----- Original Message -----
On 11/19/2014 10:23 AM, Peter Robinson wrote:
>>>>> Just trying the F21 beta (and
>>>>> Fedora-Minimal-armhfp-21-20141117-sda.raw)
>>>>> under
>>>>> qemu. Seems like these versions both require explicitly passing in
a
>>>>> dtb
>>>>> to
>>>>> qemu to actually boot. Well, maybe it's booting and I'm just
not
>>>>> getting
>>>>> any
>>>>> serial output, can't really tell.
>>>>>
>>>>> Passing a dtb to qemu wasn't required for the F20 GA release at
least,
>>>>> and
>>>>> still isn't required with F21 qemu-system-arm, so presumably
it's not a
>>>>> qemu
>>>>> regression.
>>>
>>>
>>> Fedora 21 requires the use of a dtb to boot the multiplatform kernel.
>>> This
>>> changed
>>> around the 3.16 RC's (iirc).
>>>
>>>>>
>>>>> Having to pass a dtb is kind of a pain for management tools,
it's
>>>>> another
>>>>> file
>>>>> that needs to handled. And the docs say it shouldn't be
required:
>>>>>
>>>>>
https://fedoraproject.org/wiki/Architectures/ARM/F21/Installation#For_Ver...
>>>
>>>
>>> Thanks, I will adjust the page.
>>>
>>
>> Medium/long term we should consider changing the docs to recommend using
>> qemu-system-arm -M virt, since that's where all the virt improvements are
>> generally going to take place, and it doesn't require an explicit dtb
>> (since
>> it generates ones behind the scene). That will also be the virt machine
>> type
>> used for aarch64, so it will be nice to have parity there.
What command should be used? When I add in -M virt and do not include a dtb, I
dont get any output on the serial console (a9, a15) using
qemu-system-arm-2.1.2-6.fc21.x86_64.
Many thanks,
Paul
>
> That certainly sounds the best route. Does that allow the use of
> virtio* for storage/network/display etc?
>
It gives virtio for storage/network automatically, in fact it only supports
virtio.
virtio display doesn't exist upstream yet. There's work on one but it's a
ways
off AIUI
Though my understanding is that soon people will be looking at adding some
manner of PCI support to -M virt, which may open the doors for getting
graphics to work. But I'm pretty ignorant WRT the technical details so I'm
not
really sure.
-M virt also has the best integration for KVM for running on arm hardware, so
provides some parity there as well.
- Cole