On Mon, 22 Feb 2021 13:41:01 +0100 Pierre Morel <pmorel@xxxxxxxxxxxxx> wrote: > When we intercept a DIAG_9C from the guest we verify that the > target real CPU associated with the virtual CPU designated by > the guest is running and if not we forward the DIAG_9C to the > target real CPU. > > To avoid a diag9c storm we allow a maximal rate of diag9c forwarding. > > The rate is calculated as a count per second defined as a new > parameter of the s390 kvm module: diag9c_forwarding_hz . > > The default value of 0 is to not forward diag9c. > > Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx> > --- > Documentation/virt/kvm/s390-diag.rst | 33 ++++++++++++++++++++++++++++ > arch/s390/include/asm/kvm_host.h | 1 + > arch/s390/include/asm/smp.h | 1 + > arch/s390/kernel/smp.c | 1 + > arch/s390/kvm/diag.c | 31 +++++++++++++++++++++++--- > arch/s390/kvm/kvm-s390.c | 6 +++++ > arch/s390/kvm/kvm-s390.h | 8 +++++++ > 7 files changed, 78 insertions(+), 3 deletions(-) Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>
