diff --git a/llvm/include/llvm/BinaryFormat/ELF.h b/llvm/include/llvm/BinaryFormat/ELF.h
--- a/llvm/include/llvm/BinaryFormat/ELF.h
+++ b/llvm/include/llvm/BinaryFormat/ELF.h
@@ -652,7 +652,8 @@
   EF_RISCV_FLOAT_ABI_SINGLE = 0x0002,
   EF_RISCV_FLOAT_ABI_DOUBLE = 0x0004,
   EF_RISCV_FLOAT_ABI_QUAD = 0x0006,
-  EF_RISCV_RVE = 0x0008
+  EF_RISCV_RVE = 0x0008,
+  EF_RISCV_TSO = 0x0010,
 };
 
 // ELF Relocation types for RISC-V
diff --git a/llvm/lib/ObjectYAML/ELFYAML.cpp b/llvm/lib/ObjectYAML/ELFYAML.cpp
--- a/llvm/lib/ObjectYAML/ELFYAML.cpp
+++ b/llvm/lib/ObjectYAML/ELFYAML.cpp
@@ -505,6 +505,7 @@
     BCaseMask(EF_RISCV_FLOAT_ABI_DOUBLE, EF_RISCV_FLOAT_ABI);
     BCaseMask(EF_RISCV_FLOAT_ABI_QUAD, EF_RISCV_FLOAT_ABI);
     BCase(EF_RISCV_RVE);
+    BCase(EF_RISCV_TSO);
     break;
   case ELF::EM_AMDGPU:
     BCaseMask(EF_AMDGPU_MACH_NONE, EF_AMDGPU_MACH);
diff --git a/llvm/test/Object/RISCV/elf-flags.yaml b/llvm/test/Object/RISCV/elf-flags.yaml
--- a/llvm/test/Object/RISCV/elf-flags.yaml
+++ b/llvm/test/Object/RISCV/elf-flags.yaml
@@ -2,10 +2,11 @@
 # RUN: llvm-readobj --file-headers %t | FileCheck -check-prefix=OBJ %s
 # RUN: obj2yaml %t | FileCheck -check-prefix=YAML %s
 
-# OBJ: Flags [ (0xD)
+# OBJ: Flags [ (0x1D)
 # OBJ-NEXT:   EF_RISCV_FLOAT_ABI_DOUBLE (0x4)
 # OBJ-NEXT:   EF_RISCV_RVC (0x1)
 # OBJ-NEXT:   EF_RISCV_RVE (0x8)
+# OBJ-NEXT:   EF_RISCV_TSO (0x10)
 # OBJ-NEXT: ]
 
 # YAML:      FileHeader:
@@ -13,7 +14,7 @@
 # YAML-NEXT:   Data:            ELFDATA2LSB
 # YAML-NEXT:   Type:            ET_EXEC
 # YAML-NEXT:   Machine:         EM_RISCV
-# YAML-NEXT:   Flags:           [ EF_RISCV_RVC, EF_RISCV_FLOAT_ABI_DOUBLE, EF_RISCV_RVE ]
+# YAML-NEXT:   Flags:           [ EF_RISCV_RVC, EF_RISCV_FLOAT_ABI_DOUBLE, EF_RISCV_RVE, EF_RISCV_TSO ]
 
 --- !ELF
 FileHeader:
@@ -21,4 +22,4 @@
   Data:            ELFDATA2LSB
   Type:            ET_EXEC
   Machine:         EM_RISCV
-  Flags:           [ EF_RISCV_RVC, EF_RISCV_FLOAT_ABI_DOUBLE, EF_RISCV_RVE ]
+  Flags:           [ EF_RISCV_RVC, EF_RISCV_FLOAT_ABI_DOUBLE, EF_RISCV_RVE, EF_RISCV_TSO ]
diff --git a/llvm/tools/llvm-readobj/ELFDumper.cpp b/llvm/tools/llvm-readobj/ELFDumper.cpp
--- a/llvm/tools/llvm-readobj/ELFDumper.cpp
+++ b/llvm/tools/llvm-readobj/ELFDumper.cpp
@@ -1567,7 +1567,8 @@
   ENUM_ENT(EF_RISCV_FLOAT_ABI_SINGLE, "single-float ABI"),
   ENUM_ENT(EF_RISCV_FLOAT_ABI_DOUBLE, "double-float ABI"),
   ENUM_ENT(EF_RISCV_FLOAT_ABI_QUAD, "quad-float ABI"),
-  ENUM_ENT(EF_RISCV_RVE, "RVE")
+  ENUM_ENT(EF_RISCV_RVE, "RVE"),
+  ENUM_ENT(EF_RISCV_TSO, "TSO"),
 };
 
 static const EnumEntry<unsigned> ElfHeaderAVRFlags[] = {