----- Original Message ----- > > > ----- Original Message ----- > > 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 > > From our wiki (only added -M virt): > > sudo qemu-system-arm -M virt -cpu cortex-a15 -m 1024 -nographic -net nic -net > user \ > -append "console=ttyAMA0,115200n8 rw root=/dev/mmcblk0p3 rootwait > physmap.enabled=0" \ > -kernel $KERN \ > -initrd $INTRD \ > -sd Fedora-$TYPE-armhfp-21_Beta-4-sda.raw > > Gives serial output, but the machine type is listed as: Machine model: > linux,dummy-virt , > system doesnt find the rootfs. Driver error, the rootfs was on '/dev/vda3' rather than mmcblk0. I've updated the wiki to use the label ( root=LABEL=_/ ) , and its indeed working without specifying the dtb. Thanks! Paul > > > > > - Cole > > > _______________________________________________ > arm mailing list > arm@xxxxxxxxxxxxxxxxxxxxxxx > https://admin.fedoraproject.org/mailman/listinfo/arm _______________________________________________ arm mailing list arm@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/arm
