1 files changed, 6 insertions, 0 deletions

diff --git a/arch/x86/include/asm/hyperv.h b/arch/x86/include/asm/hyperv.h
index e153a2b3889a..46040473e122 100644
--- a/arch/x86/include/asm/hyperv.h
+++ b/arch/x86/include/asm/hyperv.h
@@ -14,6 +14,9 @@
 #define HYPERV_CPUID_ENLIGHTMENT_INFO           0x40000004
 #define HYPERV_CPUID_IMPLEMENT_LIMITS           0x40000005
 
+#define HYPERV_HYPERVISOR_PRESENT_BIT           0x80000000
+#define HYPERV_CPUID_MIN                        0x40000005
+
 /*
  * Feature identification. EAX indicates which features are available
  * to the partition based upon the current partition privileges.
@@ -129,6 +132,9 @@
 /* MSR used to provide vcpu index */
 #define HV_X64_MSR_VP_INDEX                     0x40000002
 
+/* MSR used to read the per-partition time reference counter */
+#define HV_X64_MSR_TIME_REF_COUNT               0x40000020
+
 /* Define the virtual APIC registers */
 #define HV_X64_MSR_EOI                          0x40000070
 #define HV_X64_MSR_ICR                          0x40000071