diff options
Diffstat (limited to 'qemu/numa.c')
| -rw-r--r-- | qemu/numa.c | 550 |
1 files changed, 0 insertions, 550 deletions
diff --git a/qemu/numa.c b/qemu/numa.c deleted file mode 100644 index 572712ccf..000000000 --- a/qemu/numa.c +++ /dev/null @@ -1,550 +0,0 @@ -/* - * 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 "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 "hw/boards.h" -#include "sysemu/hostmem.h" -#include "qmp-commands.h" -#include "hw/mem/pc-dimm.h" -#include "qemu/option.h" -#include "qemu/config-file.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; -NodeInfo numa_info[MAX_NODES]; - -void numa_set_mem_node_id(ram_addr_t addr, uint64_t size, uint32_t node) -{ - struct numa_addr_range *range; - - /* - * Memory-less nodes can come here with 0 size in which case, - * there is nothing to do. - */ - if (!size) { - return; - } - - range = g_malloc0(sizeof(*range)); - range->mem_start = addr; - range->mem_end = addr + size - 1; - QLIST_INSERT_HEAD(&numa_info[node].addr, range, entry); -} - -void numa_unset_mem_node_id(ram_addr_t addr, uint64_t size, uint32_t node) -{ - struct numa_addr_range *range, *next; - - QLIST_FOREACH_SAFE(range, &numa_info[node].addr, entry, next) { - if (addr == range->mem_start && (addr + size - 1) == range->mem_end) { - QLIST_REMOVE(range, entry); - g_free(range); - return; - } - } -} - -static void numa_set_mem_ranges(void) -{ - int i; - ram_addr_t mem_start = 0; - - /* - * Deduce start address of each node and use it to store - * the address range info in numa_info address range list - */ - for (i = 0; i < nb_numa_nodes; i++) { - numa_set_mem_node_id(mem_start, numa_info[i].node_mem, i); - mem_start += numa_info[i].node_mem; - } -} - -/* - * Check if @addr falls under NUMA @node. - */ -static bool numa_addr_belongs_to_node(ram_addr_t addr, uint32_t node) -{ - struct numa_addr_range *range; - - QLIST_FOREACH(range, &numa_info[node].addr, entry) { - if (addr >= range->mem_start && addr <= range->mem_end) { - return true; - } - } - return false; -} - -/* - * Given an address, return the index of the NUMA node to which the - * address belongs to. - */ -uint32_t numa_get_node(ram_addr_t addr, Error **errp) -{ - uint32_t i; - - /* For non NUMA configurations, check if the addr falls under node 0 */ - if (!nb_numa_nodes) { - if (numa_addr_belongs_to_node(addr, 0)) { - return 0; - } - } - - for (i = 0; i < nb_numa_nodes; i++) { - if (numa_addr_belongs_to_node(addr, i)) { - return i; - } - } - - error_setg(errp, "Address 0x" RAM_ADDR_FMT " doesn't belong to any " - "NUMA node", addr); - return -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 "", 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_cpus) { - error_setg(errp, - "CPU index (%" PRIu16 ")" - " should be smaller than maxcpus (%d)", - cpus->value, max_cpus); - 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="); - 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"); - 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); -} - -static int parse_numa(void *opaque, QemuOpts *opts, Error **errp) -{ - NumaOptions *object = NULL; - Error *err = NULL; - - { - OptsVisitor *ov = opts_visitor_new(opts); - visit_type_NumaOptions(opts_get_visitor(ov), NULL, &object, &err); - opts_visitor_cleanup(ov); - } - - if (err) { - goto error; - } - - switch (object->type) { - case NUMA_OPTIONS_KIND_NODE: - numa_node_parse(object->u.node.data, opts, &err); - if (err) { - goto error; - } - nb_numa_nodes++; - break; - default: - abort(); - } - - return 0; - -error: - error_report_err(err); - qapi_free_NumaOptions(object); - - return -1; -} - -static char *enumerate_cpus(unsigned long *cpus, int max_cpus) -{ - int cpu; - bool first = true; - GString *s = g_string_new(NULL); - - for (cpu = find_first_bit(cpus, max_cpus); - cpu < max_cpus; - cpu = find_next_bit(cpus, max_cpus, cpu + 1)) { - g_string_append_printf(s, "%s%d", first ? "" : " ", cpu); - first = false; - } - return g_string_free(s, FALSE); -} - -static void validate_numa_cpus(void) -{ - int i; - DECLARE_BITMAP(seen_cpus, MAX_CPUMASK_BITS); - - bitmap_zero(seen_cpus, MAX_CPUMASK_BITS); - for (i = 0; i < nb_numa_nodes; i++) { - if (bitmap_intersects(seen_cpus, numa_info[i].node_cpu, - MAX_CPUMASK_BITS)) { - bitmap_and(seen_cpus, seen_cpus, - numa_info[i].node_cpu, MAX_CPUMASK_BITS); - error_report("CPU(s) present in multiple NUMA nodes: %s", - enumerate_cpus(seen_cpus, max_cpus)); - exit(EXIT_FAILURE); - } - bitmap_or(seen_cpus, seen_cpus, - numa_info[i].node_cpu, MAX_CPUMASK_BITS); - } - - if (!bitmap_full(seen_cpus, max_cpus)) { - char *msg; - bitmap_complement(seen_cpus, seen_cpus, max_cpus); - msg = enumerate_cpus(seen_cpus, max_cpus); - error_report("warning: CPU(s) not present in any NUMA nodes: %s", msg); - error_report("warning: All CPU(s) up to maxcpus should be described " - "in NUMA config"); - g_free(msg); - } -} - -void parse_numa_opts(MachineClass *mc) -{ - int i; - - if (qemu_opts_foreach(qemu_find_opts("numa"), parse_numa, NULL, NULL)) { - exit(1); - } - - 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 (0x%" PRIx64 ")" - " should equal RAM size (0x" RAM_ADDR_FMT ")", - numa_total, ram_size); - exit(1); - } - - for (i = 0; i < nb_numa_nodes; i++) { - QLIST_INIT(&numa_info[i].addr); - } - - numa_set_mem_ranges(); - - for (i = 0; i < nb_numa_nodes; i++) { - if (!bitmap_empty(numa_info[i].node_cpu, MAX_CPUMASK_BITS)) { - break; - } - } - /* Historically VCPUs were assigned in round-robin order to NUMA - * nodes. However it causes issues with guest not handling it nice - * in case where cores/threads from a multicore CPU appear on - * different nodes. So allow boards to override default distribution - * rule grouping VCPUs by socket so that VCPUs from the same socket - * would be on the same node. - */ - if (i == nb_numa_nodes) { - for (i = 0; i < max_cpus; i++) { - unsigned node_id = i % nb_numa_nodes; - if (mc->cpu_index_to_socket_id) { - node_id = mc->cpu_index_to_socket_id(i) % nb_numa_nodes; - } - - set_bit(i, numa_info[node_id].node_cpu); - } - } - - validate_numa_cpus(); - } else { - numa_set_mem_node_id(0, ram_size, 0); - } -} - -void numa_post_machine_init(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); - if (err) { - error_report_err(err); - if (mem_prealloc) { - exit(1); - } - - /* Legacy behavior: if allocation failed, fall back to - * regular RAM allocation. - */ - memory_region_init_ram(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(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 < MAX_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, - &error_fatal); - - 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 void numa_stat_memory_devices(uint64_t node_mem[]) -{ - MemoryDeviceInfoList *info_list = NULL; - MemoryDeviceInfoList **prev = &info_list; - MemoryDeviceInfoList *info; - - qmp_pc_dimm_device_list(qdev_get_machine(), &prev); - for (info = info_list; info; info = info->next) { - MemoryDeviceInfo *value = info->value; - - if (value) { - switch (value->type) { - case MEMORY_DEVICE_INFO_KIND_DIMM: - node_mem[value->u.dimm.data->node] += value->u.dimm.data->size; - break; - default: - break; - } - } - } - qapi_free_MemoryDeviceInfoList(info_list); -} - -void query_numa_node_mem(uint64_t 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] += 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->size = object_property_get_int(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; -} |