[Qemu-devel] [PATCH v7 09/17] target-i386: Use x86_set_hyperv to set hypervisor features.

[Don Slutz <Don@CloudSwitch.com>]

Part of "target-i386: Add way to expose VMWare CPUID"

At this stage it is used to set the cpu object's hypervisor features
to the default for Microsoft's Hypervisor ("Hv#1").

Also known as kvm festures or Hypervisor vendor-neutral interface identification.
This is the EAX value for 0x40000001.

QEMU knows this is KVM_CPUID_FEATURES (0x40000001) in some builds.

This is based on:

Microsoft Hypervisor CPUID Leaves:
  http://msdn.microsoft.com/en-us/library/windows/hardware/ff542428%28v=vs.85%29.aspx

Signed-off-by: Don Slutz <Don@CloudSwitch.com>
---
 target-i386/cpu.c |    2 ++
 target-i386/cpu.h |    1 +
 2 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 958be81..f058add 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -1259,6 +1259,8 @@ static void x86_set_hyperv(Object *obj, Error **errp)
                             "hypervisor-level", errp);
     object_property_set_str(obj, CPUID_HV_VENDOR_HYPERV,
                             "hypervisor-vendor", errp);
+    object_property_set_int(obj, CPUID_HV_FEATURES_HYPERV,
+                            "hypervisor-features", errp);
 }
 
 static void x86_get_hv_spinlocks(Object *obj, Visitor *v, void *opaque,
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index f2045d6..9a34c7b 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -492,6 +492,7 @@
  * Microsoft hypervisors.  Is related to HYPERV_CPUID_MIN. */
 #define CPUID_HV_LEVEL_HYPERV_CPUID_MIN  0x40000005
 #define CPUID_HV_VENDOR_HYPERV "Microsoft Hv"
+#define CPUID_HV_FEATURES_HYPERV 0x31237648 /* "Hv#1" */
 
 #define CPUID_MWAIT_IBE     (1 << 1) /* Interrupts can exit capability */
 #define CPUID_MWAIT_EMX     (1 << 0) /* enumeration supported */
-- 
1.7.1