summaryrefslogtreecommitdiffstats
path: root/arch/s390/include/asm/mmu.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/include/asm/mmu.h')
-rw-r--r--arch/s390/include/asm/mmu.h45
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/s390/include/asm/mmu.h b/arch/s390/include/asm/mmu.h
new file mode 100644
index 0000000000..829d68e2c6
--- /dev/null
+++ b/arch/s390/include/asm/mmu.h
@@ -0,0 +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 {
+ 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