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

Message ID 20211202095843.41162-1-david@redhat.com (mailing list archive)
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Series s390x: firq: floating interrupt test | expand

Message

David Hildenbrand Dec. 2, 2021, 9:58 a.m. UTC 
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