x86: Detect running on a Microsoft HyperV system

[firefly-linux-kernel-4.4.55.git] / arch / x86 / include / asm / hyperv.h

diff --git a/arch/x86/include/asm/hyperv.h b/arch/x86/include/asm/hyperv.h
index e153a2b3889adff99966ce1bc1f0c8995f33eac1..46040473e122a46dc9eae9196021020d634319b4 100644 (file)
--- 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