* 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 "qemu/osdep.h"
#include "sysemu/hostmem.h"
+#include "hw/boards.h"
+#include "qapi/error.h"
+#include "qapi/qapi-builtin-visit.h"
#include "qapi/visitor.h"
-#include "qapi-types.h"
-#include "qapi-visit.h"
-#include "qapi/qmp/qerror.h"
#include "qemu/config-file.h"
#include "qom/object_interfaces.h"
+#include "qemu/mmap-alloc.h"
#ifdef CONFIG_NUMA
#include <numaif.h>
#endif
static void
-host_memory_backend_get_size(Object *obj, Visitor *v, void *opaque,
- const char *name, Error **errp)
+host_memory_backend_get_size(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
{
HostMemoryBackend *backend = MEMORY_BACKEND(obj);
uint64_t value = backend->size;
- visit_type_size(v, &value, name, errp);
+ visit_type_size(v, name, &value, errp);
}
static void
-host_memory_backend_set_size(Object *obj, Visitor *v, void *opaque,
- const char *name, Error **errp)
+host_memory_backend_set_size(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
{
HostMemoryBackend *backend = MEMORY_BACKEND(obj);
Error *local_err = NULL;
uint64_t value;
- if (memory_region_size(&backend->mr)) {
+ if (host_memory_backend_mr_inited(backend)) {
error_setg(&local_err, "cannot change property value");
goto out;
}
- visit_type_size(v, &value, name, &local_err);
+ visit_type_size(v, name, &value, &local_err);
if (local_err) {
goto out;
}
}
static void
-host_memory_backend_get_host_nodes(Object *obj, Visitor *v, void *opaque,
- const char *name, Error **errp)
+host_memory_backend_get_host_nodes(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
{
HostMemoryBackend *backend = MEMORY_BACKEND(obj);
uint16List *host_nodes = NULL;
node = &(*node)->next;
} while (true);
- visit_type_uint16List(v, &host_nodes, name, errp);
+ visit_type_uint16List(v, name, &host_nodes, errp);
}
static void
-host_memory_backend_set_host_nodes(Object *obj, Visitor *v, void *opaque,
- const char *name, Error **errp)
+host_memory_backend_set_host_nodes(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
{
#ifdef CONFIG_NUMA
HostMemoryBackend *backend = MEMORY_BACKEND(obj);
uint16List *l = NULL;
- visit_type_uint16List(v, &l, name, errp);
+ visit_type_uint16List(v, name, &l, errp);
while (l) {
bitmap_set(backend->host_nodes, l->value, 1);
{
HostMemoryBackend *backend = MEMORY_BACKEND(obj);
- if (!memory_region_size(&backend->mr)) {
+ if (!host_memory_backend_mr_inited(backend)) {
backend->merge = value;
return;
}
{
HostMemoryBackend *backend = MEMORY_BACKEND(obj);
- if (!memory_region_size(&backend->mr)) {
+ if (!host_memory_backend_mr_inited(backend)) {
backend->dump = value;
return;
}
static void host_memory_backend_set_prealloc(Object *obj, bool value,
Error **errp)
{
+ Error *local_err = NULL;
HostMemoryBackend *backend = MEMORY_BACKEND(obj);
if (backend->force_prealloc) {
}
}
- if (!memory_region_size(&backend->mr)) {
+ if (!host_memory_backend_mr_inited(backend)) {
backend->prealloc = value;
return;
}
void *ptr = memory_region_get_ram_ptr(&backend->mr);
uint64_t sz = memory_region_size(&backend->mr);
- os_mem_prealloc(fd, ptr, sz);
+ os_mem_prealloc(fd, ptr, sz, smp_cpus, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
backend->prealloc = true;
}
}
static void host_memory_backend_init(Object *obj)
{
HostMemoryBackend *backend = MEMORY_BACKEND(obj);
+ MachineState *machine = MACHINE(qdev_get_machine());
- backend->merge = qemu_opt_get_bool(qemu_get_machine_opts(),
- "mem-merge", true);
- backend->dump = qemu_opt_get_bool(qemu_get_machine_opts(),
- "dump-guest-core", true);
+ backend->merge = machine_mem_merge(machine);
+ backend->dump = machine_dump_guest_core(machine);
backend->prealloc = mem_prealloc;
+}
- object_property_add_bool(obj, "merge",
- host_memory_backend_get_merge,
- host_memory_backend_set_merge, NULL);
- object_property_add_bool(obj, "dump",
- host_memory_backend_get_dump,
- host_memory_backend_set_dump, NULL);
- object_property_add_bool(obj, "prealloc",
- host_memory_backend_get_prealloc,
- host_memory_backend_set_prealloc, NULL);
- object_property_add(obj, "size", "int",
- host_memory_backend_get_size,
- host_memory_backend_set_size, NULL, NULL, NULL);
- object_property_add(obj, "host-nodes", "int",
- host_memory_backend_get_host_nodes,
- host_memory_backend_set_host_nodes, NULL, NULL, NULL);
- object_property_add_enum(obj, "policy", "HostMemPolicy",
- HostMemPolicy_lookup,
- host_memory_backend_get_policy,
- host_memory_backend_set_policy, NULL);
+bool host_memory_backend_mr_inited(HostMemoryBackend *backend)
+{
+ /*
+ * NOTE: We forbid zero-length memory backend, so here zero means
+ * "we haven't inited the backend memory region yet".
