| /* |
| * 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 "qemu/units.h" |
| #include "sysemu/hostmem.h" |
| #include "sysemu/numa.h" |
| #include "exec/cpu-common.h" |
| #include "exec/ramlist.h" |
| #include "qemu/bitmap.h" |
| #include "qemu/error-report.h" |
| #include "qapi/error.h" |
| #include "qapi/opts-visitor.h" |
| #include "qapi/qapi-visit-machine.h" |
| #include "sysemu/qtest.h" |
| #include "hw/core/cpu.h" |
| #include "hw/mem/pc-dimm.h" |
| #include "migration/vmstate.h" |
| #include "hw/boards.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; |
| bool numa_uses_legacy_mem(void) |
| { |
| return !have_memdevs; |
| } |
| |
| static int have_mem; |
| static int max_numa_nodeid; /* Highest specified NUMA node ID, plus one. |
| * For all nodes, nodeid < max_numa_nodeid |
| */ |
| |
| 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); |
| unsigned int max_cpus = ms->smp.max_cpus; |
| NodeInfo *numa_info = ms->numa_state->nodes; |
| |
| if (node->has_nodeid) { |
| nodenr = node->nodeid; |
| } else { |
| nodenr = ms->numa_state->num_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 not set the initiator, set it to MAX_NODES. And if |
| * HMAT is enabled and this node has no cpus, QEMU will raise error. |
| */ |
| numa_info[nodenr].initiator = MAX_NODES; |
| if (node->has_initiator) { |
| if (!ms->numa_state->hmat_enabled) { |
| error_setg(errp, "ACPI Heterogeneous Memory Attribute Table " |
| "(HMAT) is disabled, enable it with -machine hmat=on " |
| "before using any of hmat specific options"); |
| return; |
| } |
| |
| if (node->initiator >= MAX_NODES) { |
| error_report("The initiator id %" PRIu16 " expects an integer " |
| "between 0 and %d", node->initiator, |
| MAX_NODES - 1); |
| return; |
| } |
| |
| numa_info[nodenr].initiator = node->initiator; |
| } |
| |
| 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; |
| } |
| } |
| |
| have_memdevs = have_memdevs ? : node->has_memdev; |
| have_mem = have_mem ? : node->has_mem; |
| if ((node->has_mem && have_memdevs) || (node->has_memdev && have_mem)) { |
| error_setg(errp, "numa configuration should use either mem= or memdev=," |
| "mixing both is not allowed"); |
| return; |
| } |
| |
| if (node->has_mem) { |
| if (!mc->numa_mem_supported) { |
| error_setg(errp, "Parameter -numa node,mem is not supported by this" |
| " machine type"); |
| error_append_hint(errp, "Use -numa node,memdev instead\n"); |
| return; |
| } |
| |
| numa_info[nodenr].node_mem = node->mem; |
| if (!qtest_enabled()) { |
| warn_report("Parameter -numa node,mem is deprecated," |
| " use -numa node,memdev instead"); |
| } |
| } |
| 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); |
| ms->numa_state->num_nodes++; |
| } |
| |
| static |
| void parse_numa_distance(MachineState *ms, NumaDistOptions *dist, Error **errp) |
| { |
| uint16_t src = dist->src; |
| uint16_t dst = dist->dst; |
| uint8_t val = dist->val; |
| NodeInfo *numa_info = ms->numa_state->nodes; |
| |
| 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; |
| ms->numa_state->have_numa_distance = true; |
| } |
| |
| void parse_numa_hmat_lb(NumaState *numa_state, NumaHmatLBOptions *node, |
| Error **errp) |
| { |
| int i, first_bit, last_bit; |
| uint64_t max_entry, temp_base, bitmap_copy; |
| NodeInfo *numa_info = numa_state->nodes; |
