diff options
Diffstat (limited to 'Documentation/virtual/kvm/devices/arm-vgic.txt')
| -rw-r--r-- | Documentation/virtual/kvm/devices/arm-vgic.txt | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/Documentation/virtual/kvm/devices/arm-vgic.txt b/Documentation/virtual/kvm/devices/arm-vgic.txt index df8b0c7540b6..3fb905429e8a 100644 --- a/Documentation/virtual/kvm/devices/arm-vgic.txt +++ b/Documentation/virtual/kvm/devices/arm-vgic.txt @@ -3,22 +3,42 @@ ARM Virtual Generic Interrupt Controller (VGIC) Device types supported: KVM_DEV_TYPE_ARM_VGIC_V2 ARM Generic Interrupt Controller v2.0 + KVM_DEV_TYPE_ARM_VGIC_V3 ARM Generic Interrupt Controller v3.0 Only one VGIC instance may be instantiated through either this API or the legacy KVM_CREATE_IRQCHIP api. The created VGIC will act as the VM interrupt controller, requiring emulated user-space devices to inject interrupts to the VGIC instead of directly to CPUs. +Creating a guest GICv3 device requires a host GICv3 as well. +GICv3 implementations with hardware compatibility support allow a guest GICv2 +as well. + Groups: KVM_DEV_ARM_VGIC_GRP_ADDR Attributes: KVM_VGIC_V2_ADDR_TYPE_DIST (rw, 64-bit) Base address in the guest physical address space of the GIC distributor - register mappings. + register mappings. Only valid for KVM_DEV_TYPE_ARM_VGIC_V2. + This address needs to be 4K aligned and the region covers 4 KByte. KVM_VGIC_V2_ADDR_TYPE_CPU (rw, 64-bit) Base address in the guest physical address space of the GIC virtual cpu - interface register mappings. + interface register mappings. Only valid for KVM_DEV_TYPE_ARM_VGIC_V2. + This address needs to be 4K aligned and the region covers 4 KByte. + + KVM_VGIC_V3_ADDR_TYPE_DIST (rw, 64-bit) + Base address in the guest physical address space of the GICv3 distributor + register mappings. Only valid for KVM_DEV_TYPE_ARM_VGIC_V3. + This address needs to be 64K aligned and the region covers 64 KByte. + + KVM_VGIC_V3_ADDR_TYPE_REDIST (rw, 64-bit) + Base address in the guest physical address space of the GICv3 + redistributor register mappings. There are two 64K pages for each + VCPU and all of the redistributor pages are contiguous. + Only valid for KVM_DEV_TYPE_ARM_VGIC_V3. + This address needs to be 64K aligned. + KVM_DEV_ARM_VGIC_GRP_DIST_REGS Attributes: @@ -36,6 +56,7 @@ Groups: the register. Limitations: - Priorities are not implemented, and registers are RAZ/WI + - Currently only implemented for KVM_DEV_TYPE_ARM_VGIC_V2. Errors: -ENODEV: Getting or setting this register is not yet supported -EBUSY: One or more VCPUs are running @@ -68,6 +89,7 @@ Groups: Limitations: - Priorities are not implemented, and registers are RAZ/WI + - Currently only implemented for KVM_DEV_TYPE_ARM_VGIC_V2. Errors: -ENODEV: Getting or setting this register is not yet supported -EBUSY: One or more VCPUs are running @@ -81,3 +103,14 @@ Groups: -EINVAL: Value set is out of the expected range -EBUSY: Value has already be set, or GIC has already been initialized with default values. + + KVM_DEV_ARM_VGIC_GRP_CTRL + Attributes: + KVM_DEV_ARM_VGIC_CTRL_INIT + request the initialization of the VGIC, no additional parameter in + kvm_device_attr.addr. + Errors: + -ENXIO: VGIC not properly configured as required prior to calling + this attribute + -ENODEV: no online VCPU + -ENOMEM: memory shortage when allocating vgic internal data |