diff --git a/compiler/src/iree/compiler/Codegen/ExternalInterfaces/CPUEncodingExternalModels.cpp b/compiler/src/iree/compiler/Codegen/ExternalInterfaces/CPUEncodingExternalModels.cpp
index 2b8eee71a9ec..fda222d34b24 100644
--- a/compiler/src/iree/compiler/Codegen/ExternalInterfaces/CPUEncodingExternalModels.cpp
+++ b/compiler/src/iree/compiler/Codegen/ExternalInterfaces/CPUEncodingExternalModels.cpp
@@ -452,6 +452,29 @@ enumerateMatmulTileRiscv64(TypeRange elementTypes, DictionaryAttr config) {
       };
     }
   }
+  // This adds support for our s8*sx`8->s32 kernel.
+  if (lhs.isSignlessInteger(8) && rhs.isSignlessInteger(8) &&
+      out.isSignlessInteger(32)) {
+    // This logic follows the f32 case, as both use 32-bit accumulators.
+    // For your +zvl512b target, vlen = 512.
+    // N0 = (512 bits / 32 bits_per_element) * 4_LMUL = 64 elements.
+    
+    // N0 for LMUL=8 path (M0=16)
+    int N0_lmul8 = vlen / 4;
+    // N0 for LMUL=4 path (M0=8, 4, 2, 1)
+    int N0_lmul4 = vlen / 8;
+
+    return {
+        // --- LMUL=8 Path ---
+        TileMxNxK{16, N0_lmul8, 1}, // Target tile for s8s8s32 (LMUL=8)
+
+        // --- LMUL=4 Paths ---
+        TileMxNxK{8, N0_lmul4, 1}, // Truncation (LMUL=4)
+        TileMxNxK{4, N0_lmul4, 1}, // Truncation (LMUL=4)
+        TileMxNxK{2, N0_lmul4, 1}, // Truncation (LMUL=4)
+        TileMxNxK{1, N0_lmul4, 1}, // Truncation (vecmat) (LMUL=4)
+    };
+  }
   // Fallback - no architecture-optimized tile size for this case.
   return {};
 }
diff --git a/runtime/src/iree/builtins/ukernel/arch/riscv_64/CMakeLists.txt b/runtime/src/iree/builtins/ukernel/arch/riscv_64/CMakeLists.txt
index 9469b86b277e..ab6c80b44c22 100644
--- a/runtime/src/iree/builtins/ukernel/arch/riscv_64/CMakeLists.txt
+++ b/runtime/src/iree/builtins/ukernel/arch/riscv_64/CMakeLists.txt
@@ -42,6 +42,7 @@ iree_bitcode_library(
     "${PROJECT_BINARY_DIR}/runtime/src/iree/schemas/cpu_data_headers_filegroup.stamp"
     "common_riscv_64.h"
     "mmt4d_riscv_64_internal.h"
+    "bme.h"
     "mmt4d_riscv_64_tiles.inl"
     "pack_riscv_64_internal.h"
     "unpack_riscv_64_internal.h"
@@ -177,6 +178,8 @@ iree_cc_library(
     riscv_64_v
   SRCS
     "mmt4d_riscv_64_v.c"
+  HDRS
+    "bme.h"
   COPTS
     "${IREE_UK_COPTS_RISCV_64_V}"
   DEPS
diff --git a/runtime/src/iree/builtins/ukernel/arch/riscv_64/bme.h b/runtime/src/iree/builtins/ukernel/arch/riscv_64/bme.h
new file mode 100644
index 000000000000..6ee763e309f1
--- /dev/null
+++ b/runtime/src/iree/builtins/ukernel/arch/riscv_64/bme.h
@@ -0,0 +1,64 @@
+// HACK reuse the scalar registers to avoid assembler hacking for now
+#define m0 "x0"
+#define m1 "x1"
+#define m2 "x2"
+#define m3 "x3"
+#define m4 "x4"
+#define m5 "x5"
+#define m6 "x6"
+#define m7 "x7"
+
+#define v0 "x0"
+#define v1 "x1"
+#define v2 "x2"
+#define v3 "x3"
+#define v4 "x4"
+#define v5 "x5"
+#define v6 "x6"
+#define v7 "x7"
+#define v8 "x8"
+#define v9 "x9"
+#define v10 "x10"
+#define v11 "x11"
+#define v12 "x12"
