+static int check_perm_in(struct x86_emulate_ctxt *ctxt)
+{
+ struct decode_cache *c = &ctxt->decode;
+
+ c->dst.bytes = min(c->dst.bytes, 4u);
+ if (!emulator_io_permited(ctxt, ctxt->ops, c->src.val, c->dst.bytes))
+ return emulate_gp(ctxt, 0);
+
+ return X86EMUL_CONTINUE;
+}
+
+static int check_perm_out(struct x86_emulate_ctxt *ctxt)
+{
+ struct decode_cache *c = &ctxt->decode;
+
+ c->src.bytes = min(c->src.bytes, 4u);
+ if (!emulator_io_permited(ctxt, ctxt->ops, c->dst.val, c->src.bytes))
+ return emulate_gp(ctxt, 0);
+
+ return X86EMUL_CONTINUE;
+}
+