+ */
+ return memory_region_size(&backend->mr) != 0;
}
MemoryRegion *
host_memory_backend_get_memory(HostMemoryBackend *backend, Error **errp)
{
- return memory_region_size(&backend->mr) ? &backend->mr : NULL;
+ return host_memory_backend_mr_inited(backend) ? &backend->mr : NULL;
+}
+
+void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped)
+{
+ backend->is_mapped = mapped;
+}
+
+bool host_memory_backend_is_mapped(HostMemoryBackend *backend)
+{
+ return backend->is_mapped;
}
+#ifdef __linux__
+size_t host_memory_backend_pagesize(HostMemoryBackend *memdev)
+{
+ Object *obj = OBJECT(memdev);
+ char *path = object_property_get_str(obj, "mem-path", NULL);
+ size_t pagesize = qemu_mempath_getpagesize(path);
+
+ g_free(path);
+ return pagesize;
+}
+#else
+size_t host_memory_backend_pagesize(HostMemoryBackend *memdev)
+{
+ return getpagesize();
+}
+#endif
+
static void
host_memory_backend_memory_complete(UserCreatable *uc, Error **errp)
{
if (bc->alloc) {
bc->alloc(backend, &local_err);
if (local_err) {
- error_propagate(errp, local_err);
- return;
+ goto out;
}
ptr = memory_region_get_ram_ptr(&backend->mr);
return;
} else if (maxnode == 0 && backend->policy != MPOL_DEFAULT) {
error_setg(errp, "host-nodes must be set for policy %s",
- HostMemPolicy_lookup[backend->policy]);
+ HostMemPolicy_str(backend->policy));
return;
}
assert(maxnode <= MAX_NODES);
if (mbind(ptr, sz, backend->policy,
maxnode ? backend->host_nodes : NULL, maxnode + 1, flags)) {
- error_setg_errno(errp, errno,
- "cannot bind memory to host NUMA nodes");
- return;
+ if (backend->policy != MPOL_DEFAULT || errno != ENOSYS) {
+ error_setg_errno(errp, errno,
+ "cannot bind memory to host NUMA nodes");
+ return;
+ }
}
#endif
/* Preallocate memory after the NUMA policy has been instantiated.
* specified NUMA policy in place.
*/
if (backend->prealloc) {
- os_mem_prealloc(memory_region_get_fd(&backend->mr), ptr, sz);
+ os_mem_prealloc(memory_region_get_fd(&backend->mr), ptr, sz,
+ smp_cpus, &local_err);
+ if (local_err) {
+ goto out;
+ }
}
}
+out:
+ error_propagate(errp, local_err);
}
static bool
-host_memory_backend_can_be_deleted(UserCreatable *uc, Error **errp)
+host_memory_backend_can_be_deleted(UserCreatable *uc)
{
- MemoryRegion *mr;
-
- mr = host_memory_backend_get_memory(MEMORY_BACKEND(uc), errp);
- if (memory_region_is_mapped(mr)) {
+ if (host_memory_backend_is_mapped(MEMORY_BACKEND(uc))) {
return false;
} else {
return true;
}
}
+static char *get_id(Object *o, Error **errp)
+{
+ HostMemoryBackend *backend = MEMORY_BACKEND(o);
+
+ return g_strdup(backend->id);
+}
+
+static void set_id(Object *o, const char *str, Error **errp)
+{
+ HostMemoryBackend *backend = MEMORY_BACKEND(o);
+
+ if (backend->id) {
+ error_setg(errp, "cannot change property value");
+ return;
+ }
+ backend->id = g_strdup(str);
+}
+
+static bool host_memory_backend_get_share(Object *o, Error **errp)
+{
+ HostMemoryBackend *backend = MEMORY_BACKEND(o);
+
+ return backend->share;
+}
+
+static void host_memory_backend_set_share(Object *o, bool value, Error **errp)
+{
+ HostMemoryBackend *backend = MEMORY_BACKEND(o);
+
+ if (host_memory_backend_mr_inited(backend)) {
+ error_setg(errp, "cannot change property value");
+ return;
+ }
+ backend->share = value;
+}
+
static void
host_memory_backend_class_init(ObjectClass *oc, void *data)
{
ucc->complete = host_memory_backend_memory_complete;
ucc->can_be_deleted = host_memory_backend_can_be_deleted;
+
+ object_class_property_add_bool(oc, "merge",
+ host_memory_backend_get_merge,
+ host_memory_backend_set_merge, &error_abort);
+ object_class_property_add_bool(oc, "dump",
+ host_memory_backend_get_dump,
+ host_memory_backend_set_dump, &error_abort);
+ object_class_property_add_bool(oc, "prealloc",
+ host_memory_backend_get_prealloc,
+ host_memory_backend_set_prealloc, &error_abort);
+ object_class_property_add(oc, "size", "int",
+ host_memory_backend_get_size,
+ host_memory_backend_set_size,
+ NULL, NULL, &error_abort);
+ object_class_property_add(oc, "host-nodes", "int",
+ host_memory_backend_get_host_nodes,
+ host_memory_backend_set_host_nodes,
+ NULL, NULL, &error_abort);
+ object_class_property_add_enum(oc, "policy", "HostMemPolicy",
+ &HostMemPolicy_lookup,
+ host_memory_backend_get_policy,
+ host_memory_backend_set_policy, &error_abort);
+ object_class_property_add_str(oc, "id", get_id, set_id, &error_abort);
+ object_class_property_add_bool(oc, "share",
+ host_memory_backend_get_share, host_memory_backend_set_share,
+ &error_abort);
+}
+
+static void host_memory_backend_finalize(Object *o)
+{
+ HostMemoryBackend *backend = MEMORY_BACKEND(o);
+ g_free(backend->id);
}
static const TypeInfo host_memory_backend_info = {
.class_init = host_memory_backend_class_init,
.instance_size = sizeof(HostMemoryBackend),
.instance_init = host_memory_backend_init,
+ .instance_finalize = host_memory_backend_finalize,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },
{ }
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