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hw/core/machine-smp: Calculate total CPUs once in machine_parse_smp_config()

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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 <zhao1.liu@intel.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240308160148.3130837-4-zhao1.liu@linux.intel.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Zhao Liu 2024-03-09 00:01:38 +08:00 committed by Philippe Mathieu-Daudé
parent 54c4ea8f3a
commit 4503dcf77b
1 changed files with 4 additions and 4 deletions
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8
hw/core/machine-smp.c
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@ -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: "