| HMAT_LB_Info *hmat_lb = |
| numa_state->hmat_lb[node->hierarchy][node->data_type]; |
| HMAT_LB_Data lb_data = {}; |
| HMAT_LB_Data *lb_temp; |
| |
| /* Error checking */ |
| if (node->initiator > numa_state->num_nodes) { |
| error_setg(errp, "Invalid initiator=%d, it should be less than %d", |
| node->initiator, numa_state->num_nodes); |
| return; |
| } |
| if (node->target > numa_state->num_nodes) { |
| error_setg(errp, "Invalid target=%d, it should be less than %d", |
| node->target, numa_state->num_nodes); |
| return; |
| } |
| if (!numa_info[node->initiator].has_cpu) { |
| error_setg(errp, "Invalid initiator=%d, it isn't an " |
| "initiator proximity domain", node->initiator); |
| return; |
| } |
| if (!numa_info[node->target].present) { |
| error_setg(errp, "The target=%d should point to an existing node", |
| node->target); |
| return; |
| } |
| |
| if (!hmat_lb) { |
| hmat_lb = g_malloc0(sizeof(*hmat_lb)); |
| numa_state->hmat_lb[node->hierarchy][node->data_type] = hmat_lb; |
| hmat_lb->list = g_array_new(false, true, sizeof(HMAT_LB_Data)); |
| } |
| hmat_lb->hierarchy = node->hierarchy; |
| hmat_lb->data_type = node->data_type; |
| lb_data.initiator = node->initiator; |
| lb_data.target = node->target; |
| |
| if (node->data_type <= HMATLB_DATA_TYPE_WRITE_LATENCY) { |
| /* Input latency data */ |
| |
| if (!node->has_latency) { |
| error_setg(errp, "Missing 'latency' option"); |
| return; |
| } |
| if (node->has_bandwidth) { |
| error_setg(errp, "Invalid option 'bandwidth' since " |
| "the data type is latency"); |
| return; |
| } |
| |
| /* Detect duplicate configuration */ |
| for (i = 0; i < hmat_lb->list->len; i++) { |
| lb_temp = &g_array_index(hmat_lb->list, HMAT_LB_Data, i); |
| |
| if (node->initiator == lb_temp->initiator && |
| node->target == lb_temp->target) { |
| error_setg(errp, "Duplicate configuration of the latency for " |
| "initiator=%d and target=%d", node->initiator, |
| node->target); |
| return; |
| } |
| } |
| |
| hmat_lb->base = hmat_lb->base ? hmat_lb->base : UINT64_MAX; |
| |
| if (node->latency) { |
| /* Calculate the temporary base and compressed latency */ |
| max_entry = node->latency; |
| temp_base = 1; |
| while (QEMU_IS_ALIGNED(max_entry, 10)) { |
| max_entry /= 10; |
| temp_base *= 10; |
| } |
| |
| /* Calculate the max compressed latency */ |
| temp_base = MIN(hmat_lb->base, temp_base); |
| max_entry = node->latency / hmat_lb->base; |
| max_entry = MAX(hmat_lb->range_bitmap, max_entry); |
| |
| /* |
| * For latency hmat_lb->range_bitmap record the max compressed |
| * latency which should be less than 0xFFFF (UINT16_MAX) |
| */ |
| if (max_entry >= UINT16_MAX) { |
| error_setg(errp, "Latency %" PRIu64 " between initiator=%d and " |
| "target=%d should not differ from previously entered " |
| "min or max values on more than %d", node->latency, |
| node->initiator, node->target, UINT16_MAX - 1); |
| return; |
| } else { |
| hmat_lb->base = temp_base; |
| hmat_lb->range_bitmap = max_entry; |
| } |
| |
| /* |
| * Set lb_info_provided bit 0 as 1, |
| * latency information is provided |
| */ |
| numa_info[node->target].lb_info_provided |= BIT(0); |
| } |
| lb_data.data = node->latency; |
| } else if (node->data_type >= HMATLB_DATA_TYPE_ACCESS_BANDWIDTH) { |
| /* Input bandwidth data */ |
| if (!node->has_bandwidth) { |
