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| author | Yi Min Zhao <zyimin@linux.vnet.ibm.com> | 2017-06-07 10:09:52 +0200 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2017-06-22 12:41:07 +0200 |
| commit | 2c1a48f2e5ed31b881eaa003a6276818a4794485 (patch) | |
| tree | 2caf7eb9097e838ca72cbe378bf34eb3a62bc6d3 /Documentation/virtual | |
| parent | KVM: s390: implement instruction execution protection for emulated (diff) | |
| download | linux-2c1a48f2e5ed31b881eaa003a6276818a4794485.tar.xz linux-2c1a48f2e5ed31b881eaa003a6276818a4794485.zip | |
KVM: S390: add new group for flic
In some cases, userspace needs to get or set all ais states for example
migration. So we introduce a new group KVM_DEV_FLIC_AISM_ALL to provide
interfaces to get or set the adapter-interruption-suppression mode for
all ISCs. The corresponding documentation is updated.
Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'Documentation/virtual')
| -rw-r--r-- | Documentation/virtual/kvm/devices/s390_flic.txt | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/devices/s390_flic.txt b/Documentation/virtual/kvm/devices/s390_flic.txt index c2518cea8ab4..2f1cbf1301d2 100644 --- a/Documentation/virtual/kvm/devices/s390_flic.txt +++ b/Documentation/virtual/kvm/devices/s390_flic.txt @@ -16,6 +16,7 @@ FLIC provides support to - register and modify adapter interrupt sources (KVM_DEV_FLIC_ADAPTER_*) - modify AIS (adapter-interruption-suppression) mode state (KVM_DEV_FLIC_AISM) - inject adapter interrupts on a specified adapter (KVM_DEV_FLIC_AIRQ_INJECT) +- get/set all AIS mode states (KVM_DEV_FLIC_AISM_ALL) Groups: KVM_DEV_FLIC_ENQUEUE @@ -136,6 +137,20 @@ struct kvm_s390_ais_req { an isc according to the adapter-interruption-suppression mode on condition that the AIS capability is enabled. + KVM_DEV_FLIC_AISM_ALL + Gets or sets the adapter-interruption-suppression mode for all ISCs. Takes + a kvm_s390_ais_all describing: + +struct kvm_s390_ais_all { + __u8 simm; /* Single-Interruption-Mode mask */ + __u8 nimm; /* No-Interruption-Mode mask * +}; + + simm contains Single-Interruption-Mode mask for all ISCs, nimm contains + No-Interruption-Mode mask for all ISCs. Each bit in simm and nimm corresponds + to an ISC (MSB0 bit 0 to ISC 0 and so on). The combination of simm bit and + nimm bit presents AIS mode for a ISC. + 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 |