KVM: VMX: Add missing CPU based VM execution controls to vmcs_config

As a preparation to reusing the result of setup_vmcs_config() in
nested VMX MSR setup, add the CPU based VM execution controls which KVM
doesn't use but supports for nVMX to KVM_OPT_VMX_CPU_BASED_VM_EXEC_CONTROL
and filter them out in vmx_exec_control().

No functional change intended.
Reviewed-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220830133737.1539624-27-vkuznets@redhat.comSigned-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/vmx/vmx.c

@@ -4326,6 +4326,15 @@ static u32 vmx_exec_control(struct vcpu_vmx *vmx)
 {
 	u32 exec_control = vmcs_config.cpu_based_exec_ctrl;
 
+	/*
+	 * Not used by KVM, but fully supported for nesting, i.e. are allowed in
+	 * vmcs12 and propagated to vmcs02 when set in vmcs12.
+	 */
+	exec_control &= ~(CPU_BASED_RDTSC_EXITING |
+			  CPU_BASED_USE_IO_BITMAPS |
+			  CPU_BASED_MONITOR_TRAP_FLAG |
+			  CPU_BASED_PAUSE_EXITING);
+
 	/* INTR_WINDOW_EXITING and NMI_WINDOW_EXITING are toggled dynamically */
 	exec_control &= ~(CPU_BASED_INTR_WINDOW_EXITING |
 			  CPU_BASED_NMI_WINDOW_EXITING);

arch/x86/kvm/vmx/vmx.h

@@ -549,9 +549,13 @@ static inline u8 vmx_get_rvi(void)
 #endif
 
 #define KVM_OPTIONAL_VMX_CPU_BASED_VM_EXEC_CONTROL			\
-	(CPU_BASED_TPR_SHADOW |						\
+	(CPU_BASED_RDTSC_EXITING |					\
+	 CPU_BASED_TPR_SHADOW |						\
+	 CPU_BASED_USE_IO_BITMAPS |					\
+	 CPU_BASED_MONITOR_TRAP_FLAG |					\
 	 CPU_BASED_USE_MSR_BITMAPS |					\
 	 CPU_BASED_NMI_WINDOW_EXITING |					\
+	 CPU_BASED_PAUSE_EXITING |					\
 	 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS |			\
 	 CPU_BASED_ACTIVATE_TERTIARY_CONTROLS)