main/grub: fix booting Xen under EFI

Need to use multiboot2 while booting Xen under EFI, and not multiboot as
is used when generating grub.cfg with grub-mkconfig.

Backport commits included in upstream Grub 2.04.

Diskless setups are not affected, as grub.cfg is generated manually by
the mkimage scipts.

(cherry picked from commit 6b9be75ec9776ac0f8ced9d888106194ae61b4f0)

4 files changed, 195 insertions, 2 deletions

diff --git a/main/grub/0001-util-grub.d-20_linux_xen.in-Add-xen_boot-command-sup.patch b/main/grub/0001-util-grub.d-20_linux_xen.in-Add-xen_boot-command-sup.patch
new file mode 100644
index 0000000000..350180b49a
--- /dev/null
+++ b/main/grub/0001-util-grub.d-20_linux_xen.in-Add-xen_boot-command-sup.patch
@@ -0,0 +1,64 @@
+From cb8fc4eee92e19fe2977026ba45bad6ecf68f55f Mon Sep 17 00:00:00 2001
+From: Fu Wei <fu.wei@linaro.org>
+Date: Sun, 14 May 2017 15:43:46 +0800
+Subject: [PATCH 1/3] util/grub.d/20_linux_xen.in: Add xen_boot command support
+ for aarch64
+
+This patch adds the support of xen_boot command for aarch64:
+    xen_hypervisor
+    xen_module
+These two commands are only for aarch64, since it has its own protocol and
+commands to boot xen hypervisor and Dom0, but not multiboot.
+
+For other architectures, they are still using multiboot and module
+commands.
+
+Signed-off-by: Fu Wei <fu.wei@linaro.org>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+(cherry picked from commit d33045ce7ffcb7c1e4a60c14d5ca64b36e3c5abe)
+---
+ util/grub.d/20_linux_xen.in | 14 +++++++++++---
+ 1 file changed, 11 insertions(+), 3 deletions(-)
+
+diff --git a/util/grub.d/20_linux_xen.in b/util/grub.d/20_linux_xen.in
+index c48af948d..c002fc9f9 100644
+--- a/util/grub.d/20_linux_xen.in
++++ b/util/grub.d/20_linux_xen.in
+@@ -122,16 +122,16 @@ linux_entry ()
+         else
+             xen_rm_opts="no-real-mode edd=off"
+         fi
+-       multiboot       ${rel_xen_dirname}/${xen_basename} placeholder ${xen_args} \${xen_rm_opts}
++       ${xen_loader}   ${rel_xen_dirname}/${xen_basename} placeholder ${xen_args} \${xen_rm_opts}
+        echo    '$(echo "$lmessage" | grub_quote)'
+-       module  ${rel_dirname}/${basename} placeholder root=${linux_root_device_thisversion} ro ${args}
++       ${module_loader}        ${rel_dirname}/${basename} placeholder root=${linux_root_device_thisversion} ro ${args}
+ EOF
+   if test -n "${initrd}" ; then
+     # TRANSLATORS: ramdisk isn't identifier. Should be translated.
+     message="$(gettext_printf "Loading initial ramdisk ...")"
+     sed "s/^/$submenu_indentation/" << EOF
+        echo    '$(echo "$message" | grub_quote)'
+-       module  --nounzip   ${rel_dirname}/${initrd}
++       ${module_loader}        --nounzip   ${rel_dirname}/${initrd}
+ EOF
+   fi
+   sed "s/^/$submenu_indentation/" << EOF
+@@ -206,6 +206,14 @@ while [ "x${xen_list}" != "x" ] ; do
+     if [ "x$is_top_level" != xtrue ]; then
+        echo "  submenu '$(gettext_printf "Xen hypervisor, version %s" "${xen_version}" | grub_quote)' \$menuentry_id_option 'xen-hypervisor-$xen_version-$boot_device_id' {"
+     fi
++    $grub_file --is-arm64-efi $current_xen
++    if [ $? -ne 0 ]; then
++       xen_loader="multiboot"
++       module_loader="module"
++    else
++       xen_loader="xen_hypervisor"
++       module_loader="xen_module"
++    fi
+     while [ "x$list" != "x" ] ; do
+        linux=`version_find_latest $list`
+        gettext_printf "Found linux image: %s\n" "$linux" >&2
+-- 
+2.24.1
+
diff --git a/main/grub/0002-Fix-util-grub.d-20_linux_xen.in-Add-xen_boot-command.patch b/main/grub/0002-Fix-util-grub.d-20_linux_xen.in-Add-xen_boot-command.patch
new file mode 100644
index 0000000000..5b2b8b1a65
--- /dev/null
+++ b/main/grub/0002-Fix-util-grub.d-20_linux_xen.in-Add-xen_boot-command.patch
@@ -0,0 +1,82 @@
+From 0edfe09c35ed63630e2ccba60b9965e3d7f7f518 Mon Sep 17 00:00:00 2001
+From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+Date: Tue, 29 Aug 2017 16:40:52 -0400
+Subject: [PATCH 2/3] Fix util/grub.d/20_linux_xen.in: Add xen_boot command
+ support for aarch64
+
+Commit d33045ce7ffcb7c1e4a60c14d5ca64b36e3c5abe introduced
+the support for this, but it does not work under x86 (as it stops
+20_linux_xen from running).
+
+The 20_linux_xen is run under a shell and any exits from within it:
+
+(For example on x86):
++ /usr/bin/grub2-file --is-arm64-efi /boot/xen-4.9.0.gz
+[root@tst063 grub]# echo $?
+1
+
+will result in 20_linux_xen exiting without continuing
+and also causing grub2-mkconfig to stop processing.
+
+As in:
+
+ [root@tst063 grub]# ./grub-mkconfig | tail
+ Generating grub configuration file ...
+ Found linux image: /boot/vmlinuz-4.13.0-0.rc5.git1.1.fc27.x86_64
