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Re: [Qemu-devel] dynamic sysbus instantiation and load_dtb implementatio
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From: |
Alexander Graf |
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Subject: |
Re: [Qemu-devel] dynamic sysbus instantiation and load_dtb implementation |
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Date: |
Thu, 23 Oct 2014 13:26:08 +0200 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 |
On 23.10.14 13:24, Peter Maydell wrote:
> On 23 October 2014 12:23, Alexander Graf <address@hidden> wrote:
>> On 23.10.14 12:19, Ard Biesheuvel wrote:
>>> 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.
>
> Any particular reason? Surely it's always the same...
We have the code in place anyway, it's not a performance critical code
path and putting it into a rom would be a waste of RAM, as it'd keep yet
another copy of something we can easily regenerate.
It's a matter of personal preference I guess.
Alex