On Friday 27 November 2015, 08:02:19 wrote Adrian Schröter: > On Friday 27 November 2015, 07:58:47 wrote Adrian Schröter: > > On Thursday 26 November 2015, 22:57:57 wrote Dirk Müller: > > > Hi Adrian, > > > > > > > I have disabled for now kernel RNG support in the build script for arm, > > > > but we need to discuss if we want to have this in future (by having > > > > proper kernel and initrd support for it) or if we should disable it in > > > > general for arm. > > > > > > Not all ARMv7 workers have support hardware available for a random > > > number generator. Most do, so disabling it globally is not a good > > > idea. > > > > > > I'm not sure what the problem was, but now I had no chance to debug - > > > isn't this already solved by the autodetection that Andreas submitted? > > > > The problem is that we can't detect from outside if the kernel which is > > loading > > will complain about the extra parameter or not. And complain means here > > stopping > > the build. > > > > The commits from the mentioned pull request are merged and active, > > but they only affect the qemu-kvm behaviour, not the kernel behaviour. > > > > All what we we can do is checking on the host if the hardware is able > > to provide hardware rng and then just guessing if the guest kernel > > will support it IMHO. > > > > Some something like > > > > dd if=/dev/hwrng of=/dev/null bs=1 count=1 || kvm_rng_device= > > > > this which is disabling rng options when no device is there in the > > host. Do you know a better way to check for hwrng which avoids > > such a potential hanging read? I do not have any arm 32bit with hwrng > > device around, it seems. > > okay, the second commit tries to do this already ... checking why it breaks > ... > (sorry, first mail before coffee)
[ 14s] linux64 /usr/bin/qemu-system-arm -nodefaults -no-reboot -nographic -vga none -enable-kvm -M virt -cpu host -object rng-random,filename=/dev/random,id=rng0 -device virtio-rng-pci,rng=rng0 -mem-prealloc -mem-path /dev/hugepages -net none -kernel /boot/zImage.guest -initrd /boot/initrd -append root=/dev/disk/by-id/virtio-0 rootfstype=ext4 rootflags=noatime panic=1 quiet no-kvmclock nmi_watchdog=0 rw rd.driver.pre=binfmt_misc elevator=noop console=ttyAMA0 init=/.build/build -m 1020 -drive file=/var/cache/obs/worker/root_1/root,format=raw,if=none,id=disk,serial=0,cache=unsafe -device virtio-blk-device,drive=disk -drive file=/var/cache/obs/worker/root_1.swap,format=raw,if=none,id=swap,serial=1,cache=unsafe -device virtio-blk-device,drive=swap -serial stdio -smp 1 [ 14s] qemu-system-arm: -device virtio-rng-pci,rng=rng0: No 'PCI' bus found for device 'virtio-rng-pci' So, virtio rng device seems not to work with non-hardware rng generator. -- Adrian Schroeter email: adr...@suse.de SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) Maxfeldstraße 5 90409 Nürnberg Germany -- To unsubscribe, e-mail: opensuse-arm+unsubscr...@opensuse.org To contact the owner, e-mail: opensuse-arm+ow...@opensuse.org
