++vcpu->stat.idle_exits;
trace_kvm_exit_idle(vcpu, KVM_TRACE_EXIT_IDLE);
- if (!kvm_arch_vcpu_runnable(vcpu)) {
- /*
- * Switch to the software timer before halt-polling/blocking as
- * the guest's timer may be a break event for the vCPU, and the
- * hypervisor timer runs only when the CPU is in guest mode.
- * Switch before halt-polling so that KVM recognizes an expired
- * timer before blocking.
- */
- kvm_save_timer(vcpu);
- kvm_vcpu_block(vcpu);
- }
+ if (!kvm_arch_vcpu_runnable(vcpu))
+ kvm_vcpu_halt(vcpu);
return EMULATE_DONE;
}
*/
hrtimer_cancel(&vcpu->arch.swtimer);
hrtimer_start(&vcpu->arch.swtimer, expire, HRTIMER_MODE_ABS_PINNED);
- } else
+ } else if (vcpu->stat.generic.blocking) {
/*
- * Inject timer interrupt so that hall polling can dectect and exit
+ * Inject timer interrupt so that halt polling can dectect and exit.
+ * VCPU is scheduled out already and sleeps in rcuwait queue and
+ * will not poll pending events again. kvm_queue_irq() is not enough,
+ * hrtimer swtimer should be used here.
*/
- kvm_queue_irq(vcpu, INT_TI);
+ expire = ktime_add_ns(ktime_get(), 10);
+ vcpu->arch.expire = expire;
+ hrtimer_start(&vcpu->arch.swtimer, expire, HRTIMER_MODE_ABS_PINNED);
+ }
}
/*
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
- return kvm_pending_timer(vcpu) ||
+ int ret;
+
+ /* Protect from TOD sync and vcpu_load/put() */
+ preempt_disable();
+ ret = kvm_pending_timer(vcpu) ||
kvm_read_hw_gcsr(LOONGARCH_CSR_ESTAT) & (1 << INT_TI);
+ preempt_enable();
+
+ return ret;
}
int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu)