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Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig
From: |
Jason Gunthorpe |
Subject: |
Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig |
Date: |
Tue, 22 Apr 2014 11:53:25 -0600 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
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
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, (continued)
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Russell King - ARM Linux, 2014/04/16
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Nicolas Pitre, 2014/04/16
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Christopher Covington, 2014/04/17
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Nicolas Pitre, 2014/04/17
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Christopher Covington, 2014/04/17
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Peter Maydell, 2014/04/17
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Jason Gunthorpe, 2014/04/17
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Michal Simek, 2014/04/22
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Jason Gunthorpe, 2014/04/22
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Russell King - ARM Linux, 2014/04/22
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig,
Jason Gunthorpe <=
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Russell King - ARM Linux, 2014/04/22
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Arnd Bergmann, 2014/04/22
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Russell King - ARM Linux, 2014/04/22
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Arnd Bergmann, 2014/04/22
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Daniel Thompson, 2014/04/22
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Jason Gunthorpe, 2014/04/22
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Nicolas Pitre, 2014/04/22
- Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Russell King - ARM Linux, 2014/04/22
Re: [Qemu-devel] Change of TEXT_OFFSET for multi_v7_defconfig, Rob Herring, 2014/04/17