On 19/08/14 11:27, Paolo Bonzini wrote: > Il 19/08/2014 10:38, Christian Borntraeger ha scritto: >>>> The patch may be okay, but I'm worried that it might be hiding a bug in >>>> QEMU. >> On s390 we call "KVM_S390_INITIAL_RESET" from several reset functions, e.g. >> during >> CPU creation. This is the first hickup and the pid now points to the main >> thread. > > Any reason to have a special ioctl instead of SET_REGS/SET_ONE_REG/... > (via kvm_cpu_synchronize_state, which does the ioctls in the VCPU thread)?
Historical reasons mostly. Older kernel miss several interfaces to bring the CPU in a defined state (pending interrupts, cpu state, some registers...) Good news is that we are working on getting rid of it: cpu states are now available as far as I can see, only local interrupt flushing is missing.This needs some more work on our side. So in some month we probably will have a QEMU version that does not need to call this any more. For todays QEMU this patch help though. Christian -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
