diff options
Diffstat (limited to 'arch/s390/include/asm/mmu.h')
| -rw-r--r-- | arch/s390/include/asm/mmu.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/s390/include/asm/mmu.h b/arch/s390/include/asm/mmu.h new file mode 100644 index 000000000..d29ad9545 --- /dev/null +++ b/arch/s390/include/asm/mmu.h @@ -0,0 +1,44 @@ +#ifndef __MMU_H +#define __MMU_H + +#include <linux/cpumask.h> +#include <linux/errno.h> + +typedef struct { + cpumask_t cpu_attach_mask; + atomic_t attach_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 asce_limit; + unsigned long vdso_base; + /* 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 use_skey: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), \ + .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 |