S: Supported
F: hw/core/machine.c
F: hw/core/null-machine.c
+F: hw/core/numa.c
F: hw/cpu/cluster.c
-F: numa.c
F: qapi/machine.json
F: qom/cpu.c
F: include/hw/boards.h
#########################################################
# System emulator target
ifdef CONFIG_SOFTMMU
-obj-y += arch_init.o cpus.o gdbstub.o balloon.o ioport.o numa.o
+obj-y += arch_init.o cpus.o gdbstub.o balloon.o ioport.o
obj-y += qtest.o
obj-y += hw/
obj-y += monitor/
common-obj-$(CONFIG_PLATFORM_BUS) += platform-bus.o
common-obj-$(CONFIG_SOFTMMU) += generic-loader.o
common-obj-$(CONFIG_SOFTMMU) += null-machine.o
+
+obj-$(CONFIG_SOFTMMU) += numa.o
--- /dev/null
+/*
+ * NUMA parameter parsing routines
+ *
+ * Copyright (c) 2014 Fujitsu Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "sysemu/numa.h"
+#include "exec/cpu-common.h"
+#include "exec/ramlist.h"
+#include "qemu/bitmap.h"
+#include "qom/cpu.h"
+#include "qemu/error-report.h"
+#include "qapi/error.h"
+#include "qapi/opts-visitor.h"
+#include "qapi/qapi-commands-machine.h"
+#include "qapi/qapi-visit-machine.h"
+#include "hw/boards.h"
+#include "sysemu/hostmem.h"
+#include "hw/mem/pc-dimm.h"
+#include "hw/mem/memory-device.h"
+#include "qemu/option.h"
+#include "qemu/config-file.h"
+#include "qemu/cutils.h"
+
+QemuOptsList qemu_numa_opts = {
+ .name = "numa",
+ .implied_opt_name = "type",
+ .head = QTAILQ_HEAD_INITIALIZER(qemu_numa_opts.head),
+ .desc = { { 0 } } /* validated with OptsVisitor */
+};
+
+static int have_memdevs = -1;
+static int max_numa_nodeid; /* Highest specified NUMA node ID, plus one.
+ * For all nodes, nodeid < max_numa_nodeid
+ */
+int nb_numa_nodes;
+bool have_numa_distance;
+NodeInfo numa_info[MAX_NODES];
+
+
+static void parse_numa_node(MachineState *ms, NumaNodeOptions *node,
+ Error **errp)
+{
+ Error *err = NULL;
+ uint16_t nodenr;
+ uint16List *cpus = NULL;
+ MachineClass *mc = MACHINE_GET_CLASS(ms);
+
+ if (node->has_nodeid) {
+ nodenr = node->nodeid;
+ } else {
+ nodenr = nb_numa_nodes;
+ }
+
+ if (nodenr >= MAX_NODES) {
+ error_setg(errp, "Max number of NUMA nodes reached: %"
+ PRIu16 "", nodenr);
+ return;
+ }
+
+ if (numa_info[nodenr].present) {
+ error_setg(errp, "Duplicate NUMA nodeid: %" PRIu16, nodenr);
+ return;
+ }
+
+ if (!mc->cpu_index_to_instance_props || !mc->get_default_cpu_node_id) {
+ error_setg(errp, "NUMA is not supported by this machine-type");
+ return;
+ }
+ for (cpus = node->cpus; cpus; cpus = cpus->next) {
+ CpuInstanceProperties props;
+ if (cpus->value >= max_cpus) {
+ error_setg(errp,
+ "CPU index (%" PRIu16 ")"
+ " should be smaller than maxcpus (%d)",
+ cpus->value, max_cpus);
+ return;
+ }
+ props = mc->cpu_index_to_instance_props(ms, cpus->value);
+ props.node_id = nodenr;
+ props.has_node_id = true;
+ machine_set_cpu_numa_node(ms, &props, &err);
+ if (err) {
+ error_propagate(errp, err);
+ return;
+ }
+ }
+
+ if (node->has_mem && node->has_memdev) {
+ error_setg(errp, "cannot specify both mem= and memdev=");
+ return;
+ }
+
+ if (have_memdevs == -1) {
+ have_memdevs = node->has_memdev;
+ }
+ if (node->has_memdev != have_memdevs) {
+ error_setg(errp, "memdev option must be specified for either "
+ "all or no nodes");
+ return;
+ }
+
+ if (node->has_mem) {
+ numa_info[nodenr].node_mem = node->mem;
+ }
+ if (node->has_memdev) {
+ Object *o;
+ o = object_resolve_path_type(node->memdev, TYPE_MEMORY_BACKEND, NULL);
+ if (!o) {
+ error_setg(errp, "memdev=%s is ambiguous", node->memdev);
+ return;
+ }
+
+ object_ref(o);
+ numa_info[nodenr].node_mem = object_property_get_uint(o, "size", NULL);
+ numa_info[nodenr].node_memdev = MEMORY_BACKEND(o);
+ }
+ numa_info[nodenr].present = true;
+ max_numa_nodeid = MAX(max_numa_nodeid, nodenr + 1);
+ nb_numa_nodes++;
+}
+
+static void parse_numa_distance(NumaDistOptions *dist, Error **errp)
+{
+ uint16_t src = dist->src;
+ uint16_t dst = dist->dst;
+ uint8_t val = dist->val;
+
+ if (src >= MAX_NODES || dst >= MAX_NODES) {
+ error_setg(errp, "Parameter '%s' expects an integer between 0 and %d",
