From 0b6bbe45d64577120e2a43913503558086a7a522 Mon Sep 17 00:00:00 2001
From: Qianfeng Zhang <Qianfeng.Zhang@amd.com>
Date: Tue, 21 Apr 2026 15:35:03 +0000
Subject: [PATCH] Remove exposing kUseTrLoad as template parameter of pipeline
 problem

---
 ...stu_attention_batched_forward_dispatch.hpp |  7 +-
 ...ntion_batched_forward_splitkv_dispatch.hpp |  7 +-
 .../hstu_attention_fwd_kernel.hpp             |  4 +-
 .../hstu_attention_fwd_pipeline_policy.hpp    | 86 ++++++++-----------
 .../hstu_attention_fwd_splitkv_kernel.hpp     |  4 +-
 .../hstu_attention_group_forward_dispatch.hpp |  7 +-
 ...tention_group_forward_splitkv_dispatch.hpp |  7 +-
 ...hstu_attention_jagged_forward_dispatch.hpp |  7 +-
 ...ention_jagged_forward_splitkv_dispatch.hpp |  7 +-
 ...hstu_attention_no_softmax_fwd_pipeline.hpp |  2 -
 ...tention_no_softmax_fwd_trload_pipeline.hpp | 37 ++++----
 .../hstu_attention_pipeline_problem.hpp       |  4 -
 .../18_hstu_attention/hstu_attention_util.hpp | 26 ++++++
 ...tu_attention_with_softmax_fwd_pipeline.hpp |  2 -
 ...ntion_with_softmax_fwd_trload_pipeline.hpp | 38 ++++----
 15 files changed, 129 insertions(+), 116 deletions(-)

diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_batched_forward_dispatch.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_batched_forward_dispatch.hpp
index 25679561a1..814c3af0d1 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_batched_forward_dispatch.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_batched_forward_dispatch.hpp
@@ -39,9 +39,9 @@ struct batched_forward_causal_softmax_bias_dropout_dispatch
                                     HstuAttentionNoSoftmaxFwdTileSetting<MaxK, MTile>>::Type;
 
 #ifdef BUILD_HSTU_FOR_GFX95_ONLY
-    static constexpr bool kUseTrLoad = true;
+    static constexpr bool use_trload_pipeline = true;
 #else
-    static constexpr bool kUseTrLoad = false;
+    static constexpr bool use_trload_pipeline = false;
 #endif
 
     template <bool kIsCrossAttention>
@@ -57,7 +57,6 @@ struct batched_forward_causal_softmax_bias_dropout_dispatch
         kHasDropout,
         kUseCausal,
         kUseSoftmax,
-        kUseTrLoad,
         HstuAttentionTileSetting>;
 
     static void Run(HstuAttentionNoGroupFwdParams& param, hipStream_t stream)
@@ -96,7 +95,7 @@ struct batched_forward_causal_softmax_bias_dropout_dispatch
                 BOOL_SWITCH(param.is_cross_attention, kIsCrossAttention, [&] {
                     using HstuPipelineProblem = HstuPipelineProblemTemp<kIsCrossAttention>;
 
-                    if constexpr(!kUseTrLoad)
+                    if constexpr(!use_trload_pipeline)
                     {
                         using HstuPipeline = std::conditional_t<
                             kUseSoftmax,
diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_batched_forward_splitkv_dispatch.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_batched_forward_splitkv_dispatch.hpp
index 8af4deee3c..fb7b005aaf 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_batched_forward_splitkv_dispatch.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_batched_forward_splitkv_dispatch.hpp
@@ -44,9 +44,9 @@ struct batched_forward_splitkv_causal_softmax_bias_dropout_dispatch
     using HstuAttentionCombineTileSetting = HstuAttentionFwdSplitKVCombineTileSetting<MaxK>::Type;
 
 #ifdef BUILD_HSTU_FOR_GFX95_ONLY
-    static constexpr bool kUseTrLoad = true;
+    static constexpr bool use_trload_pipeline = true;
 #else
-    static constexpr bool kUseTrLoad = false;
+    static constexpr bool use_trload_pipeline = false;
 #endif
 
     template <bool kIsCrossAttention>
@@ -62,7 +62,6 @@ struct batched_forward_splitkv_causal_softmax_bias_dropout_dispatch
         kHasDropout,
         kUseCausal,
         kUseSoftmax,
-        kUseTrLoad,
         HstuAttentionFwdTileSetting>;
 
     using OaccDataType = HstuAttentionFwdTypeConfig<InOutDataType>::OaccDataType;
@@ -107,7 +106,7 @@ struct batched_forward_splitkv_causal_softmax_bias_dropout_dispatch
                     BOOL_SWITCH(param.is_cross_attention, kIsCrossAttention, [&] {
                         using HstuPipelineProblem = HstuFwdPipelineProblemTemp<kIsCrossAttention>;
 
-                        if constexpr(!kUseTrLoad)
+                        if constexpr(!use_trload_pipeline)
                         {
                             using HstuPipeline = std::conditional_t<
                                 kUseSoftmax,
diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_fwd_kernel.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_fwd_kernel.hpp
index 1ab7178c0a..716741fe0f 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_fwd_kernel.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_fwd_kernel.hpp
@@ -13,6 +13,7 @@
 #include <variant>
 
 #include "hstu_block_masking.hpp"
+#include "hstu_attention_util.hpp"
 