| error_setg(errp, "Missing 'bandwidth' option"); |
| return; |
| } |
| if (node->has_latency) { |
| error_setg(errp, "Invalid option 'latency' since " |
| "the data type is bandwidth"); |
| return; |
| } |
| if (!QEMU_IS_ALIGNED(node->bandwidth, MiB)) { |
| error_setg(errp, "Bandwidth %" PRIu64 " between initiator=%d and " |
| "target=%d should be 1MB aligned", node->bandwidth, |
| node->initiator, node->target); |
| return; |
| } |
| |
| /* Detect duplicate configuration */ |
| for (i = 0; i < hmat_lb->list->len; i++) { |
| lb_temp = &g_array_index(hmat_lb->list, HMAT_LB_Data, i); |
| |
| if (node->initiator == lb_temp->initiator && |
| node->target == lb_temp->target) { |
| error_setg(errp, "Duplicate configuration of the bandwidth for " |
| "initiator=%d and target=%d", node->initiator, |
| node->target); |
| return; |
| } |
| } |
| |
| hmat_lb->base = hmat_lb->base ? hmat_lb->base : 1; |
| |
| if (node->bandwidth) { |
| /* Keep bitmap unchanged when bandwidth out of range */ |
| bitmap_copy = hmat_lb->range_bitmap; |
| bitmap_copy |= node->bandwidth; |
| first_bit = ctz64(bitmap_copy); |
| temp_base = UINT64_C(1) << first_bit; |
| max_entry = node->bandwidth / temp_base; |
| last_bit = 64 - clz64(bitmap_copy); |
| |
| /* |
| * For bandwidth, first_bit record the base unit of bandwidth bits, |
| * last_bit record the last bit of the max bandwidth. The max |
| * compressed bandwidth should be less than 0xFFFF (UINT16_MAX) |
| */ |
| if ((last_bit - first_bit) > UINT16_BITS || |
| max_entry >= UINT16_MAX) { |
| error_setg(errp, "Bandwidth %" PRIu64 " between initiator=%d " |
| "and target=%d should not differ from previously " |
| "entered values on more than %d", node->bandwidth, |
| node->initiator, node->target, UINT16_MAX - 1); |
| return; |
| } else { |
| hmat_lb->base = temp_base; |
| hmat_lb->range_bitmap = bitmap_copy; |
| } |
| |
| /* |
| * Set lb_info_provided bit 1 as 1, |
| * bandwidth information is provided |
| */ |
| numa_info[node->target].lb_info_provided |= BIT(1); |
| } |
| lb_data.data = node->bandwidth; |
| } else { |
| assert(0); |
| } |
| |
| g_array_append_val(hmat_lb->list, lb_data); |
| } |
| |
| void parse_numa_hmat_cache(MachineState *ms, NumaHmatCacheOptions *node, |
| Error **errp) |
| { |
| int nb_numa_nodes = ms->numa_state->num_nodes; |
| NodeInfo *numa_info = ms->numa_state->nodes; |
| NumaHmatCacheOptions *hmat_cache = NULL; |
| |
| if (node->node_id >= nb_numa_nodes) { |
| error_setg(errp, "Invalid node-id=%" PRIu32 ", it should be less " |
| "than %d", node->node_id, nb_numa_nodes); |
| return; |
| } |
| |
| if (numa_info[node->node_id].lb_info_provided != (BIT(0) | BIT(1))) { |
| error_setg(errp, "The latency and bandwidth information of " |
| "node-id=%" PRIu32 " should be provided before memory side " |
| "cache attributes", node->node_id); |
| return; |
| } |
| |
| if (node->level < 1 || node->level >= HMAT_LB_LEVELS) { |
| error_setg(errp, "Invalid level=%" PRIu8 ", it should be larger than 0 " |
| "and less than or equal to %d", node->level, |
| HMAT_LB_LEVELS - 1); |
| return; |
| } |
| |
| assert(node->associativity < HMAT_CACHE_ASSOCIATIVITY__MAX); |
| assert(node->policy < HMAT_CACHE_WRITE_POLICY__MAX); |
| if (ms->numa_state->hmat_cache[node->node_id][node->level]) { |
| error_setg(errp, "Duplicate configuration of the side cache for " |
