Enable native AArch64 Ubuntu CI jobs for the JIT

.github/workflows/build.yml

@@ -235,10 +235,19 @@ jobs:
         free-threading:
         - false
         - true
+        os:
+        - ubuntu-24.04
+        - ubuntu-24.04-aarch64
+        is-fork:  # only used for the exclusion trick
+        - ${{ github.repository_owner != 'python' }}
+        exclude:
+        - os: ubuntu-24.04-aarch64
+          is-fork: true
     uses: ./.github/workflows/reusable-ubuntu.yml
     with:
       config_hash: ${{ needs.check_source.outputs.config_hash }}
       free-threading: ${{ matrix.free-threading }}
+      os: ${{ matrix.os }}
 
   build_ubuntu_ssltests:
     name: 'Ubuntu SSL tests with OpenSSL'

.github/workflows/jit.yml

@@ -28,7 +28,7 @@ concurrency:
 jobs:
   interpreter:
     name: Interpreter (Debug)
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     timeout-minutes: 90
     steps:
       - uses: actions/checkout@v4
@@ -85,20 +85,22 @@ jobs:
             compiler: clang
           - target: x86_64-unknown-linux-gnu/gcc
             architecture: x86_64
-            runner: ubuntu-22.04
+            runner: ubuntu-24.04
             compiler: gcc
           - target: x86_64-unknown-linux-gnu/clang
             architecture: x86_64
-            runner: ubuntu-22.04
+            runner: ubuntu-24.04
             compiler: clang
           - target: aarch64-unknown-linux-gnu/gcc
             architecture: aarch64
-            runner: ubuntu-22.04
+            runner: ubuntu-24.04-aarch64
             compiler: gcc
+            if: ${{ github.repository_owner == 'python' }}
           - target: aarch64-unknown-linux-gnu/clang
             architecture: aarch64
-            runner: ubuntu-22.04
+            runner: ubuntu-24.04-aarch64
             compiler: clang
+            if: ${{ github.repository_owner == 'python' }}
     env:
       CC: ${{ matrix.compiler }}
     steps:
@@ -123,7 +125,7 @@ jobs:
 
         # The `find` line is required as a result of https://github.com/actions/runner-images/issues/9966.
         # This is a bug in the macOS runner image where the pre-installed Python is installed in the same
-        # directory as the Homebrew Python, which causes the build to fail for macos-13. This line removes 
+        # directory as the Homebrew Python, which causes the build to fail for macos-13. This line removes
         # the symlink to the pre-installed Python so that the Homebrew Python is used instead.
       - name: Native macOS
         if: runner.os == 'macOS'
@@ -137,39 +139,18 @@ jobs:
           ./python.exe -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3
 
       - name: Native Linux
-        if: runner.os == 'Linux' && matrix.architecture == 'x86_64'
+        if: runner.os == 'Linux'
         run: |
           sudo bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)" ./llvm.sh ${{ matrix.llvm }}
           export PATH="$(llvm-config-${{ matrix.llvm }} --bindir):$PATH"
           ./configure --enable-experimental-jit ${{ matrix.debug && '--with-pydebug' || '--enable-optimizations --with-lto' }}
           make all --jobs 4
           ./python -m test --multiprocess 0 --timeout 4500 --verbose2 --verbose3
 
-      - name: Emulated Linux
-        if: runner.os == 'Linux' && matrix.architecture != 'x86_64'
-        # The --ignorefile on ./python -m test is used to exclude tests known to fail when running on an emulated Linux.
-        run: |
-          sudo bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)" ./llvm.sh ${{ matrix.llvm }}
-          export PATH="$(llvm-config-${{ matrix.llvm }} --bindir):$PATH"
-          ./configure --prefix="$(pwd)/../build"
-          make install --jobs 4
-          make clean --jobs 4
-          export HOST=${{ matrix.architecture }}-linux-gnu
-          sudo apt install --yes "gcc-$HOST" qemu-user
-          ${{ !matrix.debug && matrix.compiler == 'clang' && './configure --enable-optimizations' || '' }}
-          ${{ !matrix.debug && matrix.compiler == 'clang' && 'make profile-run-stamp --jobs 4' || '' }}
-          export QEMU_LD_PREFIX="/usr/$HOST"
-          CC="${{ matrix.compiler == 'clang' && 'clang --target=$HOST' || '$HOST-gcc' }}" \
-            CPP="$CC --preprocess" \
-            HOSTRUNNER=qemu-${{ matrix.architecture }} \
-            ./configure --enable-experimental-jit ${{ matrix.debug && '--with-pydebug' || '--with-lto' }} --build=x86_64-linux-gnu --host="$HOST" --with-build-python=../build/bin/python3 --with-pkg-config=no ac_cv_buggy_getaddrinfo=no ac_cv_file__dev_ptc=no ac_cv_file__dev_ptmx=yes
-          make all --jobs 4
-          ./python -m test --ignorefile=Tools/jit/ignore-tests-emulated-linux.txt --multiprocess 0 --timeout 4500 --verbose2 --verbose3
-
   jit-with-disabled-gil:
     name: Free-Threaded (Debug)
     needs: interpreter
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     strategy:
       matrix:
         llvm:

.github/workflows/reusable-ubuntu.yml

@@ -11,16 +11,16 @@ on:
         required: false
         type: boolean
         default: false
+      os:
+        description: OS to run the job
+        required: true
+        type: string
 
 jobs:
   build_ubuntu_reusable:
-    name: 'build and test'
+    name: build and test (${{ inputs.os }})
     timeout-minutes: 60
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-24.04, ubuntu-24.04-aarch64]
+    runs-on: ${{ inputs.os }}
     env:
       FORCE_COLOR: 1
       OPENSSL_VER: 3.0.15
@@ -42,7 +42,7 @@ jobs:
       uses: actions/cache@v4
       with:
         path: ./multissl/openssl/${{ env.OPENSSL_VER }}
-        key: ${{ matrix.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
+        key: ${{ inputs.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
     - name: Install OpenSSL
       if: steps.cache-openssl.outputs.cache-hit != 'true'
       run: python3 Tools/ssl/multissltests.py --steps=library --base-directory "$MULTISSL_DIR" --openssl "$OPENSSL_VER" --system Linux
@@ -80,18 +80,18 @@ jobs:
         --with-openssl="$OPENSSL_DIR"
         ${{ fromJSON(inputs.free-threading) && '--disable-gil' || '' }}
     - name: Build CPython out-of-tree
-      if: ${{ inputs.free-threading }}
+      if: ${{ inputs.free-threading || inputs.os != 'ubuntu-24.04-aarch64' }}
       working-directory: ${{ env.CPYTHON_BUILDDIR }}
       run: make -j
     - name: Build CPython out-of-tree (for compiler warning check)
-      if: ${{ !inputs.free-threading}}
+      if: ${{ !inputs.free-threading && inputs.os == 'ubuntu-24.04-aarch64' }}
       working-directory: ${{ env.CPYTHON_BUILDDIR }}
       run: set -o pipefail; make -j --output-sync 2>&1 | tee compiler_output_ubuntu.txt
     - name: Display build info
       working-directory: ${{ env.CPYTHON_BUILDDIR }}
       run: make pythoninfo
     - name: Check compiler warnings
-      if: ${{ !inputs.free-threading }}
+      if: ${{ !inputs.free-threading && inputs.os == 'ubuntu-24.04-aarch64' }}
       run: >-
         python Tools/build/check_warnings.py
         --compiler-output-file-path=${{ env.CPYTHON_BUILDDIR }}/compiler_output_ubuntu.txt