51 lines
1.5 KiB
Plaintext
51 lines
1.5 KiB
Plaintext
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IOMMU Domains
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An IOMMU domain is a collection of IOMMU context banks and an optional
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virtual address space that is to be used with the domain. Domains that are
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defined will be created at bootup and associated with an iommu group. Clients
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can then refer to the iommu group and perform operations on the iommu group
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instead of individual devices/contexts.
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Required properties
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- compatible: "qcom,iommu-domains"
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- At least one child that defines a domain is required with the
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following properties:
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- label: Name of the domain
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- qcom,iommu-contexts: List of phandles to context that belongs to
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this domain.
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Optional properties
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- qcom,virtual-addr-pool: List of <start_address size> pairs
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that define the virtual address space for this domain.
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- qcom,secure-domain: boolean indicating that this is a secure
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domain that is to be programmed by Trustzone.
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- qcom,l2-redirect: boolean indicating that page tables should
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be cached in L2 cache.
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Example:
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qcom,iommu-domains {
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compatible = "qcom,iommu-domains";
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qcom,iommu-domain1 {
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label = "lpass_secure";
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qcom,iommu-contexts = <&lpass_q6_fw>;
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qcom,virtual-addr-pool = <0x00000000 0x0FFFFFFF
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0xF0000000 0x0FFFFFFF>;
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};
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qcom,iommu-domain2 {
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label = "lpass_audio";
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qcom,iommu-contexts = <&lpass_audio_shared>;
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qcom,virtual-addr-pool = <0x10000000 0x0FFFFFFF>;
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};
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qcom,iommu-domain3 {
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label = "lpass_video";
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qcom,iommu-contexts = <&lpass_video_shared>;
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qcom,virtual-addr-pool = <0x20000000 0x0FFFFFFF>;
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};
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};
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