PS3: Strange issue with kexec and FreeBSD loader
Phileas Fogg
phileas-fogg at mail.ru
Thu Feb 21 07:43:04 EST 2013
Phileas Fogg wrote:
> Phileas Fogg wrote:
>> I could finally find the commit which broke FreeBSD booting in linux-stable.git
>> repository.
>> The Linux 3.4-rc1 seems to have this problem already.
>>
>> --------------
>> commit 5375871d432ae9fc581014ac117b96aaee3cd0c7
>> Merge: b57cb72 dfbc2d7
>> Author: Linus Torvalds <torvalds at linux-foundation.org>
>> Date: Wed Mar 21 18:55:10 2012 -0700
>>
>> Merge branch 'next' of
>> git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
>>
>> Pull powerpc merge from Benjamin Herrenschmidt:
>> "Here's the powerpc batch for this merge window. It is going to be a
>> bit more nasty than usual as in touching things outside of
>> arch/powerpc mostly due to the big iSeriesectomy :-) We finally got
>> rid of the bugger (legacy iSeries support) which was a PITA to
>> maintain and that nobody really used anymore.
>>
>> Here are some of the highlights:
>>
>> - Legacy iSeries is gone. Thanks Stephen ! There's still some bits
>> and pieces remaining if you do a grep -ir series arch/powerpc but
>> they are harmless and will be removed in the next few weeks
>> hopefully.
>>
>> - The 'fadump' functionality (Firmware Assisted Dump) replaces the
>> previous (equivalent) "pHyp assisted dump"... it's a rewrite of a
>> mechanism to get the hypervisor to do crash dumps on pSeries, the
>> new implementation hopefully being much more reliable. Thanks
>> Mahesh Salgaonkar.
>>
>> - The "EEH" code (pSeries PCI error handling & recovery) got a big
>> spring cleaning, motivated by the need to be able to implement a
>> new backend for it on top of some new different type of firwmare.
>>
>> The work isn't complete yet, but a good chunk of the cleanups is
>> there. Note that this adds a field to struct device_node which is
>> not very nice and which Grant objects to. I will have a patch soon
>> that moves that to a powerpc private data structure (hopefully
>> before rc1) and we'll improve things further later on (hopefully
>> getting rid of the need for that pointer completely). Thanks Gavin
>> Shan.
>>
>> - I dug into our exception & interrupt handling code to improve the
>> way we do lazy interrupt handling (and make it work properly with
>> "edge" triggered interrupt sources), and while at it found & fixed
>> a wagon of issues in those areas, including adding support for page
>> fault retry & fatal signals on page faults.
>>
>> - Your usual random batch of small fixes & updates, including a bunch
>> of new embedded boards, both Freescale and APM based ones, etc..."
>>
>> I fixed up some conflicts with the generalized irq-domain changes from
>> Grant Likely, hopefully correctly.
>>
>> * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
>> (141 commits)
>> powerpc/ps3: Do not adjust the wrapper load address
>> powerpc: Remove the rest of the legacy iSeries include files
>> powerpc: Remove the remaining CONFIG_PPC_ISERIES pieces
>> init: Remove CONFIG_PPC_ISERIES
>> powerpc: Remove FW_FEATURE ISERIES from arch code
>> tty/hvc_vio: FW_FEATURE_ISERIES is no longer selectable
>> powerpc/spufs: Fix double unlocks
>> powerpc/5200: convert mpc5200 to use of_platform_populate()
>> powerpc/mpc5200: add options to mpc5200_defconfig
>> powerpc/mpc52xx: add a4m072 board support
>> powerpc/mpc5200: update mpc5200_defconfig to fit for charon board
>> Documentation/powerpc/mpc52xx.txt: Checkpatch cleanup
>> powerpc/44x: Add additional device support for APM821xx SoC and Bluestone
>> board
>> powerpc/44x: Add support PCI-E for APM821xx SoC and Bluestone board
>> MAINTAINERS: Update PowerPC 4xx tree
>> powerpc/44x: The bug fixed support for APM821xx SoC and Bluestone board
>> powerpc: document the FSL MPIC message register binding
>> powerpc: add support for MPIC message register API
>> powerpc/fsl: Added aliased MSIIR register address to MSI node in dts
>> powerpc/85xx: mpc8548cds - add 36-bit dts
>> ...
>>
>> _______________________________________________
>> Linuxppc-dev mailing list
>> Linuxppc-dev at lists.ozlabs.org
>> https://lists.ozlabs.org/listinfo/linuxppc-dev
>
> Reverting this commit fixes the problem with SHA256 checkusm in the purgatory
> code too. I'm trying to find out which commit exactly caused the problem.
>
> regards
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev at lists.ozlabs.org
> https://lists.ozlabs.org/listinfo/linuxppc-dev
I found the single commit which brakes kexec stuff for FreeBSD loader or other
custom ELF kernels on the PS3 console.
From 7230c5644188cd9e3fb380cc97dde00c464a3ba7 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Date: Tue, 6 Mar 2012 18:27:59 +1100
Subject: [PATCH] powerpc: Rework lazy-interrupt handling
regards
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