| "node-id=%" PRIu32 " and level=%" PRIu8, |
| node->node_id, node->level); |
| return; |
| } |
| |
| if ((node->level > 1) && |
| ms->numa_state->hmat_cache[node->node_id][node->level - 1] == NULL) { |
| error_setg(errp, "Cache level=%u shall be defined first", |
| node->level - 1); |
| return; |
| } |
| |
| if ((node->level > 1) && |
| (node->size <= |
| ms->numa_state->hmat_cache[node->node_id][node->level - 1]->size)) { |
| error_setg(errp, "Invalid size=%" PRIu64 ", the size of level=%" PRIu8 |
| " should be larger than the size(%" PRIu64 ") of " |
| "level=%u", node->size, node->level, |
| ms->numa_state->hmat_cache[node->node_id] |
| [node->level - 1]->size, |
| node->level - 1); |
| return; |
| } |
| |
| if ((node->level < HMAT_LB_LEVELS - 1) && |
| ms->numa_state->hmat_cache[node->node_id][node->level + 1] && |
| (node->size >= |
| ms->numa_state->hmat_cache[node->node_id][node->level + 1]->size)) { |
| error_setg(errp, "Invalid size=%" PRIu64 ", the size of level=%" PRIu8 |
| " should be less than the size(%" PRIu64 ") of " |
| "level=%u", node->size, node->level, |
| ms->numa_state->hmat_cache[node->node_id] |
| [node->level + 1]->size, |
| node->level + 1); |
| return; |
| } |
| |
| hmat_cache = g_malloc0(sizeof(*hmat_cache)); |
| memcpy(hmat_cache, node, sizeof(*hmat_cache)); |
| ms->numa_state->hmat_cache[node->node_id][node->level] = hmat_cache; |
| } |
| |
| void set_numa_options(MachineState *ms, NumaOptions *object, Error **errp) |
| { |
| if (!ms->numa_state) { |
| error_setg(errp, "NUMA is not supported by this machine-type"); |
| return; |
| } |
| |
| switch (object->type) { |
| case NUMA_OPTIONS_TYPE_NODE: |
| parse_numa_node(ms, &object->u.node, errp); |
| break; |
| case NUMA_OPTIONS_TYPE_DIST: |
| parse_numa_distance(ms, &object->u.dist, errp); |
| break; |
| case NUMA_OPTIONS_TYPE_CPU: |
| if (!object->u.cpu.has_node_id) { |
| error_setg(errp, "Missing mandatory node-id property"); |
| return; |
| } |
| if (!ms->numa_state->nodes[object->u.cpu.node_id].present) { |
| error_setg(errp, "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); |
| return; |
| } |
| |
| machine_set_cpu_numa_node(ms, |
| qapi_NumaCpuOptions_base(&object->u.cpu), |
| errp); |
| break; |
| case NUMA_OPTIONS_TYPE_HMAT_LB: |
| if (!ms->numa_state->hmat_enabled) { |
| error_setg(errp, "ACPI Heterogeneous Memory Attribute Table " |
| "(HMAT) is disabled, enable it with -machine hmat=on " |
| "before using any of hmat specific options"); |
| return; |
| } |
| |
| parse_numa_hmat_lb(ms->numa_state, &object->u.hmat_lb, errp); |
| break; |
| case NUMA_OPTIONS_TYPE_HMAT_CACHE: |
| if (!ms->numa_state->hmat_enabled) { |
| error_setg(errp, "ACPI Heterogeneous Memory Attribute Table " |
| "(HMAT) is disabled, enable it with -machine hmat=on " |
| "before using any of hmat specific options"); |
| return; |
| } |
| |
| parse_numa_hmat_cache(ms, &object->u.hmat_cache, errp); |
| break; |
| default: |
| abort(); |
| } |
| } |
| |
| 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, errp); |
| visit_free(v); |
| if (!object) { |
| return -1; |
| } |
| |
| /* 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); |
| |
| 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(MachineState *ms) |
| { |
| int src, dst; |
| bool is_asymmetrical = false; |
