In order to perform critical manipulations on the VM state in the
context of a VCPU, specifically code patching, stopping and resuming of
all VCPUs may be necessary. resume_all_vcpus is already compatible, now
enable pause_all_vcpus for this use case by stopping the calling context
before starting to wait for the whole gang.
CC: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
penv = penv->next_cpu;
}
+ if (!qemu_thread_is_self(&io_thread)) {
+ cpu_stop_current();
+ if (!kvm_enabled()) {
+ while (penv) {
+ penv->stop = 0;
+ penv->stopped = 1;
+ penv = penv->next_cpu;
+ }
+ return;
+ }
+ }
+
while (!all_vcpus_paused()) {
qemu_cond_wait(&qemu_pause_cond, &qemu_global_mutex);
penv = first_cpu;