+ src >= MAX_NODES ? "src" : "dst", MAX_NODES - 1);
+ return;
+ }
+
+ if (!numa_info[src].present || !numa_info[dst].present) {
+ error_setg(errp, "Source/Destination NUMA node is missing. "
+ "Please use '-numa node' option to declare it first.");
+ return;
+ }
+
+ if (val < NUMA_DISTANCE_MIN) {
+ error_setg(errp, "NUMA distance (%" PRIu8 ") is invalid, "
+ "it shouldn't be less than %d.",
+ val, NUMA_DISTANCE_MIN);
+ return;
+ }
+
+ if (src == dst && val != NUMA_DISTANCE_MIN) {
+ error_setg(errp, "Local distance of node %d should be %d.",
+ src, NUMA_DISTANCE_MIN);
+ return;
+ }
+
+ numa_info[src].distance[dst] = val;
+ have_numa_distance = true;
+}
+
+static
+void set_numa_options(MachineState *ms, NumaOptions *object, Error **errp)
+{
+ Error *err = NULL;
+
+ switch (object->type) {
+ case NUMA_OPTIONS_TYPE_NODE:
+ parse_numa_node(ms, &object->u.node, &err);
+ if (err) {
+ goto end;
+ }
+ break;
+ case NUMA_OPTIONS_TYPE_DIST:
+ parse_numa_distance(&object->u.dist, &err);
+ if (err) {
+ goto end;
+ }
+ break;
+ case NUMA_OPTIONS_TYPE_CPU:
+ if (!object->u.cpu.has_node_id) {
+ error_setg(&err, "Missing mandatory node-id property");
+ goto end;
+ }
+ if (!numa_info[object->u.cpu.node_id].present) {
+ error_setg(&err, "Invalid node-id=%" PRId64 ", NUMA node must be "
+ "defined with -numa node,nodeid=ID before it's used with "
+ "-numa cpu,node-id=ID", object->u.cpu.node_id);
+ goto end;
+ }
+
+ machine_set_cpu_numa_node(ms, qapi_NumaCpuOptions_base(&object->u.cpu),
+ &err);
+ break;
+ default:
+ abort();
+ }
+
+end:
+ error_propagate(errp, err);
+}
+
+static int parse_numa(void *opaque, QemuOpts *opts, Error **errp)
+{
+ NumaOptions *object = NULL;
+ MachineState *ms = MACHINE(opaque);
+ Error *err = NULL;
+ Visitor *v = opts_visitor_new(opts);
+
+ visit_type_NumaOptions(v, NULL, &object, &err);
+ visit_free(v);
+ if (err) {
+ goto end;
+ }
+
+ /* Fix up legacy suffix-less format */
+ if ((object->type == NUMA_OPTIONS_TYPE_NODE) && object->u.node.has_mem) {
+ const char *mem_str = qemu_opt_get(opts, "mem");
+ qemu_strtosz_MiB(mem_str, NULL, &object->u.node.mem);
+ }
+
+ set_numa_options(ms, object, &err);
+
+end:
+ qapi_free_NumaOptions(object);
+ if (err) {
+ error_propagate(errp, err);
+ return -1;
+ }
+
+ return 0;
+}
+
+/* If all node pair distances are symmetric, then only distances
+ * in one direction are enough. If there is even one asymmetric
+ * pair, though, then all distances must be provided. The
+ * distance from a node to itself is always NUMA_DISTANCE_MIN,
+ * so providing it is never necessary.
+ */
+static void validate_numa_distance(void)
+{
+ int src, dst;
+ bool is_asymmetrical = false;
+
+ for (src = 0; src < nb_numa_nodes; src++) {
+ for (dst = src; dst < nb_numa_nodes; dst++) {
+ if (numa_info[src].distance[dst] == 0 &&
+ numa_info[dst].distance[src] == 0) {
+ if (src != dst) {
+ error_report("The distance between node %d and %d is "
+ "missing, at least one distance value "
+ "between each nodes should be provided.",
+ src, dst);
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ if (numa_info[src].distance[dst] != 0 &&
+ numa_info[dst].distance[src] != 0 &&
+ numa_info[src].distance[dst] !=
+ numa_info[dst].distance[src]) {
+ is_asymmetrical = true;
+ }
+ }
+ }
+
+ if (is_asymmetrical) {
+ for (src = 0; src < nb_numa_nodes; src++) {
+ for (dst = 0; dst < nb_numa_nodes; dst++) {
+ if (src != dst && numa_info[src].distance[dst] == 0) {
+ error_report("At least one asymmetrical pair of "
+ "distances is given, please provide distances "
+ "for both directions of all node pairs.");
+ exit(EXIT_FAILURE);
+ }
+ }
+ }
+ }
+}
+
+static void complete_init_numa_distance(void)
+{
+ int src, dst;
+
+ /* Fixup NUMA distance by symmetric policy because if it is an
+ * asymmetric distance table, it should be a complete table and
+ * there would not be any missing distance except local node, which
+ * is verified by validate_numa_distance above.
