1## SPDX-License-Identifier: GPL-2.0-only 2 3config SOC_INTEL_COMMON_BLOCK_VTD 4 bool 5 depends on PLATFORM_USES_FSP2_0 6 help 7 Intel Processor common VT-d/IOMMU support 8 9config ENABLE_EARLY_DMA_PROTECTION 10 bool "Enable early DMA protection" 11 depends on SOC_INTEL_COMMON_BLOCK_VTD 12 default n 13 help 14 Setting this makes the whole memory from 0 to TOLUM and from 4GB 15 to TOUUD DMA protected with VT-d PMR registers. 16 17 Disable this setting if your OS does not support IOMMU. The payload 18 must be aware of the DMA protection, otherwise I/O devices might not 19 work. 20 21 If unsure, say N. 22