ci: add ARM64 Kleidiai build and test support (#16462)

.github/workflows/build.yml

@@ -1515,3 +1515,29 @@ jobs:
         run: |
           vulkaninfo --summary
           GG_BUILD_VULKAN=1 bash ./ci/run.sh ~/results/llama.cpp ~/mnt/llama.cpp
+
+  ggml-ci-arm64-cpu-kleidiai:
+     runs-on: ubuntu-22.04-arm
+
+     steps:
+       - name: Clone
+         id: checkout
+         uses: actions/checkout@v4
+
+       - name: ccache
+         uses: ggml-org/ccache-action@v1.2.16
+         with:
+           key: ggml-ci-arm64-cpu-kleidiai
+           evict-old-files: 1d
+
+       - name: Dependencies
+         id: depends
+         run: |
+           sudo apt-get update
+           sudo apt-get install -y build-essential libcurl4-openssl-dev
+
+       - name: Test
+         id: ggml-ci
+         run: |
+           GG_BUILD_KLEIDIAI=1 GG_BUILD_EXTRA_TESTS_0=1 bash ./ci/run.sh ./tmp/results ./tmp/mnt
+

ci/run.sh

@@ -22,6 +22,9 @@
 # # with MUSA support
 # GG_BUILD_MUSA=1 bash ./ci/run.sh ./tmp/results ./tmp/mnt
 #
+# # with KLEIDIAI support
+# GG_BUILD_KLEIDIAI=1 bash ./ci/run.sh ./tmp/results ./tmp/mnt
+#
 
 if [ -z "$2" ]; then
     echo "usage: $0 <output-dir> <mnt-dir>"
@@ -115,6 +118,34 @@ if [ ! -z ${GG_BUILD_NO_SVE} ]; then
     CMAKE_EXTRA="${CMAKE_EXTRA} -DGGML_NATIVE=OFF -DGGML_CPU_ARM_ARCH=armv8.5-a+fp16+i8mm"
 fi
 
+if [ -n "${GG_BUILD_KLEIDIAI}" ]; then
+    echo ">>===== Enabling KleidiAI support"
+
+    CANDIDATES=("armv9-a+dotprod+i8mm" "armv8.6-a+dotprod+i8mm" "armv8.2-a+dotprod")
+    CPU=""
+
+    for cpu in "${CANDIDATES[@]}"; do
+        if echo 'int main(){}' | ${CXX:-c++} -march="$cpu" -x c++ - -c -o /dev/null >/dev/null 2>&1; then
+            CPU="$cpu"
+            break
+        fi
+    done
+
+    if [ -z "$CPU" ]; then
+        echo "ERROR: None of the required ARM baselines (armv9/armv8.6/armv8.2 + dotprod) are supported by this compiler."
+        exit 1
+    fi
+
+    echo ">>===== Using ARM baseline: ${CPU}"
+
+    CMAKE_EXTRA="${CMAKE_EXTRA:+$CMAKE_EXTRA } \
+        -DGGML_NATIVE=OFF \
+        -DGGML_CPU_KLEIDIAI=ON \
+        -DGGML_CPU_AARCH64=ON \
+        -DGGML_CPU_ARM_ARCH=${CPU} \
+        -DBUILD_SHARED_LIBS=OFF"
+fi
+
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