On 11/19/2014 03:47 PM, Paul Whalen wrote:
----- 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_Versatile_Express_Emulation_with_QEMU
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.
I did this with virt-install:
sudo virt-install --name f21-arm-machvirt --ram 1024 --arch armv7l --disk
Fedora-Minimal-armhfp-21-20141117-sda.raw --import --boot
kernel=vmlinuz-3.17.2-300.fc21.armv7hl,initrd=initramfs-3.17.2-300.fc21.armv7hl.img,kernel_args="console=ttyAMA0
rw root=/dev/vda3 rootwait"
But looking at the libvirt generated qemu command line is probably more
confusing than enlightening. What command line did you use? Maybe I can spot
the problem
- Cole
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