[Bug 1659618] Re: Enable ARM64 support in kexec-tools
Manoj Iyer
1659618 at bugs.launchpad.net
Tue Feb 7 16:17:28 UTC 2017
[Testing on VM]
== Default kernel on Yakkety ==
ubuntu at test:~$ uname -a
Linux test 4.8.0-37-generic #39-Ubuntu SMP Thu Jan 26 02:26:41 UTC 2017 aarch64 aarch64 aarch64 GNU/Linux
ubuntu at test:~$
== No kexec-tools for ARM64 ==
ubuntu at test:~$ sudo apt-get install kexec-tools
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package kexec-tools is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'kexec-tools' has no installation candidate
ubuntu at test:~$
== kexec-tools for yakkety with ARM64 support ==
ubuntu at test:~$ dpkg -l | grep kexec-tools
ii kexec-tools 1:2.0.10-2ubuntu1.1 arm64 tools to support fast kexec reboots
ubuntu at test:~$
== Kernel with kexec support ==
SRU pending: https://bugs.launchpad.net/bugs/1662554
ubuntu at test:~$ sudo file /boot/vmlinuz-4.8.0-38-generic
/boot/vmlinuz-4.8.0-38-generic: gzip compressed data, max compression, from Unix
ubuntu at test:~$
== Load kexec kernel on cmd line ==
ubuntu at test:~$ sudo kexec -l /boot/vmlinuz-4.8.0-38-generic --initrd=/boot/initrd.img-4.8.0-38-generic --append="root=LABEL=cloudimg-rootfs vt.handoff=7"
ubuntu at test:~$
== Kernel live boots successfully ==
test login: [ 66.553187] kexec_core: Starting new kernel
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 4.8.0-38-generic (manjo at tangerine) (gcc version 6.2.0 20161005 (Ubuntu 6.2.0-5ubuntu12) ) #40ubuntu1 SMP Mon Feb 6 21:55:35 UTC 2017 (Ubuntu 4.8.0-38.40ubuntu1-generic 4.8.17)
[ 0.000000] Boot CPU: AArch64 Processor [510f8000]
[ 0.000000] efi: Getting EFI parameters from FDT:
[ 0.000000] efi: EFI v2.50 by EDK II
[ 0.000000] efi: SMBIOS=0x5bdb0000 SMBIOS 3.0=0x58660000 PROP=0x5f714518 ACPI=0x58690000 ACPI 2.0=0x58690014
** Patch added: "Yakkety kexec-tools arm64 support"
https://bugs.launchpad.net/ubuntu/+source/kexec-tools/+bug/1659618/+attachment/4814820/+files/yakkety-kexec-tools-enable-arm64-support.patch
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https://bugs.launchpad.net/bugs/1659618
Title:
Enable ARM64 support in kexec-tools
Status in kexec-tools package in Ubuntu:
Fix Released
Status in kexec-tools source package in Xenial:
Confirmed
Status in kexec-tools source package in Yakkety:
Confirmed
Status in kexec-tools package in Debian:
Fix Released
Bug description:
[IMPACT]
* kexec-tools in Xenial (16.04) currently does not support ARM64
architecture.
* Backport support for ARM64 arch from upstream
https://github.com/horms/kexec-tools
* Majority of the patches are contained in kexec/arch/arm64/ except for
one patch that impacts purgatory and common device tree routines.
[TEST CASE]
* I built kexec-tools for ARM64 and tested it on HW using the following
testcase:
$ sudo kexec -l /boot/vmlinuz-<version>-generic
--initrd=/boot/initrd.img-<version>-generic
--command-line="root=UUID=<uuid> ro vt.handoff=7"
$ sudo kexec -e
* I was able to kexec the new kernel successfully.
* [ 6702.357899] kexec_core: Starting new kernel
[ 0.000000] Booting Linux on physical CPU 0x200
[ 0.000000] Linux version <version>-generic (buildd at bos01-arm64-008)
(gcc version 5.4.0 20160609 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.4) )
[ 0.000000] Boot CPU: AArch64 Processor [510f8000]
[REGRESSION POTENTIAL]
* Since patches are confined to arm[64] there is a low overall risk of
regression.
[OTHER INFO]
* You can find a Xenial kexec-tools package built for AMD64, i386 and
ARM64 in my PPA
https://launchpad.net/~manjo/+archive/ubuntu/kexec-tools
* This package is built using the Xenial source package for kexec-tools
with ARM64 enablement patches applied.
* Please pull the changes from my PPA package and integrate into Ubuntu
Xenial kexec-tools after review.
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