>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.
"
v1 -> v2:
- Remove flag logic
- Extend comments
- Minor cleanups
- sclp_clear_busy() before printing to the SCLP console
David Hildenbrand (2):
s390x: make smp_cpu_setup() return 0 on success
s390x: firq: floating interrupt test
lib/s390x/sclp.c | 11 ++--
lib/s390x/sclp.h | 1 +
lib/s390x/smp.c | 1 +
s390x/Makefile | 1 +
s390x/firq.c | 122 ++++++++++++++++++++++++++++++++++++++++++++
s390x/unittests.cfg | 10 ++++
6 files changed, 143 insertions(+), 3 deletions(-)
create mode 100644 s390x/firq.c
--
2.31.1
