tree 2052aa4e1db6047d76a6b4e47f908086ec0b50a1
parent 9a035ede17a23127ec4fc451ab84283e79636e75
author Michał Żygowski <michal.zygowski@3mdeb.com> 1665844531 +0200
committer Paul Fagerburg <pfagerburg@chromium.org> 1679061233 +0000

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 <michal.zygowski@3mdeb.com>
Change-Id: Id7edf982457c1139624e5cd383788eda41d6a948
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68449
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Michał Kopeć <michal.kopec@3mdeb.com>