Change in coreboot[master]: Linuxboot: add kernel release and custom version

[Marcello Sylvester Bauer (Code Review)]

Marcello Sylvester Bauer has uploaded this change for review. ( https://review.coreboot.org/29443

Change subject: Linuxboot: add kernel release and custom version
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Linuxboot: add kernel release and custom version

Add current kernel releases instead of hardcode the version number.
Also add the option to select a custom version of the kernel.

Change-Id: Ieb071696cfbb466521faaef045fc488a06f6db0c
Signed-off-by: Marcello Sylvester Bauer 
---
M payloads/external/LinuxBoot/Kconfig
M payloads/external/LinuxBoot/Makefile
M payloads/external/Makefile.inc
3 files changed, 45 insertions(+), 10 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/43/29443/1

diff --git a/payloads/external/LinuxBoot/Kconfig b/payloads/external/LinuxBoot/Kconfig
index 8acb542..82b2748 100644
--- a/payloads/external/LinuxBoot/Kconfig
+++ b/payloads/external/LinuxBoot/Kconfig
@@ -46,25 +46,49 @@
    default "arm64" if LINUXBOOT_ARM64

choice
-	prompt "Kernel version"
+	prompt "Kernel release"
    default LINUXBOOT_KERNEL_STABLE
+	help
+	  choose the kernel release.
+
+	  select 'custom' if your want to define the kernel version.
+	  for more information about the current 'mainline', 'stable' or 'longterm'
+	  version, visit: https://www.kernel.org/
+
+config LINUXBOOT_KERNEL_MAINLINE
+	bool "mainline"
+	help
+	  mainline kernel version

config LINUXBOOT_KERNEL_STABLE
-	bool "4.14.67"
+	bool "stable"
    help
-	  Stable kernel version
+	  stable kernel version

-config LINUXBOOT_KERNEL_LATEST
-	bool "4.18.5"
+config LINUXBOOT_KERNEL_LONGTERM
+	bool "longterm"
    help
-	  Latest kernel version
+	  longterm kernel version
+
+config LINUXBOOT_KERNEL_CUSTOM
+	bool "custom"
+	help
+	  Custom kernel version

endchoice

+config LINUXBOOT_KERNEL_CUSTOM_VERSION
+	string "kernel version"
+	default ""
+	help
+	  kernel version (4.x.x)
+
 config LINUXBOOT_KERNEL_VERSION
    string
-	default "4.18.5" if LINUXBOOT_KERNEL_LATEST
-	default "4.14.67" if LINUXBOOT_KERNEL_STABLE
+	default "mainline" if LINUXBOOT_KERNEL_MAINLINE
+	default "stable" if LINUXBOOT_KERNEL_STABLE
+	default "longterm" if LINUXBOOT_KERNEL_LONGTERM
+	default "custom" if LINUXBOOT_KERNEL_CUSTOM

config LINUXBOOT_KERNEL_CONFIGFILE
    string "Kernel config file"
diff --git a/payloads/external/LinuxBoot/Makefile b/payloads/external/LinuxBoot/Makefile
index 8376805..2390ba8 100644
--- a/payloads/external/LinuxBoot/Makefile
+++ b/payloads/external/LinuxBoot/Makefile
@@ -12,7 +12,16 @@
 ## GNU General Public License for more details.
 ##

-kernel_tarball=https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-$(CONFIG_LINUXBOOT_KERNEL...
+ifeq ($(CONFIG_LINUXBOOT_KERNEL_CUSTOM),y)
+	kernel_version:=$(CONFIG_LINUXBOOT_KERNEL_CUSTOM_VERSION)
+else
+	kernel_version:=$(shell curl -s -k https://www.kernel.org/feeds/kdist.xml | \
+		sed -n -e 's@.*<guid isPermaLink="false">(.*)</guid>.*@\1@p' | \
+		head -n 3 | \
+		awk -F ',' '/$(CONFIG_LINUXBOOT_KERNEL_VERSION)/{ print $$3 }')
+endif
+
+kernel_tarball=https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-$(kernel_version).tar.xz
 project_dir=linuxboot
 kernel_dir=$(project_dir)/kernel

@@ -42,7 +51,7 @@
    fi

$(kernel_dir)/.config:
-	echo "    WWW        Download Linux $(CONFIG_LINUXBOOT_KERNEL_VERSION)"
+	echo "    WWW        Download Linux $(kernel_version) [$(CONFIG_LINUXBOOT_KERNEL_VERSION)]"
    mkdir -p $(kernel_dir)
 ifeq ("$(wildcard $(kernel_dir)/README)","")
    curl -s $(kernel_tarball) | tar xJ -C $(kernel_dir) --strip 1
diff --git a/payloads/external/Makefile.inc b/payloads/external/Makefile.inc
index c730bba..cb806b7 100644
--- a/payloads/external/Makefile.inc
+++ b/payloads/external/Makefile.inc
@@ -268,6 +268,8 @@
    $(MAKE) -C payloads/external/LinuxBoot \
    	CPUS=$(CPUS) \
    	CONFIG_LINUXBOOT_KERNEL_VERSION=$(CONFIG_LINUXBOOT_KERNEL_VERSION) \
+		CONFIG_LINUXBOOT_KERNEL_CUSTOM=$(CONFIG_LINUXBOOT_KERNEL_CUSTOM) \
+		CONFIG_LINUXBOOT_KERNEL_CUSTOM_VERSION=$(CONFIG_LINUXBOOT_KERNEL_CUSTOM_VERSION) \
    	CONFIG_LINUXBOOT_KERNEL_CONFIGFILE=$(CONFIG_LINUXBOOT_KERNEL_CONFIGFILE) \
    	CONFIG_LINUXBOOT_KERNEL_COMMANDLINE=$(CONFIG_LINUXBOOT_KERNEL_COMMANDLINE) \
    	CONFIG_LINUXBOOT_UROOT_VERSION=$(CONFIG_LINUXBOOT_UROOT_VERSION) \