[kvm-unit-tests PATCH v1 0/2] s390x: firq: floating interrupt test

David Hildenbrand
2021-12-02T09:59:50Z

From patch #2:

"
We had a KVM BUG fixed by kernel commit a3e03bc1368c ("KVM: s390: index
kvm->arch.idle_mask by vcpu_idx"), whereby a floating interrupt might get
stuck forever because a CPU in the wait state would not get woken up.

The issue can be triggered when CPUs are created in a nonlinear fashion,
such that the CPU address ("core-id") and the KVM cpu id don't match.

So let's start with a floating interrupt test that will trigger a
floating interrupt (via SCLP) to be delivered to a CPU in the wait state.
"

David Hildenbrand (2):
s390x: make smp_cpu_setup() return 0 on success
s390x: firq: floating interrupt test

lib/s390x/smp.c | 1 +
s390x/Makefile | 1 +
s390x/firq.c | 141 ++++++++++++++++++++++++++++++++++++++++++++
s390x/unittests.cfg | 10 ++++
4 files changed, 153 insertions(+)
create mode 100644 s390x/firq.c

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2.31.1