diff options
Diffstat (limited to 'Documentation/virtual')
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 4 | ||||
| -rw-r--r-- | Documentation/virtual/kvm/devices/arm-vgic-its.txt | 20 |
2 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 49540e53c4bd..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 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. |