+#define v13 "x13"
+#define v14 "x14"
+#define v15 "x15"
+#define v16 "x16"
+#define v17 "x17"
+#define v18 "x18"
+#define v19 "x19"
+#define v20 "x20"
+#define v21 "x21"
+#define v22 "x22"
+#define v23 "x23"
+#define v24 "x24"
+#define v25 "x25"
+#define v26 "x26"
+#define v27 "x27"
+#define v28 "x28"
+#define v29 "x29"
+#define v30 "x30"
+#define v31 "x31"
+
+// opmvx. f6=b101010, f7=b1010101
+#define VMV_RV(md, rs1, vs2) \
+  asm volatile(".insn r 0x57, 0x6, 0x55, " md ", %0, " vs2 : : "r"(rs1));
+
+// opmvx. f6=b101110, f7=b1011101
+#define VMV_VR(vd, rs1, ms2) \
+  asm volatile(".insn r 0x57, 0x6, 0x5d, " vd ", %0, " ms2 : : "r"(rs1));
+
+// opmvx. f6=b101100, f7=b1011001
+#define OPMVINBCAST(md, vs2) \
+  asm volatile(".insn r 0x57, 0x6, 0x59, " md ", x0, " vs2);
+
+// opmvv. f6=b101000, f7=b1010001
+#define VOPACC(md, vs2, vs1) \
+  asm volatile(".insn r 0x57, 0x2, 0x51, " md ", " vs1 ", " vs2);
+
+#include <stddef.h> // For size_t
+#include <stdint.h> // For int8_t and int32_t
+
+//void i8_mm_bme_1x2(int32_t* c_bias, int32_t* c_out, int8_t* at, int8_t* b,
+//                   size_t M, size_t N, size_t K);
\ No newline at end of file
diff --git a/runtime/src/iree/builtins/ukernel/arch/riscv_64/mmt4d_riscv_64_tiles.inl b/runtime/src/iree/builtins/ukernel/arch/riscv_64/mmt4d_riscv_64_tiles.inl
index 4f4d0413a907..48247dc98dc9 100644
--- a/runtime/src/iree/builtins/ukernel/arch/riscv_64/mmt4d_riscv_64_tiles.inl
+++ b/runtime/src/iree/builtins/ukernel/arch/riscv_64/mmt4d_riscv_64_tiles.inl
@@ -32,3 +32,10 @@ IREE_UK_MMT4D_TILE(riscv_64, f16, f16, f16, 1, 1, _zvfh)
 IREE_UK_MMT4D_TILE(riscv_64, f16, f16, f16, 2, 1, _zvfh)
 IREE_UK_MMT4D_TILE(riscv_64, f16, f16, f16, 4, 1, _zvfh)
 IREE_UK_MMT4D_TILE(riscv_64, f16, f16, f16, 7, 1, _zvfh)
+
+// s8s8s32 tiles using the 'v' extension
+IREE_UK_MMT4D_TILE(riscv_64, s8, s8, s32, 1, 1, _v)
+IREE_UK_MMT4D_TILE(riscv_64, s8, s8, s32, 2, 1, _v)
+IREE_UK_MMT4D_TILE(riscv_64, s8, s8, s32, 4, 1, _v)
+IREE_UK_MMT4D_TILE(riscv_64, s8, s8, s32, 8, 1, _v)
+IREE_UK_MMT4D_TILE(riscv_64, s8, s8, s32, 16, 1, _v)
\ No newline at end of file
diff --git a/runtime/src/iree/builtins/ukernel/arch/riscv_64/mmt4d_riscv_64_v.c b/runtime/src/iree/builtins/ukernel/arch/riscv_64/mmt4d_riscv_64_v.c
index 2517080da24a..7280e3aef0af 100644
--- a/runtime/src/iree/builtins/ukernel/arch/riscv_64/mmt4d_riscv_64_v.c
+++ b/runtime/src/iree/builtins/ukernel/arch/riscv_64/mmt4d_riscv_64_v.c
@@ -8,6 +8,7 @@
 
 #include "iree/builtins/ukernel/arch/riscv_64/common_riscv_64.h"
 #include "iree/builtins/ukernel/arch/riscv_64/mmt4d_riscv_64_internal.h"
+#include "bme.h"
 
 IREE_UK_ATTRIBUTE_ALWAYS_INLINE static inline void
 iree_uk_mmt4d_tile_f32f32f32_1xXXx1_to_7xXXx1_riscv_64_v(
@@ -121,6 +122,87 @@ iree_uk_mmt4d_tile_f32f32f32_1xXXx1_to_7xXXx1_riscv_64_v(
   }
 }
 
+IREE_UK_ATTRIBUTE_ALWAYS_INLINE static inline void
+iree_uk_mmt4d_tile_s8s8s32_1xXXx1_to_16xXXx1_riscv_64_v(
+    void* IREE_UK_RESTRICT out_tile,
