On 10/16/20 4:11 PM, Nick Desaulniers wrote: > Hello all, > I'm working on integrating the latest release of buildroot (2020.08.1) > into our CI for ClangBuiltLinux. > > https://github.com/ClangBuiltLinux/boot-utils/pull/25 > https://github.com/ClangBuiltLinux/boot-utils/pull/26 > https://github.com/ClangBuiltLinux/continuous-integration/pull/327 > > I'm seeing the following error from QEMU: > KASLR disabled: CPU has no PRNG > Linux version 5.9.0-00732-g04ed4527465f (ndesaulniers@<myhost>) #30 > SMP Fri Oct 16 15:49:05 PDT 2020Kernel fault: interruption code 0005 > ilc:2 > PSW : 0000200180000000 000000000001779e > R:0 T:0 IO:0 EX:0 Key:0 M:0 W:0 P:0 AS:0 CC:2 PM:0 RI:0 EA:3 > GPRS: 0000000000000001 0000000c00000000 00000003fffffff4 00000000fffffff0 > 0000000000000000 00000000fffffff4 000000000000000c 00000000fffffff0 > 00000000fffffffc 0000000000000000 00000000fffffff8 00000000008a75a8 > 0000000000000009 0000000000000002 0000000000000008 000000000000bce0 > > This is via a kernel built by: > $ ARCH=s390 CROSS_COMPILE=s390x-linux-gnu- make CC=clang -j71 defconfig > $ ARCH=s390 CROSS_COMPILE=s390x-linux-gnu- make CC=clang -j71 > > The booting qemu: > $ qemu-system-s390x -M s390-ccw-virtio -append 'rdinit=/bin/sh ' > -display none -initrd /android1/boot-utils/images/s390/rootfs.cpio > -kernel /android0/kernel-all/arch/s390/boot/bzImage -m 512m > -nodefaults -serial mon:stdio > > Is there a preferred kernel config or additional flags to QEMU I > should be using to avoid this error? It's also possible that there's > a bug in the kernel image, but given that it fails very early with no > other output, I am slightly suspicious of that. > Maybe that helps ? From my builders: # qemu only supports MARCH_Z900. Older kernels select it as default, # but newer kernels may select MARCH_Z196. sed -i -e '/CONFIG_MARCH_Z/d' ${defconfig} sed -i -e '/HAVE_MARCH_Z/d' ${defconfig} echo "CONFIG_MARCH_Z900=y" >> ${defconfig} echo "CONFIG_PCI=y" >> ${defconfig} Guenter
