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authorTim Wawrzynczak <twawrzynczak@chromium.org>2022-02-04 09:31:21 -0700
committerFelix Held <felix-coreboot@felixheld.de>2022-02-09 22:46:03 +0000
commit09c047c2972720f6c222407db99d5c36f46666dc (patch)
treef115024d49d9bb310454019d19faff7e96843df9 /src/device/dram/ddr4.c
parentefe0fe2674851ca0decc8ac99f3e2455dbaa0668 (diff)
drivers/pcie/generic: Add new pcie generic chip driver
This new chip driver will be used for attaching ACPI properties to PCIe endpoints. The first property it supports is "UntrustedDevice." This property can be used by a payload to, e.g., restrict the device to its own IOMMU domain for security purposes. The new property is added by adding a _DSD and an integer property set to 1. Example of the property from google/brya0: Scope (\_SB.PCI0.RP01) { Device (DEV0) { Name (_ADR, 0x0000000000000000) // _ADR: Address Name (_DSD, Package (0x02) // _DSD: Device-Specific Data { ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301") /* Device Properties for _DSD */, Package (0x01) { Package (0x02) { "UntrustedDevice", One } } }) } } BUG=b:215424986 TEST=boot patch train on google/brya0, dump SSDT, see above for snippet Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org> Change-Id: I53986614dcbf4d10a6bb4010e131f5ff5a9d25cf Reviewed-on: https://review.coreboot.org/c/coreboot/+/61627 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
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