smp from ubuntu_kvm_unit_tests failed on B-4.15 s390x

[Po-Hsu Lin]

Issue found on Bionic s390x s2lp3 / kernel02

Test aborted with:
 ABORT: smp: cpu reset: Unexpected external call interrupt (code 0x1201): on cpu 1 at 0x11944

Test log:
Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/smp'
 BUILD_HEAD=35a22051
 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.0owG9yF64u -smp 2 # -initrd /tmp/tmp.ZPg3yOt5yC
 qemu-system-s390x: warning: 'apqci' requires 'ap'.
 qemu-system-s390x: warning: 'apft' requires 'ap'.
 qemu-system-s390x: warning: 'apqci' requires 'ap'.
 qemu-system-s390x: warning: 'apft' requires 'ap'.
 SMP: Initializing, found 2 cpus
 PASS: smp: start
 PASS: smp: invalid parameters: stop with invalid CPU address
 PASS: smp: invalid parameters: start with invalid CPU address
 PASS: smp: invalid parameters: reset with invalid CPU address
 PASS: smp: invalid parameters: conditional emcall with invalid CPU address
 PASS: smp: invalid parameters: emcall with invalid CPU address
 PASS: smp: invalid parameters: ecall with invalid CPU address
 PASS: smp: invalid parameters: invalid order code and CPU address
 PASS: smp: invalid parameters: sense with invalid CPU address
 PASS: smp: invalid parameters: stop and store status with invalid CPU address
 PASS: smp: invalid parameters: invalid order code
 PASS: smp: restart: stopped: return code
 PASS: smp: restart: stopped: cpu started
 PASS: smp: restart: stopped: test flag
 PASS: smp: restart: running: return code
 PASS: smp: restart: running: cpu started
 PASS: smp: restart: running: test flag
 PASS: smp: stop: return code
 PASS: smp: stop: cpu stopped
 PASS: smp: stop: stop stopped CPU: return code
 PASS: smp: stop: stop stopped CPU: cpu stopped
 PASS: smp: stop store status: running: cpu stopped
 PASS: smp: stop store status: running: prefix
 PASS: smp: stop store status: running: stack
 PASS: smp: stop store status: stopped: cpu stopped
 PASS: smp: stop store status: stopped: prefix
 PASS: smp: stop store status: stopped: stack
 PASS: smp: store status at address: invalid CPU address: returned with CC = 3
 PASS: smp: store status at address: running: incorrect state
 PASS: smp: store status at address: running: status not written
 PASS: smp: store status at address: stopped: status written
 PASS: smp: set prefix: running: CC = 1
 PASS: smp: set prefix: running: status = INCORRECT_STATE
 PASS: smp: set prefix: running: prefix unchanged
 PASS: smp: set prefix: invalid CPU address: CC = 3
 PASS: smp: emcall: received
 PASS: smp: cond emcall: received
 PASS: smp: ecall: received
 PASS: smp: psw wait: emcall: received
 PASS: smp: psw wait: cond emcall: received
 PASS: smp: psw wait: ecall: received
 PASS: smp: sense_running: CPU0 sense claims running
 PASS: smp: sense_running: CPU1 sense claims not running
 PASS: smp: cpu reset: cpu stopped
 ABORT: smp: cpu reset: Unexpected external call interrupt (code 0x1201): on cpu 1 at 0x11944
 SUMMARY: 44 tests

 EXIT: STATUS=127
 FAIL smp (44 tests)

This issue does not exist in newer kernels on s390x.

[Po-Hsu Lin (cypressyew)]

Spotted on X-4.4.0-215.247 s390x zVM

Running '/home/ubuntu/autotest/client/tmp/ubuntu_kvm_unit_tests/src/kvm-unit-tests/tests/smp'
 BUILD_HEAD=1593e88a
 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.qXcnPtfnrz -smp 2 # -initrd /tmp/tmp.mQihhaxWyg
 SMP: Initializing, found 2 cpus
 PASS: smp: start
 PASS: smp: restart while running
 PASS: smp: stop
 FAIL: smp: stop store status: running: prefix
 PASS: smp: stop store status: running: stack
 PASS: smp: stop store status: running: cpu stopped
 FAIL: smp: stop store status: stopped: prefix
 PASS: smp: stop store status: stopped: stack
 PASS: smp: store status at address: running: incorrect state
 PASS: smp: store status at address: running: status not written
 qemu-system-s390x: terminating on signal 15 from pid 10996
 FAIL smp (timeout; duration=90s)

[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 but the error message is different (test cases increases from 16 to 44), I will update the bug description.