[L] Change in coreboot[master]: intelblocks/vtd: Add VT-d block with DMA protection API

[Michał Żygowski (Code Review)]

Attention is currently required from: Michał Żygowski, Angel Pons.

Hello build bot (Jenkins), Michał Kopeć,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/68449

to look at the new patch set (#7).

Change subject: intelblocks/vtd: Add VT-d block with DMA protection API
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intelblocks/vtd: Add VT-d block with DMA protection API

Add new common block with VT-d/IOMMU support. The patch adds an
option to enable DMA protection with PMR. However the payload and
OS must support VT-d in order to properly handle I/O devices.

TEST=Enable DMA protection on MSI PRO Z690-A DDR4 and observe
the I/O devices like USB and NVMe fail to enumerate in UEFI
Payload (basically proving that DMA protection works).

Signed-off-by: Michał Żygowski 
Change-Id: Id7edf982457c1139624e5cd383788eda41d6a948
---
A src/soc/intel/common/block/include/intelblocks/vtd.h
A src/soc/intel/common/block/vtd/Kconfig
A src/soc/intel/common/block/vtd/Makefile.inc
A src/soc/intel/common/block/vtd/vtd.c
4 files changed, 357 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/49/68449/7