From: Ján Tomko Date: Wed, 19 Mar 2025 00:55:02 +0000 (+0100) Subject: docs: formatdomain: document intel-only IOMMU attributes X-Git-Tag: v11.5.0-rc1~19 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6291b0af3dd6a34b5a0f5f56dafa881d9c262f57;p=thirdparty%2Flibvirt.git docs: formatdomain: document intel-only IOMMU attributes Signed-off-by: Ján Tomko Reviewed-by: Peter Krempa --- diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst index ae054a52b3..0ba31cfaa6 100644 --- a/docs/formatdomain.rst +++ b/docs/formatdomain.rst @@ -9076,14 +9076,15 @@ Example: ``caching_mode`` The ``caching_mode`` attribute with possible values ``on`` and ``off`` can be used to turn on the VT-d caching mode (useful for assigned devices). - :since:`Since 3.4.0` (QEMU/KVM only) + :since:`Since 3.4.0` (QEMU/KVM and ``intel`` model only) ``eim`` The ``eim`` attribute (with possible values ``on`` and ``off``) can be used to configure Extended Interrupt Mode. A q35 domain with split I/O APIC (as described in `Hypervisor features`_), and both interrupt remapping and EIM turned on for the IOMMU, will be able to - use more than 255 vCPUs. :since:`Since 3.4.0` (QEMU/KVM only) + use more than 255 vCPUs. :since:`Since 3.4.0` (QEMU/KVM and ``intel`` model + only) ``iotlb`` The ``iotlb`` attribute with possible values ``on`` and ``off`` can be @@ -9093,14 +9094,14 @@ Example: ``aw_bits`` The ``aw_bits`` attribute can be used to set the address width to allow mapping larger iova addresses in the guest. :since:`Since 6.5.0` (QEMU/KVM - only) + and ``intel`` model only) ``dma_translation`` The ``dma_translation`` attribute with possible values ``on`` and ``off`` can be used to turn off the dma translation for IOMMU. It is useful when only interrupt remapping is required but dma translation overhead is unwanted, for example to efficiently enable more than 255 vCPUs. - :since:`Since 10.7.0` (QEMU/KVM only) + :since:`Since 10.7.0` (QEMU/KVM and ``intel`` model only) The ``virtio`` IOMMU devices can further have ``address`` element as described in `Device addresses`_ (address has to by type of ``pci``).