From: Julien Grall <julien.grall@arm.com>
To: Wei Liu <wei.liu2@citrix.com>, Steve Capper <steve.capper@arm.com>
Cc: lars.kurth.xen@gmail.com, xen-devel@lists.xenproject.org,
Wei.Chen@arm.com, andre.przywara@arm.com
Subject: Re: [HACKATHON 2016] Mini-OS on ARM
Date: Thu, 5 May 2016 17:03:08 +0100 [thread overview]
Message-ID: <572B6EBC.3030500@arm.com> (raw)
In-Reply-To: <20160505155726.GE27070@citrix.com>
Hi Wei,
On 05/05/16 16:57, Wei Liu wrote:
> On Thu, May 05, 2016 at 04:47:31PM +0100, Steve Capper wrote:
>> [Apologies for the late send]
>>
>> Mini-OS on ARM
>> ==============
>>
>> This session covered mini-os bringup on 64-bit ARM platforms.
>> The following points arose during discussion:
>>
>> *) 32-bit Mini-OS may have bit-rotted
>> o) Some memory addresses may have been hard-coded for instance.
>> o) The memory map in Xen can change between releases.
>>
>
> I think this might have been fixed by Juergen.
This session was about Mini-OS on ARM and this patch is x86 specific.
The problem is Mini-OS on ARM is using hardcoded addresses and interrupt
number for some devices. This needs to be fix if you want mini-os to
work on any Xen ARM release.
> Author: Juergen Gross <jgross@suse.com>
> AuthorDate: Fri Nov 20 19:32:42 2015 +0100
> Commit: Ian Campbell <ian.campbell@citrix.com>
> CommitDate: Mon Nov 23 09:38:58 2015 +0000
>
> minios: don't rely on specific page table allocation scheme
>
> Today mini-os is making assumptions how the page tables it is started
> with are being allocated. Especially it is using the number of page
> table frames to calculate which is the first unmapped pfn.
>
> Instead of relying on page table number assumptions just look into the
> page tables to find the first pfn not already mapped.
>
> Signed-off-by: Juergen Gross <jgross@suse.com>
> Acked-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cheers,
--
Julien Grall
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next prev parent reply other threads:[~2016-05-05 16:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-05 15:47 [HACKATHON 2016] Mini-OS on ARM Steve Capper
2016-05-05 15:57 ` Wei Liu
2016-05-05 16:03 ` Julien Grall [this message]
2016-05-05 16:05 ` Wei Liu
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