Import QEMU upstream snapshot d2e570c

Upstream: https://gitlab.com/qemu-project/qemu.git

Upstream-Commit: d2e570cc0f97b936902a5b1b86b73c0f5998b475

.github/workflows/lockdown.yml

@@ -0,0 +1,30 @@
+# Configuration for Repo Lockdown - https://github.com/dessant/repo-lockdown
+
+name: 'Repo Lockdown'
+
+on:
+  pull_request_target:
+    types: opened
+
+permissions:
+  pull-requests: write
+
+jobs:
+  action:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/repo-lockdown@v2
+        with:
+          pr-comment: |
+            Thank you for your interest in the QEMU project.
+
+            This repository is a read-only mirror of the project's repostories hosted
+            on https://gitlab.com/qemu-project/qemu.git.
+            The project does not process merge requests filed on GitHub.
+
+            QEMU welcomes contributions of code (either fixing bugs or adding new
+            functionality). However, we get a lot of patches, and so we have some
+            guidelines about contributing on the project website:
+            https://www.qemu.org/contribute/
+          lock-pr: true
+          close-pr: true