KVM: Bury kvm_{en,dis}able_virtualization() in kvm_main.c once more

Now that TDX handles doing VMXON without KVM's involvement, bury the
top-level APIs to enable and disable virtualization back in kvm_main.c.

No functional change intended.

Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Chao Gao <chao.gao@intel.com>
Tested-by: Chao Gao <chao.gao@intel.com>
Tested-by: Sagi Shahar <sagis@google.com>
Link: https://patch.msgid.link/20260214012702.2368778-16-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

1 files changed, 13 insertions, 4 deletions

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index d27bf2488b12..a9ccf9a1c41e 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1102,6 +1102,9 @@ static inline struct kvm_io_bus *kvm_get_bus_for_destruction(struct kvm *kvm,
 					 !refcount_read(&kvm->users_count));
 }
 
+static int kvm_enable_virtualization(void);
+static void kvm_disable_virtualization(void);
+
 static struct kvm *kvm_create_vm(unsigned long type, const char *fdname)
 {
 	struct kvm *kvm = kvm_arch_alloc_vm();
@@ -5689,7 +5692,7 @@ static struct syscore kvm_syscore = {
 	.ops = &kvm_syscore_ops,
 };
 
-int kvm_enable_virtualization(void)
+static int kvm_enable_virtualization(void)
 {
 	int r;
 
@@ -5734,9 +5737,8 @@ err_cpuhp:
 	--kvm_usage_count;
 	return r;
 }
-EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_enable_virtualization);
 
-void kvm_disable_virtualization(void)
+static void kvm_disable_virtualization(void)
 {
 	guard(mutex)(&kvm_usage_lock);
 
@@ -5747,7 +5749,6 @@ void kvm_disable_virtualization(void)
 	cpuhp_remove_state(CPUHP_AP_KVM_ONLINE);
 	kvm_arch_disable_virtualization();
 }
-EXPORT_SYMBOL_FOR_KVM_INTERNAL(kvm_disable_virtualization);
 
 static int kvm_init_virtualization(void)
 {
@@ -5763,6 +5764,14 @@ static void kvm_uninit_virtualization(void)
 		kvm_disable_virtualization();
 }
 #else /* CONFIG_KVM_GENERIC_HARDWARE_ENABLING */
+static int kvm_enable_virtualization(void)
+{
+	return 0;
+}
+static void kvm_disable_virtualization(void)
+{
+
+}
 static int kvm_init_virtualization(void)
 {
 	return 0;