xnu-4570.61.1.tar.gz

[apple/xnu.git] / osfmk / vm / vm_user.c

diff --git a/osfmk/vm/vm_user.c b/osfmk/vm/vm_user.c
index f199dd4feeeb1ce1fd9e952ada6ddbc98d5f8acd..a1e2c51c32e0f4c226cf8b75a3a7676f9d05058c 100644 (file)
--- a/osfmk/vm/vm_user.c
+++ b/osfmk/vm/vm_user.c
@@ -2192,6 +2192,32 @@ mach_make_memory_entry_64(
        vm_prot_t               permission,
        ipc_port_t              *object_handle,
        ipc_port_t              parent_handle)
+{
+       if ((permission & MAP_MEM_FLAGS_MASK) & ~MAP_MEM_FLAGS_USER) {
+               /*
+                * Unknown flag: reject for forward compatibility.
+                */
+               return KERN_INVALID_VALUE;
+       }
+
+       return mach_make_memory_entry_internal(target_map,
+                                              size,
+                                              offset,
+                                              permission,
+                                              object_handle,
+                                              parent_handle);
+}
+
+extern int pacified_purgeable_iokit;
+
+kern_return_t
+mach_make_memory_entry_internal(
+       vm_map_t                target_map,
+       memory_object_size_t    *size,
+       memory_object_offset_t offset,
+       vm_prot_t               permission,
+       ipc_port_t              *object_handle,
+       ipc_port_t              parent_handle)
 {
        vm_map_version_t        version;
        vm_named_entry_t        parent_entry;
@@ -2234,7 +2260,7 @@ mach_make_memory_entry_64(
        boolean_t               use_data_addr;
        boolean_t               use_4K_compat;
 
-       if ((permission & MAP_MEM_FLAGS_MASK) & ~MAP_MEM_FLAGS_USER) {
+       if ((permission & MAP_MEM_FLAGS_MASK) & ~MAP_MEM_FLAGS_ALL) {
                /*
                 * Unknown flag: reject for forward compatibility.
                 */
@@ -2344,12 +2370,22 @@ mach_make_memory_entry_64(
                        assert(object->resident_page_count == 0);
                        assert(object->wired_page_count == 0);
                        vm_object_lock(object);
-                       if (object->purgeable_only_by_kernel) {
-                               vm_purgeable_nonvolatile_enqueue(object,
-                                                                kernel_task);
+                       if (pacified_purgeable_iokit) {
+                               if (permission & MAP_MEM_LEDGER_TAG_NETWORK) {
+                                       vm_purgeable_nonvolatile_enqueue(object,
+                                                                        kernel_task);
+                               } else {
+                                       vm_purgeable_nonvolatile_enqueue(object,
+                                                                        current_task());
+                               }
                        } else {
-                               vm_purgeable_nonvolatile_enqueue(object,
-                                                                current_task());
+                               if (object->purgeable_only_by_kernel) {
+                                       vm_purgeable_nonvolatile_enqueue(object,
+                                                                        kernel_task);
+                               } else {
+                                       vm_purgeable_nonvolatile_enqueue(object,
+                                                                        current_task());
+                               }
                        }
                        vm_object_unlock(object);
                }