I'm cleaning up some of the SIGP code in KVM and QEMU, and would like to propose the following changes. Patch 1 is interesting and could use some discussion, in that CZAM cannot be disabled with QEMU (it is present in the earliest CPU models) but the CPU model interface _could_ allow userspace to leave it out. On the other (other?) hand, since we are always in z/Architecture, that wouldn't make much sense as there would probably be some other interesting side effects. Patch 6 isn't required, but as I was looking at the intersection of KVM capabilities S390_USER_SIGP and MP_STATE for this, I thought some footprints could be useful. There is no dependency on QEMU code, however another series of patches for QEMU will follow. Eric Farman (6): KVM: s390: Simplify SIGP Set Arch handling KVM: s390: Reject SIGP when destination CPU is busy KVM: s390: Simplify SIGP Restart KVM: s390: Restart IRQ should also block SIGP KVM: s390: Give BUSY to SIGP SENSE during Restart KVM: s390: Add a routine for setting userspace CPU state arch/s390/include/asm/kvm_host.h | 1 + arch/s390/kvm/interrupt.c | 7 +++ arch/s390/kvm/kvm-s390.c | 7 +-- arch/s390/kvm/kvm-s390.h | 10 ++++ arch/s390/kvm/sigp.c | 86 +++++++++++++++++++++++--------- 5 files changed, 85 insertions(+), 26 deletions(-) -- 2.25.1
