloned contexts will be created with extended page tables. */ - unsigned int alloc_pgste:1; - /* The mmu context has extended page tables. */ + /* 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 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 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; + /* 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.list_lock = __SPIN_LOCK_UNLOCKED(name.context.list_lock), \ - .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \ +#define INIT_MM_CONTEXT(name) \ + .context.lock = __SPIN_LOCK_UNLOCKED(name.context.lock), \ .context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list), -static inline int tprot(unsigned long addr) -{ - int rc = -EFAULT; - - asm volatile( - " tprot 0(%1),0\n" - "0: ipm %0\n" - " srl %0,28\n" - "1:\n" - EX_TABLE(0b,1b) - : "+d" (rc) : "a" (addr) : "cc"); - return rc; -} - #endif |