 #ifndef HSTU_SCHED_BATCH_AS_FIRST_GRID_DIM
 #define HSTU_SCHED_BATCH_AS_FIRST_GRID_DIM 1
@@ -45,13 +46,14 @@ struct HstuAttentionFwdKernel
     static constexpr auto kHasBias          = HstuAttentionPipeline::Problem::kHasBias;
     static constexpr bool kHasDropout       = HstuAttentionPipeline::Problem::kHasDropout;
     static constexpr bool kHasCausalMask    = HstuAttentionPipeline::Problem::kHasCausal;
-    static constexpr bool kUseTrLoad        = HstuAttentionPipeline::Problem::kUseTrLoad;
 
     static constexpr bool kPadSeqLenQ   = HstuAttentionPipeline::kPadSeqLenQ;
     static constexpr bool kPadSeqLenK   = HstuAttentionPipeline::kPadSeqLenK;
     static constexpr bool kPadHeadDimQK = HstuAttentionPipeline::kPadHeadDimQK;
     static constexpr bool kPadHeadDimV  = HstuAttentionPipeline::kPadHeadDimV;
 
+    static constexpr bool kUseTrLoad = detail::is_using_trload_v<HstuAttentionPipeline>;
+
     template <ck_tile::index_t I> // to avoid duplicated base class problem, introduce an template
                                   // arg
     struct HstuAttentionFwdEmptyKargs
diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_fwd_pipeline_policy.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_fwd_pipeline_policy.hpp
index 4fb2feb6e1..49dc92e6bf 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_fwd_pipeline_policy.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_fwd_pipeline_policy.hpp
@@ -45,10 +45,10 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
         return WG::WarpGemmAttribute::kKPerThread;
     };
 
-    template <typename Problem>
+    template <typename Problem, bool kUseTrLoad = false>
     CK_TILE_HOST_DEVICE static constexpr ck_tile::index_t GetKVWarpGemmKPerThreadSize()
     {
-        using BlockGemm       = remove_cvref_t<decltype(GetKVBlockGemm<Problem>())>;
+        using BlockGemm       = remove_cvref_t<decltype(GetKVBlockGemm<Problem, kUseTrLoad>())>;
         constexpr auto config = BlockGemm::Policy::template GetWarpGemmMWarpNWarp<Problem>();
         using WG              = remove_cvref_t<decltype(config.template at<0>())>;
 
@@ -58,26 +58,14 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
     template <typename Problem>
     CK_TILE_HOST_DEVICE static constexpr auto MakeBiasDramTileDistribution()
     {
-        if constexpr(!Problem::kUseTrLoad)
-        {
-            using BlockGemm = remove_cvref_t<decltype(GetKVBlockGemm<Problem>())>;
+        using BlockGemm = remove_cvref_t<decltype(GetQKBlockGemm<Problem>())>;
 
-            return BlockGemm::template MakeABlockTileDistribution<
-                Problem::HstuAttentionTileSetting::kM0,
-                Problem::HstuAttentionTileSetting::kN0>();
-        }
-        else
-        {
-            using BlockGemm = remove_cvref_t<decltype(GetQKBlockGemm<Problem>())>;
+        constexpr auto bias_block_dstr_encode = BlockGemm::template MakeCBlockDistributionEncode<
+            Problem::HstuAttentionTileSetting::kM0,
+            Problem::HstuAttentionTileSetting::kN0>();
+        constexpr auto bias_block_dstr = make_static_tile_distribution(bias_block_dstr_encode);
 
-            constexpr auto bias_block_dstr_encode =
-                BlockGemm::template MakeCBlockDistributionEncode<
-                    Problem::HstuAttentionTileSetting::kM0,
-                    Problem::HstuAttentionTileSetting::kN0>();
-            constexpr auto bias_block_dstr = make_static_tile_distribution(bias_block_dstr_encode);
-
-            return bias_block_dstr;
-        };
+        return bias_block_dstr;
     }
 
     template <typename Problem>
@@ -117,20 +105,20 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
         return Problem::GetKDramTileAccessMaxVectorSize();
     }
 
-    template <typename Problem>
+    template <typename Problem, bool kUseTrLoad = false>
     CK_TILE_HOST_DEVICE static constexpr auto GetSmemKPackV()
     {
-        if constexpr(GetKVWarpGemmKPerThreadSize<Problem>() >= 8)
+        if constexpr(GetKVWarpGemmKPerThreadSize<Problem, kUseTrLoad>() >= 8)
             return 8;
         else
             return 4;
     }
 
-    template <typename Problem>
+    template <typename Problem, bool kUseTrLoad = false>
     CK_TILE_HOST_DEVICE static constexpr auto GetAlignmentV()
     {
         // special consideration when shuffling is required before storing V to LDS
-        if constexpr(!Problem::kUseTrLoad)
+        if constexpr(!kUseTrLoad)
         {
             using VDataType = remove_cvref_t<typename Problem::QKVDataType>;
 
@@ -183,13 +171,13 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
         };
     };
 
-    template <typename Problem>
+    template <typename Problem, bool kUseTrLoad = false>
     CK_TILE_HOST_DEVICE static constexpr auto GetVSingleSmemElementSpaceSize()
     {
         constexpr index_t kNPerBlock = Problem::HstuAttentionTileSetting::kN1;
         constexpr index_t kKPerBlock = Problem::HstuAttentionTileSetting::kK1;
 
-        if constexpr(!Problem::kUseTrLoad)
+        if constexpr(!kUseTrLoad)
         {
             constexpr index_t N1     = GetAlignmentV<Problem>();
             constexpr index_t N0     = kNPerBlock / N1;
@@ -203,14 +191,14 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
         };
     };
 