+ */
+ for (src = 0; src < nb_numa_nodes; src++) {
+ for (dst = 0; dst < nb_numa_nodes; dst++) {
+ if (numa_info[src].distance[dst] == 0) {
+ if (src == dst) {
+ numa_info[src].distance[dst] = NUMA_DISTANCE_MIN;
+ } else {
+ numa_info[src].distance[dst] = numa_info[dst].distance[src];
+ }
+ }
+ }
+ }
+}
+
+void numa_legacy_auto_assign_ram(MachineClass *mc, NodeInfo *nodes,
+ int nb_nodes, ram_addr_t size)
+{
+ int i;
+ uint64_t usedmem = 0;
+
+ /* Align each node according to the alignment
+ * requirements of the machine class
+ */
+
+ for (i = 0; i < nb_nodes - 1; i++) {
+ nodes[i].node_mem = (size / nb_nodes) &
+ ~((1 << mc->numa_mem_align_shift) - 1);
+ usedmem += nodes[i].node_mem;
+ }
+ nodes[i].node_mem = size - usedmem;
+}
+
+void numa_default_auto_assign_ram(MachineClass *mc, NodeInfo *nodes,
+ int nb_nodes, ram_addr_t size)
+{
+ int i;
+ uint64_t usedmem = 0, node_mem;
+ uint64_t granularity = size / nb_nodes;
+ uint64_t propagate = 0;
+
+ for (i = 0; i < nb_nodes - 1; i++) {
+ node_mem = (granularity + propagate) &
+ ~((1 << mc->numa_mem_align_shift) - 1);
+ propagate = granularity + propagate - node_mem;
+ nodes[i].node_mem = node_mem;
+ usedmem += node_mem;
+ }
+ nodes[i].node_mem = size - usedmem;
+}
+
+void numa_complete_configuration(MachineState *ms)
+{
+ int i;
+ MachineClass *mc = MACHINE_GET_CLASS(ms);
+
+ /*
+ * If memory hotplug is enabled (slots > 0) but without '-numa'
+ * options explicitly on CLI, guestes will break.
+ *
+ * Windows: won't enable memory hotplug without SRAT table at all
+ *
+ * Linux: if QEMU is started with initial memory all below 4Gb
+ * and no SRAT table present, guest kernel will use nommu DMA ops,
+ * which breaks 32bit hw drivers when memory is hotplugged and
+ * guest tries to use it with that drivers.
+ *
+ * Enable NUMA implicitly by adding a new NUMA node automatically.
+ */
+ if (ms->ram_slots > 0 && nb_numa_nodes == 0 &&
+ mc->auto_enable_numa_with_memhp) {
+ NumaNodeOptions node = { };
+ parse_numa_node(ms, &node, &error_abort);
+ }
+
+ assert(max_numa_nodeid <= MAX_NODES);
+
+ /* No support for sparse NUMA node IDs yet: */
+ for (i = max_numa_nodeid - 1; i >= 0; i--) {
+ /* Report large node IDs first, to make mistakes easier to spot */
+ if (!numa_info[i].present) {
+ error_report("numa: Node ID missing: %d", i);
+ exit(1);
+ }
+ }
+
+ /* This must be always true if all nodes are present: */
+ assert(nb_numa_nodes == max_numa_nodeid);
+
+ if (nb_numa_nodes > 0) {
+ uint64_t numa_total;
+
+ if (nb_numa_nodes > MAX_NODES) {
+ nb_numa_nodes = MAX_NODES;
+ }
+
+ /* If no memory size is given for any node, assume the default case
+ * and distribute the available memory equally across all nodes
+ */
+ for (i = 0; i < nb_numa_nodes; i++) {
+ if (numa_info[i].node_mem != 0) {
+ break;
+ }
+ }
+ if (i == nb_numa_nodes) {
+ assert(mc->numa_auto_assign_ram);
+ mc->numa_auto_assign_ram(mc, numa_info, nb_numa_nodes, ram_size);
+ }
+
+ numa_total = 0;
+ for (i = 0; i < nb_numa_nodes; i++) {
+ numa_total += numa_info[i].node_mem;
+ }
+ if (numa_total != ram_size) {
+ error_report("total memory for NUMA nodes (0x%" PRIx64 ")"
+ " should equal RAM size (0x" RAM_ADDR_FMT ")",
+ numa_total, ram_size);
+ exit(1);
+ }
+
+ /* QEMU needs at least all unique node pair distances to build
+ * the whole NUMA distance table. QEMU treats the distance table
+ * as symmetric by default, i.e. distance A->B == distance B->A.
+ * Thus, QEMU is able to complete the distance table
+ * initialization even though only distance A->B is provided and
+ * distance B->A is not. QEMU knows the distance of a node to
+ * itself is always 10, so A->A distances may be omitted. When
+ * the distances of two nodes of a pair differ, i.e. distance
+ * A->B != distance B->A, then that means the distance table is
+ * asymmetric. In this case, the distances for both directions
+ * of all node pairs are required.
+ */
+ if (have_numa_distance) {
+ /* Validate enough NUMA distance information was provided. */
+ validate_numa_distance();
+
+ /* Validation succeeded, now fill in any missing distances. */
+ complete_init_numa_distance();
+ }
+ }
+}
+
+void parse_numa_opts(MachineState *ms)
+{
+ qemu_opts_foreach(qemu_find_opts("numa"), parse_numa, ms, &error_fatal);
+}
+
+void qmp_set_numa_node(NumaOptions *cmd, Error **errp)
+{
+ if (!runstate_check(RUN_STATE_PRECONFIG)) {
+ error_setg(errp, "The command is permitted only in '%s' state",
+ RunState_str(RUN_STATE_PRECONFIG));
+ return;
+ }
+
+ set_numa_options(MACHINE(qdev_get_machine()), cmd, errp);
+}
+
+void numa_cpu_pre_plug(const CPUArchId *slot, DeviceState *dev, Error **errp)
+{
+ int node_id = object_property_get_int(OBJECT(dev), "node-id", &error_abort);
+
+ if (node_id == CPU_UNSET_NUMA_NODE_ID) {
+ /* due to bug in libvirt, it doesn't pass node-id from props on
+ * device_add as expected, so we have to fix it up here */
+ if (slot->props.has_node_id) {
+ object_property_set_int(OBJECT(dev), slot->props.node_id,
+ "node-id", errp);
+ }
+ } else if (node_id != slot->props.node_id) {
+ error_setg(errp, "invalid node-id, must be %"PRId64,
+ slot->props.node_id);
+ }
+}
+
+static void allocate_system_memory_nonnuma(MemoryRegion *mr, Object *owner,
+ const char *name,
+ uint64_t ram_size)
+{
+ if (mem_path) {
+#ifdef __linux__
+ Error *err = NULL;
+ memory_region_init_ram_from_file(mr, owner, name, ram_size, 0, 0,
+ mem_path, &err);
+ if (err) {
+ error_report_err(err);
+ if (mem_prealloc) {
+ exit(1);
+ }
+ error_report("falling back to regular RAM allocation.");
+
+ /* Legacy behavior: if allocation failed, fall back to
+ * regular RAM allocation.
