Arm backend: Add requirements.txt for arm backend (#13804)

Add requirements.txt files to handle pip installs in a more python way
of doing things. Tagged versions handled in one place instead of being
spread out in shell scripts.

Requirements-arm-tosa.txt contains what is needed for the tosa reference
model which is shared between multiple backends.

Requirements-arm-ethos-u.txt contains the vela compiler needed by the
ethos-u backend.

Requirements-arm-models-test.txt contains test models needed for
baremetal tests. The install_models_for_test.sh was keept since that its
used by gitlab ci.

Signed-off-by: [email protected]

Author: perheld

backends/arm/requirements-arm-ethos-u.txt

@@ -0,0 +1,6 @@
+# Copyright 2025 Arm Limited and/or its affiliates.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+ethos-u-vela @ git+https://gitlab.arm.com/artificial-intelligence/ethos-u/ethos-u-vela@d37febc1715edf0d236c2ff555739a8a9aadcf9a

backends/arm/requirements-arm-models-test.txt

@@ -0,0 +1,6 @@
+# Copyright 2025 Arm Limited and/or its affiliates.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+diffusers[torch] == 0.33.1

backends/arm/requirements-arm-tosa.txt

@@ -0,0 +1,9 @@
+# Copyright 2025 Arm Limited and/or its affiliates.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+ml_dtypes == 0.5.1
+flatbuffers == 24.3.25
+
+tosa-tools @ git+https://git.gitlab.arm.com/tosa/[email protected]

backends/arm/scripts/install_models_for_test.sh

@@ -5,6 +5,4 @@
 # LICENSE file in the root directory of this source tree.
 
 set -e
-
-# Install diffusers for Stable Diffusion model test
-pip install "diffusers[torch]==0.33.1"
+pip install -r backends/arm/requirements-arm-models-test.txt

backends/arm/scripts/install_reference_model.sh

@@ -70,10 +70,6 @@ else
     echo "[main] Error: only x86-64 & aarch64/arm64 architecture is supported for now!"; exit 1;
 fi
 
-# Vela
-vela_repo_url="https://gitlab.arm.com/artificial-intelligence/ethos-u/ethos-u-vela"
-vela_rev="d37febc1715edf0d236c2ff555739a8a9aadcf9a"
-
 # MLSDK dependencies
 mlsdk_manifest_dir="ml-sdk-for-vulkan-manifest"
 vulkan_sdk_bin_dir="${vulkan_sdk_base_dir}/${vulkan_sdk_version}/${ARCH}/bin"
@@ -377,8 +373,8 @@ function setup_toolchain() {
     tar xf "${toolchain_dir}.tar.xz"
 }
 
-function setup_vela() {
-    pip install ethos-u-vela@git+${vela_repo_url}@${vela_rev}
+function setup_ethos_u_tools() {
+    CMAKE_POLICY_VERSION_MINIMUM=3.5 BUILD_PYBIND=1 pip install --no-dependencies -r $et_dir/backends/arm/requirements-arm-ethos-u.txt
 }
 
 function prepend_env_in_setup_path() {
@@ -526,12 +522,11 @@ if [[ $is_script_sourced -eq 0 ]]; then
         create_setup_path
     fi
 
-    # Setup the tosa_reference_model
-    $et_dir/backends/arm/scripts/install_reference_model.sh ${root_dir}
+    # Setup the tosa_reference_model and dependencies
+    CMAKE_POLICY_VERSION_MINIMUM=3.5 BUILD_PYBIND=1 pip install --no-dependencies -r $et_dir/backends/arm/requirements-arm-tosa.txt
 
-    # Setup vela and patch in codegen fixes
     if [[ "${enable_vela}" -eq 1 ]]; then
-        setup_vela
+        setup_ethos_u_tools
     fi
 
     echo "[main] Update path by running 'source ${setup_path_script}.sh'"