KVM: Add "exiting guest mode" state

[pandora-kernel.git] / include / linux / kvm_host.h

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index b5021db..b99eacd 100644 (file)
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -98,19 +98,26 @@ int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
 #endif
 
+enum {
+       OUTSIDE_GUEST_MODE,
+       IN_GUEST_MODE,
+       EXITING_GUEST_MODE
+};
+
 struct kvm_vcpu {
        struct kvm *kvm;
 #ifdef CONFIG_PREEMPT_NOTIFIERS
        struct preempt_notifier preempt_notifier;
 #endif
+       int cpu;
        int vcpu_id;
-       struct mutex mutex;
-       int   cpu;
-       atomic_t guest_mode;
-       struct kvm_run *run;
+       int srcu_idx;
+       int mode;
        unsigned long requests;
        unsigned long guest_debug;
-       int srcu_idx;
+
+       struct mutex mutex;
+       struct kvm_run *run;
 
        int fpu_active;
        int guest_fpu_loaded, guest_xcr0_loaded;
@@ -140,6 +147,11 @@ struct kvm_vcpu {
        struct kvm_vcpu_arch arch;
 };
 
+static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
+{
+       return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
+}
+
 /*
  * Some of the bitops functions do not support too long bitmaps.
  * This number must be determined not to exceed such limits.