This patch series implements floating interrupt support for TCG and fixes STSI so we can remove warnings related to s390x SMP and MTTCG.
KVM code has to be touched in order to factor out the injection routines into the flic ("s390x/flic: factor out injection of floating interrupts"). Basic testing didn't reveal any problems so far. With this series I am now able to run fedora 26/27 and Ubuntu 17.10+ with 16 VCPUs (MTTCG) on a 8CPU host, doing a make -j16 in the guest. I got nasty stalls in the guest beforehand. I already sent the patches - "cpus: make pause_all_cpus() play with SMP on single threaded TCG" - "cpu-exec: fix missed CPU kick during interrupt injection" separately, but as nobody commented so far (e.g. due to 2.11) I am including them here as they are required to make SMP work reliably. Based on: https://github.com/cohuck/qemu.git s390x-next Available at: https://github.com/davidhildenbrand/qemu.git s390x-queue David Hildenbrand (15): cpus: make pause_all_cpus() play with SMP on single threaded TCG cpu-exec: fix missed CPU kick during interrupt injection s390x/tcg: deliver multiple interrupts in a row s390x/flic: simplify flic initialization s390x/tcg: simplify machine check handling s390x/flic: factor out injection of floating interrupts s390x/tcg: tolerate wrong wakeups due to floating interrupts s390x/flic: make floating interrupts on TCG actually floating s390x/tcg: implement TEST PENDING INTERRUPTION s390x/flic: implement qemu_s390_clear_io_flic() s390x/flic: optimize CPU wakeup for TCG s390x/tcg: fix size + content of STSI blocks s390x/tcg: STSI overhaul s390x/tcg: remove SMP warning configure: s390x supports mttcg now accel/tcg/cpu-exec.c | 12 +- configure | 1 + cpus.c | 32 +++--- hw/intc/s390_flic.c | 222 +++++++++++++++++++++++++++++++++++- hw/intc/s390_flic_kvm.c | 75 +++++++++--- hw/s390x/s390-virtio-ccw.c | 4 - include/hw/s390x/s390_flic.h | 55 +++++++-- target/s390x/cpu.c | 10 -- target/s390x/cpu.h | 75 ++++++------ target/s390x/excp_helper.c | 147 +++++++++--------------- target/s390x/helper.h | 1 + target/s390x/insn-data.def | 1 + target/s390x/internal.h | 5 - target/s390x/interrupt.c | 100 ++++------------ target/s390x/kvm-stub.c | 13 --- target/s390x/kvm.c | 68 +---------- target/s390x/kvm_s390x.h | 10 +- target/s390x/misc_helper.c | 266 +++++++++++++++++++++++++++---------------- target/s390x/translate.c | 8 ++ 19 files changed, 644 insertions(+), 461 deletions(-) -- 2.14.3