-    template <typename Problem>
+    template <typename Problem, bool kPipelineUseTrLoad = false>
     CK_TILE_HOST_DEVICE static constexpr auto GetSingleSmemElementSpaceSize()
     {
         return max(GetKSingleSmemElementSpaceSize<Problem>(),
-                   GetVSingleSmemElementSpaceSize<Problem>());
+                   GetVSingleSmemElementSpaceSize<Problem, kPipelineUseTrLoad>());
     };
 
-    template <typename Problem>
+    template <typename Problem, bool kPipelineUseTrLoad = false>
     CK_TILE_HOST_DEVICE static constexpr auto MakeKLdsBlockDescriptor()
     {
         constexpr index_t NumKLdsBuffers = GetNumKVLdsBuffers<Problem>();
@@ -219,6 +207,9 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
         constexpr index_t kKPack         = GetSmemKPackK<Problem>();
         constexpr index_t kKVector       = GetAlignmentK<Problem>();
 
+        constexpr index_t SingleSmemElementSpaceSize =
+            GetSingleSmemElementSpaceSize<Problem, kPipelineUseTrLoad>();
+
         // for hdim96 and hdim160, use simplest layout
         if constexpr(kKPerBlock < Problem::HstuAttentionTileSetting::kSubQKHeaddim)
         {
@@ -226,8 +217,6 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
 
             static_assert(KSingleSmemElementSpaceSize == GetKSingleSmemElementSpaceSize<Problem>());
 
-            constexpr index_t SingleSmemElementSpaceSize = GetSingleSmemElementSpaceSize<Problem>();
-
             constexpr auto k_lds_block_desc_0 = make_naive_tensor_descriptor(
                 make_tuple(number<NumKLdsBuffers>{}, number<kNPerBlock>{}, number<kKPerBlock>{}),
                 make_tuple(number<SingleSmemElementSpaceSize>{}, number<kKPerBlock>{}, number<1>{}),
@@ -252,8 +241,6 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
 
             static_assert(KSingleSmemElementSpaceSize == GetKSingleSmemElementSpaceSize<Problem>());
 
-            constexpr index_t SingleSmemElementSpaceSize = GetSingleSmemElementSpaceSize<Problem>();
-
             using KDataType = remove_cvref_t<typename Problem::QKVDataType>;
 
             constexpr index_t DataTypeSize = sizeof(KDataType);
@@ -322,8 +309,6 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
 
             static_assert(KSingleSmemElementSpaceSize == GetKSingleSmemElementSpaceSize<Problem>());
 
-            constexpr index_t SingleSmemElementSpaceSize = GetSingleSmemElementSpaceSize<Problem>();
-
             constexpr auto k_lds_block_desc_0 =
                 make_naive_tensor_descriptor(make_tuple(number<NumKLdsBuffers>{},
                                                         number<kKPerBlock / kKVector>{},
@@ -405,7 +390,7 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
         };
     }
 
-    template <typename Problem>
+    template <typename Problem, bool kUseTrLoad = false>
     CK_TILE_HOST_DEVICE static constexpr auto MakeVLdsBlockDescriptor()
     {
         constexpr index_t NumVLdsBuffers = GetNumKVLdsBuffers<Problem>();
@@ -413,7 +398,7 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
         constexpr index_t kNPerBlock     = Problem::HstuAttentionTileSetting::kN1;
         constexpr index_t kKPerBlock     = Problem::HstuAttentionTileSetting::kK1;
 
-        if constexpr(!Problem::kUseTrLoad)
+        if constexpr(!kUseTrLoad)
         {
             constexpr index_t N1 = GetAlignmentV<Problem>();
             constexpr index_t N0 = kNPerBlock / N1;
@@ -456,14 +441,15 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
         }
         else
         {
-            constexpr index_t kKPack = GetSmemKPackV<Problem>();
+            constexpr index_t kKPack = GetSmemKPackV<Problem, true>();
 
             constexpr auto XorGroupSize =
                 Problem::HstuAttentionTileSetting::Gemm1WarpTile::at(number<0>{});
 
             constexpr index_t VSingleSmemElementSpaceSize = kNPerBlock * kKPerBlock;
 
-            static_assert(VSingleSmemElementSpaceSize == GetVSingleSmemElementSpaceSize<Problem>());
+            static_assert(VSingleSmemElementSpaceSize ==
+                          GetVSingleSmemElementSpaceSize<Problem, true>());
 
             constexpr auto v_lds_block_desc_naive =
                 make_naive_tensor_descriptor(make_tuple(number<NumVLdsBuffers>{},
@@ -497,14 +483,14 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
         };
     }
 
-    template <typename Problem>
+    template <typename Problem, bool kUseTrLoad = false>
     CK_TILE_DEVICE static constexpr auto MakeVDramTileDistribution()
     {
         constexpr index_t kBlockSize = Problem::kBlockSize;
         constexpr index_t kNPerBlock = Problem::HstuAttentionTileSetting::kN1;
         constexpr index_t kKPerBlock = Problem::HstuAttentionTileSetting::kK1;
 
-        if constexpr(!Problem::kUseTrLoad)
+        if constexpr(!kUseTrLoad)
         {
             constexpr index_t NPerThread = GetAlignmentV<Problem>();
             constexpr index_t NThreads   = kNPerBlock / NPerThread;
@@ -526,7 +512,7 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
         }
         else
         {
-            constexpr index_t NPerThread = GetAlignmentV<Problem>();
+            constexpr index_t NPerThread = GetAlignmentV<Problem, true>();
             constexpr index_t NThreads   = kNPerBlock / NPerThread;
 
             constexpr index_t ElemPerThread = kNPerBlock * kKPerBlock / kBlockSize;
@@ -652,7 +638,7 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
                Problem::HstuAttentionTileSetting::Gemm1BlockWarps::at(number<1>{});
     };
 
-    template <typename Problem>
+    template <typename Problem, bool kUseTrLoad = false>
     CK_TILE_HOST_DEVICE static constexpr auto GetKVBlockGemm()
     {
         using GemmProblem = BlockGemmProblem<
@@ -727,7 +713,7 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
             typename Problem::HstuAttentionTileSetting::Gemm1BlockWarps,
             WarpGemm>;
 
-        if constexpr(!Problem::kUseTrLoad)
+        if constexpr(!kUseTrLoad)
         {
             return BlockGemmARegBSmemCRegV2Hack_1<GemmProblem, BlockGemmPolicy>{};
         }
@@ -737,22 +723,22 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
         };
     }
 
-    template <typename Problem>
+    template <typename Problem, bool kUseTrLoad = false>
     CK_TILE_HOST_DEVICE static constexpr auto GetAlignmentO()
     {
-        using BlockGemm       = remove_cvref_t<decltype(GetKVBlockGemm<Problem>())>;
+        using BlockGemm       = remove_cvref_t<decltype(GetKVBlockGemm<Problem, kUseTrLoad>())>;
         constexpr auto config = BlockGemm::Policy::template GetWarpGemmMWarpNWarp<Problem>();
         using WG              = remove_cvref_t<decltype(config.template at<0>())>;
 
         return WG::WarpGemmAttribute::Impl::kCM1PerLane;
     }
 
-    template <typename Problem>
+    template <typename Problem, bool kPipelineUseTrLoad = false>
     CK_TILE_HOST_DEVICE static constexpr ck_tile::index_t GetSmemSizeKV()
     {
         constexpr index_t num_kv_lds_buffers = GetNumKVLdsBuffers<Problem>();
 
-        return num_kv_lds_buffers * GetSingleSmemElementSpaceSize<Problem>() *
+        return num_kv_lds_buffers * GetSingleSmemElementSpaceSize<Problem, kPipelineUseTrLoad>() *
                sizeof(typename Problem::QKVDataType);
     };
 
@@ -762,10 +748,10 @@ struct HstuAttentionFwdPipelineQRKSVSPolicy
         return 0;
     };
 
-    template <typename Problem>
+    template <typename Problem, bool kPipelineUseTrLoad = false>
     CK_TILE_HOST_DEVICE static constexpr ck_tile::index_t GetSmemSize()
     {
-        return GetSmemSizeKV<Problem>() + GetSmemSizeDropout<Problem>();
+        return GetSmemSizeKV<Problem, kPipelineUseTrLoad>() + GetSmemSizeDropout<Problem>();
     }
 };
 
diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_fwd_splitkv_kernel.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_fwd_splitkv_kernel.hpp
index 96c14ebb04..d9ae25a9c1 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_fwd_splitkv_kernel.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_fwd_splitkv_kernel.hpp
@@ -13,6 +13,7 @@
 #include <variant>
 
 #include "hstu_block_masking.hpp"
+#include "hstu_attention_util.hpp"
 
 #ifndef HSTU_SCHED_BATCH_AS_FIRST_GRID_DIM
 #define HSTU_SCHED_BATCH_AS_FIRST_GRID_DIM 1
@@ -48,13 +49,14 @@ struct HstuAttentionFwdSplitKVKernel
     static constexpr auto kHasBias          = HstuAttentionPipeline::Problem::kHasBias;
     static constexpr bool kHasDropout       = HstuAttentionPipeline::Problem::kHasDropout;
     static constexpr bool kHasCausalMask    = HstuAttentionPipeline::Problem::kHasCausal;
-    static constexpr bool kUseTrLoad        = HstuAttentionPipeline::Problem::kUseTrLoad;
 
     static constexpr bool kPadSeqLenQ   = HstuAttentionPipeline::kPadSeqLenQ;
     static constexpr bool kPadSeqLenK   = HstuAttentionPipeline::kPadSeqLenK;
     static constexpr bool kPadHeadDimQK = HstuAttentionPipeline::kPadHeadDimQK;
     static constexpr bool kPadHeadDimV  = HstuAttentionPipeline::kPadHeadDimV;
 
+    static constexpr bool kUseTrLoad = detail::is_using_trload_v<HstuAttentionPipeline>;
+
     template <ck_tile::index_t I> // to avoid duplicated base class problem, introduce an template
                                   // arg
     struct HstuAttentionFwdEmptyKargs
diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_group_forward_dispatch.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_group_forward_dispatch.hpp
index fa69ab7cb8..9e8df40392 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_group_forward_dispatch.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_group_forward_dispatch.hpp
@@ -39,9 +39,9 @@ struct group_forward_causal_softmax_bias_dropout_dispatch
                                     HstuAttentionNoSoftmaxFwdTileSetting<MaxK, MTile>>::Type;
 
 #ifdef BUILD_HSTU_FOR_GFX95_ONLY
-    static constexpr bool kUseTrLoad = true;
+    static constexpr bool use_trload_pipeline = true;
 #else
-    static constexpr bool kUseTrLoad = false;
+    static constexpr bool use_trload_pipeline = false;
 #endif
 
     template <bool kIsCrossAttention>
@@ -57,7 +57,6 @@ struct group_forward_causal_softmax_bias_dropout_dispatch
         kHasDropout,
         kUseCausal,
         kUseSoftmax,
-        kUseTrLoad,
         HstuAttentionTileSetting>;
 
     static void Run(HstuAttentionGroupFwdParams& param, hipStream_t stream)
@@ -89,7 +88,7 @@ struct group_forward_causal_softmax_bias_dropout_dispatch
             BOOL_SWITCH(param.is_cross_attention, kIsCrossAttention, [&] {
                 using HstuPipelineProblem = HstuPipelineProblemTemp<kIsCrossAttention>;
 
-                if constexpr(!kUseTrLoad)
+                if constexpr(!use_trload_pipeline)
                 {
                     using HstuPipeline = std::conditional_t<
                         kUseSoftmax,
diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_group_forward_splitkv_dispatch.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_group_forward_splitkv_dispatch.hpp
index f7a373d416..cd0591cbfd 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_group_forward_splitkv_dispatch.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_group_forward_splitkv_dispatch.hpp
@@ -45,9 +45,9 @@ struct group_forward_splitkv_causal_softmax_bias_dropout_dispatch
         typename HstuAttentionFwdSplitKVCombineTileSetting<MaxK>::Type;
 
 #ifdef BUILD_HSTU_FOR_GFX95_ONLY
-    static constexpr bool kUseTrLoad = true;
+    static constexpr bool use_trload_pipeline = true;
 #else
-    static constexpr bool kUseTrLoad = false;
+    static constexpr bool use_trload_pipeline = false;
 #endif
 
     template <bool kIsCrossAttention>
@@ -63,7 +63,6 @@ struct group_forward_splitkv_causal_softmax_bias_dropout_dispatch
         kHasDropout,
         kUseCausal,
         kUseSoftmax,
-        kUseTrLoad,
         HstuAttentionFwdTileSetting>;
 
     using OaccDataType = HstuAttentionFwdTypeConfig<InOutDataType>::OaccDataType;
@@ -101,7 +100,7 @@ struct group_forward_splitkv_causal_softmax_bias_dropout_dispatch
                 BOOL_SWITCH(param.is_cross_attention, kIsCrossAttention, [&] {
                     using HstuPipelineProblem = HstuFwdPipelineProblemTemp<kIsCrossAttention>;
 
-                    if constexpr(!kUseTrLoad)
+                    if constexpr(!use_trload_pipeline)
                     {
                         using HstuPipeline = std::conditional_t<
                             kUseSoftmax,
diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_jagged_forward_dispatch.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_jagged_forward_dispatch.hpp
index 0e8dadee2f..052eb8e19e 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_jagged_forward_dispatch.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_jagged_forward_dispatch.hpp
@@ -39,9 +39,9 @@ struct jagged_forward_causal_softmax_bias_dropout_dispatch
                                     HstuAttentionNoSoftmaxFwdTileSetting<MaxK, MTile>>::Type;
 
 #ifdef BUILD_HSTU_FOR_GFX95_ONLY
-    static constexpr bool kUseTrLoad = true;
+    static constexpr bool use_trload_pipeline = true;
 #else
-    static constexpr bool kUseTrLoad = false;
+    static constexpr bool use_trload_pipeline = false;
 #endif
 
     template <bool kIsCrossAttention>
@@ -57,7 +57,6 @@ struct jagged_forward_causal_softmax_bias_dropout_dispatch
         kHasDropout,
         kUseCausal,
         kUseSoftmax,
-        kUseTrLoad,
         HstuAttentionTileSetting>;
 
     static void Run(HstuAttentionNoGroupFwdParams& param, hipStream_t stream)
@@ -89,7 +88,7 @@ struct jagged_forward_causal_softmax_bias_dropout_dispatch
             BOOL_SWITCH(param.is_cross_attention, kIsCrossAttention, [&] {
                 using HstuPipelineProblem = HstuPipelineProblemTemp<kIsCrossAttention>;
 
-                if constexpr(!kUseTrLoad)
+                if constexpr(!use_trload_pipeline)
                 {
                     using HstuPipeline = std::conditional_t<
                         kUseSoftmax,
diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_jagged_forward_splitkv_dispatch.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_jagged_forward_splitkv_dispatch.hpp
index 3021785920..5f6444d31a 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_jagged_forward_splitkv_dispatch.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_jagged_forward_splitkv_dispatch.hpp
@@ -44,9 +44,9 @@ struct jagged_forward_splitkv_causal_softmax_bias_dropout_dispatch
     using HstuAttentionCombineTileSetting = HstuAttentionFwdSplitKVCombineTileSetting<MaxK>::Type;
 
 #ifdef BUILD_HSTU_FOR_GFX95_ONLY
-    static constexpr bool kUseTrLoad = true;
+    static constexpr bool use_trload_pipeline = true;
 #else
-    static constexpr bool kUseTrLoad = false;
+    static constexpr bool use_trload_pipeline = false;
 #endif
 
     template <bool kIsCrossAttention>
@@ -62,7 +62,6 @@ struct jagged_forward_splitkv_causal_softmax_bias_dropout_dispatch
         kHasDropout,
         kUseCausal,
         kUseSoftmax,
-        kUseTrLoad,
         HstuAttentionFwdTileSetting>;
 
     using OaccDataType = HstuAttentionFwdTypeConfig<InOutDataType>::OaccDataType;
@@ -100,7 +99,7 @@ struct jagged_forward_splitkv_causal_softmax_bias_dropout_dispatch
                 BOOL_SWITCH(param.is_cross_attention, kIsCrossAttention, [&] {
                     using HstuPipelineProblem = HstuFwdPipelineProblemTemp<kIsCrossAttention>;
 
