From 4503dcf77b9006b56dba01a407bffbb9a37ea38e Mon Sep 17 00:00:00 2001 From: Zhao Liu Date: Sat, 9 Mar 2024 00:01:38 +0800 Subject: [PATCH] hw/core/machine-smp: Calculate total CPUs once in machine_parse_smp_config() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In machine_parse_smp_config(), the number of total CPUs is calculated by: drawers * books * sockets * dies * clusters * cores * threads To avoid missing the future new topology level, use a local variable to cache the calculation result so that total CPUs are only calculated once. Signed-off-by: Zhao Liu Reviewed-by: Philippe Mathieu-Daudé Message-ID: <20240308160148.3130837-4-zhao1.liu@linux.intel.com> Signed-off-by: Philippe Mathieu-Daudé --- hw/core/machine-smp.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/hw/core/machine-smp.c b/hw/core/machine-smp.c index 50a5a40dbc..27864c9507 100644 --- a/hw/core/machine-smp.c +++ b/hw/core/machine-smp.c @@ -91,6 +91,7 @@ void machine_parse_smp_config(MachineState *ms, unsigned cores = config->has_cores ? config->cores : 0; unsigned threads = config->has_threads ? config->threads : 0; unsigned maxcpus = config->has_maxcpus ? config->maxcpus : 0; + unsigned total_cpus; /* * Specified CPU topology parameters must be greater than zero, @@ -211,8 +212,8 @@ void machine_parse_smp_config(MachineState *ms, } } - maxcpus = maxcpus > 0 ? maxcpus : drawers * books * sockets * dies * - clusters * cores * threads; + total_cpus = drawers * books * sockets * dies * clusters * cores * threads; + maxcpus = maxcpus > 0 ? maxcpus : total_cpus; cpus = cpus > 0 ? cpus : maxcpus; ms->smp.cpus = cpus; @@ -228,8 +229,7 @@ void machine_parse_smp_config(MachineState *ms, mc->smp_props.has_clusters = config->has_clusters; /* sanity-check of the computed topology */ - if (drawers * books * sockets * dies * clusters * cores * threads != - maxcpus) { + if (total_cpus != maxcpus) { g_autofree char *topo_msg = cpu_hierarchy_to_string(ms); error_setg(errp, "Invalid CPU topology: " "product of the hierarchy must match maxcpus: "