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From: Vivek Goyal <vgoyal@redhat.com>
To: Jeremy Kerr <jk@ozlabs.org>
Cc: kexec@lists.infradead.org
Subject: Re: [PATCH 0/8] kexec build system updates, to allow cross-kexec()ing
Date: Tue, 18 Dec 2007 18:25:58 -0500	[thread overview]
Message-ID: <20071218232558.GA14092@redhat.com> (raw)
In-Reply-To: <1197967675.854275.930419561848.0.gpush@pokey>

On Tue, Dec 18, 2007 at 05:47:55PM +0900, Jeremy Kerr wrote:
> Hi all,
> 
> This series of patches is aimed at simplifying the kexec build system,
> mainly in order to make cross-compilation much easier.
> 
> As well as cross-compiling, this makes it possible to separate the
> 'host' architecture (ie, the arch of the kexec binary built), and the
> 'target' architecture (ie, the arch of the kernel that we're kexecing).
> We can specify these with the standard --host and --target arguments
> to configure.
> 

Hi Jermey,

I got a stupid question.

- What's the advantage of building a 32bit binary for powerpc64 bit
  platforms? IOW, why do you need to build 32bit purgatory? Can't we
  launch 32bit kernel from 64bit purgatory?

> This allows us to kexec a powerpc64 kernel from a powerpc userspace.
> x86{,_64} users might find this handy too, but I don't have hardware
> to test.

I think x86 it already happens. I think I can launch 64bit kernel from
a 32bit kexec.

Thanks
Vivek

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  parent reply	other threads:[~2007-12-18 23:26 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-12-18  8:47 [PATCH 0/8] kexec build system updates, to allow cross-kexec()ing Jeremy Kerr
2007-12-18  8:47 ` [PATCH 3/8] Consolidate BOOTLOADER defines Jeremy Kerr
2007-12-18  8:47 ` [PATCH 8/8] Don't assume we can re-make Makefile Jeremy Kerr
2007-12-18  8:47 ` [PATCH 2/8] Use --target for target architecture specification Jeremy Kerr
2007-12-18  8:47 ` [PATCH 7/8] removed partially duplicated system headers Jeremy Kerr
2007-12-18  8:47 ` [PATCH 4/8] Use config.h for defines Jeremy Kerr
2007-12-18  8:47 ` [PATCH 1/8] Enable building a 32 bit binary for ppc64 platforms Jeremy Kerr
2007-12-19  6:02   ` Geoff Levand
2007-12-18  8:47 ` [PATCH 5/8] Add gamecube to config.h defines Jeremy Kerr
2007-12-18  8:47 ` [PATCH 6/8] Build system simplification/standardisation Jeremy Kerr
2007-12-18 23:25 ` Vivek Goyal [this message]
2007-12-19  5:37   ` [PATCH 0/8] kexec build system updates, to allow cross-kexec()ing Jeremy Kerr
2007-12-19 14:38   ` Lombard, David N
2007-12-19 14:45     ` Vivek Goyal
2007-12-19  6:04 ` Simon Horman

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