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-rw-r--r--arch/s390/mm/pgtable.c17
1 files changed, 6 insertions, 11 deletions
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index 4d1f2bc..5d56c2b 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -160,6 +160,8 @@ struct gmap *gmap_alloc(struct mm_struct *mm)
table = (unsigned long *) page_to_phys(page);
crst_table_init(table, _REGION1_ENTRY_EMPTY);
gmap->table = table;
+ gmap->asce = _ASCE_TYPE_REGION1 | _ASCE_TABLE_LENGTH |
+ _ASCE_USER_BITS | __pa(table);
list_add(&gmap->list, &mm->context.gmap_list);
return gmap;
@@ -240,10 +242,6 @@ EXPORT_SYMBOL_GPL(gmap_free);
*/
void gmap_enable(struct gmap *gmap)
{
- /* Load primary space page table origin. */
- S390_lowcore.user_asce = _ASCE_TYPE_REGION1 | _ASCE_TABLE_LENGTH |
- _ASCE_USER_BITS | __pa(gmap->table);
- asm volatile("lctlg 1,1,%0\n" : : "m" (S390_lowcore.user_asce) );
S390_lowcore.gmap = (unsigned long) gmap;
}
EXPORT_SYMBOL_GPL(gmap_enable);
@@ -254,10 +252,6 @@ EXPORT_SYMBOL_GPL(gmap_enable);
*/
void gmap_disable(struct gmap *gmap)
{
- /* Load primary space page table origin. */
- S390_lowcore.user_asce =
- gmap->mm->context.asce_bits | __pa(gmap->mm->pgd);
- asm volatile("lctlg 1,1,%0\n" : : "m" (S390_lowcore.user_asce) );
S390_lowcore.gmap = 0UL;
}
EXPORT_SYMBOL_GPL(gmap_disable);
@@ -309,15 +303,15 @@ int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len)
/* Walk the guest addr space page table */
table = gmap->table + (((to + off) >> 53) & 0x7ff);
if (*table & _REGION_ENTRY_INV)
- return 0;
+ goto out;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
table = table + (((to + off) >> 42) & 0x7ff);
if (*table & _REGION_ENTRY_INV)
- return 0;
+ goto out;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
table = table + (((to + off) >> 31) & 0x7ff);
if (*table & _REGION_ENTRY_INV)
- return 0;
+ goto out;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
table = table + (((to + off) >> 20) & 0x7ff);
@@ -325,6 +319,7 @@ int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len)
flush |= gmap_unlink_segment(gmap, table);
*table = _SEGMENT_ENTRY_INV;
}
+out:
up_read(&gmap->mm->mmap_sem);
if (flush)
gmap_flush_tlb(gmap);

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