| int nb_numa_nodes = ms->numa_state->num_nodes; |
| NodeInfo *numa_info = ms->numa_state->nodes; |
| |
| 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(MachineState *ms) |
| { |
| int src, dst; |
| NodeInfo *numa_info = ms->numa_state->nodes; |
| |
| /* 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 < ms->numa_state->num_nodes; src++) { |
| for (dst = 0; dst < ms->numa_state->num_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]; |
| } |
| } |
| } |
| } |
| } |
| |
| static void numa_init_memdev_container(MachineState *ms, MemoryRegion *ram) |
| { |
| int i; |
| uint64_t addr = 0; |
| |
| for (i = 0; i < ms->numa_state->num_nodes; i++) { |
| uint64_t size = ms->numa_state->nodes[i].node_mem; |
| HostMemoryBackend *backend = ms->numa_state->nodes[i].node_memdev; |
| if (!backend) { |
| continue; |
| } |
| MemoryRegion *seg = machine_consume_memdev(ms, backend); |
| memory_region_add_subregion(ram, addr, seg); |
| addr += size; |
| } |
| } |
| |
| void numa_complete_configuration(MachineState *ms) |
| { |
| int i; |
| MachineClass *mc = MACHINE_GET_CLASS(ms); |
| NodeInfo *numa_info = ms->numa_state->nodes; |
| |
| /* |
| * If memory hotplug is enabled (slot > 0) or memory devices are enabled |
| * (ms->maxram_size > ms->ram_size) but without '-numa' options explicitly on |
| * CLI, guests 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. |
| * |
| * Or if MachineClass::auto_enable_numa is true and no NUMA nodes, |
| * assume there is just one node with whole RAM. |
| */ |
| if (ms->numa_state->num_nodes == 0 && |
| ((ms->ram_slots && mc->auto_enable_numa_with_memhp) || |
| (ms->maxram_size > ms->ram_size && mc->auto_enable_numa_with_memdev) || |
| mc->auto_enable_numa)) { |
| NumaNodeOptions node = { }; |
| parse_numa_node(ms, &node, &error_abort); |
| numa_info[0].node_mem = ms->ram_size; |
| } |
| |
| 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(ms->numa_state->num_nodes == max_numa_nodeid); |
| |
| if (ms->numa_state->num_nodes > 0) { |
| uint64_t numa_total; |
| |
| numa_total = 0; |
| for (i = 0; i < ms->numa_state->num_nodes; i++) { |
| numa_total += numa_info[i].node_mem; |
| } |
| if (numa_total != ms->ram_size) { |
| error_report("total memory for NUMA nodes (0x%" PRIx64 ")" |
| " should equal RAM size (0x" RAM_ADDR_FMT ")", |
| numa_total, ms->ram_size); |
| exit(1); |
| } |
| |
| if (!numa_uses_legacy_mem() && mc->default_ram_id) { |
| if (ms->ram_memdev_id) { |
| error_report("'-machine memory-backend' and '-numa memdev'" |
| " properties are mutually exclusive"); |
| exit(1); |
| } |
| ms->ram = g_new(MemoryRegion, 1); |
| memory_region_init(ms->ram, OBJECT(ms), mc->default_ram_id, |
| ms->ram_size); |
| numa_init_memdev_container(ms, ms->ram); |
| } |
| /* 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 (ms->numa_state->have_numa_distance) { |
| /* Validate enough NUMA distance information was provided. */ |
| validate_numa_distance(ms); |
| |
| /* Validation succeeded, now fill in any missing distances. */ |
| complete_init_numa_distance(ms); |
| } |
| } |
| } |
| |
| void parse_numa_opts(MachineState *ms) |
| { |
| qemu_opts_foreach(qemu_find_opts("numa"), parse_numa, ms, &error_fatal); |
| } |
| |
| 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), "node-id", |
| slot->props.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 numa_stat_memory_devices(NumaNodeMem node_mem[]) |