+    const void* IREE_UK_RESTRICT lhs_panel,
+    const void* IREE_UK_RESTRICT rhs_panel,
+    const iree_uk_mmt4d_params_t* params, int M0) {
+  IREE_UK_ASSERT(M0 >= 1 && M0 <= 16);
+  iree_uk_int32_t* IREE_UK_RESTRICT out_ptr = out_tile;
+  const iree_uk_int8_t* IREE_UK_RESTRICT lhs_ptr = lhs_panel;
+  const iree_uk_int8_t* IREE_UK_RESTRICT rhs_ptr = rhs_panel;
+
+  const int N0 = params->N0;
+  const int K = params->K;
+  size_t ml = M0;
+  size_t vl = N0;
+
+  // Performance case for M0=16 (LMUL=8)
+  if (M0 == 16) {
+    // init m0 to zero (LMUL=8)
+    asm volatile("vsetvli zero, %0, e32, m8, ta, ma" : : "r"(vl));
+    asm volatile("vmv.v.i v0, 0");
+    OPMVINBCAST(m0, v0);
+
+    // K-loop unrolled by 2
+    size_t k = 0;
+    while (k + 2 <= K) {
+      asm volatile("vsetvli zero, %0, e8, m2, ta, ma" : : "r"(ml));  // ml=16
+      asm volatile("vle8.v v16, (%0)" : : "r"(&lhs_ptr[k * M0]));
+      asm volatile("vsetvli zero, %0, e8, m2, ta, ma" : : "r"(vl));  // vl=N0
+      asm volatile("vle8.v v18, (%0)" : : "r"(&rhs_ptr[k * N0]));
+      VOPACC(m0, v18, v16);
+      k++;
+      asm volatile("vsetvli zero, %0, e8, m2, ta, ma" : : "r"(ml));  // ml=16
+      asm volatile("vle8.v v20, (%0)" : : "r"(&lhs_ptr[k * M0]));
+      asm volatile("vsetvli zero, %0, e8, m2, ta, ma" : : "r"(vl));  // vl=N0
+      asm volatile("vle8.v v22, (%0)" : : "r"(&rhs_ptr[k * N0]));
+      VOPACC(m0, v22, v20);
+      k++;
+    }
+    if (k < K) {
+      asm volatile("vsetvli zero, %0, e8, m2, ta, ma" : : "r"(ml));  // ml=16
+      asm volatile("vle8.v v16, (%0)" : : "r"(&lhs_ptr[k * M0]));
+      asm volatile("vsetvli zero, %0, e8, m2, ta, ma" : : "r"(vl));  // vl=N0
+      asm volatile("vle8.v v18, (%0)" : : "r"(&rhs_ptr[k * N0]));
+      VOPACC(m0, v18, v16);
+    }
+
+    // store results
+    asm volatile("vsetvli zero, %0, e32, m8, ta, ma" : : "r"(vl));
+    for (size_t r = 0; r < ml; r++) {  // ml=16
+      VMV_VR(v0, r, m0);
+      asm volatile("vse32.v v0, (%0)" : : "r"(&out_ptr[r * N0]));
+    }
+  }
+  // Tail case for M0 < 16 (using LMUL=4)
+  else {
+    // 1. Initialize accumulators to ZERO (LMUL=4)
+    asm volatile("vsetvli zero, %0, e32, m4, ta, ma" : : "r"(vl));
+    asm volatile("vmv.v.i v0, 0");
+    OPMVINBCAST(m3, v0);  // Initialize m3 to zero
+
+    // 2. Main K-loop
+    for (int k = 0; k < K; ++k) {
+      asm volatile("vsetvli zero, %0, e8, m1, ta, ma" : : "r"(ml));
+      asm volatile("vle8.v v5, (%0)" : : "r"(&lhs_ptr[k * M0]));
+
+      asm volatile("vsetvli zero, %0, e8, m1, ta, ma" : : "r"(vl));
+      asm volatile("vle8.v v4, (%0)" : : "r"(&rhs_ptr[k * N0]));
+
+      VOPACC(m3, v4, v5);
+    }
+
+    // 3. Store results
+    asm volatile("vsetvli zero, %0, e32, m4, ta, ma" : : "r"(vl));
+    for (size_t r = 0; r < ml; r++) {
+      VMV_VR(v0, r, m3);
+      asm volatile("vse32.v v0, (%0)" : : "r"(&out_ptr[r * N0]));
+    }
+  }
+}
+
 IREE_UK_MMT4D_TILE_FUNC_IMPL_FOR_M0(
     iree_uk_mmt4d_tile_f32f32f32_1xXXx1_to_7xXXx1_riscv_64_v,