+ */
+ mem_path = NULL;
+ memory_region_init_ram_nomigrate(mr, owner, name, ram_size, &error_fatal);
+ }
+#else
+ fprintf(stderr, "-mem-path not supported on this host\n");
+ exit(1);
+#endif
+ } else {
+ memory_region_init_ram_nomigrate(mr, owner, name, ram_size, &error_fatal);
+ }
+ vmstate_register_ram_global(mr);
+}
+
+void memory_region_allocate_system_memory(MemoryRegion *mr, Object *owner,
+ const char *name,
+ uint64_t ram_size)
+{
+ uint64_t addr = 0;
+ int i;
+
+ if (nb_numa_nodes == 0 || !have_memdevs) {
+ allocate_system_memory_nonnuma(mr, owner, name, ram_size);
+ return;
+ }
+
+ memory_region_init(mr, owner, name, ram_size);
+ for (i = 0; i < nb_numa_nodes; i++) {
+ uint64_t size = numa_info[i].node_mem;
+ HostMemoryBackend *backend = numa_info[i].node_memdev;
+ if (!backend) {
+ continue;
+ }
+ MemoryRegion *seg = host_memory_backend_get_memory(backend);
+
+ if (memory_region_is_mapped(seg)) {
+ char *path = object_get_canonical_path_component(OBJECT(backend));
+ error_report("memory backend %s is used multiple times. Each "
+ "-numa option must use a different memdev value.",
+ path);
+ g_free(path);
+ exit(1);
+ }
+
+ host_memory_backend_set_mapped(backend, true);
+ memory_region_add_subregion(mr, addr, seg);
+ vmstate_register_ram_global(seg);
+ addr += size;
+ }
+}
+
+static void numa_stat_memory_devices(NumaNodeMem node_mem[])
+{
+ MemoryDeviceInfoList *info_list = qmp_memory_device_list();
+ MemoryDeviceInfoList *info;
+ PCDIMMDeviceInfo *pcdimm_info;
+
+ for (info = info_list; info; info = info->next) {
+ MemoryDeviceInfo *value = info->value;
+
+ if (value) {
+ switch (value->type) {
+ case MEMORY_DEVICE_INFO_KIND_DIMM:
+ pcdimm_info = value->u.dimm.data;
+ break;
+
+ case MEMORY_DEVICE_INFO_KIND_NVDIMM:
+ pcdimm_info = value->u.nvdimm.data;
+ break;
+
+ default:
+ pcdimm_info = NULL;
+ break;
+ }
+
+ if (pcdimm_info) {
+ node_mem[pcdimm_info->node].node_mem += pcdimm_info->size;
+ node_mem[pcdimm_info->node].node_plugged_mem +=
+ pcdimm_info->size;
+ }
+ }
+ }
+ qapi_free_MemoryDeviceInfoList(info_list);
+}
+
+void query_numa_node_mem(NumaNodeMem node_mem[])
+{
+ int i;
+
+ if (nb_numa_nodes <= 0) {
+ return;
+ }
+
+ numa_stat_memory_devices(node_mem);
+ for (i = 0; i < nb_numa_nodes; i++) {
+ node_mem[i].node_mem += numa_info[i].node_mem;
+ }
+}
+
+static int query_memdev(Object *obj, void *opaque)
+{
+ MemdevList **list = opaque;
+ MemdevList *m = NULL;
+
+ if (object_dynamic_cast(obj, TYPE_MEMORY_BACKEND)) {
+ m = g_malloc0(sizeof(*m));
+
+ m->value = g_malloc0(sizeof(*m->value));
+
+ m->value->id = object_get_canonical_path_component(obj);
+ m->value->has_id = !!m->value->id;
+
+ m->value->size = object_property_get_uint(obj, "size",
+ &error_abort);
+ m->value->merge = object_property_get_bool(obj, "merge",
+ &error_abort);
+ m->value->dump = object_property_get_bool(obj, "dump",
+ &error_abort);
+ m->value->prealloc = object_property_get_bool(obj,
+ "prealloc",
+ &error_abort);
+ m->value->policy = object_property_get_enum(obj,
+ "policy",
+ "HostMemPolicy",
+ &error_abort);
+ object_property_get_uint16List(obj, "host-nodes",
+ &m->value->host_nodes,
+ &error_abort);
+
+ m->next = *list;
+ *list = m;
+ }
+
+ return 0;
+}
+
+MemdevList *qmp_query_memdev(Error **errp)
+{
+ Object *obj = object_get_objects_root();
+ MemdevList *list = NULL;
+
+ object_child_foreach(obj, query_memdev, &list);
+ return list;
+}
+
+void ram_block_notifier_add(RAMBlockNotifier *n)
+{
+ QLIST_INSERT_HEAD(&ram_list.ramblock_notifiers, n, next);
+}
+
+void ram_block_notifier_remove(RAMBlockNotifier *n)
+{
+ QLIST_REMOVE(n, next);
+}
+
+void ram_block_notify_add(void *host, size_t size)
+{
+ RAMBlockNotifier *notifier;
+
+ QLIST_FOREACH(notifier, &ram_list.ramblock_notifiers, next) {