-                    if constexpr(!kUseTrLoad)
+                    if constexpr(!use_trload_pipeline)
                     {
                         using HstuPipeline = std::conditional_t<
                             kUseSoftmax,
diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_no_softmax_fwd_pipeline.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_no_softmax_fwd_pipeline.hpp
index c73f0ecffd..77d32295a1 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_no_softmax_fwd_pipeline.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_no_softmax_fwd_pipeline.hpp
@@ -46,8 +46,6 @@ struct HstuAttentionNoSoftmaxFwdPipelineQRKSVS
     static constexpr bool kHasDropout = Problem::kHasDropout;
     static constexpr bool kHasCausal  = Problem::kHasCausal;
 
-    static_assert(Problem::kUseTrLoad == false, "Check failed!");
-
     static constexpr bool kUseTrLoad = false;
 
     static constexpr bool kPadSeqLenQ   = Traits::kPadSeqLenQ;
diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_no_softmax_fwd_trload_pipeline.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_no_softmax_fwd_trload_pipeline.hpp
index d2fc5806c8..81f1192eed 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_no_softmax_fwd_trload_pipeline.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_no_softmax_fwd_trload_pipeline.hpp
@@ -46,8 +46,6 @@ struct HstuAttentionNoSoftmaxFwdPipelineQRKSVSTrLoad
     static constexpr bool kHasDropout = Problem::kHasDropout;
     static constexpr bool kHasCausal  = Problem::kHasCausal;
 
-    static_assert(Problem::kUseTrLoad == true, "Check failed!");
-
     static constexpr bool kUseTrLoad = true;
 
     static constexpr bool kPadSeqLenQ   = Traits::kPadSeqLenQ;
@@ -62,10 +60,10 @@ struct HstuAttentionNoSoftmaxFwdPipelineQRKSVSTrLoad
     static constexpr index_t kAlignmentK =
         kPadHeadDimQK ? 1 : Policy::template GetAlignmentK<Problem>();
     static constexpr index_t kAlignmentV =
-        Traits::kPadHeadDimV ? 1 : Policy::template GetAlignmentV<Problem>();
+        Traits::kPadHeadDimV ? 1 : Policy::template GetAlignmentV<Problem, true /*kUseTrLoad*/>();
 
     static constexpr index_t kAlignmentO =
-        kPadHeadDimV ? 1 : Policy::template GetAlignmentO<Problem>();
+        kPadHeadDimV ? 1 : Policy::template GetAlignmentO<Problem, true /*kUseTrLoad */>();
     static constexpr index_t kAlignmentBias =
         kPadSeqLenK ? 1 : Policy::template GetAlignmentBias<Problem>();
 
@@ -110,7 +108,7 @@ struct HstuAttentionNoSoftmaxFwdPipelineQRKSVSTrLoad
 
     CK_TILE_DEVICE static constexpr ck_tile::index_t GetSmemSize()
     {
-        return Policy::template GetSmemSize<Problem>();
+        return Policy::template GetSmemSize<Problem, true /*kPipelineUseTrLoad*/>();
     }
 
     template <typename QDramBlockWindowTmp,
@@ -166,7 +164,7 @@ struct HstuAttentionNoSoftmaxFwdPipelineQRKSVSTrLoad
 
         // Block GEMM
         constexpr auto gemm_0 = Policy::template GetQKBlockGemm<Problem>();
-        constexpr auto gemm_1 = Policy::template GetKVBlockGemm<Problem>();
+        constexpr auto gemm_1 = Policy::template GetKVBlockGemm<Problem, true /*kUseTrLoad*/>();
 
         // SaccBlockTile size is [kM0, kN0Sub]
         // PcompBlockTile size is [kM0, kN0]
@@ -220,9 +218,13 @@ struct HstuAttentionNoSoftmaxFwdPipelineQRKSVSTrLoad
         // K tile in LDS
         QKVDataType* k_lds_ptr = static_cast<QKVDataType*>(smem_ptr);
         auto k_lds             = make_tensor_view<address_space_enum::lds>(
-            k_lds_ptr, Policy::template MakeKLdsBlockDescriptor<Problem>());
+            k_lds_ptr,
+            Policy::template MakeKLdsBlockDescriptor<Problem, true /*kPipelineUseTrLoad*/>());
         auto k_lds_window = make_tile_window(
-            k_lds, Policy::template MakeKLdsBlockDescriptor<Problem>().get_lengths(), {0, 0});
+            k_lds,
+            Policy::template MakeKLdsBlockDescriptor<Problem, true /*kPipelineUseTrLoad*/>()
+                .get_lengths(),
+            {0, 0});
 
         using k_lds_window_type = decltype(get_slice_tile(
             k_lds_window, sequence<0, 0>{}, sequence<kN0Sub, kQKHeaddim>{}));
@@ -238,9 +240,11 @@ struct HstuAttentionNoSoftmaxFwdPipelineQRKSVSTrLoad
         // V tile in LDS
         auto v_lds = make_tensor_view<address_space_enum::lds>(
             reinterpret_cast<QKVDataType*>(smem_ptr),
-            Policy::template MakeVLdsBlockDescriptor<Problem>());
+            Policy::template MakeVLdsBlockDescriptor<Problem, true /*kUseTrLoad*/>());
         auto v_lds_window = make_tile_window(
-            v_lds, Policy::template MakeVLdsBlockDescriptor<Problem>().get_lengths(), {0, 0});
+            v_lds,
+            Policy::template MakeVLdsBlockDescriptor<Problem, true /*kUseTrLoad*/>().get_lengths(),
+            {0, 0});
 
         using v_lds_window_type =
             decltype(get_slice_tile(v_lds_window, sequence<0, 0>{}, sequence<kK1, kN1>{}));
@@ -252,11 +256,11 @@ struct HstuAttentionNoSoftmaxFwdPipelineQRKSVSTrLoad
                 v_lds_window, sequence<i_buf * kK1, 0>{}, sequence<(i_buf + 1) * kK1, kN1>{});
         });
 