     iree_uk_mmt4d_tile_f32f32f32_1xXXx1_riscv_64_v, 1)
@@ -133,3 +215,22 @@ IREE_UK_MMT4D_TILE_FUNC_IMPL_FOR_M0(
 IREE_UK_MMT4D_TILE_FUNC_IMPL_FOR_M0(
     iree_uk_mmt4d_tile_f32f32f32_1xXXx1_to_7xXXx1_riscv_64_v,
     iree_uk_mmt4d_tile_f32f32f32_7xXXx1_riscv_64_v, 7)
+
+// *** UPDATED SECTION ***
+// Point all s8s8s32 tiles to the new generic function
+IREE_UK_MMT4D_TILE_FUNC_IMPL_FOR_M0(
+    iree_uk_mmt4d_tile_s8s8s32_1xXXx1_to_16xXXx1_riscv_64_v,
+    iree_uk_mmt4d_tile_s8s8s32_1xXXx1_riscv_64_v, 1)
+IREE_UK_MMT4D_TILE_FUNC_IMPL_FOR_M0(
+    iree_uk_mmt4d_tile_s8s8s32_1xXXx1_to_16xXXx1_riscv_64_v,
+    iree_uk_mmt4d_tile_s8s8s32_2xXXx1_riscv_64_v, 2)
+IREE_UK_MMT4D_TILE_FUNC_IMPL_FOR_M0(
+    iree_uk_mmt4d_tile_s8s8s32_1xXXx1_to_16xXXx1_riscv_64_v,
+    iree_uk_mmt4d_tile_s8s8s32_4xXXx1_riscv_64_v, 4)
+IREE_UK_MMT4D_TILE_FUNC_IMPL_FOR_M0(
+    iree_uk_mmt4d_tile_s8s8s32_1xXXx1_to_16xXXx1_riscv_64_v,
+    iree_uk_mmt4d_tile_s8s8s32_8xXXx1_riscv_64_v, 8)
+// Add the new M0=16 tile
+IREE_UK_MMT4D_TILE_FUNC_IMPL_FOR_M0(
+    iree_uk_mmt4d_tile_s8s8s32_1xXXx1_to_16xXXx1_riscv_64_v,
+    iree_uk_mmt4d_tile_s8s8s32_16xXXx1_riscv_64_v, 16)
\ No newline at end of file
diff --git a/runtime/src/iree/builtins/ukernel/arch/riscv_64/query_tile_sizes_riscv_64_entry_point.c b/runtime/src/iree/builtins/ukernel/arch/riscv_64/query_tile_sizes_riscv_64_entry_point.c
index 352a0725a7ad..0f9a6d0b926e 100644
--- a/runtime/src/iree/builtins/ukernel/arch/riscv_64/query_tile_sizes_riscv_64_entry_point.c
+++ b/runtime/src/iree/builtins/ukernel/arch/riscv_64/query_tile_sizes_riscv_64_entry_point.c
@@ -19,6 +19,21 @@ iree_uk_query_matmul_tile_sizes_riscv_64_f32f32f32(
   return (iree_uk_matmul_tile_sizes_t){.M = 8, .K = 1, .N = 8};
 }
 
+static iree_uk_matmul_tile_sizes_t
+iree_uk_query_matmul_tile_sizes_riscv_64_s8s8s32(
+    const iree_uk_query_tile_sizes_2d_params_t* params) {
+#if defined(IREE_UK_BUILD_RISCV_64_V)
+  if (iree_uk_cpu_riscv_64_v(params->cpu_data)) {
+    // Corresponds to the new target M0=16.
+    // N=32 is based on a minimum-VLEN (128-bit) and the new LMUL=8.
+    // N0 = (128 bits / 32 bits_per_element) * 8_LMUL = 32.
+    return (iree_uk_matmul_tile_sizes_t){.M = 16, .K = 1, .N = 32};
+  }
+#endif
+  // generic fallback
+  return (iree_uk_matmul_tile_sizes_t){.M = 8, .K = 1, .N = 8};
+}
+
 bool iree_uk_query_matmul_tile_sizes_arch(
     const iree_uk_query_tile_sizes_2d_params_t* params,
     iree_uk_matmul_tile_sizes_t* out_matmul_tile_sizes) {
@@ -27,8 +42,12 @@ bool iree_uk_query_matmul_tile_sizes_arch(
     *out_matmul_tile_sizes =
         iree_uk_query_matmul_tile_sizes_riscv_64_f32f32f32(params);
     return true;
+  } else if (op == IREE_UK_FLAG_QUERY_TILE_SIZES_OPERATION_MATMUL_I8I8I32) {
+    *out_matmul_tile_sizes =
+        iree_uk_query_matmul_tile_sizes_riscv_64_s8s8s32(params);
+    return true;
   } else {
     // Shouldn't happen, validated earlier.
     return false;
   }
-}
+}
\ No newline at end of file