xen/PMU: Initialization code for Xen PMU

[firefly-linux-kernel-4.4.55.git] / include / xen / interface / xenpmu.h

diff --git a/include/xen/interface/xenpmu.h b/include/xen/interface/xenpmu.h
index eac1b498b89fd540f1094c07fc68c20747e05012..ca42301949b593e1ea9390e40a45c1acf8449812 100644 (file)
--- a/include/xen/interface/xenpmu.h
+++ b/include/xen/interface/xenpmu.h
@@ -56,4 +56,37 @@ struct xen_pmu_params {
  */
 #define XENPMU_FEATURE_INTEL_BTS  1
 
+/*
+ * Shared PMU data between hypervisor and PV(H) domains.
+ *
+ * The hypervisor fills out this structure during PMU interrupt and sends an
+ * interrupt to appropriate VCPU.
+ * Architecture-independent fields of xen_pmu_data are WO for the hypervisor
+ * and RO for the guest but some fields in xen_pmu_arch can be writable
+ * by both the hypervisor and the guest (see arch-$arch/pmu.h).
+ */
+struct xen_pmu_data {
+       /* Interrupted VCPU */
+       uint32_t vcpu_id;
+
+       /*
+        * Physical processor on which the interrupt occurred. On non-privileged
+        * guests set to vcpu_id;
+        */
+       uint32_t pcpu_id;
+
+       /*
+        * Domain that was interrupted. On non-privileged guests set to
+        * DOMID_SELF.
+        * On privileged guests can be DOMID_SELF, DOMID_XEN, or, when in
+        * XENPMU_MODE_ALL mode, domain ID of another domain.
+        */
+       domid_t  domain_id;
+
+       uint8_t pad[6];
+
+       /* Architecture-specific information */
+       struct xen_pmu_arch pmu;
+};
+
 #endif /* __XEN_PUBLIC_XENPMU_H__ */