On 31.10.18 09:56, Janosch Frank wrote:
On 25.10.18 14:37, Michael Mueller wrote:The GIB (Guest Information Block) links the GISA of all guests that have adapter interrupts pending. These interrupts cannot be deliverd because no vcpu of these guests is currently running in SIE context. Instead, a GIB alert is issued on the host to schedule these guests to run. This mechanism allows to process adapter interrupts for currently not running guests. The GIB is created during host initialization and associated with the Adapter Interruption Facility in case an Adapter Interruption Virtualization Facility is available. Signed-off-by: Michael Mueller<mimu@xxxxxxxxxxxxx> --- /* * sie_page2 has to be allocated as DMA because fac_list, crycb and * gisa need 31bit addresses in the sie control block. @@ -829,6 +838,7 @@ struct kvm_arch{ /* subset of available cpu features enabled by user space */ DECLARE_BITMAP(cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS); struct kvm_s390_gisa *gisa; + int gib_in_use; };That's a kvm wide value, right? But here we save it per VM. Is that really necessary or am I missing something?
It is guest related as a guest might decide in future to not use a GISA.
