KVM: x86/xen: Add support for vCPU runstate information

[sfrench/cifs-2.6.git] / arch / x86 / kvm / xen.h

diff --git a/arch/x86/kvm/xen.h b/arch/x86/kvm/xen.h
index 87eaf2be954957186039e2f397d19031eaf61202..463a7844a8caeb42e2e37a323ae8bcb2f40ef1d9 100644 (file)
--- a/arch/x86/kvm/xen.h
+++ b/arch/x86/kvm/xen.h
@@ -23,6 +23,12 @@ int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data);
 int kvm_xen_hvm_config(struct kvm *kvm, struct kvm_xen_hvm_config *xhc);
 void kvm_xen_destroy_vm(struct kvm *kvm);
 
+static inline bool kvm_xen_msr_enabled(struct kvm *kvm)
+{
+       return static_branch_unlikely(&kvm_xen_enabled.key) &&
+               kvm->arch.xen_hvm_config.msr;
+}
+
 static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
 {
        return static_branch_unlikely(&kvm_xen_enabled.key) &&
@@ -48,6 +54,11 @@ static inline void kvm_xen_destroy_vm(struct kvm *kvm)
 {
 }
 
+static inline bool kvm_xen_msr_enabled(struct kvm *kvm)
+{
+       return false;
+}
+
 static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
 {
        return false;
@@ -61,10 +72,31 @@ static inline int kvm_xen_has_interrupt(struct kvm_vcpu *vcpu)
 
 int kvm_xen_hypercall(struct kvm_vcpu *vcpu);
 
-/* 32-bit compatibility definitions, also used natively in 32-bit build */
 #include <asm/pvclock-abi.h>
 #include <asm/xen/interface.h>
+#include <xen/interface/vcpu.h>
 
+void kvm_xen_update_runstate_guest(struct kvm_vcpu *vcpu, int state);
+
+static inline void kvm_xen_runstate_set_running(struct kvm_vcpu *vcpu)
+{
+       kvm_xen_update_runstate_guest(vcpu, RUNSTATE_running);
+}
+
+static inline void kvm_xen_runstate_set_preempted(struct kvm_vcpu *vcpu)
+{
+       /*
+        * If the vCPU wasn't preempted but took a normal exit for
+        * some reason (hypercalls, I/O, etc.), that is accounted as
+        * still RUNSTATE_running, as the VMM is still operating on
+        * behalf of the vCPU. Only if the VMM does actually block
+        * does it need to enter RUNSTATE_blocked.
+        */
+       if (vcpu->preempted)
+               kvm_xen_update_runstate_guest(vcpu, RUNSTATE_runnable);
+}
+
+/* 32-bit compatibility definitions, also used natively in 32-bit build */
 struct compat_arch_vcpu_info {
        unsigned int cr2;
        unsigned int pad[5];
@@ -97,4 +129,10 @@ struct compat_shared_info {
        struct compat_arch_shared_info arch;
 };
 
+struct compat_vcpu_runstate_info {
+    int state;
+    uint64_t state_entry_time;
+    uint64_t time[4];
+} __attribute__((packed));
+
 #endif /* __ARCH_X86_KVM_XEN_H__ */