+ notifier->ram_block_added(notifier, host, size);
+ }
+}
+
+void ram_block_notify_remove(void *host, size_t size)
+{
+ RAMBlockNotifier *notifier;
+
+ QLIST_FOREACH(notifier, &ram_list.ramblock_notifiers, next) {
+ notifier->ram_block_removed(notifier, host, size);
+ }
+}
+++ /dev/null
-/*
- * NUMA parameter parsing routines
- *
- * Copyright (c) 2014 Fujitsu Ltd.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include "qemu/osdep.h"
-#include "sysemu/numa.h"
-#include "exec/cpu-common.h"
-#include "exec/ramlist.h"
-#include "qemu/bitmap.h"
-#include "qom/cpu.h"
-#include "qemu/error-report.h"
-#include "qapi/error.h"
-#include "qapi/opts-visitor.h"
-#include "qapi/qapi-commands-machine.h"
-#include "qapi/qapi-visit-machine.h"
-#include "hw/boards.h"
-#include "sysemu/hostmem.h"
-#include "hw/mem/pc-dimm.h"
-#include "hw/mem/memory-device.h"
-#include "qemu/option.h"
-#include "qemu/config-file.h"
-#include "qemu/cutils.h"
-
-QemuOptsList qemu_numa_opts = {
- .name = "numa",
- .implied_opt_name = "type",
- .head = QTAILQ_HEAD_INITIALIZER(qemu_numa_opts.head),
- .desc = { { 0 } } /* validated with OptsVisitor */
-};
-
-static int have_memdevs = -1;
-static int max_numa_nodeid; /* Highest specified NUMA node ID, plus one.
- * For all nodes, nodeid < max_numa_nodeid
- */
-int nb_numa_nodes;
-bool have_numa_distance;
-NodeInfo numa_info[MAX_NODES];
-
-
-static void parse_numa_node(MachineState *ms, NumaNodeOptions *node,
- Error **errp)
-{
- Error *err = NULL;
- uint16_t nodenr;
- uint16List *cpus = NULL;
- MachineClass *mc = MACHINE_GET_CLASS(ms);
-
- if (node->has_nodeid) {
- nodenr = node->nodeid;
- } else {
- nodenr = nb_numa_nodes;
- }
-
- if (nodenr >= MAX_NODES) {
- error_setg(errp, "Max number of NUMA nodes reached: %"
- PRIu16 "", nodenr);
- return;
- }
-
- if (numa_info[nodenr].present) {
- error_setg(errp, "Duplicate NUMA nodeid: %" PRIu16, nodenr);
- return;
- }
-
- if (!mc->cpu_index_to_instance_props || !mc->get_default_cpu_node_id) {
- error_setg(errp, "NUMA is not supported by this machine-type");
- return;
- }
- for (cpus = node->cpus; cpus; cpus = cpus->next) {
- CpuInstanceProperties props;
- if (cpus->value >= max_cpus) {
- error_setg(errp,
- "CPU index (%" PRIu16 ")"
- " should be smaller than maxcpus (%d)",
- cpus->value, max_cpus);
- return;
- }
- props = mc->cpu_index_to_instance_props(ms, cpus->value);
- props.node_id = nodenr;
- props.has_node_id = true;
- machine_set_cpu_numa_node(ms, &props, &err);
- if (err) {
- error_propagate(errp, err);
- return;
- }
- }
-
- if (node->has_mem && node->has_memdev) {
- error_setg(errp, "cannot specify both mem= and memdev=");
- return;
- }
-
- if (have_memdevs == -1) {
- have_memdevs = node->has_memdev;
- }
- if (node->has_memdev != have_memdevs) {
- error_setg(errp, "memdev option must be specified for either "
- "all or no nodes");
- return;
- }
-
- if (node->has_mem) {
- numa_info[nodenr].node_mem = node->mem;
- }
- if (node->has_memdev) {
- Object *o;
- o = object_resolve_path_type(node->memdev, TYPE_MEMORY_BACKEND, NULL);
- if (!o) {
- error_setg(errp, "memdev=%s is ambiguous", node->memdev);
- return;
- }
-
- object_ref(o);
- numa_info[nodenr].node_mem = object_property_get_uint(o, "size", NULL);
- numa_info[nodenr].node_memdev = MEMORY_BACKEND(o);
- }
- numa_info[nodenr].present = true;
- max_numa_nodeid = MAX(max_numa_nodeid, nodenr + 1);
- nb_numa_nodes++;
-}
-
-static void parse_numa_distance(NumaDistOptions *dist, Error **errp)
-{
- uint16_t src = dist->src;
- uint16_t dst = dist->dst;
- uint8_t val = dist->val;
-
- if (src >= MAX_NODES || dst >= MAX_NODES) {
- error_setg(errp, "Parameter '%s' expects an integer between 0 and %d",
- src >= MAX_NODES ? "src" : "dst", MAX_NODES - 1);
- return;
- }
-
- if (!numa_info[src].present || !numa_info[dst].present) {
