Le ven. 28 août 2020 20:04, Richard Henderson <[email protected]> a écrit :
> Do not set parallel_cpus if there is only one cpu instantiated. > This will allow tcg to use serial code to implement atomics. > > Signed-off-by: Richard Henderson <[email protected]> > Reviewed-by: Philippe Mathieu-Daudé <[email protected]> --- > softmmu/cpus.c | 11 ++++++++++- > 1 file changed, 10 insertions(+), 1 deletion(-) > > diff --git a/softmmu/cpus.c b/softmmu/cpus.c > index a802e899ab..e3b98065c9 100644 > --- a/softmmu/cpus.c > +++ b/softmmu/cpus.c > @@ -1895,6 +1895,16 @@ static void qemu_tcg_init_vcpu(CPUState *cpu) > if (!tcg_region_inited) { > tcg_region_inited = 1; > tcg_region_init(); > + /* > + * If MTTCG, and we will create multiple cpus, > + * then we will have cpus running in parallel. > + */ > + if (qemu_tcg_mttcg_enabled()) { > + MachineState *ms = MACHINE(qdev_get_machine()); > + if (ms->smp.max_cpus > 1) { > + parallel_cpus = true; > + } > + } > } > > if (qemu_tcg_mttcg_enabled() || !single_tcg_cpu_thread) { > @@ -1904,7 +1914,6 @@ static void qemu_tcg_init_vcpu(CPUState *cpu) > > if (qemu_tcg_mttcg_enabled()) { > /* create a thread per vCPU with TCG (MTTCG) */ > - parallel_cpus = true; > snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/TCG", > cpu->cpu_index); > > -- > 2.25.1 > > >
