diff --git a/mlir/include/mlir/Dialect/DXSA/IR/DXSAOps.td b/mlir/include/mlir/Dialect/DXSA/IR/DXSAOps.td
index d6f4147be226..38daffa7cae3 100644
--- a/mlir/include/mlir/Dialect/DXSA/IR/DXSAOps.td
+++ b/mlir/include/mlir/Dialect/DXSA/IR/DXSAOps.td
@@ -134,6 +134,35 @@ def DXSA_TessellatorPartitioningModeAttr :
   let assemblyFormat = "$value";
 }
 
+def DXSA_InputPrimitive_Point        : I32EnumAttrCase<"point",         1>;
+def DXSA_InputPrimitive_Line         : I32EnumAttrCase<"line",          2>;
+def DXSA_InputPrimitive_Triangle     : I32EnumAttrCase<"triangle",      3>;
+def DXSA_InputPrimitive_LineAdj      : I32EnumAttrCase<"line_adj",      6>;
+def DXSA_InputPrimitive_TriangleAdj  : I32EnumAttrCase<"triangle_adj",  7>;
+foreach i = !range(1, 33) in {
+  def DXSA_InputPrimitive_Patch#i :
+      I32EnumAttrCase<"patch" # i, !add(i, 7)>;
+}
+
+def DXSA_InputPrimitive : I32EnumAttr<
+    "InputPrimitive", "geometry shader input primitive type",
+    !listconcat(
+      [DXSA_InputPrimitive_Point,
+       DXSA_InputPrimitive_Line,
+       DXSA_InputPrimitive_Triangle,
+       DXSA_InputPrimitive_LineAdj,
+       DXSA_InputPrimitive_TriangleAdj],
+      !foreach(i, !range(1, 33),
+        !cast<I32EnumAttrCase>("DXSA_InputPrimitive_Patch" # i)))> {
+  let cppNamespace = "::mlir::dxsa";
+  let genSpecializedAttr = 0;
+}
+
+def DXSA_InputPrimitiveAttr :
+    EnumAttr<DXSADialect, DXSA_InputPrimitive, "input_primitive"> {
+  let assemblyFormat = "$value";
+}
+
 //===----------------------------------------------------------------------===//
 // DXSA op definitions
 //===----------------------------------------------------------------------===//
@@ -346,4 +375,20 @@ def DXSA_DclTessellatorPartitioning
   let assemblyFormat = "$partitioningMode attr-dict";
 }
 
+def DXSA_DclInputPrimitive : DXSA_Op<"dcl_input_primitive"> {
+  let summary = "declares the shader input primitive type";
+  let description = [{
+    The `dxsa.dcl_input_primitive` operation declares the input primitive
+    type that the shader is invoked with.
+
+    Example:
+
+    ```mlir
+    dxsa.dcl_input_primitive triangle
+    ```
+  }];
+  let arguments = (ins DXSA_InputPrimitiveAttr:$type);
+  let assemblyFormat = "$type attr-dict";
+}
+
 #endif // DXSA_OPS
diff --git a/mlir/lib/Target/DXSA/BinaryParser.cpp b/mlir/lib/Target/DXSA/BinaryParser.cpp
index 81019067e5a0..2258046f6ed9 100644
--- a/mlir/lib/Target/DXSA/BinaryParser.cpp
+++ b/mlir/lib/Target/DXSA/BinaryParser.cpp
@@ -561,6 +561,13 @@ class DXBuilder {
                                                     partitioningModeAttr);
   }
 
+  Instruction buildDclInputPrimitive(dxsa::InputPrimitive inputPrimitive,
+                                     Location loc) {
+    auto inputPrimitiveAttr =
+        dxsa::InputPrimitiveAttr::get(builder.getContext(), inputPrimitive);
+    return dxsa::DclInputPrimitive::create(builder, loc, inputPrimitiveAttr);
+  }
+
 private:
   MLIRContext *context;
   ModuleOp module;
@@ -968,6 +975,15 @@ class Parser {
     return builder.buildDclTessellatorPartitioning(*partitioningMode, loc);
   }
 
+  FailureOr<Instruction> parseDclInputPrimitive(uint32_t opcodeToken,
+                                                Location loc) {
+    auto rawInputPrimitive = DECODE_D3D10_SB_GS_INPUT_PRIMITIVE(opcodeToken);
+    auto inputPrimitive = dxsa::symbolizeInputPrimitive(rawInputPrimitive);
+    if (!inputPrimitive)
+      return emitError(loc, "unknown input primitive: ") << rawInputPrimitive;
+    return builder.buildDclInputPrimitive(*inputPrimitive, loc);
+  }
+
   OptionalParseResult parseDclInstruction(uint32_t opcodeToken, Location loc,
                                           Instruction &out) {
     FailureOr<Instruction> result;
@@ -996,6 +1012,9 @@ class Parser {
     case D3D10_SB_OPCODE_DCL_GS_OUTPUT_PRIMITIVE_TOPOLOGY:
       result = parseDclOutputTopology(opcodeToken, loc);
       break;
+    case D3D10_SB_OPCODE_DCL_GS_INPUT_PRIMITIVE:
+      result = parseDclInputPrimitive(opcodeToken, loc);
+      break;
     default:
       return std::nullopt;
     }
diff --git a/mlir/test/Target/DXSA/dcl_input_primitive.mlir b/mlir/test/Target/DXSA/dcl_input_primitive.mlir
new file mode 100644
index 000000000000..886157b1fc76
--- /dev/null
+++ b/mlir/test/Target/DXSA/dcl_input_primitive.mlir
@@ -0,0 +1,41 @@
+// RUN: mlir-translate --import-dxsa-bin %S/inputs/dcl_input_primitive.bin | FileCheck %s
+
+// CHECK:      module {
+// CHECK-NEXT:   dxsa.dcl_input_primitive point
+// CHECK-NEXT:   dxsa.dcl_input_primitive line
+// CHECK-NEXT:   dxsa.dcl_input_primitive triangle
+// CHECK-NEXT:   dxsa.dcl_input_primitive line_adj
+// CHECK-NEXT:   dxsa.dcl_input_primitive triangle_adj
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch1
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch2
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch3
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch4
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch5
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch6
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch7
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch8
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch9
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch10
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch11
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch12
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch13
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch14
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch15
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch16
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch17
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch18
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch19
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch20
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch21
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch22
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch23
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch24
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch25
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch26
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch27
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch28
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch29
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch30
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch31
+// CHECK-NEXT:   dxsa.dcl_input_primitive patch32
+// CHECK-NEXT: }
diff --git a/mlir/test/Target/DXSA/inputs/dcl_input_primitive.bin b/mlir/test/Target/DXSA/inputs/dcl_input_primitive.bin
new file mode 100644
index 000000000000..ecdd641567f2
Binary files /dev/null and b/mlir/test/Target/DXSA/inputs/dcl_input_primitive.bin differ