KVM: x86 emulator: add ->fix_hypercall() callback

Artificial, but needed to remove direct calls to KVM.

Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 2246cf1..4a2b40e 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -152,6 +152,8 @@
 
 u64 __read_mostly host_xcr0;
 
+int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt);
+
 static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu)
 {
 	int i;
@@ -4406,6 +4408,7 @@
 	.set_msr             = emulator_set_msr,
 	.get_msr             = emulator_get_msr,
 	.halt                = emulator_halt,
+	.fix_hypercall       = emulator_fix_hypercall,
 	.get_fpu             = emulator_get_fpu,
 	.put_fpu             = emulator_put_fpu,
 	.intercept           = emulator_intercept,
@@ -5042,8 +5045,9 @@
 }
 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
 
-int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
+int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt)
 {
+	struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
 	char instruction[3];
 	unsigned long rip = kvm_rip_read(vcpu);