KVM: nVMX: include conditional controls in /dev/kvm KVM_GET_MSRS

Some secondary controls are automatically enabled/disabled based on the CPUID
values that are set for the guest.  However, they are still available at a
global level and therefore should be present when KVM_GET_MSRS is sent to
/dev/kvm.

Fixes: 1389309 ("KVM: nVMX: expose VMX capabilities for nested hypervisors to userspace", 2018-02-26)
Reviewed-by: Liran Alon <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
(cherry picked from commit 6defc59)

Orabug: 31699256

Conflicts:
	arch/x86/kvm/vmx/nested.c
	This file was split out later from arch/x86/kvm/vmx.c.

Signed-off-by: Maciej S. Szmigiero <[email protected]>
Reviewed-by: David Edmondson <[email protected]>
Reviewed-by: Mihai Carabas <[email protected]>
Signed-off-by: Somasundaram Krishnasamy <[email protected]>

Author: bonzini

arch/x86/kvm/vmx.c

@@ -3658,10 +3658,15 @@ static void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, bool apicv)
 	msrs->secondary_ctls_low = 0;
 	msrs->secondary_ctls_high &=
 		SECONDARY_EXEC_DESC |
+		SECONDARY_EXEC_RDTSCP |
 		SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE |
+		SECONDARY_EXEC_WBINVD_EXITING |
 		SECONDARY_EXEC_APIC_REGISTER_VIRT |
 		SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY |
-		SECONDARY_EXEC_WBINVD_EXITING;
+		SECONDARY_EXEC_RDRAND_EXITING |
+		SECONDARY_EXEC_ENABLE_INVPCID |
+		SECONDARY_EXEC_RDSEED_EXITING |
+		SECONDARY_EXEC_XSAVES;
 
 	/*
 	 * We can emulate "VMCS shadowing," even if the hardware