diff --git a/python/llm/src/ipex_llm/transformers/xpu_ops.py b/python/llm/src/ipex_llm/transformers/xpu_ops.py
index 6ee00e1ce49..9b9c740ea1e 100644
--- a/python/llm/src/ipex_llm/transformers/xpu_ops.py
+++ b/python/llm/src/ipex_llm/transformers/xpu_ops.py
@@ -20,9 +20,9 @@
 import xe_addons
 
 
-@torch.library.register_fake("ipex_llm::forward_new")
-def _(x, weight, qtype, input_size):
-    return torch.empty_like(x)
+# @torch.library.register_fake("ipex_llm::forward_new")
+# def _(x, weight, qtype, input_size):
+#     return ???
 
 
 # @torch.library.register_fake("ipex_llm::dequant")
@@ -32,32 +32,38 @@ def _(x, weight, qtype, input_size):
 
 @torch.library.register_fake("ipex_llm::mlp_forward_xpu")
 def _(x, weight1, weight2, batch_size, state_size, output_size, act_type, qtype):
-    return torch.empty_like(x)
+    return torch.empty([batch_size, output_size],
+                       dtype=x.dtype, device=x.device)
 
 
-# @torch.library.register_fake("ipex_llm::rwkv_linear_attention_v4")
-# def _(time_decay, time_first, key, value, num_state, den_state, max_state)
-    # return ???
+@torch.library.register_fake("ipex_llm::rwkv_linear_attention_v4")
+def _(time_decay, time_first, key, value, num_state, den_state, max_state):
+    return torch.empty_like(key)
 
 
-# @torch.library.register_fake("ipex_llm::rwkv_linear_attention_v5")
-# def _(time_decay, time_first, receptance, key, value, state)
-    # return ???
+@torch.library.register_fake("ipex_llm::rwkv_linear_attention_v5")
+def _(time_decay, time_first, receptance, key, value, state):
+    bsz, n_heads, seq_len, head_dim = key.shape
+    return torch.empty([bsz, seq_len, n_heads, head_dim],
+                       dtype=key.dtype, device=key.device)
 
 
-# @torch.library.register_fake("ipex_llm::rwkv_time_shift")
-# def _(hidden, shifted, mix):
-    # return ???
+@torch.library.register_fake("ipex_llm::rwkv_time_shift")
+def _(hidden, shifted, mix):
+    bsz, seq_len, hidden_size = hidden.shape
+    return torch.empty([mix.size(0), bsz, seq_len, hidden_size],
+                       dtype=hidden.dtype, device=hidden.device)
 
 
-# @torch.library.register_fake("ipex_llm::dequantize_rows")
-# def _(x, weight, qtype, state_size, output_size):
-    # return ???
+@torch.library.register_fake("ipex_llm::dequantize_rows")
+def _(x, weight, qtype, state_size, output_size):
+    return torch.empty([x.size(0), x.size(1), state_size],
+                       dtype=torch.float, device=weight.device)
 
 
-@torch.library.register_fake("ipex_llm::batch_forward")
-def _(x, weight, qtype):
-    return torch.empty_like(x)
+# @torch.library.register_fake("ipex_llm::batch_forward")
+# def _(x, weight, qtype):
+#     return ???
 
 
 @torch.library.register_fake("ipex_llm::sdp")