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plugins: add qemu_plugin_num_vcpus function

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We now keep track of how many vcpus were started. This way, a plugin can
easily query number of any vcpus at any point of execution, which
unifies user and system mode workflows.

Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240213094009.150349-3-pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240227144335.1196131-17-alex.bennee@linaro.org>
This commit is contained in:
Pierrick Bouvier 2024-02-27 14:43:22 +00:00 • committed by Alex Bennée
parent 926e146eff
commit 4a448b148c
5 changed files with 19 additions and 0 deletions
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6
plugins/core.c
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@ -213,6 +213,7 @@ void qemu_plugin_vcpu_init_hook(CPUState *cpu)
bool success;
qemu_rec_mutex_lock(&plugin.lock);
plugin.num_vcpus = MAX(plugin.num_vcpus, cpu->cpu_index + 1);
plugin_cpu_update__locked(&cpu->cpu_index, NULL, NULL);
success = g_hash_table_insert(plugin.cpu_ht, &cpu->cpu_index,
&cpu->cpu_index);
@ -570,3 +571,8 @@ static void __attribute__((__constructor__)) plugin_init(void)
QHT_MODE_AUTO_RESIZE);
atexit(qemu_plugin_atexit_cb);
}
int plugin_num_vcpus(void)
{
return plugin.num_vcpus;
}