- error_setg(errp, "Source/Destination NUMA node is missing. "
- "Please use '-numa node' option to declare it first.");
- return;
- }
-
- if (val < NUMA_DISTANCE_MIN) {
- error_setg(errp, "NUMA distance (%" PRIu8 ") is invalid, "
- "it shouldn't be less than %d.",
- val, NUMA_DISTANCE_MIN);
- return;
- }
-
- if (src == dst && val != NUMA_DISTANCE_MIN) {
- error_setg(errp, "Local distance of node %d should be %d.",
- src, NUMA_DISTANCE_MIN);
- return;
- }
-
- numa_info[src].distance[dst] = val;
- have_numa_distance = true;
-}
-
-static
-void set_numa_options(MachineState *ms, NumaOptions *object, Error **errp)
-{
- Error *err = NULL;
-
- switch (object->type) {
- case NUMA_OPTIONS_TYPE_NODE:
- parse_numa_node(ms, &object->u.node, &err);
- if (err) {
- goto end;
- }
- break;
- case NUMA_OPTIONS_TYPE_DIST:
- parse_numa_distance(&object->u.dist, &err);
- if (err) {
- goto end;
- }
- break;
- case NUMA_OPTIONS_TYPE_CPU:
- if (!object->u.cpu.has_node_id) {
- error_setg(&err, "Missing mandatory node-id property");
- goto end;
- }
- if (!numa_info[object->u.cpu.node_id].present) {
- error_setg(&err, "Invalid node-id=%" PRId64 ", NUMA node must be "
- "defined with -numa node,nodeid=ID before it's used with "
- "-numa cpu,node-id=ID", object->u.cpu.node_id);
- goto end;
- }
-
- machine_set_cpu_numa_node(ms, qapi_NumaCpuOptions_base(&object->u.cpu),
- &err);
- break;
- default:
- abort();
- }
-
-end:
- error_propagate(errp, err);
-}
-
-static int parse_numa(void *opaque, QemuOpts *opts, Error **errp)
-{
- NumaOptions *object = NULL;
- MachineState *ms = MACHINE(opaque);
- Error *err = NULL;
- Visitor *v = opts_visitor_new(opts);
-
- visit_type_NumaOptions(v, NULL, &object, &err);
- visit_free(v);
- if (err) {
- goto end;
- }
-
- /* Fix up legacy suffix-less format */
- if ((object->type == NUMA_OPTIONS_TYPE_NODE) && object->u.node.has_mem) {
- const char *mem_str = qemu_opt_get(opts, "mem");
- qemu_strtosz_MiB(mem_str, NULL, &object->u.node.mem);
- }
-
- set_numa_options(ms, object, &err);
-
-end:
- qapi_free_NumaOptions(object);
- if (err) {
- error_propagate(errp, err);
- return -1;
- }
-
- return 0;
-}
-
-/* If all node pair distances are symmetric, then only distances
- * in one direction are enough. If there is even one asymmetric
- * pair, though, then all distances must be provided. The
- * distance from a node to itself is always NUMA_DISTANCE_MIN,
- * so providing it is never necessary.
- */
-static void validate_numa_distance(void)
-{
- int src, dst;
- bool is_asymmetrical = false;
-
- for (src = 0; src < nb_numa_nodes; src++) {
- for (dst = src; dst < nb_numa_nodes; dst++) {
- if (numa_info[src].distance[dst] == 0 &&
- numa_info[dst].distance[src] == 0) {
- if (src != dst) {
- error_report("The distance between node %d and %d is "
- "missing, at least one distance value "
- "between each nodes should be provided.",
- src, dst);
- exit(EXIT_FAILURE);
- }
- }
-
- if (numa_info[src].distance[dst] != 0 &&
- numa_info[dst].distance[src] != 0 &&
- numa_info[src].distance[dst] !=
- numa_info[dst].distance[src]) {
- is_asymmetrical = true;
- }
- }
- }
-
- if (is_asymmetrical) {
- for (src = 0; src < nb_numa_nodes; src++) {
- for (dst = 0; dst < nb_numa_nodes; dst++) {
- if (src != dst && numa_info[src].distance[dst] == 0) {
- error_report("At least one asymmetrical pair of "
- "distances is given, please provide distances "
- "for both directions of all node pairs.");
- exit(EXIT_FAILURE);
- }
- }
- }
- }
-}
-
-static void complete_init_numa_distance(void)
-{
- int src, dst;
-
- /* Fixup NUMA distance by symmetric policy because if it is an
- * asymmetric distance table, it should be a complete table and
- * there would not be any missing distance except local node, which
- * is verified by validate_numa_distance above.
