KVM: x86 emulator: add new ->wbinvd() callback

Instead of calling kvm_emulate_wbinvd() directly.
Signed-off-by: Avi Kivity <avi@redhat.com>

arch/x86/include/asm/kvm_emulate.h

@@ -187,6 +187,7 @@ struct x86_emulate_ops {
 	int (*set_msr)(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 data);
 	int (*get_msr)(struct x86_emulate_ctxt *ctxt, u32 msr_index, u64 *pdata);
 	void (*halt)(struct x86_emulate_ctxt *ctxt);
+	void (*wbinvd)(struct x86_emulate_ctxt *ctxt);
 	int (*fix_hypercall)(struct x86_emulate_ctxt *ctxt);
 	void (*get_fpu)(struct x86_emulate_ctxt *ctxt); /* disables preempt */
 	void (*put_fpu)(struct x86_emulate_ctxt *ctxt); /* reenables preempt */

arch/x86/kvm/emulate.c

@@ -4092,7 +4092,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
 		rc = em_clts(ctxt);
 		break;
 	case 0x09:		/* wbinvd */
-		kvm_emulate_wbinvd(ctxt->vcpu);
+		ctxt->ops->wbinvd(ctxt);
 		break;
 	case 0x08:		/* invd */
 	case 0x0d:		/* GrpP (prefetch) */

arch/x86/kvm/x86.c

@@ -4154,6 +4154,11 @@ int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu)
 }
 EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd);
 
+static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt)
+{
+	kvm_emulate_wbinvd(emul_to_vcpu(ctxt));
+}
+
 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
 {
 	return _kvm_get_dr(emul_to_vcpu(ctxt), dr, dest);
@@ -4408,6 +4413,7 @@ static struct x86_emulate_ops emulate_ops = {
 	.set_msr             = emulator_set_msr,
 	.get_msr             = emulator_get_msr,
 	.halt                = emulator_halt,
+	.wbinvd              = emulator_wbinvd,
 	.fix_hypercall       = emulator_fix_hypercall,
 	.get_fpu             = emulator_get_fpu,
 	.put_fpu             = emulator_put_fpu,