VM: add the vm_wire_all call

This call maps the POSIX mlockall and munlockall calls.

* Makefrag.am (include_mach_HEADERS): Add include/mach/vm_wire.h.
* include/mach/gnumach.defs (vm_wire_t): New type.
(vm_wire_all): New routine.
* include/mach/mach_types.h: Include mach/vm_wire.h.
* vm/vm_map.c: Likewise.
(vm_map_enter): Automatically wire new entries if requested.
(vm_map_copyout): Likewise.
(vm_map_pageable_all): New function.
vm/vm_map.h: Include mach/vm_wire.h.
(struct vm_map): Update description of member `wiring_required'.
(vm_map_pageable_all): New function.
* vm/vm_user.c (vm_wire_all): New function.

3 files changed, 46 insertions, 0 deletions

diff --git a/include/mach/gnumach.defs b/include/mach/gnumach.defs
index 5235df63..b484accc 100644
--- a/include/mach/gnumach.defs
+++ b/include/mach/gnumach.defs
@@ -35,6 +35,8 @@ GNUMACH_IMPORTS
 
 type vm_cache_statistics_data_t = struct[11] of integer_t;
 
+type vm_wire_t = int;
+
 /*
  * Return page cache statistics for the host on which the target task
  * resides.
@@ -136,3 +138,16 @@ simpleroutine gsync_requeue(
   wake_one : boolean_t;
   flags : int);
 
+/*
+ * If the VM_WIRE_CURRENT flag is passed, specify that the entire
+ * virtual address space of the target task must not cause page faults.
+ *
+ * If the VM_WIRE_FUTURE flag is passed, automatically wire new
+ * mappings in the address space of the target task.
+ *
+ * If the flags are empty (VM_WIRE_NONE), unwire all mappings.
+ */
+routine	vm_wire_all(
+		host		: mach_port_t;
+		task		: vm_task_t;
+		flags		: vm_wire_t);
diff --git a/include/mach/mach_types.h b/include/mach/mach_types.h
index 87684824..65164a99 100644
--- a/include/mach/mach_types.h
+++ b/include/mach/mach_types.h
@@ -53,6 +53,7 @@
 #include <mach/vm_prot.h>
 #include <mach/vm_statistics.h>
 #include <mach/vm_cache_statistics.h>
+#include <mach/vm_wire.h>
 
 #ifdef	MACH_KERNEL
 #include <kern/task.h>		/* for task_array_t */
diff --git a/include/mach/vm_wire.h b/include/mach/vm_wire.h
new file mode 100644
index 00000000..1552dfa7
--- /dev/null
+++ b/include/mach/vm_wire.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2017 Free Software Foundation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _MACH_VM_WIRE_H_
+#define _MACH_VM_WIRE_H_
+
+typedef int vm_wire_t;
+
+#define VM_WIRE_NONE    0
+#define VM_WIRE_CURRENT 1
+#define VM_WIRE_FUTURE  2
+
+#define VM_WIRE_ALL     (VM_WIRE_CURRENT | VM_WIRE_FUTURE)
+
+#endif /* _MACH_VM_WIRE_H_ */