KVM: Remove pointer to rflags from realmode_set_cr parameters.

Mov reg, cr instruction doesn't change flags in any meaningful way, so
no need to update rflags after instruction execution.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

arch/x86/include/asm/kvm_host.h

@@ -587,8 +587,7 @@ void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
 		   unsigned long *rflags);
 
 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
-void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
-		     unsigned long *rflags);
+void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value);
 void kvm_enable_efer_bits(u64);
 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);

arch/x86/kvm/emulate.c

@@ -2534,8 +2534,7 @@ twobyte_insn:
 	case 0x22: /* mov reg, cr */
 		if (c->modrm_mod != 3)
 			goto cannot_emulate;
-		realmode_set_cr(ctxt->vcpu,
-				c->modrm_reg, c->modrm_val, &ctxt->eflags);
+		realmode_set_cr(ctxt->vcpu, c->modrm_reg, c->modrm_val);
 		c->dst.type = OP_NONE;
 		break;
 	case 0x23: /* mov from reg to dr */

arch/x86/kvm/x86.c

@@ -4080,13 +4080,11 @@ unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
 	return value;
 }
 
-void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
-		     unsigned long *rflags)
+void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val)
 {
 	switch (cr) {
 	case 0:
 		kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val));
-		*rflags = kvm_get_rflags(vcpu);
 		break;
 	case 2:
 		vcpu->arch.cr2 = val;