skip flash attn ut on Hopper (#55148)

* skip flash attn ut on Hopper

* minor change

test/legacy_test/test_flash_attention.py

@@ -56,9 +56,25 @@ def attention_naive(q, k, v, causal=False):
     return paddle.transpose(o, [0, 2, 1, 3])
 
 
+is_sm75 = (
+    core.is_compiled_with_cuda()
+    and paddle.device.cuda.get_device_capability()[0] == 7
+    and paddle.device.cuda.get_device_capability()[1] == 5
+)
+is_sm8x = (
+    core.is_compiled_with_cuda()
+    and paddle.device.cuda.get_device_capability()[0] == 8
+    and paddle.device.cuda.get_device_capability()[1] >= 0
+)
+is_sm_supported = is_sm75 or is_sm8x
+
+
 @unittest.skipIf(
-    not core.is_compiled_with_cuda() or get_cuda_version() < 11030,
-    "core is not compiled with CUDA and cuda version need larger than or equal to 11.3",
+    not core.is_compiled_with_cuda()
+    or get_cuda_version() < 11030
+    or not is_sm_supported,
+    "core is not compiled with CUDA and cuda version need larger than or equal to 11.3"
+    "and device's compute capability must be 7.5 or 8.x",
 )
 class TestFlashAttentionAPI(unittest.TestCase):
     def setUp(self):