PENDING: misc: fastrpc: map ADSP remote heap into remoteproc IOMMU domain#732
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PENDING: misc: fastrpc: map ADSP remote heap into remoteproc IOMMU domain#732quic-anane wants to merge 1 commit into
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…main When the remoteproc has an IOMMU (kernel running at EL2 without a separate hypervisor), memory carveouts must be explicitly mapped into the remoteproc's IOMMU domain so the DSP can access them. Without this mapping the DSP triggers an SMMU translation fault when accessing the remote heap carveout used for audio PD static process creation. Add has_iommu to fastrpc_channel_ctx, set from the "iommus" property of the remoteproc DT node. When set, map the ADSP remote heap carveout into the remoteproc's IOMMU domain using an identity mapping (IOVA == PA) via iommu_map(), and skip qcom_scm_assign_mem() which is only needed when a separate hypervisor manages inter-VM memory access control. Introduce fastrpc_remote_heap_map() and fastrpc_remote_heap_unmap() helpers to encapsulate the IOMMU domain lookup and map/unmap. Signed-off-by: Anandu Krishnan E <anandu.e@oss.qualcomm.com>
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Merge Check Failed: No Change Task Found No associated change tasks found for CR 4564170 on any of the following entities: Entities:
CR: 4564170 Please ensure the CR has a change task associated with at least one of the entities for this branch. |
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@quic-anane please provide exception approval for PENDING change. |
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When the remoteproc has an IOMMU (kernel running at EL2 without a separate hypervisor), memory carveouts must be explicitly mapped into the remoteproc's IOMMU domain so the DSP can access them. Without this mapping the DSP triggers an SMMU translation fault when accessing the remote heap carveout used for audio PD static process creation.
Add has_iommu to fastrpc_channel_ctx, set from the "iommus" property of the remoteproc DT node. When set, map the ADSP remote heap carveout into the remoteproc's IOMMU domain using an identity mapping (IOVA == PA) via iommu_map(), and skip qcom_scm_assign_mem() which is only needed when a separate hypervisor manages inter-VM memory access control.
Introduce fastrpc_remote_heap_map() and fastrpc_remote_heap_unmap() helpers to encapsulate the IOMMU domain lookup and map/unmap.
CRs-Fixed: 4564170
qli-2.0 GA Critical Fix