macos: Install older kernel

Because of crc-org/vfkit#11 we need to use an
older kernel with our macOS bundles.
This is fixed in macOS 13, but we want to keep compatibility with macOS
12 for a while.
With the changes made in the previous commits, this is relatively
straightforward to add.
This uses the latest 5.18 fedora kernel on M1, and latest 5.19 fedora
kernel on Intel macbooks.

createdisk-library.sh

@@ -177,6 +177,23 @@ function install_additional_packages() {
     fi
 }
 
+function downgrade_kernel() {
+    # workaround https://github.com/crc-org/vfkit/issues/11 on macOS
+    local vm_ip=$1
+    local arch=$2
+    case $arch in
+         amd64)
+            ${SSH} core@${vm_ip} "curl -L -O https://kojipkgs.fedoraproject.org/packages/kernel/5.19.17/300.fc37/x86_64/kernel-5.19.17-300.fc37.x86_64.rpm -L -O https://kojipkgs.fedoraproject.org/packages/kernel/5.19.17/300.fc37/x86_64/kernel-core-5.19.17-300.fc37.x86_64.rpm -L -O https://kojipkgs.fedoraproject.org/packages/kernel/5.19.17/300.fc37/x86_64/kernel-modules-5.19.17-300.fc37.x86_64.rpm"
+	    ;;
+	arm64)
+            ${SSH} core@${vm_ip} "curl -L -O https://kojipkgs.fedoraproject.org//packages/kernel/5.18.19/200.fc36/aarch64/kernel-5.18.19-200.fc36.aarch64.rpm -L -O https://kojipkgs.fedoraproject.org//packages/kernel/5.18.19/200.fc36/aarch64/kernel-core-5.18.19-200.fc36.aarch64.rpm -L -O https://kojipkgs.fedoraproject.org//packages/kernel/5.18.19/200.fc36/aarch64/kernel-modules-extra-5.18.19-200.fc36.aarch64.rpm"
+	    ;;
+    esac
+
+    ${SSH} core@${vm_ip} "sudo rpm-ostree override -C replace *.rpm"
+    ${SSH} core@${vm_ip} "rm *.rpm"
+}
+
 function prepare_cockpit() {
     local vm_ip=$1
 

createdisk.sh

@@ -69,6 +69,7 @@ fi
 # the content of $libvirtDestDir
 if [ -n "${SNC_GENERATE_MACOS_BUNDLE}" ]; then
     start_vm ${CRC_VM_NAME} ${VM_IP}
+    downgrade_kernel ${VM_IP} ${yq_ARCH}
     cleanup_vm_image ${CRC_VM_NAME} ${VM_IP}
 
     # Get the rhcos kernel release
@@ -80,8 +81,16 @@ if [ -n "${SNC_GENERATE_MACOS_BUNDLE}" ]; then
     # Get the rhcos ostree Hash ID
     ostree_hash=$(echo ${kernel_cmd_line} | grep -oP "(?<=${BASE_OS}-).*(?=/vmlinuz)")
 
-    # SCP the vmlinuz/initramfs from VM to Host in provided folder.
-    ${SCP} -r core@${VM_IP}:/boot/ostree/${BASE_OS}-${ostree_hash}/* $INSTALL_DIR
+    # Copy kernel/initramfs
+    # A temporary location is needed as the initramfs cannot be directly read
+    # by the 'core' user
+    ${SSH} core@${VM_IP} -- 'bash -x -s' <<EOF
+      mkdir /tmp/kernel
+      sudo cp -r /boot/ostree/${BASE_OS}-${ostree_hash}/*${kernel_release}* /tmp/kernel
+      sudo chmod 644 /tmp/kernel/initramfs*
+EOF
+    ${SCP} -r core@${VM_IP}:/tmp/kernel/* $INSTALL_DIR
+    ${SSH} core@${VM_IP} -- "sudo rm -fr /tmp/kernel"
 
     vfkitDestDir="crc_podman_vfkit_${destDirSuffix}"
     generate_vfkit_bundle "$libvirtDestDir" "$vfkitDestDir" "$INSTALL_DIR" "$kernel_release" "$kernel_cmd_line"