From: Pierrick Bouvier Date: Tue, 27 Feb 2024 14:43:23 +0000 (+0000) Subject: plugins: fix order of init/idle/resume callback X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c490e681ecce6d035fb67f02c2b674ab62a667f6;p=qemu.git plugins: fix order of init/idle/resume callback We found that vcpu_init_hook was called *after* idle callback. vcpu_init is called from cpu_realize_fn, while idle/resume cb are called from qemu_wait_io_event (in vcpu thread). This change ensures we only call idle and resume cb only once a plugin was init for a given vcpu. Next change in the series will run vcpu_init asynchronously, which will make it run *after* resume callback as well. So we fix this now. Reviewed-by: Richard Henderson Signed-off-by: Pierrick Bouvier Message-Id: <20240213094009.150349-4-pierrick.bouvier@linaro.org> Signed-off-by: Alex Bennée Message-Id: <20240227144335.1196131-18-alex.bennee@linaro.org> --- diff --git a/plugins/core.c b/plugins/core.c index caa6631135..2392bbb888 100644 --- a/plugins/core.c +++ b/plugins/core.c @@ -391,12 +391,17 @@ void qemu_plugin_vcpu_syscall_ret(CPUState *cpu, int64_t num, int64_t ret) void qemu_plugin_vcpu_idle_cb(CPUState *cpu) { - plugin_vcpu_cb__simple(cpu, QEMU_PLUGIN_EV_VCPU_IDLE); + /* idle and resume cb may be called before init, ignore in this case */ + if (cpu->cpu_index < plugin.num_vcpus) { + plugin_vcpu_cb__simple(cpu, QEMU_PLUGIN_EV_VCPU_IDLE); + } } void qemu_plugin_vcpu_resume_cb(CPUState *cpu) { - plugin_vcpu_cb__simple(cpu, QEMU_PLUGIN_EV_VCPU_RESUME); + if (cpu->cpu_index < plugin.num_vcpus) { + plugin_vcpu_cb__simple(cpu, QEMU_PLUGIN_EV_VCPU_RESUME); + } } void qemu_plugin_register_vcpu_idle_cb(qemu_plugin_id_t id,