sclp-1g from ubuntu_kvm_unit_tests failed on B-4.15 s390x

[Po-Hsu Lin]

Issue found on Bionic s390x s2lp3 / kernel02 with 4.15.0-145.149-generic

This is not a regression since the test was run with the latest hirsute-WIP branch, with upstream tip c986dbe867053 ("x86/vmx: skip error-code delivery tests for #CP").

Test failed with:
 Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/sclp-1g'
 BUILD_HEAD=90a7d30e
 timeout -k 1s --foreground 90s /usr/bin/qemu-system-s390x -nodefaults -nographic -machine s390-ccw-virtio,accel=kvm -chardev stdio,id=con0 -device sclpconsole,chardev=con0 -kernel /tmp/tmp.N1ZBWe1eMl -smp 1 -m 1G # -initrd /tmp/tmp.PRyfkSoQxC
 qemu-system-s390x: warning: 'apqci' requires 'ap'.
 qemu-system-s390x: warning: 'apft' requires 'ap'.
 PASS: sclp: Instruction format ignored bits
 PASS: sclp: Privileged operation: Program interrupt: expected(2) == received(2)
 PASS: sclp: Invalid SCCB address
 PASS: sclp: SCCB too short
 PASS: sclp: SCCB unaligned
 PASS: sclp: SCCB low pages
 PASS: sclp: SCCB prefix pages
 PASS: sclp: SCCB high addresses
 PASS: sclp: Invalid command: Command detail code
 PASS: sclp: Invalid command: Command class code
 INFO: sclp: First failure at addr 0x28000, buf_len 8, cmd 0x120001, resp code 0x10
 FAIL: sclp: Insufficient SCCB length (Read SCP info)
 INFO: sclp: First failure at addr 0x28000, buf_len 8, cmd 0x10001, resp code 0x10
 FAIL: sclp: Insufficient SCCB length (Read CPU info)
 INFO: sclp: First failure at addr 0x28fe8, buf_len 32, cmd 0x760005, resp code 0x73f0
 FAIL: sclp: SCCB page boundary violation

 Unexpected program interrupt: 6 on cpu 0 at 0x11048, ilen 4

 GPRS:
 0000000000000001 0000000000001001 0100100180000000 0000000000014346
 000000000004fdf8 0000000000000000 0000000000000100 0000000000028fe8
 0000000000000020 0000000000001000 0000000000760005 0000000000028000
 0000000000000001 0000000000020118 0000000000011044 000000000004fe08

 STACK: 15050 114e2 11044 110d4 17f20 10100
 SUMMARY: 13 tests, 3 unexpected failures

 EXIT: STATUS=127
 FAIL sclp-1g (13 tests, 3 unexpected failures)

This issue does not exist in newer kernels on s390x.

[Po-Hsu Lin (cypressyew)]

With kvm-unit-test repo updated to d8a4f9e5 (ci: Update the list of tests that we run in the Fedora Cirrus-CI), this test is still failing with the same error message.