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mb/google/brya: Mark the WWAN device as an UntrustedDevice 

The ChromiumOS kernel has the ability to restrict devices to their own
IOMMU security domains when ACPI passes this property to a device
downstream of a PCIe RP.

BUG=b:215424986
TEST=verified the property is found and WWAN is restricted to its own
IOMMU domain as expected.

Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: I1717c0976d1d961772245fd420368fe5a9c1262e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61628
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
This commit is contained in:
Tim Wawrzynczak 2022-02-04 09:35:31 -07:00 committed by Felix Held
parent 09c047c297
commit 7d7f3ae69b
2 changed files with 5 additions and 0 deletions
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1
src/mainboard/google/brya/Kconfig
View File

@ -14,6 +14,7 @@ config BOARD_GOOGLE_BRYA_COMMON
select DRIVERS_INTEL_PMC select DRIVERS_INTEL_PMC
select DRIVERS_INTEL_SOUNDWIRE select DRIVERS_INTEL_SOUNDWIRE
select DRIVERS_INTEL_USB4_RETIMER select DRIVERS_INTEL_USB4_RETIMER
select DRIVERS_PCIE_GENERIC
select DRIVERS_SOUNDWIRE_ALC5682 select DRIVERS_SOUNDWIRE_ALC5682
select DRIVERS_SOUNDWIRE_MAX98373 select DRIVERS_SOUNDWIRE_MAX98373
select DRIVERS_SPI_ACPI select DRIVERS_SPI_ACPI

4
src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb
View File

@ -166,6 +166,10 @@ chip soc/intel/alderlake
.clk_req = 5, .clk_req = 5,
.flags = PCIE_RP_LTR | PCIE_RP_AER, .flags = PCIE_RP_LTR | PCIE_RP_AER,
}" }"
chip drivers/pcie/generic
register "is_untrusted" = "1"
device pci 0 on end
end
end #PCIE6 WWAN end #PCIE6 WWAN
device ref pcie_rp8 on device ref pcie_rp8 on
# Enable SD Card PCIE 8 using clk 3 # Enable SD Card PCIE 8 using clk 3