- */
- for (src = 0; src < nb_numa_nodes; src++) {
- for (dst = 0; dst < nb_numa_nodes; dst++) {
- if (numa_info[src].distance[dst] == 0) {
- if (src == dst) {
- numa_info[src].distance[dst] = NUMA_DISTANCE_MIN;
- } else {
- numa_info[src].distance[dst] = numa_info[dst].distance[src];
- }
- }
- }
- }
-}
-
-void numa_legacy_auto_assign_ram(MachineClass *mc, NodeInfo *nodes,
- int nb_nodes, ram_addr_t size)
-{
- int i;
- uint64_t usedmem = 0;
-
- /* Align each node according to the alignment
- * requirements of the machine class
- */
-
- for (i = 0; i < nb_nodes - 1; i++) {
- nodes[i].node_mem = (size / nb_nodes) &
- ~((1 << mc->numa_mem_align_shift) - 1);
- usedmem += nodes[i].node_mem;
- }
- nodes[i].node_mem = size - usedmem;
-}
-
-void numa_default_auto_assign_ram(MachineClass *mc, NodeInfo *nodes,
- int nb_nodes, ram_addr_t size)
-{
- int i;
- uint64_t usedmem = 0, node_mem;
- uint64_t granularity = size / nb_nodes;
- uint64_t propagate = 0;
-
- for (i = 0; i < nb_nodes - 1; i++) {
- node_mem = (granularity + propagate) &
- ~((1 << mc->numa_mem_align_shift) - 1);
- propagate = granularity + propagate - node_mem;
- nodes[i].node_mem = node_mem;
- usedmem += node_mem;
- }
- nodes[i].node_mem = size - usedmem;
-}
-
-void numa_complete_configuration(MachineState *ms)
-{
- int i;
- MachineClass *mc = MACHINE_GET_CLASS(ms);
-
- /*
- * If memory hotplug is enabled (slots > 0) but without '-numa'
- * options explicitly on CLI, guestes will break.
- *
- * Windows: won't enable memory hotplug without SRAT table at all
- *
- * Linux: if QEMU is started with initial memory all below 4Gb
- * and no SRAT table present, guest kernel will use nommu DMA ops,
- * which breaks 32bit hw drivers when memory is hotplugged and
- * guest tries to use it with that drivers.
- *
- * Enable NUMA implicitly by adding a new NUMA node automatically.
- */
- if (ms->ram_slots > 0 && nb_numa_nodes == 0 &&
- mc->auto_enable_numa_with_memhp) {
- NumaNodeOptions node = { };
- parse_numa_node(ms, &node, &error_abort);
- }
-
- assert(max_numa_nodeid <= MAX_NODES);
-
- /* No support for sparse NUMA node IDs yet: */
- for (i = max_numa_nodeid - 1; i >= 0; i--) {
- /* Report large node IDs first, to make mistakes easier to spot */
- if (!numa_info[i].present) {
- error_report("numa: Node ID missing: %d", i);
- exit(1);
- }
- }
-
- /* This must be always true if all nodes are present: */
- assert(nb_numa_nodes == max_numa_nodeid);
-
- if (nb_numa_nodes > 0) {
- uint64_t numa_total;
-
- if (nb_numa_nodes > MAX_NODES) {
- nb_numa_nodes = MAX_NODES;
- }
-
- /* If no memory size is given for any node, assume the default case
- * and distribute the available memory equally across all nodes
- */
- for (i = 0; i < nb_numa_nodes; i++) {
- if (numa_info[i].node_mem != 0) {
- break;
- }
- }
- if (i == nb_numa_nodes) {
- assert(mc->numa_auto_assign_ram);
- mc->numa_auto_assign_ram(mc, numa_info, nb_numa_nodes, ram_size);
- }
-
- numa_total = 0;
- for (i = 0; i < nb_numa_nodes; i++) {
- numa_total += numa_info[i].node_mem;
- }
- if (numa_total != ram_size) {
- error_report("total memory for NUMA nodes (0x%" PRIx64 ")"
- " should equal RAM size (0x" RAM_ADDR_FMT ")",
- numa_total, ram_size);
- exit(1);
- }
-
- /* QEMU needs at least all unique node pair distances to build
- * the whole NUMA distance table. QEMU treats the distance table
- * as symmetric by default, i.e. distance A->B == distance B->A.
- * Thus, QEMU is able to complete the distance table
- * initialization even though only distance A->B is provided and
- * distance B->A is not. QEMU knows the distance of a node to
- * itself is always 10, so A->A distances may be omitted. When
- * the distances of two nodes of a pair differ, i.e. distance
- * A->B != distance B->A, then that means the distance table is
- * asymmetric. In this case, the distances for both directions
- * of all node pairs are required.
- */
- if (have_numa_distance) {
- /* Validate enough NUMA distance information was provided. */
- validate_numa_distance();
-
- /* Validation succeeded, now fill in any missing distances. */
- complete_init_numa_distance();
- }
- }
-}
-
-void parse_numa_opts(MachineState *ms)
-{
- qemu_opts_foreach(qemu_find_opts("numa"), parse_numa, ms, &error_fatal);
-}
-
-void qmp_set_numa_node(NumaOptions *cmd, Error **errp)
-{
- if (!runstate_check(RUN_STATE_PRECONFIG)) {
- error_setg(errp, "The command is permitted only in '%s' state",
- RunState_str(RUN_STATE_PRECONFIG));
- return;
- }
-
- set_numa_options(MACHINE(qdev_get_machine()), cmd, errp);
-}
-
-void numa_cpu_pre_plug(const CPUArchId *slot, DeviceState *dev, Error **errp)
-{
- int node_id = object_property_get_int(OBJECT(dev), "node-id", &error_abort);
-
- if (node_id == CPU_UNSET_NUMA_NODE_ID) {
- /* due to bug in libvirt, it doesn't pass node-id from props on
- * device_add as expected, so we have to fix it up here */
- if (slot->props.has_node_id) {
- object_property_set_int(OBJECT(dev), slot->props.node_id,
- "node-id", errp);
- }
- } else if (node_id != slot->props.node_id) {
- error_setg(errp, "invalid node-id, must be %"PRId64,
- slot->props.node_id);
- }
-}
-
-static void allocate_system_memory_nonnuma(MemoryRegion *mr, Object *owner,
- const char *name,
- uint64_t ram_size)
-{
- if (mem_path) {
-#ifdef __linux__
- Error *err = NULL;
- memory_region_init_ram_from_file(mr, owner, name, ram_size, 0, 0,
- mem_path, &err);
- if (err) {
- error_report_err(err);
- if (mem_prealloc) {
- exit(1);
- }
- error_report("falling back to regular RAM allocation.");
-
- /* Legacy behavior: if allocation failed, fall back to
- * regular RAM allocation.
