patch_loong64.patch

diff --git a/.ci/manywheel/build.sh b/.ci/manywheel/build.sh
index 2f4abd2..06aaf77 100755
--- a/.ci/manywheel/build.sh
+++ b/.ci/manywheel/build.sh
@@ -6,7 +6,7 @@ SCRIPTPATH="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 PYTORCH_ROOT="${PYTORCH_ROOT:-$(cd "${SCRIPTPATH}/../.." && pwd)}"
 
 case "${GPU_ARCH_TYPE:-BLANK}" in
-    cuda|cuda-aarch64|cpu|cpu-aarch64|cpu-cxx11-abi|xpu|rocm)
+    cuda|cuda-aarch64|cpu|cpu-aarch64|cpu-loongarch64|cpu-cxx11-abi|xpu|rocm)
         # New pipeline: pyproject-driven build via `python -m build`
         # then patchelf-based wheel repair.
         source "${SCRIPTPATH}/set_desired_python.sh"
diff --git a/.ci/manywheel/build_common.sh b/.ci/manywheel/build_common.sh
index cd20c07..ba9aac5 100644
--- a/.ci/manywheel/build_common.sh
+++ b/.ci/manywheel/build_common.sh
@@ -41,6 +41,9 @@ if [[ "$OS_NAME" == *"AlmaLinux"* ]]; then
         aarch64)
             PLATFORM="manylinux_2_28_aarch64"
             ;;
+        loongarch64)
+            PLATFORM="manylinux_2_38_loongarch64"
+            ;;
         *)
             echo "Other architectures: $ARCH, not setting PLATFORM"
             ;;
@@ -115,6 +118,7 @@ if [[ -z "$PYTORCH_ROOT" ]]; then
     exit 1
 fi
 pushd "$PYTORCH_ROOT"
+retry pip install -U pip
 retry pip install -qUr requirements-build.txt
 python setup.py clean
 retry pip install -qr requirements.txt
@@ -382,6 +386,10 @@ for pkg in /$WHEELHOUSE_DIR/torch_no_python*.whl /$WHEELHOUSE_DIR/torch*linux*.w
         wheel_file=$(echo $(basename $pkg) | sed -e 's/-cp.*$/.dist-info\/WHEEL/g')
         sed -i -e s#linux_aarch64#"${PLATFORM}"# $wheel_file;
     fi
+    if [[ $PLATFORM == "manylinux_2_38_loongarch64" ]]; then
+        wheel_file=$(echo $(basename $pkg) | sed -e 's/-cp.*$/.dist-info\/WHEEL/g')
+        sed -i -e s#linux_loongarch64#"${PLATFORM}"# $wheel_file;
+    fi
 
     # regenerate the RECORD file with new hashes
     record_file=$(echo $(basename $pkg) | sed -e 's/-cp.*$/.dist-info\/RECORD/g')
@@ -434,6 +442,11 @@ for pkg in /$WHEELHOUSE_DIR/torch_no_python*.whl /$WHEELHOUSE_DIR/torch*linux*.w
         zip -rq $pkg_name $PREIX*
         rm -f $pkg
         mv $pkg_name $(dirname $pkg)/$pkg_name
+    elif [[ $PLATFORM == "manylinux_2_38_loongarch64" ]]; then
+        pkg_name=$(echo $(basename $pkg) | sed -e s#linux_loongarch64#"${PLATFORM}"#)
+        zip -rq $pkg_name $PREIX*
+        rm -f $pkg
+        mv $pkg_name $(dirname $pkg)/$pkg_name
     else
         # zip up the wheel back
         zip -rq $(basename $pkg) $PREIX*
diff --git a/.ci/manywheel/build_env_setup.py b/.ci/manywheel/build_env_setup.py
index a72b7e4..d285170 100755
--- a/.ci/manywheel/build_env_setup.py
+++ b/.ci/manywheel/build_env_setup.py
@@ -186,6 +186,7 @@ ROCM_BUILD_ENV_STATIC: dict[str, str] = {
 PLATFORM_TAGS: dict[str, str] = {
     "x86_64": "manylinux_2_28_x86_64",
     "aarch64": "manylinux_2_28_aarch64",
+    "loongarch64": "manylinux_2_38_loongarch64",
 }
 
 
@@ -453,7 +454,7 @@ def main() -> None:
         setup_cuda(cuda_version)
         env_out.update(cuda_build_env(cuda_version, arch))
         print(f"CUDA {cuda_version} environment configured")
-    elif gpu_arch_type in ("cpu", "cpu-aarch64", "cpu-s390x", "cpu-cxx11-abi"):
+    elif gpu_arch_type in ("cpu", "cpu-aarch64", "cpu-loongarch64", "cpu-s390x", "cpu-cxx11-abi"):
         cleanup_cuda_for_cpu_build()
         env_out.update(CPU_BUILD_ENV)
         print("CPU environment configured")
diff --git a/.ci/manywheel/repair_wheel.py b/.ci/manywheel/repair_wheel.py
index ae964c5..a440554 100755
--- a/.ci/manywheel/repair_wheel.py
+++ b/.ci/manywheel/repair_wheel.py
@@ -419,7 +419,7 @@ def main() -> None:
             force_rpath,
         )
 
-    retag_wheels(args.output_dir, f"manylinux_2_28_{arch}")
+    retag_wheels(args.output_dir, f"manylinux_2_38_{arch}")
     repaired = list(args.output_dir.glob("*.whl"))
     print(f"Repaired {len(repaired)} wheel(s) in {args.output_dir}")
 
diff --git a/.ci/pytorch/build.sh b/.ci/pytorch/build.sh
index 855ad14..9ac66b7 100755
--- a/.ci/pytorch/build.sh
+++ b/.ci/pytorch/build.sh
@@ -232,7 +232,7 @@ fi
 
 # Do not change workspace permissions for ROCm and s390x CI jobs
 # as it can leave workspace with bad permissions for cancelled jobs
-if [[ "$BUILD_ENVIRONMENT" != *rocm* && "$BUILD_ENVIRONMENT" != *s390x* && "$BUILD_ENVIRONMENT" != *riscv64* && -d /var/lib/jenkins/workspace ]]; then
+if [[ "$BUILD_ENVIRONMENT" != *rocm* && "$BUILD_ENVIRONMENT" != *loongarch64* && "$BUILD_ENVIRONMENT" != *s390x* && "$BUILD_ENVIRONMENT" != *riscv64* && -d /var/lib/jenkins/workspace ]]; then
   # Workaround for dind-rootless userid mapping (https://github.com/pytorch/ci-infra/issues/96)
   WORKSPACE_ORIGINAL_OWNER_ID=$(stat -c '%u' "/var/lib/jenkins/workspace")
   cleanup_workspace() {
@@ -439,6 +439,6 @@ if [[ "$BUILD_ENVIRONMENT" != *libtorch* ]]; then
   PYTHONPATH=. python tools/stats/export_test_times.py
 fi
 # don't do this for s390x or riscv64 as they don't use sccache
-if [[ "$BUILD_ENVIRONMENT" != *s390x* && "$BUILD_ENVIRONMENT" != *riscv64* ]]; then
+if [[ "$BUILD_ENVIRONMENT" != *loongarch64* && "$BUILD_ENVIRONMENT" != *s390x* && "$BUILD_ENVIRONMENT" != *riscv64* ]]; then
   print_sccache_stats
 fi