diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 13 | ||||
| -rw-r--r-- | Documentation/virtual/kvm/devices/arm-vgic-its.txt | 20 | ||||
| -rw-r--r-- | Documentation/virtual/kvm/devices/s390_flic.txt | 5 |
3 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index e63a35fafef0..f670e4b9e7f3 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -1124,10 +1124,14 @@ guest physical address space and must not conflict with any memory slot or any mmio address. The guest may malfunction if it accesses this memory region. +Setting the address to 0 will result in resetting the address to its default +(0xfffbc000). + This ioctl is required on Intel-based hosts. This is needed on Intel hardware because of a quirk in the virtualization implementation (see the internals documentation when it pops into existence). +Fails if any VCPU has already been created. 4.41 KVM_SET_BOOT_CPU_ID @@ -4347,3 +4351,12 @@ This capability indicates that userspace can load HV_X64_MSR_VP_INDEX msr. Its value is used to denote the target vcpu for a SynIC interrupt. For compatibilty, KVM initializes this msr to KVM's internal vcpu index. When this capability is absent, userspace can still query this msr's value. + +8.13 KVM_CAP_S390_AIS_MIGRATION + +Architectures: s390 +Parameters: none + +This capability indicates if the flic device will be able to get/set the +AIS states for migration via the KVM_DEV_FLIC_AISM_ALL attribute and allows +to discover this without having to create a flic device. diff --git a/Documentation/virtual/kvm/devices/arm-vgic-its.txt b/Documentation/virtual/kvm/devices/arm-vgic-its.txt index eb06beb75960..8d5830eab26a 100644 --- a/Documentation/virtual/kvm/devices/arm-vgic-its.txt +++ b/Documentation/virtual/kvm/devices/arm-vgic-its.txt @@ -33,6 +33,10 @@ Groups: request the initialization of the ITS, no additional parameter in kvm_device_attr.addr. + KVM_DEV_ARM_ITS_CTRL_RESET + reset the ITS, no additional parameter in kvm_device_attr.addr. + See "ITS Reset State" section. + KVM_DEV_ARM_ITS_SAVE_TABLES save the ITS table data into guest RAM, at the location provisioned by the guest in corresponding registers/table entries. @@ -157,3 +161,19 @@ Then vcpus can be started. - pINTID is the physical LPI ID; if zero, it means the entry is not valid and other fields are not meaningful. - ICID is the collection ID + + ITS Reset State: + ---------------- + +RESET returns the ITS to the same state that it was when first created and +initialized. When the RESET command returns, the following things are +guaranteed: + +- The ITS is not enabled and quiescent + GITS_CTLR.Enabled = 0 .Quiescent=1 +- There is no internally cached state +- No collection or device table are used + GITS_BASER<n>.Valid = 0 +- GITS_CBASER = 0, GITS_CREADR = 0, GITS_CWRITER = 0 +- The ABI version is unchanged and remains the one set when the ITS + device was first created. diff --git a/Documentation/virtual/kvm/devices/s390_flic.txt b/Documentation/virtual/kvm/devices/s390_flic.txt index 2f1cbf1301d2..a4e20a090174 100644 --- a/Documentation/virtual/kvm/devices/s390_flic.txt +++ b/Documentation/virtual/kvm/devices/s390_flic.txt @@ -151,8 +151,13 @@ struct kvm_s390_ais_all { 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. + KVM_DEV_FLIC_AISM_ALL is indicated by KVM_CAP_S390_AIS_MIGRATION. + 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 that a FLIC operation is unavailable based on the error code resulting from a usage attempt. + +Note: The KVM_DEV_FLIC_CLEAR_IO_IRQ ioctl will return EINVAL in case a zero +schid is specified. |