- */
- mem_path = NULL;
- memory_region_init_ram_nomigrate(mr, owner, name, ram_size, &error_fatal);
- }
-#else
- fprintf(stderr, "-mem-path not supported on this host\n");
- exit(1);
-#endif
- } else {
- memory_region_init_ram_nomigrate(mr, owner, name, ram_size, &error_fatal);
- }
- vmstate_register_ram_global(mr);
-}
-
-void memory_region_allocate_system_memory(MemoryRegion *mr, Object *owner,
- const char *name,
- uint64_t ram_size)
-{
- uint64_t addr = 0;
- int i;
-
- if (nb_numa_nodes == 0 || !have_memdevs) {
- allocate_system_memory_nonnuma(mr, owner, name, ram_size);
- return;
- }
-
- memory_region_init(mr, owner, name, ram_size);
- for (i = 0; i < nb_numa_nodes; i++) {
- uint64_t size = numa_info[i].node_mem;
- HostMemoryBackend *backend = numa_info[i].node_memdev;
- if (!backend) {
- continue;
- }
- MemoryRegion *seg = host_memory_backend_get_memory(backend);
-
- if (memory_region_is_mapped(seg)) {
- char *path = object_get_canonical_path_component(OBJECT(backend));
- error_report("memory backend %s is used multiple times. Each "
- "-numa option must use a different memdev value.",
- path);
- g_free(path);
- exit(1);
- }
-
- host_memory_backend_set_mapped(backend, true);
- memory_region_add_subregion(mr, addr, seg);
- vmstate_register_ram_global(seg);
- addr += size;
- }
-}
-
-static void numa_stat_memory_devices(NumaNodeMem node_mem[])
-{
- MemoryDeviceInfoList *info_list = qmp_memory_device_list();
- MemoryDeviceInfoList *info;
- PCDIMMDeviceInfo *pcdimm_info;
-
- for (info = info_list; info; info = info->next) {
- MemoryDeviceInfo *value = info->value;
-
- if (value) {
- switch (value->type) {
- case MEMORY_DEVICE_INFO_KIND_DIMM:
- pcdimm_info = value->u.dimm.data;
- break;
-
- case MEMORY_DEVICE_INFO_KIND_NVDIMM:
- pcdimm_info = value->u.nvdimm.data;
- break;
-
- default:
- pcdimm_info = NULL;
- break;
- }
-
- if (pcdimm_info) {
- node_mem[pcdimm_info->node].node_mem += pcdimm_info->size;
- node_mem[pcdimm_info->node].node_plugged_mem +=
- pcdimm_info->size;
- }
- }
- }
- qapi_free_MemoryDeviceInfoList(info_list);
-}
-
-void query_numa_node_mem(NumaNodeMem node_mem[])
-{
- int i;
-
- if (nb_numa_nodes <= 0) {
- return;
- }
-
- numa_stat_memory_devices(node_mem);
- for (i = 0; i < nb_numa_nodes; i++) {
- node_mem[i].node_mem += numa_info[i].node_mem;
- }
-}
-
-static int query_memdev(Object *obj, void *opaque)
-{
- MemdevList **list = opaque;
- MemdevList *m = NULL;
-
- if (object_dynamic_cast(obj, TYPE_MEMORY_BACKEND)) {
- m = g_malloc0(sizeof(*m));
-
- m->value = g_malloc0(sizeof(*m->value));
-
- m->value->id = object_get_canonical_path_component(obj);
- m->value->has_id = !!m->value->id;
-
- m->value->size = object_property_get_uint(obj, "size",
- &error_abort);
- m->value->merge = object_property_get_bool(obj, "merge",
- &error_abort);
- m->value->dump = object_property_get_bool(obj, "dump",
- &error_abort);
- m->value->prealloc = object_property_get_bool(obj,
- "prealloc",
- &error_abort);
- m->value->policy = object_property_get_enum(obj,
- "policy",
- "HostMemPolicy",
- &error_abort);
- object_property_get_uint16List(obj, "host-nodes",
- &m->value->host_nodes,
- &error_abort);
-
- m->next = *list;
- *list = m;
- }
-
- return 0;
-}
-
-MemdevList *qmp_query_memdev(Error **errp)
-{
- Object *obj = object_get_objects_root();
- MemdevList *list = NULL;
-
- object_child_foreach(obj, query_memdev, &list);
- return list;
-}
-
-void ram_block_notifier_add(RAMBlockNotifier *n)
-{
- QLIST_INSERT_HEAD(&ram_list.ramblock_notifiers, n, next);
-}
-
-void ram_block_notifier_remove(RAMBlockNotifier *n)
-{
- QLIST_REMOVE(n, next);
-}
-
-void ram_block_notify_add(void *host, size_t size)
-{
- RAMBlockNotifier *notifier;
-
- QLIST_FOREACH(notifier, &ram_list.ramblock_notifiers, next) {
- notifier->ram_block_added(notifier, host, size);
- }
-}
-
-void ram_block_notify_remove(void *host, size_t size)
-{
- RAMBlockNotifier *notifier;
-
- QLIST_FOREACH(notifier, &ram_list.ramblock_notifiers, next) {
- notifier->ram_block_removed(notifier, host, size);
- }
-}
projects / qemu.git / commitdiff