On 8/8/23 01:01, Ackerley Tng wrote:
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 75d48379d94d..a1a28dd77b94 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6351,7 +6351,14 @@ static int kvm_vm_move_enc_context_from(struct kvm *kvm, unsigned int source_fd)
if (r)
goto out_mark_migration_done;
- r = static_call(kvm_x86_vm_move_enc_context_from)(kvm, source_kvm);
+ /*
+ * Different types of VMs will allow userspace to define if moving
+ * encryption context should be supported.
+ */
+ if (kvm->arch.vm_move_enc_ctxt_supported &&
+ kvm_x86_ops.vm_move_enc_context_from) {
+ r = static_call(kvm_x86_vm_move_enc_context_from)(kvm, source_kvm);
+ }
Rather than "supported" this is more "required". So perhaps
kvm->arch.use_vm_enc_ctxt_op?
Paolo
