Imported Upstream version 2.1.0upstream/2.1.0

1 files changed, 399 insertions, 0 deletions

diff --git a/numa.c b/numa.c
new file mode 100644
index 000000000..7bf7834b7
--- /dev/null
+++ b/numa.c
@@ -0,0 +1,399 @@
+/*
+ * 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 "sysemu/sysemu.h"
+#include "exec/cpu-common.h"
+#include "qemu/bitmap.h"
+#include "qom/cpu.h"
+#include "qemu/error-report.h"
+#include "include/exec/cpu-common.h" /* for RAM_ADDR_FMT */
+#include "qapi-visit.h"
+#include "qapi/opts-visitor.h"
+#include "qapi/dealloc-visitor.h"
+#include "qapi/qmp/qerror.h"
+#include "hw/boards.h"
+#include "sysemu/hostmem.h"
+#include "qmp-commands.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 void numa_node_parse(NumaNodeOptions *node, QemuOpts *opts, Error **errp)
+{
+    uint16_t nodenr;
+    uint16List *cpus = NULL;
+
+    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 "\n", nodenr);
+        return;
+    }
+
+    if (numa_info[nodenr].present) {
+        error_setg(errp, "Duplicate NUMA nodeid: %" PRIu16, nodenr);
+        return;
+    }
+
+    for (cpus = node->cpus; cpus; cpus = cpus->next) {
+        if (cpus->value > MAX_CPUMASK_BITS) {
+            error_setg(errp, "CPU number %" PRIu16 " is bigger than %d",
+                       cpus->value, MAX_CPUMASK_BITS);
+            return;
+        }
+        bitmap_set(numa_info[nodenr].node_cpu, cpus->value, 1);
+    }
+
+    if (node->has_mem && node->has_memdev) {
+        error_setg(errp, "qemu: cannot specify both mem= and memdev=\n");
+        return;
+    }
+
+    if (have_memdevs == -1) {
+        have_memdevs = node->has_memdev;
+    }
+    if (node->has_memdev != have_memdevs) {
+        error_setg(errp, "qemu: memdev option must be specified for either "
+                   "all or no nodes\n");
+        return;
+    }
+
+    if (node->has_mem) {
+        uint64_t mem_size = node->mem;
+        const char *mem_str = qemu_opt_get(opts, "mem");
+        /* Fix up legacy suffix-less format */
+        if (g_ascii_isdigit(mem_str[strlen(mem_str) - 1])) {
+            mem_size <<= 20;
+        }
+        numa_info[nodenr].node_mem = mem_size;
+    }
+    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_int(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);
+}
+
+int numa_init_func(QemuOpts *opts, void *opaque)
+{
+    NumaOptions *object = NULL;
+    Error *err = NULL;
+
+    {
+        OptsVisitor *ov = opts_visitor_new(opts);
+        visit_type_NumaOptions(opts_get_visitor(ov), &object, NULL, &err);
+        opts_visitor_cleanup(ov);
+    }
+
+    if (err) {
+        goto error;
+    }
+
+    switch (object->kind) {
+    case NUMA_OPTIONS_KIND_NODE:
+        numa_node_parse(object->node, opts, &err);
+        if (err) {
+            goto error;
+        }
+        nb_numa_nodes++;
+        break;
+    default:
+        abort();
+    }
+
+    return 0;
+
+error:
+    qerror_report_err(err);
+    error_free(err);
+
+    if (object) {
+        QapiDeallocVisitor *dv = qapi_dealloc_visitor_new();
+        visit_type_NumaOptions(qapi_dealloc_get_visitor(dv),
+                               &object, NULL, NULL);
+        qapi_dealloc_visitor_cleanup(dv);
+    }
+
+    return -1;
+}
+
+void set_numa_nodes(void)
+{
+    int i;
+
+    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) {
+            uint64_t usedmem = 0;
+
+            /* On Linux, each node's border has to be 8MB aligned,
+             * the final node gets the rest.
