diff --git a/llvm/lib/Target/RISCV/MCA/RISCVCustomBehaviour.cpp b/llvm/lib/Target/RISCV/MCA/RISCVCustomBehaviour.cpp
--- a/llvm/lib/Target/RISCV/MCA/RISCVCustomBehaviour.cpp
+++ b/llvm/lib/Target/RISCV/MCA/RISCVCustomBehaviour.cpp
@@ -63,9 +63,9 @@
       .Case("M2", 0b001)
       .Case("M4", 0b010)
       .Case("M8", 0b011)
-      .Case("MF2", 0b101)
+      .Case("MF2", 0b111)
       .Case("MF4", 0b110)
-      .Case("MF8", 0b111);
+      .Case("MF8", 0b101);
 }
 
 const llvm::StringRef RISCVSEWInstrument::DESC_NAME = "RISCV-SEW";