diff --git a/.github/workflows/emu.yml b/.github/workflows/emu.yml
index b116b6497b..da9bdc0bf5 100644
--- a/.github/workflows/emu.yml
+++ b/.github/workflows/emu.yml
@@ -91,7 +91,8 @@ jobs:
           python3 $GITHUB_WORKSPACE/scripts/xiangshan.py --clean
       - name: Build EMU
         run: |
-          python3 $GITHUB_WORKSPACE/scripts/xiangshan.py --wave-dump $WAVE_HOME --build --threads 16 --mfc
+          python3 $GITHUB_WORKSPACE/scripts/xiangshan.py --wave-dump $WAVE_HOME --build --threads 16 --mfc \
+            --pgo $GITHUB_WORKSPACE/ready-to-run/coremark-2-iteration.bin --llvm-profdata llvm-profdata
       - name: Basic Test - cputest
         run: |
           python3 $GITHUB_WORKSPACE/scripts/xiangshan.py --wave-dump $WAVE_HOME --threads 16 --ci cputest 2> /dev/zero
@@ -152,7 +153,8 @@ jobs:
         run: |
           python3 $GITHUB_WORKSPACE/scripts/xiangshan.py --build \
             --dramsim3 /nfs/home/share/ci-workloads/DRAMsim3            \
-            --with-dramsim3 --threads 16 --mfc
+            --with-dramsim3 --threads 16 --mfc \
+            --pgo $GITHUB_WORKSPACE/ready-to-run/coremark-2-iteration.bin --llvm-profdata llvm-profdata
       - name: SPEC06 Test - mcf
         run: |
           python3 $GITHUB_WORKSPACE/scripts/xiangshan.py --wave-dump $WAVE_HOME --threads 16 --max-instr 5000000 --numa --ci mcf 2> perf.log
@@ -218,7 +220,8 @@ jobs:
           python3 $GITHUB_WORKSPACE/scripts/xiangshan.py --build \
             --num-cores 2 --emu-optimize "" \
             --dramsim3 /nfs/home/share/ci-workloads/DRAMsim3 \
-            --with-dramsim3 --threads 16 --mfc
+            --with-dramsim3 --threads 16 --mfc \
+            --pgo $GITHUB_WORKSPACE/ready-to-run/coremark-2-iteration.bin --llvm-profdata llvm-profdata
       - name: MC Test
         run: |
           python3 $GITHUB_WORKSPACE/scripts/xiangshan.py --wave-dump $WAVE_HOME --threads 16 --numa --diff ./ready-to-run/riscv64-nemu-interpreter-dual-so --ci mc-tests 2> /dev/zero
diff --git a/difftest b/difftest
index 7fd1a72f7e..9e2a8106e9 160000
--- a/difftest
+++ b/difftest
@@ -1 +1 @@
-Subproject commit 7fd1a72f7ee8eed517e64102be3868c9ede16c5a
+Subproject commit 9e2a8106e98e445402ea859b23aecc1d89690df4
diff --git a/scripts/xiangshan.py b/scripts/xiangshan.py
index 6210a220c6..983c5434e6 100644
--- a/scripts/xiangshan.py
+++ b/scripts/xiangshan.py
@@ -25,7 +25,7 @@
 import subprocess
 import sys
 import time
-
+import shlex
 import psutil
 
 
@@ -94,6 +94,10 @@ def __init__(self, args):
         self.fork = not args.disable_fork
         self.disable_diff = args.no_diff
         self.disable_db = args.no_db
+        self.pgo = args.pgo
+        self.pgo_max_cycle = args.pgo_max_cycle
+        self.pgo_emu_args = args.pgo_emu_args
+        self.llvm_profdata = args.llvm_profdata
         # wave dump path
         if args.wave_dump is not None:
             self.set_wave_home(args.wave_dump)
@@ -133,9 +137,14 @@ def get_makefile_args(self):
             (self.is_mfc,        "MFC"),
             (self.emu_optimize,  "EMU_OPTIMIZE"),
             (self.xprop,         "ENABLE_XPROP"),
-            (self.with_chiseldb, "WITH_CHISELDB")
+            (self.with_chiseldb, "WITH_CHISELDB"),
+            (self.pgo,           "PGO_WORKLOAD"),
+            (self.pgo_max_cycle, "PGO_MAX_CYCLE"),
+            (self.pgo_emu_args,  "PGO_EMU_ARGS"),
+            (self.llvm_profdata, "LLVM_PROFDATA"),
         ]
         args = filter(lambda arg: arg[0] is not None, makefile_args)
+        args = [(shlex.quote(str(arg[0])), arg[1]) for arg in args] # shell escape
         return args
 
     def get_emu_args(self):
@@ -511,6 +520,10 @@ def get_free_cores(n):
     parser.add_argument('--ram-size', nargs='?', type=str, help='manually set simulation memory size (8GB by default)')
     # both makefile and emu arguments
     parser.add_argument('--no-db', action='store_true', help='disable chiseldb dump')
+    parser.add_argument('--pgo', nargs='?', type=str, help='workload for pgo (null to disable pgo)')
+    parser.add_argument('--pgo-max-cycle', nargs='?', default=400000, type=int, help='maximun cycle to train pgo')
+    parser.add_argument('--pgo-emu-args', nargs='?', default='--no-diff', type=str, help='emu arguments for pgo')
+    parser.add_argument('--llvm-profdata', nargs='?', type=str, help='corresponding llvm-profdata command of clang to compile emu, do not set with GCC')
 
     args = parser.parse_args()