| { |
| MemoryDeviceInfoList *info_list = qmp_memory_device_list(); |
| MemoryDeviceInfoList *info; |
| PCDIMMDeviceInfo *pcdimm_info; |
| VirtioPMEMDeviceInfo *vpi; |
| VirtioMEMDeviceInfo *vmi; |
| |
| for (info = info_list; info; info = info->next) { |
| MemoryDeviceInfo *value = info->value; |
| |
| if (value) { |
| switch (value->type) { |
| case MEMORY_DEVICE_INFO_KIND_DIMM: |
| case MEMORY_DEVICE_INFO_KIND_NVDIMM: |
| pcdimm_info = value->type == MEMORY_DEVICE_INFO_KIND_DIMM ? |
| value->u.dimm.data : value->u.nvdimm.data; |
| node_mem[pcdimm_info->node].node_mem += pcdimm_info->size; |
| node_mem[pcdimm_info->node].node_plugged_mem += |
| pcdimm_info->size; |
| break; |
| case MEMORY_DEVICE_INFO_KIND_VIRTIO_PMEM: |
| vpi = value->u.virtio_pmem.data; |
| /* TODO: once we support numa, assign to right node */ |
| node_mem[0].node_mem += vpi->size; |
| node_mem[0].node_plugged_mem += vpi->size; |
| break; |
| case MEMORY_DEVICE_INFO_KIND_VIRTIO_MEM: |
| vmi = value->u.virtio_mem.data; |
| node_mem[vmi->node].node_mem += vmi->size; |
| node_mem[vmi->node].node_plugged_mem += vmi->size; |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| } |
| qapi_free_MemoryDeviceInfoList(info_list); |
| } |
| |
| void query_numa_node_mem(NumaNodeMem node_mem[], MachineState *ms) |
| { |
| int i; |
| |
| if (ms->numa_state == NULL || ms->numa_state->num_nodes <= 0) { |
| return; |
| } |
| |
| numa_stat_memory_devices(node_mem); |
| for (i = 0; i < ms->numa_state->num_nodes; i++) { |
| node_mem[i].node_mem += ms->numa_state->nodes[i].node_mem; |
| } |
| } |
| |
| static int ram_block_notify_add_single(RAMBlock *rb, void *opaque) |
| { |
| const ram_addr_t max_size = qemu_ram_get_max_length(rb); |
| const ram_addr_t size = qemu_ram_get_used_length(rb); |
| void *host = qemu_ram_get_host_addr(rb); |
| RAMBlockNotifier *notifier = opaque; |
| |
| if (host) { |
| notifier->ram_block_added(notifier, host, size, max_size); |
| } |
| return 0; |
| } |
| |
| void ram_block_notifier_add(RAMBlockNotifier *n) |
| { |
| QLIST_INSERT_HEAD(&ram_list.ramblock_notifiers, n, next); |
| |
| /* Notify about all existing ram blocks. */ |
| if (n->ram_block_added) { |
| qemu_ram_foreach_block(ram_block_notify_add_single, n); |
| } |
| } |
| |
| void ram_block_notifier_remove(RAMBlockNotifier *n) |
| { |
| QLIST_REMOVE(n, next); |
| } |
| |
| void ram_block_notify_add(void *host, size_t size, size_t max_size) |
| { |
| RAMBlockNotifier *notifier; |
| |
| QLIST_FOREACH(notifier, &ram_list.ramblock_notifiers, next) { |
| if (notifier->ram_block_added) { |
| notifier->ram_block_added(notifier, host, size, max_size); |
| } |
| } |
| } |
| |
| void ram_block_notify_remove(void *host, size_t size, size_t max_size) |
| { |
| RAMBlockNotifier *notifier; |
| |
| QLIST_FOREACH(notifier, &ram_list.ramblock_notifiers, next) { |
| if (notifier->ram_block_removed) { |
| notifier->ram_block_removed(notifier, host, size, max_size); |
| } |
| } |
| } |
| |
| void ram_block_notify_resize(void *host, size_t old_size, size_t new_size) |
| { |
| RAMBlockNotifier *notifier; |
| |
| QLIST_FOREACH(notifier, &ram_list.ramblock_notifiers, next) { |
| if (notifier->ram_block_resized) { |
| notifier->ram_block_resized(notifier, host, old_size, new_size); |
| } |
| } |
| } |
