kernel-install: add new kernel to xen.cfg for xen.efi

QubesOS/qubes-issues#794

rpm_spec/core-dom0-linux.spec

@@ -151,6 +151,7 @@ install -m 644 system-config/00-qubes-ignore-devices.rules $RPM_BUILD_ROOT/etc/u
 install -m 644 system-config/60-persistent-storage.rules $RPM_BUILD_ROOT/etc/udev/rules.d/
 install -m 644 -D system-config/disable-lesspipe $RPM_BUILD_ROOT/etc/profile.d/zz-disable-lesspipe
 install -m 755 -D system-config/kernel-grub2.install $RPM_BUILD_ROOT/usr/lib/kernel/install.d/90-grub2.install
+install -m 755 -D system-config/kernel-xen-efi.install $RPM_BUILD_ROOT/usr/lib/kernel/install.d/90-xen-efi.install
 install -m 755 -D system-config/kernel-remove-bls.install $RPM_BUILD_ROOT/usr/lib/kernel/install.d/99-remove-bls.install
 
 ### Icons
@@ -276,6 +277,7 @@ chmod -x /etc/grub.d/10_linux
 
 %files kernel-install
 /usr/lib/kernel/install.d/90-grub2.install
+/usr/lib/kernel/install.d/90-xen-efi.install
 /usr/lib/kernel/install.d/99-remove-bls.install
 
 %changelog

system-config/kernel-xen-efi.install

@@ -0,0 +1,84 @@
+#!/bin/sh
+
+set -e
+
+COMMAND="$1"
+KVER="$2"
+
+ESP_MOUNTPOINT=/boot/efi
+EFI_DIR="$ESP_MOUNTPOINT/qubes"
+
+if [ ! -d "$EFI_DIR" ]; then
+    # non-EFI system
+    exit 0;
+fi
+
+case "$COMMAND" in
+    add)
+        # take the default section and use it as a template for the new entry
+        awk -F = --assign "kver=${KVER}" '
+          /^\[/ {
+              # section header - previous section (if any) ended
+
+              # if default section already processed, that is all
+              if (in_default) exit;
+              in_global=0; 
+              in_default=0; 
+          } 
+          /\[global\]/ { 
+              in_global=1; 
+          }
+          /^\[/ {
+              if ("[" default_name "]" == $0) {
+                  in_default=1;
+                  print "[" kver "]";
+                  next;
+              }
+          }
+          /^default=/ {
+              if (in_global)
+                  default_name=$2;
+          }
+          /^kernel=/ {
+              if (in_default) {
+                  sub("=[^ ]*", "=vmlinuz-" kver);
+              }
+          }
+          /^ramdisk=/ {
+              if (in_default) {
+                  sub("=[^ ]*", "=initramfs-" kver ".img");
+              }
+          }
+          {
+              if (in_default) {
+                  print;
+              }
+          }' $EFI_DIR/xen.cfg >> $EFI_DIR/xen.cfg
+        
+        # then change the default
+        sed -e "s/default=.*/default=$KVER/" -i $EFI_DIR/xen.cfg
+
+        dracut -f "$EFI_DIR/initramfs-${KVER}.img" "$KVER"
+        ;;
+    remove)
+        # don't care about changing default= line - yum should prevent removing
+        # currently running kernel
+        awk -F = --assign "kver=${KVER}" '
+          /^\[/ {
+              # section header - previous section (if any) ended
+
+              in_current=0; 
+          } 
+          /^\[/ {
+              if ($0 == "[" kver "]")
+                  in_current=1;
+          }
+          {
+              if (!in_current) {
+                  print;
+              }
+          }' $EFI_DIR/xen.cfg > $EFI_DIR/xen.cfg.new
+          mv $EFI_DIR/xen.cfg.new $EFI_DIR/xen.cfg
+        rm -f "$EFI_DIR/initramfs-${KVER}.img"
+        ;;
+esac