KVM: halt_polling: provide a way to qualify wakeups during poll

[karo-tx-linux.git] / include / linux / kvm_host.h

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index ad40d44784c7e7a122cd0aef879a5883a7e340ae..bbcd921d7cb0155a897e74543975624cdc511f70 100644 (file)
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -35,6 +35,10 @@
 
 #include <asm/kvm_host.h>
 
+#ifndef KVM_MAX_VCPU_ID
+#define KVM_MAX_VCPU_ID KVM_MAX_VCPUS
+#endif
+
 /*
  * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
  * in kvm, other bits are visible for userspace which are defined in
@@ -225,6 +229,7 @@ struct kvm_vcpu {
        sigset_t sigset;
        struct kvm_vcpu_stat stat;
        unsigned int halt_poll_ns;
+       bool valid_wakeup;
 
 #ifdef CONFIG_HAS_IOMEM
        int mmio_needed;
@@ -447,12 +452,13 @@ static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
 
 static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
 {
-       struct kvm_vcpu *vcpu;
+       struct kvm_vcpu *vcpu = NULL;
        int i;
 
-       if (id < 0 || id >= KVM_MAX_VCPUS)
+       if (id < 0)
                return NULL;
-       vcpu = kvm_get_vcpu(kvm, id);
+       if (id < KVM_MAX_VCPUS)
+               vcpu = kvm_get_vcpu(kvm, id);
        if (vcpu && vcpu->vcpu_id == id)
                return vcpu;
        kvm_for_each_vcpu(i, vcpu, kvm)
@@ -1180,6 +1186,7 @@ static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
 #endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
 
 #ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
+bool kvm_arch_has_irq_bypass(void);
 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *,
                           struct irq_bypass_producer *);
 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *,
@@ -1190,4 +1197,18 @@ int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,
                                  uint32_t guest_irq, bool set);
 #endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */
 
+#ifdef CONFIG_HAVE_KVM_INVALID_WAKEUPS
+/* If we wakeup during the poll time, was it a sucessful poll? */
+static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
+{
+       return vcpu->valid_wakeup;
+}
+
+#else
+static inline bool vcpu_valid_wakeup(struct kvm_vcpu *vcpu)
+{
+       return true;
+}
+#endif /* CONFIG_HAVE_KVM_INVALID_WAKEUPS */
+
 #endif