From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: Olof Johansson <olof-nZhT3qVonbNeoWH0uzbU5w@public.gmane.org>
Cc: Santosh Shilimkar
<santosh.shilimkar-l0cyMroinI0@public.gmane.org>,
Russell King - ARM Linux
<linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>,
Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>,
Peter De Schrijver
<pdeschrijver-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>,
Bo Yan <byan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
"linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
ARM kernel mailing list
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Subject: Re: Multi-platform, and secure-only ARM errata workarounds
Date: Mon, 11 Mar 2013 12:54:00 -0600 [thread overview]
Message-ID: <20130311185400.GC10992@obsidianresearch.com> (raw)
In-Reply-To: <CAOesGMgYL19+u-bLp080iasct5xtC=qfNCoz=SY7bbVgF=7JQg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Sun, Mar 10, 2013 at 11:47:31AM -0700, Olof Johansson wrote:
> If we already have to use appended DTB on these systems, then we
> already have a need to wrap the kernel in a per-system image (i.e. by
> appending the DTB to the kernel and booting that). If we're already
> doing that, we could just as well add a wrapper around the whole thing
> that enables the errata before launching the zimage.
What about bundling the DTB and a block of asm code to do 'CPU
startup' together somehow? If it was easy to locate the code in the
bundle then it could be jumped to directly from the vmlinux pre-mmu
startup code, from the secondary CPU startup, and from the CPU wake up
as well.
The tool to generate this bundle could generate and compile the asm
code based on an errata list in the DTB itself..
Regards,
Jason
prev parent reply other threads:[~2013-03-11 18:54 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-25 23:47 Multi-platform, and secure-only ARM errata workarounds Stephen Warren
2013-02-26 9:36 ` Marc Dietrich
[not found] ` <4928288.ie8EUukfVD-D3pzGp0ZKuDWZbiwp4sFPyrtisivX6KghOMvlBiLbJSELgA04lAiVw@public.gmane.org>
2013-02-26 16:39 ` Stephen Warren
[not found] ` <512CE533.6020005-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-02-26 22:31 ` Nicolas Pitre
2013-02-27 9:03 ` Marc Dietrich
[not found] ` <22709540.96uJddbx1U-D3pzGp0ZKuDWZbiwp4sFPyrtisivX6KghOMvlBiLbJSELgA04lAiVw@public.gmane.org>
2013-02-27 14:00 ` Rob Herring
2013-02-27 17:42 ` Stephen Warren
2013-02-28 13:58 ` Marc Dietrich
[not found] ` <512BF81A.3080700-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-02-26 10:23 ` Arnd Bergmann
[not found] ` <201302261023.26939.arnd-r2nGTMty4D4@public.gmane.org>
2013-02-26 10:31 ` Catalin Marinas
[not found] ` <20130226103114.GA16875-5wv7dgnIgG8@public.gmane.org>
2013-02-26 10:35 ` Catalin Marinas
[not found] ` <20130226103503.GB16875-5wv7dgnIgG8@public.gmane.org>
2013-02-26 10:48 ` Arnd Bergmann
[not found] ` <201302261048.06644.arnd-r2nGTMty4D4@public.gmane.org>
2013-02-26 11:11 ` Catalin Marinas
2013-02-26 11:35 ` Russell King - ARM Linux
[not found] ` <20130226113538.GS17833-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2013-02-26 14:07 ` Rob Herring
2013-02-26 18:01 ` Stephen Warren
[not found] ` <512CF87A.4090404-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-02-26 18:11 ` Russell King - ARM Linux
[not found] ` <20130226181114.GU17833-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2013-02-26 18:30 ` Stephen Warren
[not found] ` <512CFF30.9080300-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-02-26 18:49 ` Russell King - ARM Linux
[not found] ` <20130226184942.GV17833-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2013-02-27 6:07 ` Santosh Shilimkar
2013-03-01 17:37 ` Stephen Warren
[not found] ` <5130E757.6090500-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-03-01 18:05 ` Russell King - ARM Linux
2013-03-04 6:34 ` Peter De Schrijver
[not found] ` <20130304063436.GB27241-Rysk9IDjsxmJz7etNGeUX8VPkgjIgRvpAL8bYrjMMd8@public.gmane.org>
2013-03-04 9:16 ` Peter De Schrijver
[not found] ` <20130304091600.GC27241-Rysk9IDjsxmJz7etNGeUX8VPkgjIgRvpAL8bYrjMMd8@public.gmane.org>
2013-03-04 17:08 ` Stephen Warren
[not found] ` <5134D50B.8060001-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-03-05 7:40 ` Peter De Schrijver
[not found] ` <20130305074047.GH27241-Rysk9IDjsxmJz7etNGeUX8VPkgjIgRvpAL8bYrjMMd8@public.gmane.org>
2013-03-05 17:00 ` Stephen Warren
[not found] ` <513624AA.4090207-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-03-06 8:14 ` Peter De Schrijver
[not found] ` <20130306081401.GN27241-Rysk9IDjsxmJz7etNGeUX8VPkgjIgRvpAL8bYrjMMd8@public.gmane.org>
2013-03-06 16:18 ` Stephen Warren
2013-03-10 17:25 ` Santosh Shilimkar
[not found] ` <513CC21E.7080901-l0cyMroinI0@public.gmane.org>
2013-03-10 18:47 ` Olof Johansson
[not found] ` <CAOesGMgYL19+u-bLp080iasct5xtC=qfNCoz=SY7bbVgF=7JQg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-03-11 16:59 ` Stephen Warren
2013-03-11 18:54 ` Jason Gunthorpe [this message]
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