+ Found initrd image: /boot/initramfs-4.13.0-0.rc5.git1.1.fc27.x86_64.img
+ Found linux image: /boot/vmlinuz-0-rescue-ec082ee24aea41b9b16aca52a6d10cc2
+ Found initrd image: /boot/initramfs-0-rescue-ec082ee24aea41b9b16aca52a6d10cc2.img
+                echo    'Loading Linux 0-rescue-ec082ee24aea41b9b16aca52a6d10cc2 ...'
+                linux   /vmlinuz-0-rescue-ec082ee24aea41b9b16aca52a6d10cc2 root=/dev/mapper/fedora_tst063-root ro single
+                echo    'Loading initial ramdisk ...'
+                initrd  /initramfs-0-rescue-ec082ee24aea41b9b16aca52a6d10cc2.img
+        }
+ }
+
+ ### END /usr/local/etc/grub.d/10_linux ###
+
+ ### BEGIN /usr/local/etc/grub.d/20_linux_xen ###
+
+ root@tst063 grub]#
+
+And no more.
+
+This patch wraps the invocation of grub-file to be a in subshell
+and to process the return value in a conditional. That fixes
+the issue.
+
+RH-BZ 1486002: grub2-mkconfig does not work if xen.gz is installed.
+
+CC: Fu Wei <fu.wei@linaro.org>
+Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+(cherry picked from commit a8e0f1adf7019238fff263111794c86f4eea79ac)
+---
+ util/grub.d/20_linux_xen.in | 9 ++++-----
+ 1 file changed, 4 insertions(+), 5 deletions(-)
+
+diff --git a/util/grub.d/20_linux_xen.in b/util/grub.d/20_linux_xen.in
+index c002fc9f9..083bcef5d 100644
+--- a/util/grub.d/20_linux_xen.in
++++ b/util/grub.d/20_linux_xen.in
+@@ -206,13 +206,12 @@ while [ "x${xen_list}" != "x" ] ; do
+     if [ "x$is_top_level" != xtrue ]; then
+        echo "  submenu '$(gettext_printf "Xen hypervisor, version %s" "${xen_version}" | grub_quote)' \$menuentry_id_option 'xen-hypervisor-$xen_version-$boot_device_id' {"
+     fi
+-    $grub_file --is-arm64-efi $current_xen
+-    if [ $? -ne 0 ]; then
+-       xen_loader="multiboot"
+-       module_loader="module"
+-    else
++    if ($grub_file --is-arm64-efi $current_xen); then
+        xen_loader="xen_hypervisor"
+        module_loader="xen_module"
++    else
++       xen_loader="multiboot"
++       module_loader="module"
+     fi
+     while [ "x$list" != "x" ] ; do
+        linux=`version_find_latest $list`
+-- 
+2.24.1
+
diff --git a/main/grub/0003-Use-grub-file-to-figure-out-whether-multiboot2-shoul.patch b/main/grub/0003-Use-grub-file-to-figure-out-whether-multiboot2-shoul.patch
new file mode 100644
index 0000000000..63ade92a27
--- /dev/null
+++ b/main/grub/0003-Use-grub-file-to-figure-out-whether-multiboot2-shoul.patch
@@ -0,0 +1,40 @@
+From b4148dbeceee4a2fe4e99acdeeb86edc5e4eed01 Mon Sep 17 00:00:00 2001
+From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+Date: Tue, 29 Aug 2017 16:40:53 -0400
+Subject: [PATCH 3/3] Use grub-file to figure out whether multiboot2 should be
+ used for Xen.gz
+
+The multiboot2 is much more preferable than multiboot. Especiall
+if booting under EFI where multiboot does not have the functionality
+to pass ImageHandler.
+
+Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+(cherry picked from commit b4d709b6ee789cdaf3fa7a80fd90c721a16f48c2)
+---
+ util/grub.d/20_linux_xen.in | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/util/grub.d/20_linux_xen.in b/util/grub.d/20_linux_xen.in
+index 083bcef5d..0cb0f4e49 100644
+--- a/util/grub.d/20_linux_xen.in
++++ b/util/grub.d/20_linux_xen.in
+@@ -210,8 +210,13 @@ while [ "x${xen_list}" != "x" ] ; do
+        xen_loader="xen_hypervisor"
+        module_loader="xen_module"
+     else
+-       xen_loader="multiboot"
+-       module_loader="module"
++       if ($grub_file --is-x86-multiboot2 $current_xen); then
++           xen_loader="multiboot2"
++           module_loader="module2"
++       else
++           xen_loader="multiboot"
++           module_loader="module"
++        fi
+     fi
+     while [ "x$list" != "x" ] ; do
+        linux=`version_find_latest $list`
+-- 
+2.24.1
+
diff --git a/main/grub/APKBUILD b/main/grub/APKBUILD
index fa5ee2a54d..032cd12d17 100644
--- a/main/grub/APKBUILD
+++ b/main/grub/APKBUILD
@@ -2,7 +2,7 @@
 # Maintainer: Timo Teräs <timo.teras@iki.fi>
 pkgname=grub
 pkgver=2.02
-pkgrel=19
+pkgrel=20
 pkgdesc="Bootloader with support for Linux, Multiboot and more"
 url="https://www.gnu.org/software/grub/"
 arch="all !s390x"
@@ -66,6 +66,10 @@ source="https://ftp.gnu.org/gnu/grub/grub-$pkgver.tar.xz
         0018-xen_pvh-Support-building-a-standalone-image.patch
         0019-xen_pvh-Support-grub-install-for-xen_pvh.patch
         0020-xen_pvh-Add-support-to-configure.patch
+
+        0001-util-grub.d-20_linux_xen.in-Add-xen_boot-command-sup.patch
+        0002-Fix-util-grub.d-20_linux_xen.in-Add-xen_boot-command.patch
+        0003-Use-grub-file-to-figure-out-whether-multiboot2-shoul.patch
         "
 builddir="$srcdir/grub-$pkgver"
 