-        auto v_dram_window =
-            make_tile_window(v_dram_block_window_tmp.get_bottom_tensor_view(),
-                             v_dram_block_window_tmp.get_window_lengths(),
-                             {seqlen_k_start, 0},
-                             Policy::template MakeVDramTileDistribution<Problem>());
+        auto v_dram_window = make_tile_window(
+            v_dram_block_window_tmp.get_bottom_tensor_view(),
+            v_dram_block_window_tmp.get_window_lengths(),
+            {seqlen_k_start, 0},
+            Policy::template MakeVDramTileDistribution<Problem, true /*kUseTrLoad*/>());
 
         // reduction function for softmax
         const auto f_silu = [&](CompDataType& x) {
@@ -397,7 +401,8 @@ struct HstuAttentionNoSoftmaxFwdPipelineQRKSVSTrLoad
             if constexpr(kHasDropout)
             {
                 auto randval_lds_ptr =
-                    reinterpret_cast<char*>(smem_ptr) + Policy::template GetSmemSizeKV<Problem>();
+                    reinterpret_cast<char*>(smem_ptr) +
+                    Policy::template GetSmemSizeKV<Problem, true /*kPipelineUseTrLoad*/>();
 
                 dropout.template Run<decltype(gemm_0), CompDataType, uint8_t>(
                     randval_lds_ptr, seqlen_k_curr, pcomp_tile, null_randval_window);
diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_pipeline_problem.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_pipeline_problem.hpp
index 3dabf8acd3..6a42ba448a 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_pipeline_problem.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_pipeline_problem.hpp
@@ -57,8 +57,6 @@ CK_TILE_HOST_DEVICE static constexpr auto GetDramTileAccessMaxVectorSize()
 // but it also contains other information needed by the pipeline, which includes
 // TileShape -- which determines how block-layer calculation is done in tiles and
 //              how warps are allocated on dimensions
-// Traits -- other information required for running the kernel and pipeline
-
 template <typename InOutDataType_,
           typename GemmAccDataType_,
           typename CompDataType_, // data type for SiLU and other non-linear calculation
@@ -70,7 +68,6 @@ template <typename InOutDataType_,
           bool kHasDropout_,
           bool kHasCausal_,
           bool kUseSoftmax_,
-          bool kUseTrLoad_, // use transposed loading to load V tile from lds to vgprs
           typename AttentionTileSetting_>
 struct HstuAttentionFwdPipelineProblem
 {
@@ -94,7 +91,6 @@ struct HstuAttentionFwdPipelineProblem
     static constexpr bool kHasDropout       = kHasDropout_;
     static constexpr bool kHasCausal        = kHasCausal_;
     static constexpr bool kUseSoftmax       = kUseSoftmax_;
-    static constexpr bool kUseTrLoad        = kUseTrLoad_;
 
     static_assert(!kUseGroup || (kUseGroup && kIsJagged),
                   "Group HSTU is only used with jagged mode!");
diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_util.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_util.hpp
index 0bfc2c565c..578aefbc7c 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_util.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_util.hpp
@@ -30,3 +30,29 @@ static inline int get_number_of_cu()
 
     return props.multiProcessorCount;
 }
+
+namespace ck_tile {
+
+namespace detail {
+
+// A helper struct for detecting kUseTrLoad
+// T is the pipeline class used by the kernel instance
+template <typename T, typename = void>
+struct has_use_trload_flag : std::false_type
+{
+};
+
+template <typename T>
+struct has_use_trload_flag<
+    T,
+    std::enable_if_t<std::is_convertible_v<decltype(T::kUseTrLoad), bool> && T::kUseTrLoad>>
+    : std::true_type
+{
+};
+
+template <typename T>
+static inline constexpr bool is_using_trload_v = has_use_trload_flag<T>::value;
+
+} // namespace detail
+
+} // namespace ck_tile
diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_with_softmax_fwd_pipeline.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_with_softmax_fwd_pipeline.hpp
index e598a7439c..fb4cee3648 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_with_softmax_fwd_pipeline.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_with_softmax_fwd_pipeline.hpp
@@ -46,8 +46,6 @@ struct HstuAttentionWithSoftmaxFwdPipelineQRKSVS
     static constexpr bool kHasDropout = Problem::kHasDropout;
     static constexpr bool kHasCausal  = Problem::kHasCausal;
 
-    static_assert(Problem::kUseTrLoad == false, "Check failed!");
-
     static constexpr bool kUseTrLoad = false;
 
     static constexpr bool kPadSeqLenQ   = Traits::kPadSeqLenQ;
diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_with_softmax_fwd_trload_pipeline.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_with_softmax_fwd_trload_pipeline.hpp
index b5fdf03d47..ee0be7b7b4 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_with_softmax_fwd_trload_pipeline.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_with_softmax_fwd_trload_pipeline.hpp
@@ -46,8 +46,6 @@ struct HstuAttentionWithSoftmaxFwdPipelineQRKSVSTrLoad
     static constexpr bool kHasDropout = Problem::kHasDropout;
     static constexpr bool kHasCausal  = Problem::kHasCausal;
 
