From: jgunthorpe@obsidianresearch.com (Jason Gunthorpe)
To: linux-arm-kernel@lists.infradead.org
Subject: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig
Date: Tue, 22 Apr 2014 11:53:25 -0600 [thread overview]
Message-ID: <20140422175325.GD23955@obsidianresearch.com> (raw)
In-Reply-To: <20140422171141.GW24070@n2100.arm.linux.org.uk>
On Tue, Apr 22, 2014 at 06:11:42PM +0100, Russell King - ARM Linux wrote:
> Put another way, if your platform is part of the multi-platform kernel
> then you are *excluded* from being able to use this... unless you hack
> the Kconfig, and then also provide a constant value for PHYS_OFFSET,
> thereby _tying_ the kernel you built to a _single_ platform.
That is exactly right. To get a fixed LMA you must commit to a
non-relocatable kernel image.
Realistically this patch would need to be accompanied by something
that makes ARM_PATCH_PHYS_VIRT optional for multiplatform based on
EXPERT or similar.
The best usecase seems to be to support ELF tooling for low level
debugging activities, a non-relocatable image isn't a blocker for that
case.
Since the patch is a no-op if LOAD_OFFSET isn't set, is there a
downside I don't see?
Thanks,
Jason
next prev parent reply other threads:[~2014-04-22 17:53 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-15 10:44 Change of TEXT_OFFSET for multi_v7_defconfig Daniel Thompson
2014-04-15 17:53 ` Stephen Boyd
2014-04-16 16:18 ` Christopher Covington
2014-04-16 19:14 ` Nicolas Pitre
2014-04-16 21:08 ` Christopher Covington
2014-04-16 21:36 ` Peter Maydell
2014-04-16 22:34 ` Russell King - ARM Linux
2014-04-16 22:33 ` Russell King - ARM Linux
2014-04-16 23:21 ` Nicolas Pitre
2014-04-17 18:33 ` Christopher Covington
2014-04-17 19:48 ` Nicolas Pitre
2014-04-17 20:49 ` Christopher Covington
2014-04-17 20:54 ` Peter Maydell
2014-04-17 20:35 ` Jason Gunthorpe
2014-04-22 9:44 ` Daniel Thompson
2014-04-22 17:05 ` Jason Gunthorpe
2014-04-22 17:55 ` Nicolas Pitre
2014-04-22 18:36 ` Russell King - ARM Linux
2014-04-22 14:50 ` [Qemu-devel] " Michal Simek
2014-04-22 17:00 ` Jason Gunthorpe
2014-04-22 17:11 ` Russell King - ARM Linux
2014-04-22 17:53 ` Jason Gunthorpe [this message]
2014-04-22 18:12 ` Russell King - ARM Linux
2014-04-22 18:32 ` Arnd Bergmann
2014-04-22 18:38 ` Russell King - ARM Linux
2014-04-22 18:45 ` Arnd Bergmann
2014-04-17 17:11 ` Rob Herring
2014-04-17 20:06 ` Nicolas Pitre
2014-04-17 20:16 ` Russell King - ARM Linux
2014-04-17 21:18 ` Rob Herring
2014-04-17 21:35 ` Russell King - ARM Linux
2014-04-18 2:53 ` Rob Herring
2014-04-18 4:34 ` Nicolas Pitre
2014-04-22 10:26 ` Daniel Thompson
2014-04-22 10:40 ` Russell King - ARM Linux
2014-04-22 11:41 ` Daniel Thompson
2014-04-18 8:41 ` Russell King - ARM Linux
2014-04-22 9:53 ` Daniel Thompson
2014-04-22 10:07 ` Russell King - ARM Linux
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