| ARM Virtual Interrupt Translation Service (ITS) |
| =============================================== |
| |
| Device types supported: |
| KVM_DEV_TYPE_ARM_VGIC_ITS ARM Interrupt Translation Service Controller |
| |
| The ITS allows MSI(-X) interrupts to be injected into guests. This extension is |
| optional. Creating a virtual ITS controller also requires a host GICv3 (see |
| arm-vgic-v3.txt), but does not depend on having physical ITS controllers. |
| |
| There can be multiple ITS controllers per guest, each of them has to have |
| a separate, non-overlapping MMIO region. |
| |
| |
| Groups: |
| KVM_DEV_ARM_VGIC_GRP_ADDR |
| Attributes: |
| KVM_VGIC_ITS_ADDR_TYPE (rw, 64-bit) |
| Base address in the guest physical address space of the GICv3 ITS |
| control register frame. |
| This address needs to be 64K aligned and the region covers 128K. |
| Errors: |
| -E2BIG: Address outside of addressable IPA range |
| -EINVAL: Incorrectly aligned address |
| -EEXIST: Address already configured |
| -EFAULT: Invalid user pointer for attr->addr. |
| -ENODEV: Incorrect attribute or the ITS is not supported. |
| |
| |
| KVM_DEV_ARM_VGIC_GRP_CTRL |
| Attributes: |
| KVM_DEV_ARM_VGIC_CTRL_INIT |
| request the initialization of the ITS, no additional parameter in |
| kvm_device_attr.addr. |
| Errors: |
| -ENXIO: ITS not properly configured as required prior to setting |
| this attribute |
| -ENOMEM: Memory shortage when allocating ITS internal data |