-    static_assert(Problem::kUseTrLoad == true, "Check failed!");
-
     static constexpr bool kUseTrLoad = true;
 
     static constexpr bool kPadSeqLenQ   = Traits::kPadSeqLenQ;
@@ -62,10 +60,10 @@ struct HstuAttentionWithSoftmaxFwdPipelineQRKSVSTrLoad
     static constexpr index_t kAlignmentK =
         kPadHeadDimQK ? 1 : Policy::template GetAlignmentK<Problem>();
     static constexpr index_t kAlignmentV =
-        Traits::kPadHeadDimV ? 1 : Policy::template GetAlignmentV<Problem>();
+        Traits::kPadHeadDimV ? 1 : Policy::template GetAlignmentV<Problem, true /*kUseTrLoad*/>();
 
     static constexpr index_t kAlignmentO =
-        kPadHeadDimV ? 1 : Policy::template GetAlignmentO<Problem>();
+        kPadHeadDimV ? 1 : Policy::template GetAlignmentO<Problem, true /*kUseTrLoad*/>();
     static constexpr index_t kAlignmentBias =
         kPadSeqLenK ? 1 : Policy::template GetAlignmentBias<Problem>();
 
@@ -110,7 +108,7 @@ struct HstuAttentionWithSoftmaxFwdPipelineQRKSVSTrLoad
 
     CK_TILE_DEVICE static constexpr ck_tile::index_t GetSmemSize()
     {
-        return Policy::template GetSmemSize<Problem>();
+        return Policy::template GetSmemSize<Problem, true /*kPipelineUseTrLoad*/>();
     }
 
     template <typename QDramBlockWindowTmp,
@@ -169,7 +167,8 @@ struct HstuAttentionWithSoftmaxFwdPipelineQRKSVSTrLoad
 
         // Block GEMM
         constexpr auto gemm_0 = Policy::template GetQKBlockGemm<Problem>();
-        constexpr auto gemm_1 = Policy::template GetKVBlockGemm<Problem>();
+        constexpr auto gemm_1 =
+            Policy::template GetKVBlockGemm<Problem, true /*kPipelineUseTrLoad*/>();
 
         // SaccBlockTile size is [kM0, kN0Sub]
         // PcompBlockTile size is [kM0, kN0]
@@ -230,9 +229,13 @@ struct HstuAttentionWithSoftmaxFwdPipelineQRKSVSTrLoad
         // K tile in LDS
         QKVDataType* k_lds_ptr = static_cast<QKVDataType*>(smem_ptr);
         auto k_lds             = make_tensor_view<address_space_enum::lds>(
-            k_lds_ptr, Policy::template MakeKLdsBlockDescriptor<Problem>());
+            k_lds_ptr,
+            Policy::template MakeKLdsBlockDescriptor<Problem, true /*kPipelineUseTrLoad*/>());
         auto k_lds_window = make_tile_window(
-            k_lds, Policy::template MakeKLdsBlockDescriptor<Problem>().get_lengths(), {0, 0});
+            k_lds,
+            Policy::template MakeKLdsBlockDescriptor<Problem, true /*kPipelineUseTrLoad*/>()
+                .get_lengths(),
+            {0, 0});
 
         using k_lds_window_type = decltype(get_slice_tile(
             k_lds_window, sequence<0, 0>{}, sequence<kN0Sub, kQKHeaddim>{}));
@@ -248,9 +251,11 @@ struct HstuAttentionWithSoftmaxFwdPipelineQRKSVSTrLoad
         // V tile in LDS
         auto v_lds = make_tensor_view<address_space_enum::lds>(
             reinterpret_cast<QKVDataType*>(smem_ptr),
-            Policy::template MakeVLdsBlockDescriptor<Problem>());
+            Policy::template MakeVLdsBlockDescriptor<Problem, true /*kUseTrLoad*/>());
         auto v_lds_window = make_tile_window(
-            v_lds, Policy::template MakeVLdsBlockDescriptor<Problem>().get_lengths(), {0, 0});
+            v_lds,
+            Policy::template MakeVLdsBlockDescriptor<Problem, true /*kUseTrLoad*/>().get_lengths(),
+            {0, 0});
 
         using v_lds_window_type =
             decltype(get_slice_tile(v_lds_window, sequence<0, 0>{}, sequence<kK1, kN1>{}));
@@ -262,11 +267,11 @@ struct HstuAttentionWithSoftmaxFwdPipelineQRKSVSTrLoad
                 v_lds_window, sequence<i_buf * kK1, 0>{}, sequence<(i_buf + 1) * kK1, kN1>{});
         });
 
-        auto v_dram_window =
-            make_tile_window(v_dram_block_window_tmp.get_bottom_tensor_view(),
-                             v_dram_block_window_tmp.get_window_lengths(),
-                             {seqlen_k_start, 0},
-                             Policy::template MakeVDramTileDistribution<Problem>());
+        auto v_dram_window = make_tile_window(
+            v_dram_block_window_tmp.get_bottom_tensor_view(),
+            v_dram_block_window_tmp.get_window_lengths(),
+            {seqlen_k_start, 0},
+            Policy::template MakeVDramTileDistribution<Problem, true /*kUseTrLoad*/>());
 
         const auto f_exp = [&](CompDataType x) {
             if constexpr(std::is_same_v<CompDataType, float>)
@@ -508,7 +513,8 @@ struct HstuAttentionWithSoftmaxFwdPipelineQRKSVSTrLoad
             if constexpr(kHasDropout)
             {
                 auto randval_lds_ptr =
-                    reinterpret_cast<char*>(smem_ptr) + Policy::template GetSmemSizeKV<Problem>();
+                    reinterpret_cast<char*>(smem_ptr) +
+                    Policy::template GetSmemSizeKV<Problem, true /*kPipelineUseTrLoad*/>();
 
                 dropout.template Run<decltype(gemm_0), CompDataType, uint8_t>(
                     randval_lds_ptr, seqlen_k_curr, pcomp_tile, null_randval_window);