Add xnnpack-no-sme2 flavor to Android release workflow (#16589)

Author: kirklandsign

.github/workflows/android-release-artifacts.yml

@@ -15,6 +15,7 @@ on:
         type: choice
         options:
           - "xnnpack"
+          - "xnnpack-no-sme2"
           - "vulkan"
           - "qnn"
           - "all"
@@ -102,6 +103,10 @@ jobs:
           export EXECUTORCH_BUILD_VULKAN=ON
         fi
 
+        if [[ "$FLAVOR" == "xnnpack-no-sme2" ]]; then
+          export XNNPACK_ENABLE_ARM_SME2=OFF
+        fi
+
         if [[ "$FLAVOR" == "qnn" || "$FLAVOR" == "all" ]]; then
           PYTHON_EXECUTABLE=python bash .ci/scripts/setup-qnn-deps.sh
           PYTHON_EXECUTABLE=python bash .ci/scripts/build-qnn-sdk.sh

backends/xnnpack/cmake/Dependencies.cmake

@@ -42,6 +42,8 @@ set(XNNPACK_ENABLE_AVX512VNNIGFNI
     OFF
     CACHE BOOL ""
 )
+# Enable ARM SME2 by default. Can be disabled with -DXNNPACK_ENABLE_ARM_SME2=OFF
+# for Android emulator compatibility, which may crash with SME2 kernels.
 set(XNNPACK_ENABLE_ARM_SME2
     ON
     CACHE BOOL ""

scripts/build_android_library.sh

@@ -33,6 +33,7 @@ build_android_native_library() {
   fi
 
   EXECUTORCH_BUILD_VULKAN="${EXECUTORCH_BUILD_VULKAN:-OFF}"
+  XNNPACK_ENABLE_ARM_SME2="${XNNPACK_ENABLE_ARM_SME2:-ON}"
 
   cmake . -DCMAKE_INSTALL_PREFIX="${CMAKE_OUT}" \
     -DCMAKE_TOOLCHAIN_FILE="${ANDROID_NDK}/build/cmake/android.toolchain.cmake" \
@@ -48,6 +49,7 @@ build_android_native_library() {
     -DEXECUTORCH_BUILD_QNN="${EXECUTORCH_BUILD_QNN}" \
     -DQNN_SDK_ROOT="${QNN_SDK_ROOT}" \
     -DEXECUTORCH_BUILD_VULKAN="${EXECUTORCH_BUILD_VULKAN}" \
+    -DXNNPACK_ENABLE_ARM_SME2="${XNNPACK_ENABLE_ARM_SME2}" \
     -DSUPPORT_REGEX_LOOKAHEAD=ON \
     -DCMAKE_BUILD_TYPE="${EXECUTORCH_CMAKE_BUILD_TYPE}" \
     -B"${CMAKE_OUT}"