[Qemu-devel] [PATCH v5 03/17] target-i386: Add Hypervisor level.

[Don Slutz <Don@CloudSwitch.com>]

Also known as Paravirtualization level or maximim cpuid function present in this leaf.
This is just the EAX value for 0x40000000.

QEMU knows this is KVM_CPUID_SIGNATURE (0x40000000).

This is based on:

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

Linux kernel change starts with:
  http://fixunix.com/kernel/538707-use-cpuid-communicate-hypervisor.html
Also:
  http://lkml.indiana.edu/hypermail/linux/kernel/1205.0/00100.html

VMware documention on CPUIDs (Mechanisms to determine if software is
running in a VMware virtual machine):
  http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458

QEMU has the value HYPERV_CPUID_MIN defined.

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

diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 5265c5a..1899f69 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -777,11 +777,14 @@ typedef struct CPUX86State {
     uint32_t cpuid_ext3_features;
     uint32_t cpuid_apic_id;
     bool cpuid_vendor_override;
+    bool cpuid_hv_level_set;
     /* Store the results of Centaur's CPUID instructions */
     uint32_t cpuid_xlevel2;
     uint32_t cpuid_ext4_features;
     /* Flags from CPUID[EAX=7,ECX=0].EBX */
     uint32_t cpuid_7_0_ebx;
+    /* Hypervisor CPUIDs */
+    uint32_t cpuid_hv_level;
 
     /* MTRRs */
     uint64_t mtrr_fixed[11];
-- 
1.7.1