diff options
| -rw-r--r-- | target-ppc/kvm.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c index 9886b54..8ad0037 100644 --- a/target-ppc/kvm.c +++ b/target-ppc/kvm.c @@ -37,6 +37,22 @@ do { } while (0) #endif +/* XXX For some odd reason we sometimes hang inside KVM forever. I'd guess it's + * a race condition where we actually have a level triggered interrupt, but + * the infrastructure can't expose that yet, so the guest ACKs it, goes to + * sleep and never gets notified that there's still an interrupt pending. + * + * As a quick workaround, let's just wake up every 500 ms. That way we can + * assure that we're always reinjecting interrupts in time. + */ +static QEMUTimer *idle_timer; + +static void do_nothing(void *opaque) +{ + qemu_mod_timer(idle_timer, qemu_get_clock(vm_clock) + + (get_ticks_per_sec() / 2)); +} + int kvm_arch_init(KVMState *s, int smp_cpus) { return 0; @@ -173,6 +189,12 @@ int kvm_arch_pre_run(CPUState *env, struct kvm_run *run) int r; unsigned irq; + if (!idle_timer) { + idle_timer = qemu_new_timer(vm_clock, do_nothing, NULL); + qemu_mod_timer(idle_timer, qemu_get_clock(vm_clock) + + (get_ticks_per_sec() / 2)); + } + /* PowerPC Qemu tracks the various core input pins (interrupt, critical * interrupt, reset, etc) in PPC-specific env->irq_input_state. */ if (run->ready_for_interrupt_injection && |