diff options
Diffstat (limited to 'backends')
| -rw-r--r-- | backends/Makefile.objs | 2 | ||||
| -rw-r--r-- | backends/hostmem-ram.c | 54 | ||||
| -rw-r--r-- | backends/hostmem.c | 97 |
3 files changed, 153 insertions, 0 deletions
diff --git a/backends/Makefile.objs b/backends/Makefile.objs index 591ddcf6f3..7fb7acdd11 100644 --- a/backends/Makefile.objs +++ b/backends/Makefile.objs @@ -6,3 +6,5 @@ common-obj-$(CONFIG_BRLAPI) += baum.o baum.o-cflags := $(SDL_CFLAGS) common-obj-$(CONFIG_TPM) += tpm.o + +common-obj-y += hostmem.o hostmem-ram.o diff --git a/backends/hostmem-ram.c b/backends/hostmem-ram.c new file mode 100644 index 0000000000..bba2ebcce8 --- /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); diff --git a/backends/hostmem.c b/backends/hostmem.c new file mode 100644 index 0000000000..2f578acc81 --- /dev/null +++ b/backends/hostmem.c @@ -0,0 +1,97 @@ +/* + * 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 "sysemu/sysemu.h" +#include "qapi/visitor.h" +#include "qapi/qmp/qerror.h" +#include "qemu/config-file.h" +#include "qom/object_interfaces.h" + +static void +hostmemory_backend_get_size(Object *obj, Visitor *v, void *opaque, + const char *name, Error **errp) +{ + HostMemoryBackend *backend = MEMORY_BACKEND(obj); + uint64_t value = backend->size; + + visit_type_size(v, &value, name, errp); +} + +static void +hostmemory_backend_set_size(Object *obj, Visitor *v, void *opaque, + const char *name, Error **errp) +{ + HostMemoryBackend *backend = MEMORY_BACKEND(obj); + Error *local_err = NULL; + uint64_t value; + + if (memory_region_size(&backend->mr)) { + error_setg(&local_err, "cannot change property value"); + goto out; + } + + visit_type_size(v, &value, name, &local_err); + if (local_err) { + goto out; + } + if (!value) { + error_setg(&local_err, "Property '%s.%s' doesn't take value '%" + PRIu64 "'", object_get_typename(obj), name, value); + goto out; + } + backend->size = value; +out: + error_propagate(errp, local_err); +} + +static void hostmemory_backend_init(Object *obj) +{ + object_property_add(obj, "size", "int", + hostmemory_backend_get_size, + hostmemory_backend_set_size, NULL, NULL, NULL); +} + +static void hostmemory_backend_finalize(Object *obj) +{ + HostMemoryBackend *backend = MEMORY_BACKEND(obj); + + if (memory_region_size(&backend->mr)) { + memory_region_destroy(&backend->mr); + } +} + +MemoryRegion * +host_memory_backend_get_memory(HostMemoryBackend *backend, Error **errp) +{ + return memory_region_size(&backend->mr) ? &backend->mr : NULL; +} + +static const TypeInfo hostmemory_backend_info = { + .name = TYPE_MEMORY_BACKEND, + .parent = TYPE_OBJECT, + .abstract = true, + .class_size = sizeof(HostMemoryBackendClass), + .instance_size = sizeof(HostMemoryBackend), + .instance_init = hostmemory_backend_init, + .instance_finalize = hostmemory_backend_finalize, + .interfaces = (InterfaceInfo[]) { + { TYPE_USER_CREATABLE }, + { } + } +}; + +static void register_types(void) +{ + type_register_static(&hostmemory_backend_info); +} + +type_init(register_types); |