Hi Cornelia, On Wed, Oct 31, 2012 at 05:24:47PM +0100, Cornelia Huck wrote: > Provide a mechanism for qemu to provide fully virtual subchannels to > the guest. In the KVM case, this relies on the kernel's css support > for I/O and machine check interrupt handling. The !KVM case handles > interrupts on its own. > > Signed-off-by: Cornelia Huck <cornelia.h...@de.ibm.com> > --- > hw/s390x/Makefile.objs | 1 + > hw/s390x/css.c | 1209 > ++++++++++++++++++++++++++++++++++++++++++++ > hw/s390x/css.h | 90 ++++ > target-s390x/Makefile.objs | 2 +- > target-s390x/cpu.h | 232 +++++++++ > target-s390x/helper.c | 146 ++++++ > target-s390x/ioinst.c | 737 +++++++++++++++++++++++++++ > target-s390x/ioinst.h | 213 ++++++++ > target-s390x/kvm.c | 251 ++++++++- > target-s390x/misc_helper.c | 6 +- > 10 files changed, 2872 insertions(+), 15 deletions(-) > create mode 100644 hw/s390x/css.c > create mode 100644 hw/s390x/css.h > create mode 100644 target-s390x/ioinst.c > create mode 100644 target-s390x/ioinst.h
> +void kvm_s390_enable_css_support(CPUS390XState *env) > +{ > + struct kvm_enable_cap cap = {}; > + int r; > + > + /* Activate host kernel channel subsystem support. */ > + if (kvm_enabled()) { > + /* One CPU has to run */ > + s390_add_running_cpu(env); Care to explain this? > + > + cap.cap = KVM_CAP_S390_CSS_SUPPORT; > + r = kvm_vcpu_ioctl(env, KVM_ENABLE_CAP, &cap); > + assert(r == 0); > + } > +} -- 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