On 17.01.2018 20:37, Christian Borntraeger wrote: > We need to handle the bpb control on reset and migration. Normally > stfle.82 is transparent (and the normal guest part works without > hypervisor activity). To prevent any issues we require full > host kernel support for this feature. > > Signed-off-by: Christian Borntraeger <borntrae...@de.ibm.com> > --- > target/s390x/cpu.c | 1 + > target/s390x/cpu.h | 1 + > target/s390x/cpu_features.c | 1 + > target/s390x/cpu_features_def.h | 1 + > target/s390x/gen-features.c | 1 + > target/s390x/kvm.c | 14 ++++++++++++++ > target/s390x/machine.c | 17 +++++++++++++++++ > 7 files changed, 36 insertions(+) > > diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c > index ae3cee9..1577b2c 100644 > --- a/target/s390x/cpu.c > +++ b/target/s390x/cpu.c > @@ -89,6 +89,7 @@ static void s390_cpu_reset(CPUState *s) > CPUS390XState *env = &cpu->env; > > env->pfault_token = -1UL; > + env->bpbc = 0;
As this is effectively only 1 bit, I wonder if we should also make that clear in QEMU bool bpbc, VMSTATE_BOOL ... Apart from that, looks sane. -- Thanks, David / dhildenb
