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Date: Thu, 23 Oct 2014 13:23:01 +0200
From: Alexander Graf <agraf@suse.de>
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Subject: Re: [Qemu-devel] dynamic sysbus instantiation and load_dtb
	implementation
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To: Ard Biesheuvel <ard.biesheuvel@linaro.org>, Eric Auger <eric.auger@linaro.org>
Cc: Peter Maydell <peter.maydell@linaro.org>, qemu list <qemu-devel@nongnu.org>, Alex Williamson <alex.williamson@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Antonios Motakis <a.motakis@virtualopensystems.com>, Christoffer Dall <christoffer.dall@linaro.org>



On 23.10.14 12:19, Ard Biesheuvel wrote:
>> Dear all,
>>
>> The goal of this mail is to summarize how dynamic sysbus device tree
>> nodes were created on ARM with "machvirt dynamic sysbus device
>> instantiation",
>> https://lists.gnu.org/archive/html/qemu-devel/2014-09/msg01626.html
>> and request some advises after commit "hw/arm/boot: load DTB as a ROM
>> image", which puts into question the current implementation.
>>
> 
> The reason for this change was that, before, the DTB would only be
> generated once, and after a reset, the machine would go through the
> kernel boot protocol as before but the DTB pointer would point to
> garbage. Any idea how ppc deals with this? Do they recreate the device
> tree after each reset?

Yes, we regenerate the device tree on each reset.


Alex