diff options
Diffstat (limited to 'Documentation/virtual/kvm')
| -rw-r--r-- | Documentation/virtual/kvm/devices/s390_flic.txt | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/devices/s390_flic.txt b/Documentation/virtual/kvm/devices/s390_flic.txt index e8ee3b6edb05..dfd42fd4abd5 100644 --- a/Documentation/virtual/kvm/devices/s390_flic.txt +++ b/Documentation/virtual/kvm/devices/s390_flic.txt @@ -14,6 +14,7 @@ FLIC provides support to - purge one pending floating I/O interrupt (KVM_DEV_FLIC_CLEAR_IO_IRQ) - enable/disable for the guest transparent async page faults - register and modify adapter interrupt sources (KVM_DEV_FLIC_ADAPTER_*) +- modify AIS (adapter-interruption-suppression) mode state (KVM_DEV_FLIC_AISM) Groups: KVM_DEV_FLIC_ENQUEUE @@ -107,6 +108,25 @@ struct kvm_s390_io_adapter_req { release a userspace page for the translated address specified in addr from the list of mappings + KVM_DEV_FLIC_AISM + modify the adapter-interruption-suppression mode for a given isc if the + AIS capability is enabled. Takes a kvm_s390_ais_req describing: + +struct kvm_s390_ais_req { + __u8 isc; + __u16 mode; +}; + + isc contains the target I/O interruption subclass, mode the target + adapter-interruption-suppression mode. The following modes are + currently supported: + - KVM_S390_AIS_MODE_ALL: ALL-Interruptions Mode, i.e. airq injection + is always allowed; + - KVM_S390_AIS_MODE_SINGLE: SINGLE-Interruption Mode, i.e. airq + injection is only allowed once and the following adapter interrupts + will be suppressed until the mode is set again to ALL-Interruptions + or SINGLE-Interruption mode. + Note: The KVM_SET_DEVICE_ATTR/KVM_GET_DEVICE_ATTR device ioctls executed on FLIC with an unknown group or attribute gives the error code EINVAL (instead of ENXIO, as specified in the API documentation). It is not possible to conclude |