On 10/19/20 2:36 PM, Nick Desaulniers wrote: > On Mon, Oct 19, 2020 at 3:55 AM Christian Borntraeger > <borntraeger@xxxxxxxxxx> wrote: >> >> >> >> On 17.10.20 01:40, Nick Desaulniers wrote: >>> On Fri, Oct 16, 2020 at 4:18 PM Guenter Roeck <linux@xxxxxxxxxxxx> wrote: >>>> >>>> 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 >> >> Do you have more information? If not, any chance to run objdump on the kernel >> and check what instructions do you have aroung address 0x1779e >> [...] > > Is PSW the program counter? > /me skims https://www.kernel.org/doc/Documentation/s390/Debugging390.txt *woah* > Is there something more specific I should be running than: > $ s390x-linux-gnu-objdump -Dr vmlinux | grep 179fe > because I get lots of hits for that, but not 0x179fe. > > In fact, the first symbol starts at 0x100000. Unless this is a failure > in the image decompressor? > >> >>> Hopefully qemu supports something newer than Z900? Or can we change >>> arch/s390/Kconfig:255 to use a different arch? Is arch9 == z900???: >> >> Newer QEMUs do support up to z13, so I think this is not an issue as long >> as you have an uptodate qemu. > > $ qemu-system-s390x --version > QEMU emulator version 5.1.0 (Debian 1:5.1+dfsg-4) > I found that you have to run "qemu-system-s390x -cpu qemu ...". I was able to boot s390 defconfig without changes after doing that. Guenter