+             */
+            for (i = 0; i < nb_numa_nodes - 1; i++) {
+                numa_info[i].node_mem = (ram_size / nb_numa_nodes) &
+                                        ~((1 << 23UL) - 1);
+                usedmem += numa_info[i].node_mem;
+            }
+            numa_info[i].node_mem = ram_size - usedmem;
+        }
+
+        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 (%" PRIu64 ")"
+                         " should equal RAM size (" RAM_ADDR_FMT ")",
+                         numa_total, ram_size);
+            exit(1);
+        }
+
+        for (i = 0; i < nb_numa_nodes; i++) {
+            if (!bitmap_empty(numa_info[i].node_cpu, MAX_CPUMASK_BITS)) {
+                break;
+            }
+        }
+        /* assigning the VCPUs round-robin is easier to implement, guest OSes
+         * must cope with this anyway, because there are BIOSes out there in
+         * real machines which also use this scheme.
+         */
+        if (i == nb_numa_nodes) {
+            for (i = 0; i < max_cpus; i++) {
+                set_bit(i, numa_info[i % nb_numa_nodes].node_cpu);
+            }
+        }
+    }
+}
+
+void set_numa_modes(void)
+{
+    CPUState *cpu;
+    int i;
+
+    CPU_FOREACH(cpu) {
+        for (i = 0; i < nb_numa_nodes; i++) {
+            if (test_bit(cpu->cpu_index, numa_info[i].node_cpu)) {
+                cpu->numa_node = i;
+            }
+        }
+    }
+}
+
+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, false,
+                                         mem_path, &err);
+
+        /* Legacy behavior: if allocation failed, fall back to
+         * regular RAM allocation.
+         */
+        if (err) {
+            qerror_report_err(err);
+            error_free(err);
+            memory_region_init_ram(mr, owner, name, ram_size);
+        }
+#else
+        fprintf(stderr, "-mem-path not supported on this host\n");
+        exit(1);
+#endif
+    } else {
+        memory_region_init_ram(mr, owner, name, ram_size);
+    }
+    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 < MAX_NODES; i++) {
+        Error *local_err = NULL;
+        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, &local_err);
+        if (local_err) {
+            qerror_report_err(local_err);
+            exit(1);
+        }
+
+        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);
+            exit(1);
+        }
+
+        memory_region_add_subregion(mr, addr, seg);
+        vmstate_register_ram_global(seg);
+        addr += size;
+    }
+}
+
+static int query_memdev(Object *obj, void *opaque)
+{
+    MemdevList **list = opaque;
+    Error *err = NULL;
+
+    if (object_dynamic_cast(obj, TYPE_MEMORY_BACKEND)) {
+        MemdevList *m = g_malloc0(sizeof(*m));
+
+        m->value = g_malloc0(sizeof(*m->value));
+
+        m->value->size = object_property_get_int(obj, "size",
+                                                 &err);
+        if (err) {
+            goto error;
+        }
+
+        m->value->merge = object_property_get_bool(obj, "merge",
+                                                   &err);
+        if (err) {
+            goto error;
+        }
+
+        m->value->dump = object_property_get_bool(obj, "dump",
+                                                  &err);
+        if (err) {
+            goto error;
+        }
+
+        m->value->prealloc = object_property_get_bool(obj,
+                                                      "prealloc", &err);
+        if (err) {
+            goto error;
+        }
+
+        m->value->policy = object_property_get_enum(obj,
+                                                    "policy",
+                                                    HostMemPolicy_lookup,
+                                                    &err);
+        if (err) {
+            goto error;
+        }
+
+        object_property_get_uint16List(obj, "host-nodes",
+                                       &m->value->host_nodes, &err);
+        if (err) {
+            goto error;
+        }
+
+        m->next = *list;
+        *list = m;
+    }
+
+    return 0;
+error:
+    return -1;
+}
+
+MemdevList *qmp_query_memdev(Error **errp)
+{
+    Object *obj;
+    MemdevList *list = NULL, *m;
+
+    obj = object_resolve_path("/objects", NULL);
+    if (obj == NULL) {
+        return NULL;
+    }
+
+    if (object_child_foreach(obj, query_memdev, &list) != 0) {
+        goto error;
+    }
+
+    return list;
+
+error:
+    while (list) {
+        m = list;
+        list = list->next;
+        g_free(m->value);
+        g_free(m);
+    }
+    return NULL;
+}