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 <d...@cloudswitch.com> --- target-i386/cpu.h | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/target-i386/cpu.h b/target-i386/cpu.h index 5265c5a..05c0848 100644 --- a/target-i386/cpu.h +++ b/target-i386/cpu.h @@ -782,6 +782,8 @@ typedef struct CPUX86State { 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
