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authorIgor Mammedov <imammedo@redhat.com>2014-06-06 17:54:29 +0200
committerMichael S. Tsirkin <mst@redhat.com>2014-06-18 21:10:30 +0300
commit1f07048933d9c21acb40bce18af4f3ad6bae59b6 (patch)
tree2533a08b489ebf6abb7b4d6f56619fa13a987ce5 /backends/hostmem-ram.c
parent2d9c2725f7bd08ffaf824b8c823f1423258ec78d (diff)
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add memdev backend infrastructure
Provides framework for splitting host RAM allocation/ policies into a separate backend that could be used by devices. Initially only legacy RAM backend is provided, which uses memory_region_init_ram() allocator and compatible with every CLI option that affects memory_region_init_ram(). Signed-off-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'backends/hostmem-ram.c')
-rw-r--r--backends/hostmem-ram.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/backends/hostmem-ram.c b/backends/hostmem-ram.c
new file mode 100644
index 0000000..bba2ebc
--- /dev/null
+++ b/backends/hostmem-ram.c
@@ -0,0 +1,54 @@
+/*
+ * QEMU Host Memory Backend
+ *
+ * Copyright (C) 2013-2014 Red Hat Inc
+ *
+ * Authors:
+ * Igor Mammedov <imammedo@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+#include "sysemu/hostmem.h"
+#include "qom/object_interfaces.h"
+
+#define TYPE_MEMORY_BACKEND_RAM "memory-backend-ram"
+
+
+static void
+ram_backend_memory_init(UserCreatable *uc, Error **errp)
+{
+ HostMemoryBackend *backend = MEMORY_BACKEND(uc);
+ char *path;
+
+ if (!backend->size) {
+ error_setg(errp, "can't create backend with size 0");
+ return;
+ }
+
+ path = object_get_canonical_path_component(OBJECT(backend));
+ memory_region_init_ram(&backend->mr, OBJECT(backend), path,
+ backend->size);
+ g_free(path);
+}
+
+static void
+ram_backend_class_init(ObjectClass *oc, void *data)
+{
+ UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
+
+ ucc->complete = ram_backend_memory_init;
+}
+
+static const TypeInfo ram_backend_info = {
+ .name = TYPE_MEMORY_BACKEND_RAM,
+ .parent = TYPE_MEMORY_BACKEND,
+ .class_init = ram_backend_class_init,
+};
+
+static void register_types(void)
+{
+ type_register_static(&ram_backend_info);
+}
+
+type_init(register_types);