diff options
Diffstat (limited to 'target-ppc/kvm.c')
| -rw-r--r-- | target-ppc/kvm.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c index 2625cb8bd9..1079ce1e61 100644 --- a/target-ppc/kvm.c +++ b/target-ppc/kvm.c @@ -37,20 +37,20 @@ 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. +/* XXX We have a race condition where we actually have a level triggered + * interrupt, but the infrastructure can't expose that yet, so the guest + * takes but ignores 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. + * As a quick workaround, let's just wake up again 20 ms after we injected + * an interrupt. That way we can assure that we're always reinjecting + * interrupts in case the guest swallowed them. */ static QEMUTimer *idle_timer; -static void do_nothing(void *opaque) +static void kvm_kick_env(void *env) { - qemu_mod_timer(idle_timer, qemu_get_clock(vm_clock) + - (get_ticks_per_sec() / 2)); + qemu_cpu_kick(env); } int kvm_arch_init(KVMState *s, int smp_cpus) @@ -66,6 +66,8 @@ int kvm_arch_init_vcpu(CPUState *cenv) sregs.pvr = cenv->spr[SPR_PVR]; ret = kvm_vcpu_ioctl(cenv, KVM_SET_SREGS, &sregs); + idle_timer = qemu_new_timer(vm_clock, kvm_kick_env, cenv); + return ret; } @@ -189,12 +191,6 @@ 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 && @@ -211,6 +207,10 @@ int kvm_arch_pre_run(CPUState *env, struct kvm_run *run) r = kvm_vcpu_ioctl(env, KVM_INTERRUPT, &irq); if (r < 0) printf("cpu %d fail inject %x\n", env->cpu_index, irq); + + /* Always wake up soon in case the interrupt was level based */ + qemu_mod_timer(idle_timer, qemu_get_clock(vm_clock) + + (get_ticks_per_sec() / 50)); } /* We don't know if there are more interrupts pending after this. However, |