@@ -264,4 +268,7 @@ fe7ea6eeab330c0fdfd0b2a858acdff88c68f69d80b9abb21b4c3cd1d18f8717ab7c47729e28857c
 3e78cd3cd1c70236d8e9e3a536eb2f887283b5d257f60533d22d093df76c1c3c60e490acae4b738301c87edbac2e27398fce6ddbbeb9b2f193191c76afb9bd8b  0017-xen-Use-elfnote-defines-instead-of-plain-numbers.patch
 c8a16db1224c9fb4a26ef39fbd8c36bf26ff68d45d88fb4e2530369c5bccadf0208551c34c0d16e9ee4a3102d67edad26a46e7b8388222f530310762246df8ef  0018-xen_pvh-Support-building-a-standalone-image.patch
 b00cb9146cadc1f48586dcab31ac4605d9591d860283000accf709a489f136bf5c8fe3351dbefe51f9e27407ca3f1ce5dd7bc2ac64ac826f593183ef5d3a9759  0019-xen_pvh-Support-grub-install-for-xen_pvh.patch
-78bc31b69cde95a29b365b43898caf69238c036683a26e5448d66cd48c7a4906d2a9eff065f082c5300b72616d6e63033891fd75d59ce724759dc998d9942a37  0020-xen_pvh-Add-support-to-configure.patch"
+78bc31b69cde95a29b365b43898caf69238c036683a26e5448d66cd48c7a4906d2a9eff065f082c5300b72616d6e63033891fd75d59ce724759dc998d9942a37  0020-xen_pvh-Add-support-to-configure.patch
+9eb4d168824d863791040e7d288dfa2bd5314c34389adb92683b6335c5bd5426f74ec98257bcfde6ab89836ae33954ac1ad2e1caf451c2d6ab4540a4f394c985  0001-util-grub.d-20_linux_xen.in-Add-xen_boot-command-sup.patch
+b0ab04fff0d998a78d5de7610544de14912dc5ac27f99d74e86df7ef59db02ad4a45620030d1ff640d7c09d1f3aecaf7506dfb21dc01377f6a1f3d5a95c2978b  0002-Fix-util-grub.d-20_linux_xen.in-Add-xen_boot-command.patch
+34518e3917bd3fd8e5944fcb6d208515ff4f2ae2e74736eb451a532bc116a63232b8fed28ca91c2417e815d179d438795ccbf6735edcaed2c0760555635d595e  0003-Use-grub-file-to-figure-out-whether-multiboot2-shoul.patch"