Ubuntu
linux-fsl-imx51 package

kexec broken on imx51

Bug #319240 reported by Michael Casadevall on 2009-01-20

This bug report is a duplicate of: Bug #517841: KEXEC support broken. Edit Remove

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	linux-fsl-imx51 (Ubuntu)	Fix Released	Wishlist	Bryan Wu

Bug Description

kexec is broken on the imx51. This is confirmed on the Babbage 1 board with v2.6.28 kernel, but still needs confirmation on the Babbage 2 and 2.5 kernels.

Original Bug Report:
The kexec call is broken because it fails to properly call the relocation stub in the kernel, leading to a hung board. This can be resolved with the following patch which corrects the calling problem, and puts machine_kexec in line with other architectures. It's been tested on the QEMU versatile kernel.

See original description

Tags:

Related branches

lp:ubuntu/lucid/linux-fsl-imx51

Revision history for this message

Michael Casadevall (mcasadevall) wrote on 2009-01-20:

kexec_patch.diff Edit (1.4 KiB, text/plain)

Revision history for this message

Leann Ogasawara (leannogasawara) wrote on 2009-01-20:

Hi Michael,

It seems Tim applied the patch this morning:

https://lists.ubuntu.com/archives/kernel-team/2009-January/004171.html

Changed in linux:
status:	New → Fix Committed

Revision history for this message

Michael Casadevall (mcasadevall) wrote on 2009-02-26:

Resetting back to Triaged, patch works on QEMU due to fluke. Still needs work.

Changed in linux:
importance:	Undecided → Medium
status:	Fix Committed → Triaged

Paul Larson (pwlars) on 2009-06-17

tags:

added: armel

Michael Casadevall (mcasadevall) on 2009-08-07

description:	updated
summary:	- kexec broken on ARM + kexec broken on imx51

Revision history for this message

Loïc Minier (lool) wrote on 2009-08-07:

Please confirm on karmic + Babbage 2.5 + 2.6.31

Changed in linux (Ubuntu):
status:	Triaged → Incomplete

Revision history for this message

Loïc Minier (lool) wrote on 2009-09-08:

Please retest with 2.6.31...

affects:	linux (Ubuntu) → linux-fsl-imx51 (Ubuntu)
Changed in linux-fsl-imx51 (Ubuntu):
assignee:	nobody → Michael Casadevall (mcasadevall)

Revision history for this message

Jerone Young (jerone) wrote on 2009-09-15:

Is their a test case or set of instructions how someone can test out this patch (in a consistent manner) ?

Revision history for this message

Michael Casadevall (mcasadevall) wrote on 2009-09-21:

To reproduce this bug, you need to have your kernel compiled with CONFIG_KEXEC and CONFIG_ATAGS. Depending on the version of kexec-tools being used, you may need to patch arch_map_entry in kexec/arch/arm/kexec-arm.c to add the armv7l uname of the kernel. kexec will throw "Unsupported machine type" if you don't.

Then simply load a vmlinux file with: kexec -l /boot/vmlinux --append=root=/dev/hda1
--initrd=/boot/initrd followed by a kexec -e

Revision history for this message

Amit Kucheria (amitk) wrote on 2009-10-02:

Are we still trying to ship a kexec-based bootloader in Karmic? If not, lowering the importance of this bug.

Changed in linux-fsl-imx51 (Ubuntu):
importance:	Medium → Wishlist

Revision history for this message

Anmar Oueja (anmar) wrote on 2009-10-14:

I think it is important that we ship it since it will streamline our kernel updating process.

Revision history for this message

Anmar Oueja (anmar) wrote on 2009-10-14:

#10

Acelan: i believe we have some patches that fix this. Can you please confirm.

Revision history for this message

Alexander Sack (asac) wrote on 2009-12-04:

#11

any update on this? Acelan? Anmar?

Revision history for this message

Bryan Wu (cooloney) wrote on 2010-02-06:

#12

Since kexec is a good and necessary feature, I will keep up to debug this.

-Bryan

Changed in linux-fsl-imx51 (Ubuntu):
assignee:	Michael Casadevall (mcasadevall) → Bryan Wu (cooloney)

Revision history for this message

Bryan Wu (cooloney) wrote on 2010-03-03:

#13

kexec is not fully supported for ARMv7, so this issue is the same as marvell dove one. And I think we can share the same fix for mvl-dove, armel-versatile and fsl-imx51.

-Bryan

Revision history for this message

Launchpad Janitor (janitor) wrote on 2010-03-09:

#14

This bug was fixed in the package linux-fsl-imx51 - 2.6.31-605.9

---------------
linux-fsl-imx51 (2.6.31-605.9) lucid; urgency=low

[ Andy Whitcroft ]

* Revert "include modules.builtin in the binary debs"
* include modules.builtin in the binary debs

[ Bryan Wu ]

  * SAUCE: IMX51: skip ATA PASS THROUGH command for USB storage disk from
    JMicron
    - LP: #499881

[ Upstream Kernel Changes ]

  * ARM: 5677/1: ARM support for
    TIF_RESTORE_SIGMASK/pselect6/ppoll/epoll_pwait
    - LP: #319729
  * leds/mc13892: Use workqueue for setting LED brightness
    - LP: #531696
  * ARM: 5882/1: ARM: Fix uncompress code compile for different defines of
    flush(void)
    - LP: #319240
  * ARM: 5884/1: arm: Fix DCC console for v7
    - LP: #319240
  * ARM: 5885/1: arm: Flush TLB entries in setup_mm_for_reboot()
    - LP: #319240
  * ARM: 5886/1: arm: Fix cpu_proc_fin() for proc-v7.S and make kexec work
    - LP: #319240
  * ARM: 5888/1: arm: Update comments in cacheflush.h and remove
    unnecessary V6 and V7 comments
    - LP: #319240
  * arm: disable L2 cache in the v7 finish function
  * arm: invalidate TLBs when enabling mmu
-- Andy Whitcroft <email address hidden> Tue, 09 Mar 2010 13:52:16 +0000