diff options
Diffstat (limited to 'hw/core/machine.c')
| -rw-r--r-- | hw/core/machine.c | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/hw/core/machine.c b/hw/core/machine.c index b8d95eec32..dc15f5f9e5 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -749,165 +749,6 @@ void machine_set_cpu_numa_node(MachineState *machine, } } -/* - * Report information of a machine's supported CPU topology hierarchy. - * Topology members will be ordered from the largest to the smallest - * in the string. - */ -static char *cpu_hierarchy_to_string(MachineState *ms) -{ - MachineClass *mc = MACHINE_GET_CLASS(ms); - GString *s = g_string_new(NULL); - - g_string_append_printf(s, "sockets (%u)", ms->smp.sockets); - - if (mc->smp_props.dies_supported) { - g_string_append_printf(s, " * dies (%u)", ms->smp.dies); - } - - g_string_append_printf(s, " * cores (%u)", ms->smp.cores); - g_string_append_printf(s, " * threads (%u)", ms->smp.threads); - - return g_string_free(s, false); -} - -/* - * smp_parse - Generic function used to parse the given SMP configuration - * - * Any missing parameter in "cpus/maxcpus/sockets/cores/threads" will be - * automatically computed based on the provided ones. - * - * In the calculation of omitted sockets/cores/threads: we prefer sockets - * over cores over threads before 6.2, while preferring cores over sockets - * over threads since 6.2. - * - * In the calculation of cpus/maxcpus: When both maxcpus and cpus are omitted, - * maxcpus will be computed from the given parameters and cpus will be set - * equal to maxcpus. When only one of maxcpus and cpus is given then the - * omitted one will be set to its given counterpart's value. Both maxcpus and - * cpus may be specified, but maxcpus must be equal to or greater than cpus. - * - * For compatibility, apart from the parameters that will be computed, newly - * introduced topology members which are likely to be target specific should - * be directly set as 1 if they are omitted (e.g. dies for PC since 4.1). - */ -static void smp_parse(MachineState *ms, SMPConfiguration *config, Error **errp) -{ - MachineClass *mc = MACHINE_GET_CLASS(ms); - unsigned cpus = config->has_cpus ? config->cpus : 0; - unsigned sockets = config->has_sockets ? config->sockets : 0; - unsigned dies = config->has_dies ? config->dies : 0; - unsigned cores = config->has_cores ? config->cores : 0; - unsigned threads = config->has_threads ? config->threads : 0; - unsigned maxcpus = config->has_maxcpus ? config->maxcpus : 0; - - /* - * Specified CPU topology parameters must be greater than zero, - * explicit configuration like "cpus=0" is not allowed. - */ - if ((config->has_cpus && config->cpus == 0) || - (config->has_sockets && config->sockets == 0) || - (config->has_dies && config->dies == 0) || - (config->has_cores && config->cores == 0) || - (config->has_threads && config->threads == 0) || - (config->has_maxcpus && config->maxcpus == 0)) { - warn_report("Deprecated CPU topology (considered invalid): " - "CPU topology parameters must be greater than zero"); - } - - /* - * If not supported by the machine, a topology parameter must be - * omitted or specified equal to 1. - */ - if (!mc->smp_props.dies_supported && dies > 1) { - error_setg(errp, "dies not supported by this machine's CPU topology"); - return; - } - - dies = dies > 0 ? dies : 1; - - /* compute missing values based on the provided ones */ - if (cpus == 0 && maxcpus == 0) { - sockets = sockets > 0 ? sockets : 1; - cores = cores > 0 ? cores : 1; - threads = threads > 0 ? threads : 1; - } else { - maxcpus = maxcpus > 0 ? maxcpus : cpus; - - if (mc->smp_props.prefer_sockets) { - /* prefer sockets over cores before 6.2 */ - if (sockets == 0) { - cores = cores > 0 ? cores : 1; - threads = threads > 0 ? threads : 1; - sockets = maxcpus / (dies * cores * threads); - } else if (cores == 0) { - threads = threads > 0 ? threads : 1; - cores = maxcpus / (sockets * dies * threads); - } - } else { - /* prefer cores over sockets since 6.2 */ - if (cores == 0) { - sockets = sockets > 0 ? sockets : 1; - threads = threads > 0 ? threads : 1; - cores = maxcpus / (sockets * dies * threads); - } else if (sockets == 0) { - threads = threads > 0 ? threads : 1; - sockets = maxcpus / (dies * cores * threads); - } - } - - /* try to calculate omitted threads at last */ - if (threads == 0) { - threads = maxcpus / (sockets * dies * cores); - } - } - - maxcpus = maxcpus > 0 ? maxcpus : sockets * dies * cores * threads; - cpus = cpus > 0 ? cpus : maxcpus; - - ms->smp.cpus = cpus; - ms->smp.sockets = sockets; - ms->smp.dies = dies; - ms->smp.cores = cores; - ms->smp.threads = threads; - ms->smp.max_cpus = maxcpus; - - /* sanity-check of the computed topology */ - if (sockets * dies * cores * threads != maxcpus) { - g_autofree char *topo_msg = cpu_hierarchy_to_string(ms); - error_setg(errp, "Invalid CPU topology: " - "product of the hierarchy must match maxcpus: " - "%s != maxcpus (%u)", - topo_msg, maxcpus); - return; - } - - if (maxcpus < cpus) { - g_autofree char *topo_msg = cpu_hierarchy_to_string(ms); - error_setg(errp, "Invalid CPU topology: " - "maxcpus must be equal to or greater than smp: " - "%s == maxcpus (%u) < smp_cpus (%u)", - topo_msg, maxcpus, cpus); - return; - } - - if (ms->smp.cpus < mc->min_cpus) { - error_setg(errp, "Invalid SMP CPUs %d. The min CPUs " - "supported by machine '%s' is %d", - ms->smp.cpus, - mc->name, mc->min_cpus); - return; - } - - if (ms->smp.max_cpus > mc->max_cpus) { - error_setg(errp, "Invalid SMP CPUs %d. The max CPUs " - "supported by machine '%s' is %d", - ms->smp.max_cpus, - mc->name, mc->max_cpus); - return; - } -} - static void machine_get_smp(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { |