#include "qapi/error.h"
#include "qemu/error-report.h"
#include "qemu/module.h"
+#include "qemu/madvise.h"
#include "sysemu/hostmem.h"
-#include "sysemu/sysemu.h"
#include "qom/object_interfaces.h"
+#include "qom/object.h"
-#define MEMORY_BACKEND_FILE(obj) \
- OBJECT_CHECK(HostMemoryBackendFile, (obj), TYPE_MEMORY_BACKEND_FILE)
+OBJECT_DECLARE_SIMPLE_TYPE(HostMemoryBackendFile, MEMORY_BACKEND_FILE)
-typedef struct HostMemoryBackendFile HostMemoryBackendFile;
struct HostMemoryBackendFile {
HostMemoryBackend parent_obj;
uint64_t align;
bool discard_data;
bool is_pmem;
+ bool readonly;
};
static void
object_get_typename(OBJECT(backend)));
#else
HostMemoryBackendFile *fb = MEMORY_BACKEND_FILE(backend);
+ uint32_t ram_flags;
gchar *name;
if (!backend->size) {
}
name = host_memory_backend_get_name(backend);
- memory_region_init_ram_from_file(&backend->mr, OBJECT(backend),
- name,
- backend->size, fb->align,
- (backend->share ? RAM_SHARED : 0) |
- (fb->is_pmem ? RAM_PMEM : 0),
- fb->mem_path, errp);
+ ram_flags = backend->share ? RAM_SHARED : 0;
+ ram_flags |= backend->reserve ? 0 : RAM_NORESERVE;
+ ram_flags |= fb->is_pmem ? RAM_PMEM : 0;
+ memory_region_init_ram_from_file(&backend->mr, OBJECT(backend), name,
+ backend->size, fb->align, ram_flags,
+ fb->mem_path, fb->readonly, errp);
g_free(name);
#endif
}
fb->align = val;
}
+#ifdef CONFIG_LIBPMEM
static bool file_memory_backend_get_pmem(Object *o, Error **errp)
{
return MEMORY_BACKEND_FILE(o)->is_pmem;
return;
}
-#ifndef CONFIG_LIBPMEM
- if (value) {
- error_setg(errp, "Lack of libpmem support while setting the 'pmem=on'"
- " of %s. We can't ensure data persistence.",
- object_get_typename(o));
+ fb->is_pmem = value;
+}
+#endif /* CONFIG_LIBPMEM */
+
+static bool file_memory_backend_get_readonly(Object *obj, Error **errp)
+{
+ HostMemoryBackendFile *fb = MEMORY_BACKEND_FILE(obj);
+
+ return fb->readonly;
+}
+
+static void file_memory_backend_set_readonly(Object *obj, bool value,
+ Error **errp)
+{
+ HostMemoryBackend *backend = MEMORY_BACKEND(obj);
+ HostMemoryBackendFile *fb = MEMORY_BACKEND_FILE(obj);
+
+ if (host_memory_backend_mr_inited(backend)) {
+ error_setg(errp, "cannot change property 'readonly' of %s.",
+ object_get_typename(obj));
return;
}
-#endif
- fb->is_pmem = value;
+ fb->readonly = value;
}
static void file_backend_unparent(Object *obj)
file_memory_backend_get_align,
file_memory_backend_set_align,
NULL, NULL);
+#ifdef CONFIG_LIBPMEM
object_class_property_add_bool(oc, "pmem",
file_memory_backend_get_pmem, file_memory_backend_set_pmem);
+#endif
+ object_class_property_add_bool(oc, "readonly",
+ file_memory_backend_get_readonly,
+ file_memory_backend_set_readonly);
}
static void file_backend_instance_finalize(Object *o)