KVM: x86: Advertise HYPERVISOR in KVM_GET_SUPPORTED_CPUID

Unconditionally advertise "support" for the HYPERVISOR feature in CPUID,
as the flag simply communicates to the guest that's it's running under a
hypervisor.

Reviewed-by: Maxim Levitsky <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sean Christopherson <[email protected]>

Author: sean-jc

arch/x86/kvm/cpuid.c

@@ -743,7 +743,8 @@ void kvm_set_cpu_caps(void)
 		0 /* OSXSAVE */ |
 		F(AVX) |
 		F(F16C) |
-		F(RDRAND)
+		F(RDRAND) |
+		EMULATED_F(HYPERVISOR)
 	);
 
 	kvm_cpu_cap_init(CPUID_1_EDX,